feat: tests & bootstrap

big mess, I don't remember what I was trying to accomplish there

.env.example

@@ -0,0 +1,18 @@
+# Base URL of the Django REST backend.
+#
+#   - '/api'                         same-origin. The Vite dev server proxies
+#                                    this prefix to VITE_API_PROXY_TARGET (see
+#                                    below); in production your web server
+#                                    routes /api to Django.
+#   - 'http://localhost:8000/api'    talk to Django directly. CORS must be
+#                                    enabled there. No proxy is registered.
+VITE_API_BASE_URL=/api
+
+# Where the dev server should proxy API requests when VITE_API_BASE_URL is a
+# relative path. Ignored for absolute URLs or when mocking.
+VITE_API_PROXY_TARGET=http://localhost:8000
+
+# When set to 'true', the Vite dev server serves a fake backend from
+# mocks/vitePlugin.ts. No Django required. The real backend (if any) is
+# ignored in that case.
+VITE_USE_MOCK_API=false

.gitignore

@@ -21,3 +21,7 @@ Thumbs.db
 # Vite
 vite.config.js.timestamp-*
 vite.config.ts.timestamp-*
+
+# AI tools
+.claude
+tmpclaude*

.prettierrc

@@ -0,0 +1,8 @@
+{
+  "tabWidth": 4,
+  "endOfLine": "lf",
+  "printWidth": 120,
+  "useTabs": true,
+  "htmlWhitespaceSensitivity": "ignore",
+  "bracketSameLine": true
+}

README.md

@@ -1,38 +1,44 @@
-# sv
+# leaflet_svelte
 
-Everything you need to build a Svelte project, powered by [`sv`](https://github.com/sveltejs/cli).
+Weather-balloon trajectory planner. Static SvelteKit SPA that talks to a Django
+REST backend.
 
-## Creating a project
-
-If you're seeing this, you've probably already done this step. Congrats!
+## Quick start
 
 ```bash
-# create a new project in the current directory
-npx sv create
+npm install
 
-# create a new project in my-app
-npx sv create my-app
-```
-
-## Developing
-
-Once you've created a project and installed dependencies with `npm install` (or `pnpm install` or `yarn`), start a development server:
-
-```bash
+# dev against a local Django on :8000 (see .env.example)
 npm run dev
 
-# or start the server and open the app in a new browser tab
-npm run dev -- --open
-```
+# dev with a fake backend (no Django needed)
+VITE_USE_MOCK_API=true npm run dev
 
-## Building
-
-To create a production version of your app:
-
-```bash
+# type-check + production build (emits static files to ./build)
+npm run check
 npm run build
 ```
 
-You can preview the production build with `npm run preview`.
+Serve `build/` from any static host. Route fallback is `index.html`.
 
-> To deploy your app, you may need to install an [adapter](https://svelte.dev/docs/kit/adapters) for your target environment.
+## Documentation
+
+- [`docs/ARCHITECTURE.md`](docs/ARCHITECTURE.md) — module layout and data flow.
+- [`docs/CONVENTIONS.md`](docs/CONVENTIONS.md) — naming, styling, component patterns.
+- [`docs/ADDING_A_FEATURE.md`](docs/ADDING_A_FEATURE.md) — walkthrough for adding
+  a new panel/feature.
+- [`docs/TESTING.md`](docs/TESTING.md) — e2e tests against the real Django +
+  predictor stack.
+- [`mocks/`](mocks/) — Vite dev-server mock backend.
+- [`scripts/run-stack.sh`](scripts/run-stack.sh) — boot Vite + Django +
+  fake predictor in one command.
+
+## Stack
+
+- **SvelteKit + Vite** (TypeScript, Svelte 5 runes) — built as a pure SPA with
+  `@sveltejs/adapter-static`.
+- **MapLibre GL JS** via the `$map` abstraction — the app never imports
+  `maplibre-gl` directly outside `src/lib/map/`.
+- **Sveltestrap** + Bootstrap 5 for UI chrome.
+- **Chart.js** for the ascent/descent profile editor.
+- **@vincjo/datatables** for editor tables.

build.js

@@ -1,390 +0,0 @@
-const compile = require( 'svelte/compiler' ).compile
-
-const chokidar = require( 'chokidar' );
-const esbuild = require( 'esbuild' );
-const {readdirSync, statSync, existsSync, writeFileSync, readFileSync} = require( 'fs' );
-const {join, basename, resolve, dirname, relative} = require( 'path' );
-const sveltePlugin = require( 'esbuild-svelte' );
-const {sum} = require( 'lodash' );
-const parse5 = require( 'parse5' );
-const notifier = require('node-notifier');
-
-process.on('uncaughtException', error => {
-  notifier.notify({
-    title: 'Error occurs',
-    message: `${error}`
-  });
-});
-
-const [watch, serve, minify, debug, logVars] = ['--watch', '--serve', '--minify', '--debug', '--log-vars'].map( s =>
-  process.argv.includes( s )
-);
-const debug_console_log = ( args, returnIndex = 0 ) => (debug && console.log( ...args ), args[ returnIndex ]);
-
-const ignorePath = new Set( [
-  'node_modules',
-  '.vscode',
-  '.idea',
-  '.git',
-  '.gitignore',
-  'build.js',
-  'package-lock.json',
-  'package.json',
-  'README.md',
-  'build.js',
-  'pullpush.sh',
-] );
-
-// find page candidates
-function findPages( dir = '.', sink = [] ) {
-  if( ignorePath.has( dir.replace( './', '' ).replace( '.\\', '' ) ) ) {
-    debug && console.log( 'skip:', dir );
-    return;
-  }
-  
-  const files = readdirSync( dir ).filter( f => f[ 0 ]!=='_' );
-  const svelteFiles = files.filter( f => f.endsWith( '.svelte' ) && statSync( join( dir, f ) ).isFile() );
-  svelteFiles.forEach( f => sink.push( join( dir, f ) ) );
-  
-  files
-    .filter( f => !svelteFiles.includes( f ) )
-    .map( f => join( dir, f ) )
-    .filter( f => statSync( f ).isDirectory() )
-    .forEach( f => findPages( f, sink ) );
-  return sink;
-}
-
-const _zId_prefix = `z_placeholder_${Math.floor( Math.random() * 1000000000 ).toString( 16 )}_`;
-const _zReplacer = s => debug_console_log( ['z-replace:', s, `"${_zId_prefix}${Buffer.from( s ).toString( 'base64' )}"`], 2 );
-
-const zPlaceholderReplacer = content =>
-  
-  content?.replace( /\#\{\s*\w+\s*\}/gs, _zReplacer ) // #{ key }
-    .replace( /\/\*\!\s*\w+\s*\*\//gs, _zReplacer ) // map /*! mapKey */
-    .replace( /\[\s*\/\*\s*\w+\s*\*\/\s*\]/gs, _zReplacer ) // map [/* mapKey */]
-    .replace( /\{\s*\/\*\s*\w+\s*\*\/\s*\}/gs, _zReplacer ); // map {/* mapKey */}
-
-global.zPlaceholderReplacer = zPlaceholderReplacer;
-
-const zPlaceholderRestore = ( content, sink ) =>
-  content?.replace( new RegExp( `("|')${_zId_prefix}(\\w+=*)\\1`, 'g' ), ( _, _2, s ) => {
-    s = Buffer.from( s, 'base64' ).toString( 'ascii' );
-    sink.push( s );
-    debug && console.log( 'z-restore', _, s );
-    return s;
-  } );
-
-const svelteJsPathResolver = {
-  name: 'svelteJsPathResolver',
-  setup( build ) {
-    const options = {filter: /\.svelte\.(ts)$/};
-    
-    build.onResolve( options, ( {path, resolveDir} ) => ({path: join( resolveDir, path )}) );
-    build.onLoad( options, ( {path} ) => {
-      return {
-        contents: `
-            import App from "./${basename( path ).replace( /\.ts$/, '' )}";
-            export const app = new App({ target: document.getElementById("app") });
-        `,
-        loader: 'ts',
-        resolveDir: dirname( path ),
-      };
-    } );
-  },
-};
-
-function createBuilder( entryPoints ) {
-  console.log( 'pages:', entryPoints );
-  
-  return esbuild.build( {
-    entryPoints: entryPoints.map( s => s + '.ts' ),
-    bundle: true,
-    outdir: '.',
-    write: false,
-    plugins: [svelteJsPathResolver, sveltePlugin( require( './svelte.config' ) )],
-    incremental: !!watch,
-    sourcemap: false,
-    minify,
-    } )
-}
-
-function layoutFor( path, content = {} ) {
-  path = (() => {
-    let temp = join( path, '..', '_layout.html' );
-    
-    while( true ) {
-      if( existsSync( temp ) ) return temp;
-      if( resolve( __dirname )===resolve( dirname( temp ) ) ) return;
-      
-      temp = join( temp, '../..', '_layout.html' );
-    }
-  })();
-  
-  layoutFor.cache = layoutFor.cache || {};
-  
-  const defaultKey = '_DEFAULT_LAYOUT';
-  if( !path && layoutFor.cache[ defaultKey ] ) return layoutFor.cache[ defaultKey ];
-  
-  let cache = layoutFor.cache[ path ];
-  const m = statSync( path ).mtimeMs;
-  if( cache && m===cache.m ) return cache;
-  
-  const tree = parse5.parse(
-    path
-      ? readFileSync( path, 'utf-8' )
-      : `<!DOCTYPE html>
-<html>
-  <head>
-    <title>#{title}</title>
-  </head>
-  <body>
-    <h1>layout not found, please create <b>_layout.html</b></h1>
-    <slot></slot>
-  </body>
-</html>`
-  );
-  
-  let slot = null;
-  let body = null;
-  
-  let stack = [...tree.childNodes];
-  
-  while( stack.length && (slot==null || body==null) ) {
-    const t = stack.pop();
-    if( t.nodeName==='body' ) body = t;
-    if( t.nodeName==='slot' || (t.nodeName==='#comment' && t.data?.trim()==='content_goes_here') ) slot = t;
-    
-    t.childNodes && (stack = [...stack, ...t.childNodes]);
-  }
-  
-  if( !body ) throw new Error( 'body not found' );
-  
-  const appKEY = `${Math.random()}-APP-${Math.random()}`;
-  if( slot ) {
-    slot.nodeName = 'main';
-    slot.tagName = 'main';
-    delete slot.data;
-    slot.attrs = [
-      {name: 'id', value: 'app'},
-      ...(slot.attrs || [])?.filter( t => t.name!=='id' )
-    ];
-    slot.childNodes = [{nodeName: '#text', value: appKEY}]
-  } else {
-    body.childNodes.push( {
-      nodeName: 'main',
-      tagName: 'main',
-      attrs: [{name: 'id', value: 'app'}],
-      childNodes: [{nodeName: '#text', value: appKEY}],
-      namespaceURI: body.namespaceURI,
-    } );
-  }
-  
-  // Remove main content
-  // content showing only for seo friendly
-  body.childNodes.push( {
-    nodeName: 'script',
-    tagName: 'script',
-    attrs: [],
-    childNodes: [{nodeName: '#text', value: "document.getElementById('app').innerHTML=''"}],
-    namespaceURI: body.namespaceURI,
-  } )
-  
-  const jsKEY = `${Math.random()}-JS-${Math.random()}`;
-  const cssKEY = `${Math.random()}-CSS-${Math.random()}`;
-  const comments = {
-    nodeName: '#comment',
-    data: '',
-  };
-  const cssVarsComments = {
-    nodeName: '#comment',
-    data: '',
-  };
-  const jsVarsComments = {
-    nodeName: '#comment',
-    data: '',
-  };
-  
-  body.childNodes = [
-    ...body.childNodes,
-    comments,
-    {
-      nodeName: '#text',
-      value: '\n',
-    },
-    logVars && cssVarsComments,
-    {
-      nodeName: '#text',
-      value: '\n',
-    },
-    logVars && jsVarsComments,
-    {
-      nodeName: '#text',
-      value: '\n',
-    },
-    {
-      nodeName: 'style',
-      tagName: 'style',
-      attrs: [],
-      childNodes: [{nodeName: '#text', value: cssKEY}],
-      namespaceURI: body.namespaceURI,
-    },
-    {
-      nodeName: '#text',
-      value: '\n',
-    },
-    {
-      nodeName: 'script',
-      tagName: 'script',
-      attrs: [],
-      childNodes: [{nodeName: '#text', value: jsKEY}],
-      namespaceURI: body.namespaceURI,
-    },
-    {
-      nodeName: '#text',
-      value: '\n',
-    },
-  ];
-  
-  debug && console.log( 'build layout for:', path || defaultKey );
-  
-  return (layoutFor.cache[ path || defaultKey ] = ( {js, css} ) => {
-    const cssVars = [],
-      jsVars = [];
-    js = zPlaceholderRestore( js, jsVars ) || '';
-    css = zPlaceholderRestore( css, cssVars ) || '';
-    
-    //comments.data = `BUILD TIME: ${new Date().toISOString()}`;
-    cssVarsComments.data = cssVars.length ? `--- CSS z-vars --- \n${cssVars.join( '\n' )}` : '';
-    jsVarsComments.data = jsVars.length ? `--- JS z-vars --- \n${jsVars.join( '\n' )}` : '';
-    
-    let html = content.html || '';
-    const innerCss = (content.css || {}).code || '';
-    
-    return parse5.serialize( tree ).
-      replace( cssKEY, css + innerCss ).
-      replace( jsKEY, js ).
-      replace( appKEY, html ).
-      replaceAll("fakecss:"+__dirname,'fakecss:.');
-  });
-}
-
-(async () => {
-  let watcherReady = false;
-  
-  watch && console.log( 'first build start' );
-  let pages = findPages();
-  let builder = await createBuilder( pages );
-  
-  const compiledFiles = new Set();
-  let cache = {};
-  
-  function saveFiles( files = builder, layoutChanged = false ) {
-    const output = {};
-    let unchanged = 0;
-    // path = bla.svelte.js or bla.svelte.css
-    for( const {path, text} of files.outputFiles ) {
-      const ext = /\.(\w+)$/.exec( path )?.[ 1 ];
-      if( ext!=='css' && ext!=='js' ) throw new Error( 'unknown ext:' + ext );
-      
-      // bla.js or bla.css
-      const key = path.replace( /\.svelte\.\w+$/, '' );
-      
-      output[ key ] = output[ key ] || {};
-      output[ key ][ ext ] = text
-      
-      if( cache[ path ]===text && !layoutChanged ) {
-        unchanged += 1;
-        continue;
-      }
-      cache[ path ] = text;
-    }
-    
-    // do nothing if nothing's changed
-    if( unchanged===files.outputFiles.length ) return;
-    
-    if( Object.keys( output ).length===0 ) return console.log( 'no changes' );
-    
-    // for each .html files need to be generated
-    Object.entries( output ).forEach( ( [path, data] ) => {
-      const renderedSvelte = compile( path + '.svelte' );
-      
-      const content = layoutFor( path, renderedSvelte )( data );
-      
-      path = resolve( path + '.html' );
-      compiledFiles.add( path );
-      console.log( 'compiled:', relative( resolve( __dirname ), path ) );
-      writeFileSync( path, content );
-    } );
-  }
-  
-  saveFiles();
-  watch && console.log( 'first build end' );
-  
-  if( watch ) {
-    const pagesPaths = new Set( pages.map( p => resolve( p ) ) );
-    
-    let timeRef = null;
-    
-    function changeListener( path, stats, type, watcher ) {
-      switch (type) {
-      case 'change':
-        notifier.notify({
-          title: 'Change occurs',
-          message: `Change occurs in "${path}"`
-        });
-        break;
-      case 'add':
-        notifier.notify({
-          title: 'File added',
-          message: `Added file "${path}"`
-        });
-        break;
-      case 'unlink':
-        notifier.notify({
-          title: 'File remove',
-          message: `Removed file "${path}"`
-        });
-        break;
-      }
-
-      if( compiledFiles.has( resolve( path ) ) ) return;
-      console.log( type + ':', path.replace( __dirname, '' ) );
-      
-      const svelteFile = path[ 0 ]!=='_' && path.endsWith( '.svelte' );
-      
-      let pagesChanged = true;
-      if( svelteFile && type==='add' ) pagesPaths.add( resolve( path ) );
-      else if( svelteFile && type==='unlink' ) pagesPaths.delete( resolve( path ) );
-      else pagesChanged = false;
-      
-      let layoutChanged = path.endsWith( '_layout.html' );
-      
-      if( timeRef ) clearTimeout( timeRef );
-      timeRef = setTimeout( async () => {
-        pagesChanged
-          ? saveFiles( (builder = await createBuilder( Array.from( pagesPaths, p => relative( __dirname, p ) ) )), layoutChanged )
-          : saveFiles( await builder.rebuild(), layoutChanged );
-      }, 200 );
-    }
-    
-    const watcher = chokidar
-      .watch( '.', {ignored: s => ignorePath.has( s ) || ignorePath.has( join( './', s ) ), ignoreInitial: true} )
-      .on( 'change', ( path, stats ) => changeListener( path, stats, 'change', watcher ) )
-      .on( 'add', ( path, stats ) => changeListener( path, stats, 'add', watcher ) )
-      .on( 'unlink', ( path, stats ) => changeListener( path, stats, 'unlink', watcher ) )
-      .on( 'ready', () => {
-        console.log( `watching ${sum( Object.values( watcher.getWatched() ).map( t => t.length ) )} files/dirs for changes` );
-        watcherReady = true;
-      } )
-      .on( 'error', err => console.log( 'ERROR:', err ) );
-  }
-  
-  const FiveServer = require( 'five-server' ).default;
-  serve &&
-  (await new FiveServer().start( {
-    open: true,
-    workspace: __dirname,
-    ignore: [...ignorePath, /\.(js|ts|svelte)$/, /\_layout\.html$/],
-    wait: 500,
-  } ));
-})();

docs/ADDING_A_FEATURE.md

@@ -0,0 +1,152 @@
+# Adding a feature
+
+Walk-through for building a new side-panel feature. We'll use a hypothetical
+"NOTAMs" panel (no-fly-zone overlays) as the example.
+
+## 1. Pick a feature folder
+
+```
+src/lib/features/notams/
+├── index.ts
+├── store.ts
+├── types.ts
+├── NotamsPanel.svelte
+└── NotamRenderer.svelte    # if you draw on the map
+```
+
+Re-export the public surface from `index.ts`.
+
+## 2. Define the domain
+
+If the feature introduces a durable type (something saved to a server or
+localStorage), put the type in `src/lib/domain/notam.ts` and re-export from
+`src/lib/domain/index.ts`. Ephemeral state types can live in the feature's
+`types.ts`.
+
+```ts
+// src/lib/domain/notam.ts
+export interface Notam {
+  id: string;
+  code: string;
+  polygon: LatLngTuple[];
+  validFrom: string;
+  validTo: string;
+}
+```
+
+## 3. Add state
+
+Feature-scoped stores go in the feature folder. Use `persisted()` if the user
+should not lose the state on reload, plain `writable()` otherwise.
+
+```ts
+// src/lib/features/notams/store.ts
+import { persisted } from '$state';
+import type { Notam } from '$domain';
+
+export const notamsStore = persisted<Notam[]>('notams', []);
+```
+
+## 4. Add API (if needed)
+
+```ts
+// src/lib/api/notams.ts
+import { api } from './client';
+import type { Notam } from '$domain';
+export const notamsApi = { list: () => api.get<Notam[]>('/notams/') };
+```
+
+And export from `src/lib/api/index.ts`.
+
+## 5. Build the panel
+
+Re-use UI primitives. Wrap everything in `CollapsibleCard` so it lands in the
+side panel.
+
+```svelte
+<!-- src/lib/features/notams/NotamsPanel.svelte -->
+<script lang="ts">
+  import { CollapsibleCard } from '$ui';
+  import { t } from '$i18n';
+  import { notamsStore } from './store';
+</script>
+
+<CollapsibleCard title={$t('notams.title')}>
+  {#each $notamsStore as notam (notam.id)}
+    <div>{notam.code}</div>
+  {/each}
+</CollapsibleCard>
+```
+
+## 6. Add i18n keys
+
+Append to `src/lib/i18n/locales/ru.json` and `en.json`. The lookup is
+dot-separated:
+
+```json
+{
+  "notams": {
+    "title": "NOTAMs",
+    "empty": "Нет активных NOTAMs"
+  }
+}
+```
+
+## 7. Draw on the map (optional)
+
+Every on-map drawing goes through a Scene. One scene per feature, or per sub-
+entity if the feature manages many independent overlays (like workspaces).
+
+```svelte
+<!-- src/lib/features/notams/NotamRenderer.svelte -->
+<script lang="ts">
+  import { getMap } from '$map';
+  import { notamsStore } from './store';
+
+  const map = getMap();
+  if (!map) throw new Error('NotamRenderer requires a <Map /> ancestor');
+
+  $effect(() => {
+    const scene = map.scene('notams');
+    scene.clear();
+    for (const n of $notamsStore) {
+      // scene.addLine/addCircle/etc.
+    }
+  });
+</script>
+```
+
+Add `<NotamRenderer />` as a child of `<MapView />` in the predict route.
+
+## 8. Wire into the route
+
+```svelte
+<!-- src/routes/predict/+page.svelte -->
+<MapView>
+  <WorkspaceRenderer />
+  <NotamRenderer />
+  <PanelContainer position="right">
+    <TabBar tabs={[...] } bind:active={rightTab} />
+    {#if rightTab === 'notams'}
+      <NotamsPanel />
+    {/if}
+  </PanelContainer>
+</MapView>
+```
+
+## 9. Add a settings entry (optional)
+
+If the feature should be toggleable, extend `src/lib/features/settings/store.ts`
+and `schema.ts`. Keep the field declarative (kind + labelKey + path) — the
+SettingsPanel renders it automatically.
+
+## 10. Checklist before you open a PR
+
+- [ ] `npm run check` passes
+- [ ] `npm run build` passes
+- [ ] All user-visible strings routed through `$t`
+- [ ] Feature only depends on shared modules (`$domain`, `$state`, `$api`,
+      `$ui`, `$map`) — not on other features' internals
+- [ ] `index.ts` exports only what the outside world needs
+- [ ] Panel matches existing visual language (CollapsibleCard, Bootstrap sm
+      form controls, same spacing)

docs/ARCHITECTURE.md

@@ -0,0 +1,105 @@
+# Architecture
+
+## Layer overview
+
+```
+src/
+├── routes/                 # SvelteKit pages (thin; they compose features)
+├── app.html                # plain SPA shell
+├── app.css                 # global styles (imports Bootstrap + bootstrap-icons)
+└── lib/
+    ├── domain/             # pure types + pure functions (no Svelte, no fetch)
+    ├── state/              # store factories (persisted, broadcast across tabs)
+    ├── api/                # HTTP client + resource modules (points, scenarios…)
+    ├── auth/               # auth store, login/logout, requireAuthenticated()
+    ├── i18n/               # t() store, locale loading, message dictionaries
+    ├── map/                # IMap interface + MapLibre impl + plot helpers + tools
+    ├── ui/                 # library-agnostic primitives (panel, tab, editor…)
+    └── features/           # vertical slices — one folder per feature
+        ├── auth/           # Navbar, LoginForm
+        ├── footer/
+        ├── prediction/     # ControlPanel, ScenarioPanel, Point/Scenario/Curve editors
+        ├── tracking/       # TelemetryPanel
+        ├── workspaces/     # multi-layer workspace system
+        ├── timeline/       # global playback clock
+        └── settings/       # schema-driven settings panel
+mocks/                      # dev-server API mock (enabled via VITE_USE_MOCK_API)
+```
+
+**Rules of thumb**
+
+- `domain/` depends on nothing.
+- `state/`, `i18n/`, `api/` depend only on `domain/`.
+- `map/` depends on `domain/` (and Maplibre, internally).
+- `ui/` depends on `domain/`, `state/`, `i18n/` at most.
+- `features/*` depend on everything in `lib/` but never on each other directly
+  — cross-feature coordination happens through stores (e.g. `workspacesStore`
+  is shared by prediction + timeline).
+- `routes/` compose features. Pages stay thin.
+
+## Data flow
+
+### Stores
+`$state` → persisted via `persisted()` (localStorage + BroadcastChannel for
+cross-tab sync). `workspaces`, `settings`, and `auth` state live here.
+
+### API calls
+All go through `$api` (`src/lib/api/client.ts`) which:
+- prepends `VITE_API_BASE_URL`
+- reads the `csrftoken` cookie (priming it via `/api/csrf/` if missing)
+- serializes JSON bodies and parses structured DRF errors into `ApiError`
+- delegates 401s to the auth layer (`setUnauthorizedHandler`)
+
+### Auth
+`authStore` is the single source of truth for who is logged in. Pages that
+require auth call `requireAuthenticated()` from `$auth` in `onMount` — this
+refreshes state and redirects to `/login` if anonymous. The API client triggers
+the same redirect on 401s.
+
+### Map
+The map library is behind the `IMap` interface. Every plot operation (line,
+marker, circle) runs through a **Scene** — a named collection of layers owned
+by a feature. When a feature is done with its layers, `scene.clear()` or
+`map.disposeScene(name)` removes them all at once. This is how each workspace
+paints an independent trajectory without stepping on its neighbors.
+
+Swapping MapLibre for another library means implementing `IMap` once (see
+`src/lib/map/maplibre.ts`) and updating `createMapLibreMap()` at one
+call-site inside `Map.svelte`.
+
+### Workspaces
+A workspace is an independently-configured prediction layer. The user creates
+several, edits their flight parameters separately, runs each one, and sees all
+their trajectories overlaid on the same map with their own colors and
+opacities. `workspacesStore.run(id)` calls the prediction API and stores the
+result in-memory on that workspace.
+
+`WorkspaceRenderer.svelte` listens to the workspaces store and repaints layers
+when workspaces change. It also drives the **global timeline**: whenever
+workspaces change it recomputes the global `[min, max]` time range (the union
+of every visible workspace’s trajectory span) and updates the timeline store.
+
+### Timeline
+`timelineStore` is a plain writable backed by a `requestAnimationFrame` loop.
+It exposes `play`/`pause`/`seek`/`setSpeed`. `WorkspaceRenderer` subscribes to
+`time` and draws a cursor marker on each visible workspace at that timestamp.
+Workspaces stay in sync because they all sample the same clock.
+
+### i18n
+`initI18n()` (called from the root layout) loads the saved locale from
+localStorage, imports the JSON dictionary, and stores it. Components use the
+`$t` store from `$i18n`:
+
+```svelte
+<h5>{$t('panel.workspaces')}</h5>
+```
+
+Adding a locale: drop `xx.json` under `src/lib/i18n/locales/`, register it in
+`loaders` and in the `Locale` type.
+
+## Build & deploy
+
+- `@sveltejs/adapter-static` with `fallback: 'index.html'` produces a pure SPA.
+- SSR is disabled in the root `+layout.ts` (`ssr = false`, `prerender = false`).
+- CSS is imported once in `+layout.svelte` (which loads `app.css`).
+- No server-side routes. All data comes from the Django REST backend.

docs/CONVENTIONS.md

@@ -0,0 +1,132 @@
+# Conventions
+
+## TypeScript
+
+- Every file is `.ts` or `<script lang="ts">`. No plain JS outside build config.
+- Types live next to the code they describe. Cross-feature types go in
+  `src/lib/domain/`.
+- Prefer `interface` for object shapes, `type` for unions/aliases.
+- Avoid `any`. `unknown` + a narrowing cast is preferred.
+
+## File & folder naming
+
+- **Components**: `PascalCase.svelte`. Exception: pseudo-routes `+page.svelte`
+  etc. per SvelteKit.
+- **Plain modules**: `kebab-or-camel.ts`.
+- **Feature directories**: lowercase (`workspaces`, `prediction`).
+- Each feature folder has an `index.ts` that re-exports its public surface;
+  outside code imports from the index, not from individual files.
+
+## Component naming inside `<script>`
+
+- `$state`/`$derived` variables — camelCase, no prefix.
+  ```ts
+  let isCollapsed = $state(false);
+  let currentPoint = $derived($pointsStore.find(p => p.id === id));
+  ```
+- Component instance refs — camelCase + `Ref`.
+  ```ts
+  let pointEditorRef: PointEditor | null = $state(null);
+  ```
+- Event handlers — `handleXxx`.
+  ```ts
+  function handleSave() { … }
+  ```
+- Props that are event callbacks — `onXxx`.
+  ```svelte
+  let { onSelect = () => {} }: Props = $props();
+  ```
+- HTML `id` attributes — kebab-case, prefixed with a 2–3 letter component code
+  (`cp-start-time` for ControlPanel). This keeps IDs globally unique.
+- Stores — PascalCase + `Store` (for top-level domain stores) OR camelCase
+  (for feature-scoped stores). Both are fine; be consistent within a module.
+
+## Props contract
+
+Use the Svelte 5 `Props` interface pattern:
+
+```ts
+interface Props {
+  title?: string;
+  collapsed?: boolean;
+  onToggle?: () => void;
+  children?: Snippet;
+}
+let {
+  title = '',
+  collapsed = $bindable(false),
+  onToggle = () => {},
+  children,
+}: Props = $props();
+```
+
+Do not use `export let` in new components.
+
+## State
+
+- Persisted state (survives reload, syncs across tabs): `persisted(key, initial)`
+  from `$state`.
+- Ephemeral UI state (modal open, which tab is active): plain `$state`.
+- Cross-component state that isn't user-facing persistence: create a small
+  factory module under the feature folder (`store.ts`) — never a bare
+  `writable()` in a `.svelte` file.
+
+## Imports
+
+Use path aliases (`$api`, `$auth`, `$domain`, `$map`, `$state`, `$ui`, `$i18n`,
+`$features`). Example:
+
+```ts
+import { api } from '$api';
+import { authStore, requireAuthenticated } from '$auth';
+import type { Prediction } from '$domain';
+import { Map, plotPrediction } from '$map';
+import { CollapsibleCard, addToast } from '$ui';
+import { t } from '$i18n';
+import { workspacesStore } from '$features/workspaces';
+```
+
+Avoid importing from `src/lib/components/...` (it no longer exists).
+
+## Strings
+
+No hardcoded Russian/English text in new code. Add the key to both
+`src/lib/i18n/locales/ru.json` and `en.json` and read it with `$t('...')`.
+
+Placeholders use `{name}`:
+
+```ts
+$t('workspaces.deleteConfirm', { name: w.name })
+```
+
+## Comments
+
+Default is no comment. Add one only when the *why* is non-obvious (hidden
+invariants, workarounds, API quirks). Don’t restate what the code does.
+
+Module-level docstrings are welcome: put a short paragraph at the top of a
+file that describes the role of the module, mentioning any non-obvious design
+choices. See `src/lib/state/persisted.ts` for an example.
+
+## CSS
+
+- Global chrome lives in `src/app.css`.
+- Component-scoped styles go inside the `.svelte` file.
+- Use Bootstrap utility classes when possible; only add custom CSS when the
+  design requires it.
+- Never use `!important` except to override third-party libs (MapLibre,
+  Bootstrap).
+
+## Testing
+
+Not set up yet. When tests arrive: feature modules should be testable without
+Svelte — that's why `domain/` and `state/` are pure.
+
+## Don't
+
+- Don’t reach into `maplibre-gl` directly from a feature component — extend
+  `IMap` or add a helper in `$map` instead.
+- Don’t mutate localStorage from a component. Use a persisted store.
+- Don’t perform fetches from a component. Call a `$api` module.
+- Don’t redirect the user on auth failures from individual pages. Use
+  `requireAuthenticated()` at the top of `onMount`.

docs/TESTING.md

@@ -0,0 +1,120 @@
+# Testing
+
+End-to-end tests run against the **full chain**:
+
+```
+Playwright → leaflet_svelte (Vite :5173)
+                 │   proxies /api → :8000
+                 ▼
+           stratoflights Django (:8000)
+                 │   TAWHIRI_BASE_URL → :8001
+                 ▼
+           fake_tawhiri stub (:8001)
+```
+
+The real production flow replaces the stub with
+[tawhiri](https://fly.stratonautica.ru/api/v2/) or the Go-based
+`predictor-refactored` running on `:8080`. Any service that speaks the
+Tawhiri v2 query-string protocol is drop-in compatible.
+
+## One-time setup
+
+**Python deps for stratoflights** (uses sqlite via `DJANGO_ENV=production` to
+avoid needing Postgres):
+
+```bash
+pip install --user --break-system-packages \
+  Django djangorestframework djangorestframework-simplejwt drf-spectacular \
+  requests django-cors-headers Pillow python-dotenv channels daphne
+```
+
+**Initialize the Django DB** (sqlite at `stratoflights/db.sqlite3`):
+
+```bash
+cd /home/anton/stratoflights
+DJANGO_ENV=production python3 manage.py migrate
+DJANGO_ENV=production \
+  DJANGO_SUPERUSER_USERNAME=demo \
+  DJANGO_SUPERUSER_PASSWORD=demo \
+  DJANGO_SUPERUSER_EMAIL=demo@demo.demo \
+  python3 manage.py createsuperuser --noinput
+```
+
+**Playwright browsers** (first time only):
+
+```bash
+cd /home/anton/leaflet_svelte
+npx playwright install chromium
+```
+
+## Running tests
+
+```bash
+# Start the full stack (Vite, Django, fake predictor).
+scripts/run-stack.sh
+
+# Run the Playwright suite.
+npm run test:e2e
+
+# Tear down.
+scripts/stop-stack.sh
+```
+
+Individual files: `npm run test:e2e -- tests/e2e/workspaces.spec.ts`.
+UI mode for debugging: `npm run test:e2e:ui`.
+
+## Test organization
+
+| File | Covers |
+|------|--------|
+| `auth.spec.ts` | Anonymous → login redirect, form login, already-authed visits |
+| `smoke.spec.ts` | Page loads, MapLibre canvas mounts, navbar renders |
+| `workspaces.spec.ts` | Auto-create, add/remove, prediction render pipeline |
+| `settings.spec.ts` | Locale switch updates UI text live |
+| `saved-points.spec.ts` | Point editor modal opens |
+
+Fixtures (`tests/e2e/fixtures.ts`) provide `login(context)` / `logout(context)`
+helpers that go through `page.context().request` so cookies are shared with
+the page.
+
+## Key gotchas
+
+- **Django CSRF is origin-aware.** If Playwright hits `127.0.0.1:5173` but
+  `CSRF_TRUSTED_ORIGINS` only lists `localhost:5173`, every POST returns 403
+  with `{"detail": "CSRF Failed: Origin checking failed"}`. `run-stack.sh`
+  adds both hostnames to `CSRF_TRUSTED_ORIGINS`.
+- **Test parallelism is disabled** (`fullyParallel: false`, `workers: 1`)
+  because fixtures share the Django sqlite DB. If we ever want parallel
+  workers we need per-worker DBs.
+- **The fake tawhiri never fails.** To test the frontend's error path you
+  need to either stop the fake or point `TAWHIRI_BASE_URL` at an unreachable
+  host.
+- **`window._lsvMap`** is only set in dev builds (`import.meta.env.DEV`), so
+  the workspace render test won't see the layer names in a production bundle.
+
+## Swapping in the Go predictor
+
+`fake_tawhiri.py` is an expedient stub. To swap in the real Go predictor:
+
+```bash
+cd /home/anton/predictor-refactor/predictor-refactored
+PREDICTOR_DATA_DIR=/tmp/predictor-data go run ./cmd/api &
+# ^ first run downloads ~9 GB of GFS GRIB data; takes 30–60 minutes.
+
+# Then restart stratoflights with TAWHIRI_BASE_URL pointing at it:
+cd /home/anton/stratoflights
+TAWHIRI_BASE_URL=http://127.0.0.1:8080/api/v1/ python3 manage.py runserver
+```
+
+## Patched files in stratoflights
+
+To make this stack work we made one tiny change in stratoflights so the
+predictor endpoint is configurable:
+
+```python
+# stratoflights_api/services/tawhiri.py
+class TawhiriClient:
+    BASE_URL = os.getenv("TAWHIRI_BASE_URL", "https://fly.stratonautica.ru/api/v2/")
+```
+
+This is backwards-compatible — the default keeps the existing behavior.

jsconfig.json

@@ -3,6 +3,7 @@
 	"compilerOptions": {
 		"allowJs": true,
 		"checkJs": true,
+		"allowImportingTsExtensions": true,
 		"esModuleInterop": true,
 		"forceConsistentCasingInFileNames": true,
 		"resolveJsonModule": true,

mocks/data/points.json

@@ -0,0 +1,6 @@
+[
+	{ "id": 1, "name": "Якутск (аэропорт)", "lat": 62.0928, "lon": 129.7706, "alt": 99 },
+	{ "id": 2, "name": "Тикси", "lat": 71.6347, "lon": 128.8661, "alt": 11 },
+	{ "id": 3, "name": "Мирный", "lat": 62.5344, "lon": 113.9589, "alt": 346 },
+	{ "id": 4, "name": "Нерюнгри", "lat": 56.6588, "lon": 124.7181, "alt": 750 }
+]

mocks/data/scenarios.json

@@ -0,0 +1,22 @@
+[
+	{
+		"id": 101,
+		"name": "Стандартный 30 км",
+		"description": "Обычный полет со стандартным профилем",
+		"prediction_mode": "single",
+		"model": "gfs_0p25",
+		"dataset": "",
+		"flight_parameters": {
+			"ascent_rate": 5.0,
+			"burst_altitude": 30000.0,
+			"dataset": "",
+			"descent_rate": 5.0,
+			"format": "json",
+			"launch_altitude": 99.0,
+			"launch_latitude": 62.0928,
+			"launch_longitude": 129.7706,
+			"profile": "standard_profile",
+			"version": 2
+		}
+	}
+]

mocks/handlers/prediction.ts

@@ -0,0 +1,56 @@
+import type { FlightParameters } from '../../src/lib/domain/scenario';
+
+/**
+ * Generate a fake prediction trajectory. We fake an ascent phase that climbs
+ * to burst_altitude at ascent_rate, then a descent at descent_rate. The
+ * ground track drifts roughly east as a function of altitude to loosely
+ * mimic wind drift.
+ */
+export function fakePrediction(params: FlightParameters & { launch_datetime: string }) {
+	const launch = new Date(params.launch_datetime);
+	const ascentDurationSec = Math.round(
+		(params.burst_altitude - params.launch_altitude) / params.ascent_rate,
+	);
+	const descentDurationSec = Math.round(params.burst_altitude / params.descent_rate);
+	const stepSec = 30;
+
+	const ascent: unknown[] = [];
+	for (let t = 0; t <= ascentDurationSec; t += stepSec) {
+		const alt = params.launch_altitude + t * params.ascent_rate;
+		ascent.push({
+			altitude: alt,
+			datetime: new Date(launch.getTime() + t * 1000).toISOString(),
+			latitude: params.launch_latitude + t * 0.00002,
+			longitude: params.launch_longitude + t * 0.00005,
+		});
+	}
+
+	const descent: unknown[] = [];
+	const burstTime = launch.getTime() + ascentDurationSec * 1000;
+	const burstLat = params.launch_latitude + ascentDurationSec * 0.00002;
+	const burstLng = params.launch_longitude + ascentDurationSec * 0.00005;
+	for (let t = 0; t <= descentDurationSec; t += stepSec) {
+		const alt = Math.max(0, params.burst_altitude - t * params.descent_rate);
+		descent.push({
+			altitude: alt,
+			datetime: new Date(burstTime + t * 1000).toISOString(),
+			latitude: burstLat + t * 0.00001,
+			longitude: burstLng + t * 0.00003,
+		});
+	}
+
+	return {
+		result: {
+			metadata: {
+				start_datetime: new Date(launch.getTime() - 3600 * 1000).toISOString(),
+				complete_datetime: new Date(
+					burstTime + descentDurationSec * 1000,
+				).toISOString(),
+			},
+			prediction: [
+				{ stage: 'ascent', trajectory: ascent },
+				{ stage: 'descent', trajectory: descent },
+			],
+		},
+	};
+}

mocks/vitePlugin.ts

@@ -0,0 +1,200 @@
+import type { Connect, Plugin } from 'vite';
+import type { IncomingMessage, ServerResponse } from 'node:http';
+import { readFileSync, writeFileSync, existsSync, mkdirSync } from 'node:fs';
+import { join, dirname } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { fakePrediction } from './handlers/prediction';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const DATA_DIR = join(__dirname, 'data');
+
+/**
+ * Dev-only mock for the Django REST API. Enable by setting
+ * `VITE_USE_MOCK_API=true` when running `vite dev`.
+ *
+ * Covered endpoints (everything under /api/):
+ *   - GET/POST/PUT/DELETE /saved-points/…
+ *   - GET/POST/PUT/DELETE /saved-templates/…
+ *   - GET/POST/PUT/DELETE /saved-profiles/…
+ *   - POST /predictions/
+ *   - GET /session/, /whoami/, /csrf/
+ *   - POST /login/, /logout/
+ *
+ * State lives on disk so edits survive dev-server restarts.
+ */
+
+interface MockSession {
+	isAuthenticated: boolean;
+	username: string | null;
+}
+
+let session: MockSession = { isAuthenticated: true, username: 'demo-user' };
+
+function loadArray<T>(file: string, fallback: T[]): T[] {
+	const path = join(DATA_DIR, file);
+	if (!existsSync(path)) return fallback;
+	try {
+		return JSON.parse(readFileSync(path, 'utf-8')) as T[];
+	} catch {
+		return fallback;
+	}
+}
+
+function saveArray<T>(file: string, items: T[]): void {
+	if (!existsSync(DATA_DIR)) mkdirSync(DATA_DIR, { recursive: true });
+	writeFileSync(join(DATA_DIR, file), JSON.stringify(items, null, '\t'));
+}
+
+function send(res: ServerResponse, status: number, body: unknown) {
+	res.statusCode = status;
+	res.setHeader('Content-Type', 'application/json');
+	res.end(JSON.stringify(body));
+}
+
+function cors(res: ServerResponse, req: IncomingMessage) {
+	res.setHeader('Access-Control-Allow-Origin', req.headers.origin ?? '*');
+	res.setHeader('Access-Control-Allow-Credentials', 'true');
+	res.setHeader('Access-Control-Allow-Methods', 'GET,POST,PUT,DELETE,PATCH,OPTIONS');
+	res.setHeader('Access-Control-Allow-Headers', 'Content-Type, X-CSRFToken');
+}
+
+async function readBody(req: IncomingMessage): Promise<unknown> {
+	return await new Promise((resolve) => {
+		const chunks: Uint8Array[] = [];
+		req.on('data', (chunk: Uint8Array) => chunks.push(chunk));
+		req.on('end', () => {
+			const raw = Buffer.concat(chunks).toString('utf-8');
+			if (!raw) return resolve({});
+			try {
+				resolve(JSON.parse(raw));
+			} catch {
+				resolve({});
+			}
+		});
+	});
+}
+
+function crudEndpoint<T extends { id: number }>(
+	file: string,
+	path: string,
+): (req: IncomingMessage, res: ServerResponse) => Promise<boolean> {
+	return async (req, res) => {
+		const url = req.url ?? '';
+		if (!url.startsWith(path)) return false;
+
+		const remainder = url.slice(path.length);
+		const [idPart] = remainder.replace(/\/$/, '').split('?');
+		const id = idPart ? Number(idPart) : null;
+
+		let items = loadArray<T>(file, []);
+
+		switch (req.method) {
+			case 'GET':
+				if (id == null || Number.isNaN(id)) {
+					send(res, 200, items);
+				} else {
+					const item = items.find((i) => i.id === id);
+					item ? send(res, 200, item) : send(res, 404, { detail: 'not found' });
+				}
+				return true;
+			case 'POST': {
+				const body = (await readBody(req)) as Partial<T>;
+				const nextId = items.reduce((m, i) => Math.max(m, i.id), 0) + 1;
+				const created = { ...body, id: nextId } as T;
+				items = [...items, created];
+				saveArray(file, items);
+				send(res, 201, created);
+				return true;
+			}
+			case 'PUT': {
+				const body = (await readBody(req)) as T;
+				items = items.map((i) => (i.id === (id ?? body.id) ? body : i));
+				saveArray(file, items);
+				send(res, 200, body);
+				return true;
+			}
+			case 'DELETE':
+				items = items.filter((i) => i.id !== id);
+				saveArray(file, items);
+				res.statusCode = 204;
+				res.end();
+				return true;
+			default:
+				return false;
+		}
+	};
+}
+
+export function mockApiPlugin(): Plugin {
+	const handlers: Array<(req: IncomingMessage, res: ServerResponse) => Promise<boolean>> = [
+		crudEndpoint('points.json', '/api/saved-points/'),
+		crudEndpoint('scenarios.json', '/api/saved-templates/'),
+		crudEndpoint('profiles.json', '/api/saved-profiles/'),
+	];
+
+	const middleware: Connect.NextHandleFunction = async (req, res, next) => {
+		const url = req.url ?? '';
+		if (!url.startsWith('/api/')) return next();
+
+		cors(res, req);
+
+		if (req.method === 'OPTIONS') {
+			res.statusCode = 204;
+			res.end();
+			return;
+		}
+
+		if (url.startsWith('/api/csrf/')) {
+			res.setHeader('Set-Cookie', 'csrftoken=mock-csrf; Path=/');
+			send(res, 200, { detail: 'ok' });
+			return;
+		}
+
+		if (url.startsWith('/api/session/')) {
+			send(res, 200, { isAuthenticated: session.isAuthenticated });
+			return;
+		}
+
+		if (url.startsWith('/api/whoami/')) {
+			if (!session.username) return send(res, 401, { detail: 'not authenticated' });
+			send(res, 200, { username: session.username });
+			return;
+		}
+
+		if (url.startsWith('/api/login/')) {
+			const body = (await readBody(req)) as { username: string; password: string };
+			if (!body.username || !body.password) {
+				return send(res, 400, { detail: 'missing credentials' });
+			}
+			session = { isAuthenticated: true, username: body.username };
+			send(res, 200, { detail: 'ok', username: body.username });
+			return;
+		}
+
+		if (url.startsWith('/api/logout/')) {
+			session = { isAuthenticated: false, username: null };
+			send(res, 200, { detail: 'ok' });
+			return;
+		}
+
+		if (url.startsWith('/api/predictions/')) {
+			const body = (await readBody(req)) as Parameters<typeof fakePrediction>[0];
+			send(res, 200, fakePrediction(body));
+			return;
+		}
+
+		for (const h of handlers) {
+			if (await h(req, res)) return;
+		}
+
+		send(res, 404, { detail: 'mock: endpoint not implemented' });
+	};
+
+	return {
+		name: 'lsv-mock-api',
+		apply: 'serve',
+		configureServer(server) {
+			server.middlewares.use(middleware);
+		},
+	};
+}

package.json

@@ -1,5 +1,5 @@
 {
-	"name": "project",
+	"name": "app4",
 	"private": true,
 	"version": "0.0.1",
 	"type": "module",
@@ -9,19 +9,34 @@
 		"preview": "vite preview",
 		"prepare": "svelte-kit sync || echo ''",
 		"check": "svelte-kit sync && svelte-check --tsconfig ./jsconfig.json",
-		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./jsconfig.json --watch"
+		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./jsconfig.json --watch",
+		"test:e2e": "playwright test",
+		"test:e2e:headed": "playwright test --headed",
+		"test:e2e:ui": "playwright test --ui"
 	},
 	"devDependencies": {
-		"@sveltejs/adapter-auto": "^4.0.0",
+		"@playwright/test": "^1.59.1",
+		"@sveltejs/adapter-static": "^3.0.10",
 		"@sveltejs/kit": "^2.16.0",
 		"@sveltejs/vite-plugin-svelte": "^5.0.0",
-		"svelte": "^5.0.0",
+		"@types/luxon": "^3.6.2",
+		"@types/node": "^25.6.0",
+		"@vincjo/datatables": "^2.5.0",
+		"svelte": "^5.34.8",
 		"svelte-check": "^4.0.0",
 		"typescript": "^5.0.0",
-		"vite": "^6.0.0"
+		"vite": "^6.2.5"
 	},
 	"dependencies": {
-		"leaflet": "^1.9.4",
-		"svelte-map-leaflet": "^0.5.0"
+		"@sakitam-gis/maplibre-wind": "^2.0.3",
+		"@sveltestrap/sveltestrap": "^7.1.0",
+		"bootstrap-icons": "^1.13.1",
+		"chart.js": "^4.5.0",
+		"chartjs-adapter-luxon": "^1.3.1",
+		"chartjs-plugin-dragdata": "^2.3.1",
+		"js-cookie": "^3.0.5",
+		"luxon": "^3.6.1",
+		"maplibre-gl": "^4.0.0",
+		"svelte5-chartjs": "^1.0.0"
 	}
 }

playwright.config.ts

@@ -0,0 +1,48 @@
+import { defineConfig, devices } from '@playwright/test';
+
+/**
+ * Playwright configuration.
+ *
+ * Tests run against the Vite dev server with the mock API enabled, so they
+ * don't require Django to be running. Each test gets an isolated user session
+ * via the `storageState` reset in globalSetup (implicit: every test starts
+ * with a blank context).
+ *
+ * Run:
+ *   npx playwright install chromium   # first time only — installs browsers
+ *   npm run test:e2e                  # headless
+ *   npm run test:e2e:headed           # opens a browser
+ *   npm run test:e2e:ui               # Playwright UI mode
+ */
+export default defineConfig({
+	testDir: './tests/e2e',
+	timeout: 30_000,
+	expect: { timeout: 5_000 },
+	fullyParallel: false, // the mock plugin writes to shared JSON files on disk
+	workers: 1,
+	forbidOnly: !!process.env.CI,
+	retries: process.env.CI ? 1 : 0,
+	reporter: [['list'], ['html', { open: 'never' }]],
+	use: {
+		baseURL: 'http://127.0.0.1:5173',
+		trace: 'retain-on-failure',
+		video: 'retain-on-failure',
+		screenshot: 'only-on-failure',
+	},
+	projects: [
+		{
+			name: 'chromium',
+			use: { ...devices['Desktop Chrome'] },
+		},
+	],
+	webServer: {
+		command: 'npm run dev -- --port 5173 --strictPort',
+		url: 'http://127.0.0.1:5173',
+		reuseExistingServer: !process.env.CI,
+		timeout: 60_000,
+		env: {
+			VITE_USE_MOCK_API: 'true',
+			VITE_API_BASE_URL: '/api',
+		},
+	},
+});

resume

@@ -0,0 +1 @@
+claude --resume 0ed44ce1-31ba-4b4e-b975-387a4b2ae13d

scripts/run-stack.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+# Boot the full leaflet_svelte ↔ stratoflights ↔ predictor test stack.
+#
+# Processes started (background):
+#   - fake_tawhiri (Python http.server, :8001)   — synthesizes prediction responses
+#   - stratoflights Django (runserver, :8000)    — API backend, talks to fake_tawhiri
+#   - leaflet_svelte Vite dev server (:5173)     — proxies /api to Django
+#
+# After this, run tests with:
+#   npm run test:e2e
+#
+# Stop everything with:
+#   scripts/stop-stack.sh
+#
+# Requirements (once):
+#   - Python deps: pip install --user --break-system-packages Django djangorestframework \
+#       djangorestframework-simplejwt drf-spectacular requests django-cors-headers \
+#       Pillow python-dotenv channels daphne
+#   - `demo` user in Django with password `demo`:
+#       DJANGO_ENV=production python3 manage.py createsuperuser (--noinput with env)
+set -euo pipefail
+
+FRONTEND_DIR=/home/anton/leaflet_svelte
+BACKEND_DIR=/home/anton/stratoflights
+PID_DIR=/tmp/lsv-stack
+mkdir -p "$PID_DIR"
+
+# --- fake_tawhiri ----------------------------------------------------------------
+if ! ss -tlnp 2>/dev/null | grep -q ':8001'; then
+	echo "starting fake_tawhiri on :8001"
+	python3 "$FRONTEND_DIR/tests/e2e/fake_tawhiri.py" > /tmp/fake-tawhiri.log 2>&1 &
+	echo $! > "$PID_DIR/fake-tawhiri.pid"
+fi
+
+# --- stratoflights Django --------------------------------------------------------
+if ! ss -tlnp 2>/dev/null | grep -q ':8000'; then
+	echo "starting stratoflights on :8000"
+	cd "$BACKEND_DIR"
+	DJANGO_ENV=production \
+	DEBUG=True \
+	ALLOWED_HOSTS=localhost,127.0.0.1 \
+	CSRF_TRUSTED_ORIGINS="http://localhost:5173,http://localhost:8000,http://127.0.0.1:5173,http://127.0.0.1:8000" \
+	TAWHIRI_BASE_URL=http://127.0.0.1:8001/api/v2/ \
+		python3 manage.py runserver 0.0.0.0:8000 > /tmp/django.log 2>&1 &
+	echo $! > "$PID_DIR/django.pid"
+	sleep 3
+fi
+
+# --- leaflet_svelte --------------------------------------------------------------
+if ! ss -tlnp 2>/dev/null | grep -q ':5173'; then
+	echo "starting Vite on :5173"
+	cd "$FRONTEND_DIR"
+	VITE_USE_MOCK_API=false \
+	VITE_API_BASE_URL=/api \
+	VITE_API_PROXY_TARGET=http://localhost:8000 \
+		npm run dev -- --port 5173 --strictPort > /tmp/vite-dev.log 2>&1 &
+	echo $! > "$PID_DIR/vite.pid"
+	sleep 3
+fi
+
+echo "--- stack ready ---"
+echo "  fake_tawhiri:    http://127.0.0.1:8001/api/v2/"
+echo "  stratoflights:   http://localhost:8000/api/"
+echo "  leaflet_svelte:  http://localhost:5173/"
+echo
+echo "logs:   /tmp/fake-tawhiri.log, /tmp/django.log, /tmp/vite-dev.log"
+echo "run e2e: (cd $FRONTEND_DIR && npm run test:e2e)"
+echo "stop:    $FRONTEND_DIR/scripts/stop-stack.sh"

scripts/stop-stack.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+# Stop everything started by run-stack.sh.
+set -u
+
+PID_DIR=/tmp/lsv-stack
+
+for name in fake-tawhiri django vite; do
+	pidfile="$PID_DIR/$name.pid"
+	if [[ -f "$pidfile" ]]; then
+		pid=$(cat "$pidfile")
+		if kill "$pid" 2>/dev/null; then
+			echo "stopped $name (pid $pid)"
+		fi
+		rm -f "$pidfile"
+	fi
+done
+
+# Belt-and-suspenders: free ports if anything slipped through.
+for port in 5173 8000 8001; do
+	fuser -k "$port/tcp" 2>/dev/null && echo "freed :$port" || true
+done

src/app.css

@@ -1,3 +1,153 @@
-@tailwind base;
-@tailwind components;
-@tailwind utilities;
+/* Custom YKS brand-themed Bootstrap 5.2.3 is served from /css/bootstrap.min.css
+ * (see static/css/bootstrap.min.css). It carries the brand palette
+ * (--bs-primary: #457aab, etc.) that stock Bootstrap doesn't.
+ */
+@import '/css/bootstrap.min.css';
+@import 'bootstrap-icons/font/bootstrap-icons.css';
+
+/*
+ * Global application styles.
+ *
+ * Keep this file focused on cross-feature concerns: the navbar chrome, the
+ * panel-container geometry, and overrides for third-party libs (MapLibre,
+ * Bootstrap). Feature-specific styles live in the relevant Svelte component.
+ */
+
+:root {
+	--navbar-height: 44px;
+	--panel-left: 20px;
+	--panel-top: 20px;
+}
+
+body {
+	background-color: #f5f5f5;
+	min-height: 100vh;
+	display: flex;
+	flex-direction: column;
+}
+
+.custom-navbar {
+	height: var(--navbar-height);
+	padding: 0;
+	z-index: 1002;
+	border: none;
+	background-color: white !important;
+}
+
+.nav-full-height.nav-link {
+	color: inherit;
+	padding: 12px 1rem 0 1rem !important;
+	background-color: white;
+	margin-right: -1px;
+}
+
+.nav-full-height.nav-link:hover,
+.nav-full-height.nav-link.active {
+	color: white !important;
+	background-color: var(--bs-primary);
+}
+
+.nav-full-height {
+	display: flex;
+	align-items: center;
+	height: 100%;
+}
+
+.navbar-brand {
+	margin-right: 1em;
+}
+
+.navbar {
+	z-index: 1002;
+}
+
+.card {
+	transition: all 0.3s ease;
+}
+.card-header {
+	cursor: pointer;
+}
+
+.map-container {
+	position: relative;
+	width: 100%;
+	height: calc(100vh - var(--navbar-height));
+}
+
+.panel-container-left,
+.panel-container-right {
+	position: absolute;
+	top: var(--panel-top);
+	width: 23rem;
+	max-height: calc(100vh - var(--navbar-height) - 2 * var(--panel-top));
+	max-width: calc(100vw - var(--panel-left) * 2);
+	overflow-y: auto;
+	z-index: 1001;
+}
+
+.panel-container-left {
+	left: var(--panel-left);
+}
+
+.panel-container-right {
+	right: var(--panel-left);
+}
+
+.maplibregl-ctrl-group {
+	border: var(--bs-border-width) var(--bs-border-style) var(--bs-border-color) !important;
+	border-radius: var(--bs-border-radius) !important;
+}
+
+.maplibregl-popup-tip {
+	border-top-color: var(--bs-border-color) !important;
+}
+
+.maplibregl-popup-content {
+	background-color: var(--bs-body-bg) !important;
+	border: var(--bs-border-width) var(--bs-border-style) var(--bs-border-color) !important;
+	border-radius: var(--bs-border-radius) !important;
+	color: var(--bs-body-color);
+	box-shadow: none !important;
+}
+
+.maplibregl-popup-close-button {
+	color: var(--bs-body-color);
+}
+
+.modal-backdrop {
+	opacity: var(--bs-backdrop-opacity) !important;
+}
+
+.table td.fit,
+.table th.fit {
+	white-space: nowrap;
+	width: 1%;
+}
+
+.force-page-height {
+	min-height: 100vh;
+	display: flex;
+	flex-direction: column;
+}
+
+.modal-tinted {
+	filter: brightness(0.6);
+}
+
+.dropdown-toggle-standalone::after {
+	margin-left: 0;
+}
+
+.lsv-measure-dot {
+	background: var(--bs-primary);
+	border-radius: 50%;
+	border: 2px solid white;
+	box-shadow: 0 0 0 1px var(--bs-primary);
+}
+
+@media (max-width: 767.98px) {
+	.panel-container-left,
+	.panel-container-right {
+		width: calc(100vw - var(--panel-left) * 2);
+	}
+}

src/lib/api/client.ts

@@ -0,0 +1,123 @@
+import Cookies from 'js-cookie';
+
+/**
+ * Thin wrapper around fetch that:
+ *  - prepends the configured API base URL
+ *  - includes Django session cookies
+ *  - attaches the CSRF token from cookies
+ *  - parses structured DRF errors into a single ApiError
+ *
+ * The 401 handler is pluggable (see `setUnauthorizedHandler`) so the auth
+ * layer can react (clear session, route to /login) without this module
+ * importing from $auth (which would create a cycle).
+ *
+ * Default base URL is the relative path `/api` so the app works out of the
+ * box against either the Vite dev proxy, the mock plugin, or a same-origin
+ * production deployment. Set VITE_API_BASE_URL to point directly at a
+ * cross-origin backend if needed.
+ */
+
+export const API_BASE_URL = import.meta.env.VITE_API_BASE_URL ?? '/api';
+
+export class ApiError extends Error {
+	constructor(
+		public status: number,
+		message: string,
+		public details?: unknown,
+	) {
+		super(message);
+		this.name = 'ApiError';
+	}
+}
+
+type UnauthorizedHandler = () => void;
+let onUnauthorized: UnauthorizedHandler | null = null;
+export function setUnauthorizedHandler(fn: UnauthorizedHandler | null) {
+	onUnauthorized = fn;
+}
+
+async function ensureCsrf(): Promise<string> {
+	const existing = Cookies.get('csrftoken');
+	if (existing) return existing;
+
+	await fetch(`${API_BASE_URL}/csrf/`, { method: 'GET', credentials: 'include' });
+	return Cookies.get('csrftoken') ?? '';
+}
+
+function extractError(body: unknown, fallback: string): string {
+	if (body && typeof body === 'object') {
+		const b = body as Record<string, unknown>;
+		if (typeof b.detail === 'string') return b.detail;
+		if (b.non_field_errors && Array.isArray(b.non_field_errors)) {
+			return b.non_field_errors.join(', ');
+		}
+		if (b.field_errors && typeof b.field_errors === 'object') {
+			return Object.values(b.field_errors as Record<string, unknown>)
+				.flat()
+				.join(', ');
+		}
+	}
+	return fallback;
+}
+
+export interface RequestOptions extends Omit<RequestInit, 'body'> {
+	body?: unknown;
+	query?: Record<string, string | number | boolean | undefined>;
+}
+
+function buildUrl(path: string, query?: RequestOptions['query']): string {
+	let url = `${API_BASE_URL}${path}`;
+	if (!query) return url;
+	const params = new URLSearchParams();
+	for (const [k, v] of Object.entries(query)) {
+		if (v !== undefined) params.set(k, String(v));
+	}
+	const qs = params.toString();
+	if (qs) url += (url.includes('?') ? '&' : '?') + qs;
+	return url;
+}
+
+export async function request<T>(path: string, options: RequestOptions = {}): Promise<T> {
+	const csrf = await ensureCsrf();
+
+	const init: RequestInit = {
+		...options,
+		credentials: 'include',
+		headers: {
+			'Content-Type': 'application/json',
+			'X-CSRFToken': csrf,
+			...options.headers,
+		},
+		body: options.body !== undefined ? JSON.stringify(options.body) : undefined,
+	};
+
+	const res = await fetch(buildUrl(path, options.query), init);
+
+	if (res.status === 401) onUnauthorized?.();
+
+	if (!res.ok) {
+		let body: unknown = null;
+		try {
+			body = await res.json();
+		} catch {
+			// ignore
+		}
+		throw new ApiError(res.status, extractError(body, res.statusText), body);
+	}
+
+	if (res.status === 204) return undefined as T;
+	return (await res.json()) as T;
+}
+
+export const api = {
+	get: <T>(path: string, options?: RequestOptions) =>
+		request<T>(path, { ...options, method: 'GET' }),
+	post: <T>(path: string, body?: unknown, options?: RequestOptions) =>
+		request<T>(path, { ...options, method: 'POST', body }),
+	put: <T>(path: string, body?: unknown, options?: RequestOptions) =>
+		request<T>(path, { ...options, method: 'PUT', body }),
+	patch: <T>(path: string, body?: unknown, options?: RequestOptions) =>
+		request<T>(path, { ...options, method: 'PATCH', body }),
+	delete: <T>(path: string, options?: RequestOptions) =>
+		request<T>(path, { ...options, method: 'DELETE' }),
+};

src/lib/api/index.ts

@@ -0,0 +1,5 @@
+export { api, ApiError, API_BASE_URL, setUnauthorizedHandler } from './client';
+export { pointsApi } from './points';
+export { profilesApi } from './profiles';
+export { scenariosApi } from './scenarios';
+export { predictionsApi, getLatestDataset, buildLaunchDateTime } from './predictions';

src/lib/api/points.ts

@@ -0,0 +1,11 @@
+import { api } from './client';
+import type { SavedPoint } from '$domain';
+
+const base = '/saved-points/';
+
+export const pointsApi = {
+	list: () => api.get<SavedPoint[]>(base),
+	create: (p: SavedPoint) => api.post<SavedPoint>(base, p),
+	update: (p: SavedPoint) => api.put<SavedPoint>(`${base}${p.id}/`, p),
+	delete: (id: number) => api.delete<void>(`${base}${id}/`),
+};

src/lib/api/predictions.ts

@@ -0,0 +1,34 @@
+import { api } from './client';
+import type { FlightParameters, RawPrediction } from '$domain';
+
+/**
+ * GFS datasets are published every 6 hours with a ~6 hour processing lag.
+ * Round down to the most recent available slot.
+ */
+export function getLatestDataset(now: Date = new Date()): string {
+	const rounded = new Date(now);
+	rounded.setUTCHours(Math.floor(rounded.getUTCHours() / 6) * 6, 0, 0, 0);
+	rounded.setUTCHours(rounded.getUTCHours() - 6);
+	return rounded.toISOString();
+}
+
+export function buildLaunchDateTime(date: string, time: string): string {
+	const fullTime = time.split(':').length === 2 ? `${time}:00` : time;
+	return new Date(`${date}T${fullTime}Z`).toISOString();
+}
+
+export interface PredictionResponse {
+	result: RawPrediction;
+}
+
+export const predictionsApi = {
+	run: (params: FlightParameters, launchDateTime: string) => {
+		const payload: FlightParameters & { launch_datetime: string } = {
+			...params,
+			dataset: params.dataset || getLatestDataset(),
+			launch_datetime: launchDateTime,
+		};
+		if (payload.start_point === -1) delete payload.start_point;
+		return api.post<PredictionResponse>('/predictions/', payload);
+	},
+};

src/lib/api/profiles.ts

@@ -0,0 +1,11 @@
+import { api } from './client';
+import type { SavedFlightProfile } from '$domain';
+
+const base = '/saved-profiles/';
+
+export const profilesApi = {
+	list: () => api.get<SavedFlightProfile[]>(base),
+	create: (p: SavedFlightProfile) => api.post<SavedFlightProfile>(base, p),
+	update: (p: SavedFlightProfile) => api.put<SavedFlightProfile>(`${base}${p.id}/`, p),
+	delete: (id: number) => api.delete<void>(`${base}${id}/`),
+};

src/lib/api/scenarios.ts

@@ -0,0 +1,11 @@
+import { api } from './client';
+import type { SavedScenario } from '$domain';
+
+const base = '/saved-templates/';
+
+export const scenariosApi = {
+	list: () => api.get<SavedScenario[]>(base),
+	create: (s: SavedScenario) => api.post<SavedScenario>(base, s),
+	update: (s: SavedScenario) => api.put<SavedScenario>(`${base}${s.id}/`, s),
+	delete: (id: number) => api.delete<void>(`${base}${id}/`),
+};

src/lib/auth/api.ts

@@ -0,0 +1,17 @@
+import { api } from '$api';
+
+export interface SessionInfo {
+	isAuthenticated: boolean;
+}
+
+export interface WhoAmI {
+	username: string;
+}
+
+export const authApi = {
+	session: () => api.get<SessionInfo>('/session/'),
+	whoami: () => api.get<WhoAmI>('/whoami/'),
+	login: (username: string, password: string) =>
+		api.post<{ detail?: string }>('/login/', { username, password }),
+	logout: () => api.post<void>('/logout/', {}),
+};

src/lib/auth/guard.ts

@@ -0,0 +1,32 @@
+import { goto } from '$app/navigation';
+import { get } from 'svelte/store';
+import { authStore } from './store';
+
+/**
+ * Await a non-`unknown` auth status, refreshing from the server if needed.
+ * Use inside a `+page.svelte` onMount — not inside load functions, since auth
+ * depends on browser cookies and we run SPA-only.
+ */
+export async function requireAuthenticated(redirectTo = '/login'): Promise<boolean> {
+	let state = authStore.snapshot();
+	if (state.status === 'unknown') state = await authStore.refresh();
+	if (state.status !== 'authenticated') {
+		await goto(redirectTo);
+		return false;
+	}
+	return true;
+}
+
+export async function requireAnonymous(redirectTo = '/'): Promise<boolean> {
+	let state = authStore.snapshot();
+	if (state.status === 'unknown') state = await authStore.refresh();
+	if (state.status === 'authenticated') {
+		await goto(redirectTo);
+		return false;
+	}
+	return true;
+}
+
+export function currentUser(): string | null {
+	return get(authStore).username;
+}

src/lib/auth/index.ts

@@ -0,0 +1,3 @@
+export { authStore, type AuthState, type AuthStatus } from './store';
+export { authApi } from './api';
+export { requireAuthenticated, requireAnonymous, currentUser } from './guard';

src/lib/auth/store.ts

@@ -0,0 +1,79 @@
+import { writable, get } from 'svelte/store';
+import { goto } from '$app/navigation';
+import { setUnauthorizedHandler } from '$api';
+import { authApi } from './api';
+
+/**
+ * Authentication state is intentionally held here rather than in a plain
+ * writable so the guard and the UI share a single refresh path.
+ *
+ * `status` transitions: `unknown` → `anonymous` | `authenticated`.
+ * Tests or code that assumes a route is available should wait for a terminal
+ * status (anything != `unknown`) before deciding what to do.
+ */
+
+export type AuthStatus = 'unknown' | 'anonymous' | 'authenticated';
+
+export interface AuthState {
+	status: AuthStatus;
+	username: string | null;
+}
+
+const initial: AuthState = { status: 'unknown', username: null };
+
+function createAuthStore() {
+	const { subscribe, set, update } = writable<AuthState>(initial);
+
+	async function refresh(): Promise<AuthState> {
+		try {
+			const session = await authApi.session();
+			if (!session.isAuthenticated) {
+				const next: AuthState = { status: 'anonymous', username: null };
+				set(next);
+				return next;
+			}
+			const me = await authApi.whoami();
+			const next: AuthState = { status: 'authenticated', username: me.username };
+			set(next);
+			return next;
+		} catch {
+			const next: AuthState = { status: 'anonymous', username: null };
+			set(next);
+			return next;
+		}
+	}
+
+	async function login(username: string, password: string) {
+		await authApi.login(username, password);
+		await refresh();
+	}
+
+	async function logout() {
+		try {
+			await authApi.logout();
+		} finally {
+			set({ status: 'anonymous', username: null });
+		}
+	}
+
+	function snapshot(): AuthState {
+		return get({ subscribe });
+	}
+
+	return { subscribe, refresh, login, logout, snapshot };
+}
+
+export const authStore = createAuthStore();
+
+// Wire API 401s back through the auth store so expired sessions redirect once.
+let redirecting = false;
+setUnauthorizedHandler(() => {
+	authStore.refresh();
+	if (redirecting) return;
+	if (typeof window === 'undefined') return;
+	if (window.location.pathname === '/login') return;
+	redirecting = true;
+	goto('/login').finally(() => {
+		redirecting = false;
+	});
+});

src/lib/domain/geo.ts

@@ -0,0 +1,33 @@
+/**
+ * Geographic primitives used by map layers and predictions.
+ *
+ * LngLat convention matches MapLibre (longitude first) for on-map work;
+ * LatLng is preserved for API payloads and legacy Leaflet-era code paths.
+ */
+
+export interface LatLng {
+	lat: number;
+	lng: number;
+	alt?: number;
+}
+
+export type LatLngTuple = [lat: number, lng: number] | [lat: number, lng: number, alt: number];
+
+export type LatLngExpression = LatLng | LatLngTuple;
+
+export type LngLatTuple = [lng: number, lat: number];
+
+export function toLngLat(p: LatLngExpression): LngLatTuple {
+	if (Array.isArray(p)) return [p[1], p[0]];
+	return [p.lng, p.lat];
+}
+
+export function toLatLng(p: LatLngExpression): LatLng {
+	if (Array.isArray(p)) return { lat: p[0], lng: p[1], alt: p[2] };
+	return p;
+}
+
+export function normalizeLng(lng: number): number {
+	// API occasionally returns longitudes in the 0..360 range.
+	return lng > 180 ? lng - 360 : lng;
+}

src/lib/domain/index.ts

@@ -0,0 +1,5 @@
+export * from './geo';
+export * from './math';
+export * from './scenario';
+export * from './prediction';
+export * from './telemetry';

src/lib/domain/math.ts

@@ -0,0 +1,34 @@
+import type { LatLng } from './geo';
+
+const EARTH_RADIUS_KM = 6371;
+
+const toRad = (deg: number): number => (deg * Math.PI) / 180;
+const toDeg = (rad: number): number => (rad * 180) / Math.PI;
+
+export function distHaversine(p1: LatLng, p2: LatLng, precision?: number): number {
+	const dLat = toRad(p2.lat - p1.lat);
+	const dLng = toRad(p2.lng - p1.lng);
+
+	const a =
+		Math.sin(dLat / 2) ** 2 +
+		Math.cos(toRad(p1.lat)) * Math.cos(toRad(p2.lat)) * Math.sin(dLng / 2) ** 2;
+
+	const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
+	const d = EARTH_RADIUS_KM * c;
+
+	return precision !== undefined ? parseFloat(d.toFixed(precision)) : d;
+}
+
+export function bearingHaversine(p1: LatLng, p2: LatLng): number {
+	const dLng = toRad(p2.lng - p1.lng);
+	const y = Math.sin(dLng) * Math.cos(toRad(p2.lat));
+	const x =
+		Math.cos(toRad(p1.lat)) * Math.sin(toRad(p2.lat)) -
+		Math.sin(toRad(p1.lat)) * Math.cos(toRad(p2.lat)) * Math.cos(dLng);
+	return toDeg(Math.atan2(y, x));
+}
+
+export function toFixedNumber(num: number, digits: number): number {
+	const pow = 10 ** digits;
+	return Math.round(num * pow) / pow;
+}

src/lib/domain/prediction.ts

@@ -0,0 +1,73 @@
+import type { LatLngTuple, LatLng } from './geo';
+import { normalizeLng } from './geo';
+
+export interface Point {
+	latlng: LatLng;
+	datetime: Date;
+}
+
+export interface TrajectoryPoint {
+	altitude: number;
+	datetime: string;
+	latitude: number;
+	longitude: number;
+}
+
+export interface PredictionStage {
+	stage: string;
+	trajectory: TrajectoryPoint[];
+}
+
+export interface PredictionMetadata {
+	complete_datetime: string;
+	start_datetime: string;
+}
+
+export interface RawPrediction {
+	metadata: PredictionMetadata;
+	prediction: PredictionStage[];
+}
+
+export interface Prediction {
+	flight_path: LatLngTuple[];
+	launch: Point;
+	burst: Point;
+	landing: Point;
+	profile: string;
+	flight_time: number;
+}
+
+function pointFromTrajectory(tp: TrajectoryPoint): Point {
+	return {
+		latlng: { lat: tp.latitude, lng: normalizeLng(tp.longitude), alt: tp.altitude },
+		datetime: new Date(tp.datetime),
+	};
+}
+
+/**
+ * Fold a raw prediction response (stages → trajectory) into a flat Prediction
+ * with derived launch/burst/landing markers and a single flight_path array.
+ */
+export function parsePrediction(stages: PredictionStage[]): Prediction {
+	if (stages.length < 2) {
+		throw new Error('Prediction requires at least ascent and descent stages');
+	}
+
+	const ascent = stages[0].trajectory;
+	const descent = stages[1].trajectory;
+
+	const flight_path: LatLngTuple[] = [...ascent, ...descent].map((p) => [
+		p.latitude,
+		normalizeLng(p.longitude),
+		p.altitude,
+	]);
+
+	const launch = pointFromTrajectory(ascent[0]);
+	const burst = pointFromTrajectory(descent[0]);
+	const landing = pointFromTrajectory(descent[descent.length - 1]);
+
+	const profile = stages[1].stage === 'descent' ? 'standard_profile' : 'float_profile';
+	const flight_time = (landing.datetime.getTime() - launch.datetime.getTime()) / 1000;
+
+	return { flight_path, launch, burst, landing, profile, flight_time };
+}

src/lib/domain/scenario.ts

@@ -0,0 +1,92 @@
+/**
+ * Scenario-related domain types.
+ *
+ * A scenario is a named prediction configuration a user saves and reapplies.
+ * Scenarios are composed of "flight parameters" plus dataset/model metadata.
+ *
+ * Identifiers (`standard_profile` etc.) are the canonical form. Localized
+ * labels live in `$i18n/locales` — do not use the `PROFILE_NAMES` here for
+ * UI text; look up the i18n key `domain.profile.<identifier>`.
+ */
+
+export const PROFILE_IDENTIFIERS = [
+	'standard_profile',
+	'float_profile',
+	'reverse_profile',
+	'custom_profile',
+] as const;
+export type ProfileIdentifier = (typeof PROFILE_IDENTIFIERS)[number];
+
+export const PREDICTION_MODES = ['single', 'hourly', 'ensemble'] as const;
+export type PredictionMode = (typeof PREDICTION_MODES)[number];
+
+export interface FlightParameters {
+	ascent_rate: number;
+	burst_altitude: number;
+	dataset: string;
+	descent_rate: number;
+	format: 'json';
+	launch_altitude: number;
+	launch_latitude: number;
+	launch_longitude: number;
+	profile: ProfileIdentifier;
+	version: number;
+	start_point?: number;
+	rate_profile?: number;
+	template?: number;
+}
+
+export interface SavedPoint {
+	id: number;
+	name: string;
+	lat: number;
+	lon: number;
+	alt: number;
+}
+
+export interface RateCurvePoint {
+	order: number;
+	time_constraint: number;
+	alt_constraint: number;
+	rate: number;
+}
+
+export interface SavedFlightProfile {
+	id: number;
+	name: string;
+	type?: string;
+	rate_profile_data: RateCurvePoint[];
+}
+
+export interface SavedScenario {
+	id: number;
+	name: string;
+	description: string;
+	prediction_mode: string;
+	model: string;
+	dataset: string;
+	flight_parameters: FlightParameters;
+}
+
+export const DEFAULT_FLIGHT_PARAMETERS: FlightParameters = {
+	ascent_rate: 5.0,
+	burst_altitude: 30000.0,
+	dataset: '',
+	descent_rate: 5.0,
+	format: 'json',
+	launch_altitude: 0.0,
+	launch_latitude: 62.1234,
+	launch_longitude: 129.1234,
+	profile: 'standard_profile',
+	version: 2,
+};
+
+export const DEFAULT_SCENARIO: SavedScenario = {
+	id: -1,
+	name: 'Новый сценарий',
+	description: '',
+	prediction_mode: 'single',
+	model: '',
+	dataset: '',
+	flight_parameters: DEFAULT_FLIGHT_PARAMETERS,
+};

src/lib/domain/telemetry.ts

@@ -0,0 +1,41 @@
+import type { LatLngTuple } from './geo';
+import type { Point } from './prediction';
+
+export interface TelemetryPoint {
+	altitude: number;
+	datetime: string;
+	latitude: number;
+	longitude: number;
+	payload: string;
+}
+
+export interface TelemetryMetadata {
+	complete_datetime: string;
+	start_datetime: string;
+}
+
+export interface RawTelemetry {
+	metadata: TelemetryMetadata;
+	telemetry: TelemetryPoint[];
+}
+
+export interface Telemetry {
+	flight_path: LatLngTuple[];
+	launch: Point;
+	datapoints: TelemetryPoint[];
+}
+
+export function parseTelemetry(points: TelemetryPoint[]): Telemetry {
+	if (points.length === 0) {
+		throw new Error('Telemetry requires at least one datapoint');
+	}
+
+	const flight_path: LatLngTuple[] = points.map((p) => [p.latitude, p.longitude, p.altitude]);
+
+	const launch: Point = {
+		latlng: { lat: points[0].latitude, lng: points[0].longitude, alt: points[0].altitude },
+		datetime: new Date(points[0].datetime),
+	};
+
+	return { flight_path, launch, datapoints: points };
+}

src/lib/features/auth/LoginForm.svelte

@@ -0,0 +1,80 @@
+<script lang="ts">
+	import { goto } from '$app/navigation';
+	import { authStore } from '$auth';
+	import { t } from '$i18n';
+
+	let username = $state('');
+	let password = $state('');
+	let error = $state('');
+	let isLoading = $state(false);
+
+	async function handleLogin(e: Event) {
+		e.preventDefault();
+		if (!username || !password) {
+			error = $t('login.fieldsRequired');
+			return;
+		}
+		isLoading = true;
+		error = '';
+		try {
+			await authStore.login(username, password);
+			goto('/');
+		} catch (err: unknown) {
+			error = (err as Error).message || $t('login.invalidCredentials');
+		} finally {
+			isLoading = false;
+		}
+	}
+</script>
+
+<main class="container pt-3">
+	<div class="text-center mt-5 mb-4">
+		<img src="/logo-lg.svg" alt="Logo" width="300" class="rounded-3" />
+		<h2 class="text-center mt-4 mb-5">{$t('app.title')}</h2>
+	</div>
+	<div class="row">
+		<div class="col-12 col-md-6 col-lg-4 offset-md-3 offset-lg-4">
+			<div class="card">
+				<div class="card-body">
+					<h5 class="card-title">{$t('login.heading')}</h5>
+
+					{#if error}
+						<div class="alert alert-danger mb-4" role="alert">{error}</div>
+					{/if}
+
+					<form onsubmit={handleLogin} class="mt-4">
+						<div class="form-floating mb-3">
+							<input
+								type="text"
+								class="form-control"
+								id="username"
+								placeholder={$t('login.username')}
+								bind:value={username}
+								required />
+							<label for="username">{$t('login.username')}</label>
+						</div>
+						<div class="form-floating mb-3">
+							<input
+								type="password"
+								class="form-control"
+								id="password"
+								placeholder={$t('login.password')}
+								bind:value={password}
+								required />
+							<label for="password">{$t('login.password')}</label>
+						</div>
+						<button type="submit" class="btn btn-primary w-100" disabled={isLoading}>
+							{#if isLoading}
+								<span class="spinner-border spinner-border-sm" role="status"></span>
+								{$t('login.submitting')}
+							{:else}
+								{$t('login.submit')}
+							{/if}
+						</button>
+						<a href="/" class="btn btn-secondary mt-3 w-100">{$t('login.back')}</a>
+					</form>
+				</div>
+			</div>
+		</div>
+	</div>
+</main>

src/lib/features/auth/Navbar.svelte

@@ -0,0 +1,80 @@
+<script lang="ts">
+	import { page } from '$app/stores';
+	import {
+		Collapse,
+		Dropdown,
+		DropdownItem,
+		DropdownMenu,
+		DropdownToggle,
+		Nav,
+		NavItem,
+		NavLink,
+		Navbar,
+		NavbarBrand,
+		NavbarToggler,
+	} from '@sveltestrap/sveltestrap';
+	import { authStore } from '$auth';
+	import { goto } from '$app/navigation';
+	import { t } from '$i18n';
+
+	// Auth is already refreshed by the root layout before this mounts.
+	let isOpen = $state(false);
+
+	async function handleLogout() {
+		await authStore.logout();
+		goto('/');
+	}
+</script>
+
+<Navbar color="light" light expand="lg" fixed="top" class="custom-navbar border-bottom">
+	<NavbarBrand href="/" class="nav-full-height">
+		<img src="/logo.svg" alt="Logo" height="34" class="d-inline-block align-text-top" />
+	</NavbarBrand>
+	<NavbarToggler on:click={() => (isOpen = !isOpen)} />
+	<Collapse {isOpen} navbar expand="lg">
+		<Nav class="me-auto mb-lg-0" navbar>
+			<NavItem>
+				<NavLink
+					href="/predict"
+					class="nav-full-height border border-top-0"
+					active={$page.url.pathname === '/predict'}>
+					{$t('nav.predict')}
+				</NavLink>
+			</NavItem>
+			<NavItem>
+				<NavLink
+					href="/track"
+					class="nav-full-height border border-top-0"
+					active={$page.url.pathname === '/track'}>
+					{$t('nav.track')}
+				</NavLink>
+			</NavItem>
+		</Nav>
+		<Nav navbar>
+			{#if $authStore.status === 'authenticated' && $authStore.username}
+				<Dropdown nav inNavbar>
+					<DropdownToggle nav caret class="nav-full-height border border-top-0">
+						{$authStore.username}
+					</DropdownToggle>
+					<DropdownMenu end>
+						<DropdownItem href="/user/account">{$t('nav.account')}</DropdownItem>
+						<DropdownItem href="/user/templates">{$t('nav.scenarios')}</DropdownItem>
+						<DropdownItem href="/user/predictions">{$t('nav.predictionHistory')}</DropdownItem>
+						<DropdownItem href="/user/flights">{$t('nav.trackingHistory')}</DropdownItem>
+						<DropdownItem divider />
+						<DropdownItem on:click={handleLogout}>{$t('nav.logout')}</DropdownItem>
+					</DropdownMenu>
+				</Dropdown>
+			{:else if $authStore.status === 'anonymous'}
+				<NavItem>
+					<NavLink
+						href="/login"
+						class="nav-full-height border border-top-0"
+						active={$page.url.pathname === '/login'}>
+						{$t('nav.login')}
+					</NavLink>
+				</NavItem>
+			{/if}
+		</Nav>
+	</Collapse>
+</Navbar>

src/lib/features/auth/index.ts

@@ -0,0 +1,2 @@
+export { default as Navbar } from './Navbar.svelte';
+export { default as LoginForm } from './LoginForm.svelte';

src/lib/features/footer/Footer.svelte

@@ -0,0 +1,25 @@
+<script lang="ts">
+	import { t } from '$i18n';
+</script>
+
+<footer class="bg-dark text-bg-dark mt-auto">
+	<div class="container pt-5">
+		<div class="row gy-5">
+			<div class="col-lg-3 mw-lg-2">
+				<div class="mb-4">
+					<a class="navbar-brand" href="/">
+						<img src="/logo-full-ru-dark.svg" class="img-fluid" alt={$t('app.company')} width="250" />
+					</a>
+				</div>
+			</div>
+			<div class="col-lg-8 offset-lg-1"></div>
+		</div>
+	</div>
+	<div class="container pb-4">
+		<div class="row">
+			<div class="col-6 small">
+				<div>Copyright © 2024 {$t('app.company')}</div>
+			</div>
+		</div>
+	</div>
+</footer>

src/lib/features/footer/index.ts

@@ -0,0 +1 @@
+export { default as Footer } from './Footer.svelte';

src/lib/features/prediction/ControlPanel.svelte

@@ -0,0 +1,342 @@
+<script lang="ts">
+	/*
+	 * Conventions (apply to every .svelte file under features/):
+	 *   - $state variables: camelCase, no prefix.
+	 *   - $derived: camelCase.
+	 *   - Component refs: camelCase + Ref.
+	 *   - Event handlers: handleXxx.
+	 *   - Prop callbacks: onXxx.
+	 *   - HTML IDs: kebab-case, prefixed with a component-specific short code
+	 *     (e.g. "cp-..." for ControlPanel) so IDs stay globally unique.
+	 */
+	import { onMount } from 'svelte';
+	import {
+		Button,
+		Dropdown,
+		DropdownItem,
+		DropdownMenu,
+		DropdownToggle,
+		FormGroup,
+		Icon,
+		Input,
+		InputGroup,
+		InputGroupText,
+		Label,
+	} from '@sveltestrap/sveltestrap';
+	import { CollapsibleCard, SelectSearchable, SpoilerGroup, addToast } from '$ui';
+	import { pointsApi } from '$api';
+	import {
+		DEFAULT_FLIGHT_PARAMETERS,
+		PROFILE_IDENTIFIERS,
+		toFixedNumber,
+		type FlightParameters,
+		type ProfileIdentifier,
+		type SavedPoint,
+	} from '$domain';
+	import { workspacesStore, getActiveWorkspace } from '$features/workspaces';
+	import { t } from '$i18n';
+	import { pointsStore } from './pointsStore';
+	import PointEditor from './PointEditor.svelte';
+	import CurveEditor from './CurveEditor.svelte';
+
+	interface Props {
+		onSelectOnMapClick?: () => void;
+	}
+	let { onSelectOnMapClick = () => {} }: Props = $props();
+
+	let pointEditorRef: PointEditor | null = $state(null);
+	let curveEditorRef: CurveEditor | null = $state(null);
+
+	let active = $derived(getActiveWorkspace($workspacesStore));
+	let params = $derived<FlightParameters>(active?.flightParameters ?? DEFAULT_FLIGHT_PARAMETERS);
+	let ascentProfile = $state('standard');
+	let descentProfile = $state('standard');
+	let selectedPointId = $derived(params.start_point ?? -1);
+
+	let currentPoint = $derived($pointsStore.find((p) => p.id === selectedPointId) ?? null);
+	let isPointDirty = $derived.by(() => {
+		if (!currentPoint) return false;
+		return (
+			params.launch_latitude.toFixed(6) !== currentPoint.lat.toFixed(6) ||
+			params.launch_longitude.toFixed(6) !== currentPoint.lon.toFixed(6) ||
+			params.launch_altitude.toFixed(2) !== currentPoint.alt.toFixed(2)
+		);
+	});
+
+	onMount(async () => {
+		if ($pointsStore.length === 0) {
+			try {
+				pointsStore.set(await pointsApi.list());
+			} catch (err: unknown) {
+				addToast({ header: $t('common.error'), body: (err as Error).message, color: 'danger' });
+			}
+		}
+	});
+
+	function patchActive(patch: Partial<FlightParameters>) {
+		if (!active) return;
+		workspacesStore.setFlightParameters(active.id, { ...active.flightParameters, ...patch });
+	}
+
+	function handlePointSelection(newPointId: number | null) {
+		if (!active) return;
+		if (newPointId == null || newPointId === -1) {
+			patchActive({ start_point: -1 });
+			return;
+		}
+		const point = $pointsStore.find((p) => p.id === newPointId);
+		if (!point) return;
+		patchActive({
+			start_point: point.id,
+			launch_latitude: point.lat,
+			launch_longitude: point.lon,
+			launch_altitude: point.alt,
+		});
+	}
+
+	async function handleSaveCurrentPoint() {
+		if (!currentPoint) {
+			pointEditorRef?.open(
+				{
+					id: 0,
+					name: `New Point ${new Date().toLocaleString()}`,
+					lat: params.launch_latitude,
+					lon: params.launch_longitude,
+					alt: params.launch_altitude,
+				},
+				false,
+			);
+			return;
+		}
+		try {
+			const saved = await pointsApi.update({
+				...currentPoint,
+				lat: params.launch_latitude,
+				lon: params.launch_longitude,
+				alt: params.launch_altitude,
+			});
+			pointsStore.update((list) => list.map((p) => (p.id === saved.id ? saved : p)));
+			addToast({ header: $t('common.success'), body: saved.name, color: 'success' });
+		} catch (err: unknown) {
+			addToast({ header: $t('common.error'), body: (err as Error).message, color: 'danger' });
+		}
+	}
+
+	async function handleRun() {
+		if (!active) return;
+		try {
+			await workspacesStore.run(active.id);
+			addToast({
+				header: $t('forecast.success'),
+				body: $t('forecast.successBody'),
+				color: 'success',
+			});
+		} catch (err: unknown) {
+			addToast({
+				header: $t('forecast.error'),
+				body: $t('forecast.errorBody', { error: (err as Error).message }),
+				color: 'danger',
+			});
+		}
+	}
+
+	export function updateLaunchPosition(lat: number, lng: number) {
+		patchActive({
+			launch_latitude: toFixedNumber(lat, 6),
+			launch_longitude: toFixedNumber(lng, 6),
+		});
+	}
+</script>
+
+<CollapsibleCard title={$t('conditions.title')}>
+	{#if !active}
+		<div class="text-muted small">{$t('workspaces.empty')}</div>
+	{:else}
+		<div class="d-flex gap-2">
+			<FormGroup class="flex-fill w-50" spacing="mb-2">
+				<Label for="cp-start-time" class="form-label">{$t('conditions.startTime')}</Label>
+				<Input
+					type="time"
+					id="cp-start-time"
+					class="form-control-sm"
+					step="1"
+					value={active.launchTime}
+					oninput={(e) =>
+						workspacesStore.patch(active!.id, {
+							launchTime: (e.currentTarget as HTMLInputElement).value,
+						})} />
+			</FormGroup>
+			<FormGroup class="flex-fill w-50" spacing="mb-2">
+				<Label for="cp-start-date" class="form-label">{$t('conditions.startDate')}</Label>
+				<Input
+					type="date"
+					id="cp-start-date"
+					class="form-control-sm"
+					value={active.launchDate}
+					oninput={(e) =>
+						workspacesStore.patch(active!.id, {
+							launchDate: (e.currentTarget as HTMLInputElement).value,
+						})} />
+			</FormGroup>
+		</div>
+
+		<FormGroup spacing="mb-2">
+			<Label for="cp-flight-profile" class="form-label">{$t('conditions.flightProfile')}</Label>
+			<InputGroup size="sm">
+				<Input
+					type="select"
+					id="cp-flight-profile"
+					value={params.profile}
+					onchange={(e) =>
+						patchActive({
+							profile: (e.currentTarget as HTMLSelectElement).value as ProfileIdentifier,
+						})}>
+					{#each PROFILE_IDENTIFIERS as id}
+						<option value={id}>{$t(`profile.${id}`)}</option>
+					{/each}
+				</Input>
+			</InputGroup>
+		</FormGroup>
+
+		<FormGroup spacing="mb-2">
+			<Label for="cp-start-point" class="form-label">{$t('conditions.startPoint')}</Label>
+			<InputGroup size="sm">
+				<SelectSearchable
+					style="min-height: calc(1.5em + .5rem + 2px); padding: .25rem .5rem; font-size: .875rem;"
+					id="cp-start-point"
+					selected={selectedPointId}
+					onChange={handlePointSelection}
+					options={$pointsStore.map((p) => ({
+						value: p.id,
+						label: `${p.name}${p.id === selectedPointId && isPointDirty ? ` (${$t('scenario.modified')})` : ''}`,
+					}))}
+					placeholder={$t('conditions.pointPlaceholder')}
+					searchPlaceholder={$t('conditions.pointSearchPlaceholder')}
+					clearable={true} />
+				<Button color="secondary" size="sm" onclick={() => pointEditorRef?.open(null, true)}>
+					<Icon name="journal-bookmark-fill" />
+				</Button>
+			</InputGroup>
+		</FormGroup>
+
+		<FormGroup spacing="mb-2">
+			<Label class="form-label">{$t('conditions.latLng')}</Label>
+			<InputGroup size="sm">
+				<Input
+					type="number"
+					step="0.000001"
+					value={params.launch_latitude}
+					oninput={(e) =>
+						patchActive({
+							launch_latitude: parseFloat((e.currentTarget as HTMLInputElement).value),
+						})} />
+				<InputGroupText>/</InputGroupText>
+				<Input
+					type="number"
+					step="0.000001"
+					value={params.launch_longitude}
+					oninput={(e) =>
+						patchActive({
+							launch_longitude: parseFloat((e.currentTarget as HTMLInputElement).value),
+						})} />
+				<Button color="secondary" size="sm" onclick={onSelectOnMapClick}>
+					<Icon name="geo-alt-fill" />
+				</Button>
+			</InputGroup>
+		</FormGroup>
+
+		<div class="d-flex mb-2">
+			<Button
+				color="primary"
+				class="flex-fill"
+				size="sm"
+				onclick={handleSaveCurrentPoint}
+				disabled={!isPointDirty && selectedPointId !== -1}>
+				{$t('conditions.save')}
+				<Icon name="floppy2-fill" class="ms-1" />
+			</Button>
+		</div>
+
+		<div class="d-flex gap-2">
+			<FormGroup class="flex-fill w-50" spacing="mb-2">
+				<Label class="form-label">{$t('conditions.launchAlt')}</Label>
+				<Input
+					type="number"
+					class="form-control-sm"
+					value={params.launch_altitude}
+					oninput={(e) =>
+						patchActive({
+							launch_altitude: parseFloat((e.currentTarget as HTMLInputElement).value),
+						})} />
+			</FormGroup>
+			<FormGroup class="flex-fill w-50" spacing="mb-2">
+				<Label class="form-label">{$t('conditions.burstAlt')}</Label>
+				<Input
+					type="number"
+					class="form-control-sm"
+					value={params.burst_altitude}
+					oninput={(e) =>
+						patchActive({
+							burst_altitude: parseFloat((e.currentTarget as HTMLInputElement).value),
+						})} />
+			</FormGroup>
+		</div>
+
+		{#if params.profile !== 'custom_profile'}
+			<div class="mb-2 d-flex gap-2">
+				<FormGroup class="flex-fill w-50" spacing="mb-2">
+					<Label class="form-label">{$t('conditions.ascentRate')}</Label>
+					<Input
+						type="number"
+						class="form-control-sm"
+						value={params.ascent_rate}
+						oninput={(e) =>
+							patchActive({
+								ascent_rate: parseFloat((e.currentTarget as HTMLInputElement).value),
+							})} />
+				</FormGroup>
+				<FormGroup class="flex-fill w-50" spacing="mb-2">
+					<Label class="form-label">{$t('conditions.descentRate')}</Label>
+					<Input
+						type="number"
+						class="form-control-sm"
+						value={params.descent_rate}
+						oninput={(e) =>
+							patchActive({
+								descent_rate: parseFloat((e.currentTarget as HTMLInputElement).value),
+							})} />
+				</FormGroup>
+			</div>
+		{:else}
+			<SpoilerGroup label={$t('conditions.profileEdit')} class="mb-2">
+				<Label class="form-label mb-0">{$t('conditions.ascentStage')}</Label>
+				<div class="d-flex gap-2 mb-0">
+					<Input type="radio" bind:group={ascentProfile} value="none" label={$t('conditions.stageNone')} />
+					<Input type="radio" bind:group={ascentProfile} value="standard" label={$t('conditions.stageStandard')} />
+					<Input type="radio" bind:group={ascentProfile} value="custom" label={$t('conditions.stageCustom')} />
+				</div>
+				<Label class="form-label mb-0">{$t('conditions.descentStage')}</Label>
+				<div class="d-flex gap-2 mb-0">
+					<Input type="radio" bind:group={descentProfile} value="none" label={$t('conditions.stageNone')} />
+					<Input type="radio" bind:group={descentProfile} value="standard" label={$t('conditions.stageStandard')} />
+					<Input type="radio" bind:group={descentProfile} value="custom" label={$t('conditions.stageCustom')} />
+				</div>
+				<Button size="sm" color="secondary" onclick={() => curveEditorRef?.openModal()} class="w-100">
+					{$t('conditions.openCurveEditor')}
+					<Icon name="graph-up-arrow" />
+				</Button>
+			</SpoilerGroup>
+		{/if}
+
+		<div class="d-flex">
+			<Button class="flex-fill" size="sm" color="primary" onclick={handleRun}>
+				{$t('conditions.run')}
+			</Button>
+		</div>
+	{/if}
+</CollapsibleCard>
+
+<CurveEditor bind:this={curveEditorRef} showTable={true} editor={false} />
+<PointEditor
+	bind:this={pointEditorRef}
+	onSelectPoint={(p: SavedPoint | null) => handlePointSelection(p?.id ?? -1)} />

src/lib/features/prediction/CurveChart.svelte

@@ -0,0 +1,144 @@
+<script lang="ts">
+	import { onMount, onDestroy } from 'svelte';
+	import { Chart as ChartJS, type TooltipItem } from 'chart.js/auto';
+	import 'chartjs-adapter-luxon';
+	import chartjsPluginDragdata from 'chartjs-plugin-dragdata';
+	import { DateTime } from 'luxon';
+	import type { RateCurvePoint, SavedFlightProfile } from '$domain';
+
+	ChartJS.register(chartjsPluginDragdata);
+
+	interface Props {
+		curve: SavedFlightProfile;
+		onUpdate: (points: RateCurvePoint[]) => void;
+	}
+	let { curve, onUpdate }: Props = $props();
+
+	let canvasEl: HTMLCanvasElement;
+	// eslint-disable-next-line @typescript-eslint/no-explicit-any
+	let chart: any = $state(null);
+
+	const chartData = $derived(calculateChartData(curve.rate_profile_data));
+
+	/**
+	 * Fold relative constraints into absolute (time, altitude) segments.
+	 * Each point declares either a time constraint, an altitude constraint,
+	 * or both (minimum of the two wins).
+	 */
+	function calculateChartData(points: RateCurvePoint[]) {
+		const data: { x: number; y: number }[] = [{ x: 0, y: 0 }];
+		let currentTime = 0;
+		let currentAltitude = 0;
+
+		for (const point of points) {
+			const { time_constraint, alt_constraint, rate } = point;
+			let resolved = 0;
+
+			if (time_constraint !== -1) {
+				if (alt_constraint !== -1) {
+					const timeForAlt = rate !== 0 ? (alt_constraint - currentAltitude) / rate : 0;
+					resolved = Math.min(time_constraint, timeForAlt);
+				} else {
+					resolved = time_constraint;
+				}
+			} else if (alt_constraint !== -1) {
+				resolved = rate !== 0 ? (alt_constraint - currentAltitude) / rate : 0;
+			}
+
+			if (resolved < 0) resolved = 0;
+			currentTime += resolved;
+			currentAltitude += resolved * rate;
+
+			data.push({ x: currentTime, y: currentAltitude });
+		}
+		return data;
+	}
+
+	function updateChart() {
+		if (!chart) return;
+		chart.data.datasets[0].data = chartData;
+		chart.update('none');
+	}
+
+	function handleDragEnd(
+		_e: unknown,
+		_datasetIndex: number,
+		index: number,
+		value: { x: number; y: number },
+	) {
+		if (index === 0) {
+			updateChart();
+			return;
+		}
+		const prevX = chartData[index - 1].x;
+		const nextX = chartData[index + 1]?.x ?? Infinity;
+		if (value.x <= prevX || value.x >= nextX) {
+			updateChart();
+			return;
+		}
+
+		const newPoints: RateCurvePoint[] = JSON.parse(JSON.stringify(curve.rate_profile_data));
+		const point = newPoints[index - 1];
+		const prev = chartData[index - 1];
+
+		const newDuration = value.x - prev.x;
+		const newAltDiff = value.y - prev.y;
+
+		if (point.alt_constraint !== -1) point.alt_constraint = Math.round(value.y);
+		if (point.time_constraint !== -1) point.time_constraint = Math.round(newDuration);
+
+		point.rate = newDuration > 0 ? parseFloat((newAltDiff / newDuration).toFixed(2)) : 0;
+		onUpdate(newPoints);
+	}
+
+	onMount(() => {
+		const ctx = canvasEl.getContext('2d');
+		if (!ctx) return;
+		chart = new ChartJS(ctx, {
+			type: 'line',
+			data: {
+				datasets: [
+					{
+						label: 'Altitude profile',
+						data: chartData,
+						borderColor: 'rgb(75, 192, 192)',
+						backgroundColor: 'rgba(75, 192, 192, 0.5)',
+						fill: false,
+						pointRadius: 5,
+						pointHoverRadius: 7,
+					},
+				],
+			},
+			options: {
+				responsive: true,
+				maintainAspectRatio: false,
+				scales: {
+					x: { type: 'linear', position: 'bottom', title: { display: true, text: 't, sec' } },
+					y: { title: { display: true, text: 'altitude, m' } },
+				},
+				plugins: {
+					// eslint-disable-next-line @typescript-eslint/no-explicit-any
+				dragData: { round: 0, onDragEnd: handleDragEnd as any, dragX: true },
+					tooltip: {
+						callbacks: {
+							label: (c: TooltipItem<'line'>) => {
+								const t = DateTime.fromSeconds(c.parsed.x ?? 0).toFormat('HH:mm:ss');
+								return `${c.parsed.y?.toFixed(0)} m @ ${t}`;
+							},
+						},
+					},
+				},
+			},
+		});
+	});
+
+	$effect(() => {
+		if (chart) updateChart();
+	});
+
+	onDestroy(() => chart?.destroy());
+</script>
+
+<div style="position: relative; height: 100%; min-height: 250px;">
+	<canvas bind:this={canvasEl}></canvas>
+</div>

src/lib/features/prediction/CurveEditor.svelte

@@ -0,0 +1,338 @@
+<script lang="ts">
+	import {
+		Modal,
+		Button,
+		Label,
+		Input,
+		Alert,
+		Icon,
+		Pagination,
+		PaginationItem,
+		PaginationLink,
+		InputGroup,
+		Table,
+	} from '@sveltestrap/sveltestrap';
+	import { TableHandler } from '@vincjo/datatables';
+	import { onMount } from 'svelte';
+	import { EditableCell, addToast, ConfirmationPrompt } from '$ui';
+	import { profilesApi } from '$api';
+	import type { RateCurvePoint, SavedFlightProfile } from '$domain';
+	import { profilesStore } from './pointsStore';
+	import CurveChart from './CurveChart.svelte';
+
+	interface Props {
+		isOpen?: boolean;
+		onClose?: () => void;
+		onSave?: (p: SavedFlightProfile) => void;
+		onSelectCurve?: (p: SavedFlightProfile) => void;
+		showTable?: boolean;
+		curve?: SavedFlightProfile | null;
+		editor?: boolean;
+		closeOnSave?: boolean;
+		closeOnDelete?: boolean;
+	}
+
+	let {
+		isOpen = $bindable(false),
+		onClose = () => {},
+		onSave = (_: SavedFlightProfile) => {},
+		onSelectCurve = (_: SavedFlightProfile) => {},
+		showTable = $bindable(false),
+		curve = null,
+		editor = false,
+		closeOnSave = false,
+		closeOnDelete = false,
+	}: Props = $props();
+
+	let selectedCurve = $state<SavedFlightProfile | null>(curve);
+	let draft = $state<SavedFlightProfile>({ id: 0, name: '', rate_profile_data: [] });
+	let newPoint = $state<RateCurvePoint>({ order: 0, time_constraint: 0, alt_constraint: 0, rate: 0 });
+	let isEditing = $state(editor);
+	let alertText = $state('');
+	let isConfirmationVisible = $state(false);
+
+	let table = $derived(new TableHandler($profilesStore, { rowsPerPage: 5 }));
+	let search = $derived(table.createSearch(['name']));
+
+	$effect(() => {
+		if (editor && curve) {
+			selectedCurve = curve;
+			draft = { ...curve, rate_profile_data: [...curve.rate_profile_data] };
+			isEditing = true;
+		}
+	});
+
+	function sortByOrder() {
+		draft.rate_profile_data = [...draft.rate_profile_data].sort((a, b) => a.order - b.order);
+	}
+
+	onMount(async () => {
+		if (showTable && $profilesStore.length === 0) {
+			try {
+				profilesStore.set(await profilesApi.list());
+			} catch {
+				// ignore; saved profiles endpoint may not be active in dev
+			}
+		}
+	});
+
+	export function openModal(withTable = false) {
+		showTable = withTable;
+		isOpen = true;
+	}
+
+	function close() {
+		isOpen = false;
+		onClose();
+	}
+
+	function handleEdit(c: SavedFlightProfile) {
+		selectedCurve = c;
+		draft = { ...c, rate_profile_data: [...c.rate_profile_data] };
+		isEditing = true;
+		showTable = false;
+	}
+
+	function confirmDelete(c: SavedFlightProfile) {
+		selectedCurve = c;
+		isConfirmationVisible = true;
+	}
+
+	async function handleDelete() {
+		if (!selectedCurve) return;
+		try {
+			await profilesApi.delete(selectedCurve.id);
+			profilesStore.update((items) => items.filter((p) => p.id !== selectedCurve!.id));
+			if (closeOnDelete) close();
+		} catch (err: unknown) {
+			alertText = (err as Error).message;
+		}
+	}
+
+	async function handleSave() {
+		try {
+			const saved =
+				draft.id && draft.id > 0 ? await profilesApi.update(draft) : await profilesApi.create(draft);
+			profilesStore.update((items) => {
+				const exists = items.some((p) => p.id === saved.id);
+				return exists ? items.map((p) => (p.id === saved.id ? saved : p)) : [...items, saved];
+			});
+			addToast({ header: 'Curve saved', body: saved.name, color: 'success' });
+			if (closeOnSave) close();
+			onSave(saved);
+		} catch (err: unknown) {
+			alertText = (err as Error).message;
+		}
+	}
+
+	function validatePoint(point: RateCurvePoint): boolean {
+		if (point.time_constraint <= 0 && point.time_constraint !== -1) {
+			alertText = 'Time constraint invalid';
+			return false;
+		}
+		if (point.alt_constraint < 0 && point.alt_constraint !== -1) {
+			alertText = 'Altitude constraint invalid';
+			return false;
+		}
+		if (point.alt_constraint === -1 && point.time_constraint === -1) {
+			alertText = 'At least one constraint required';
+			return false;
+		}
+		return true;
+	}
+
+	function addPoint() {
+		if (!validatePoint(newPoint)) return;
+		const maxOrder = draft.rate_profile_data.reduce((m, p) => Math.max(m, p.order), -1);
+		draft.rate_profile_data = [...draft.rate_profile_data, { ...newPoint, order: maxOrder + 1 }];
+		newPoint = { order: 0, time_constraint: 0, alt_constraint: 0, rate: 0 };
+		alertText = '';
+	}
+
+	function removePoint(index: number) {
+		draft.rate_profile_data.splice(index, 1);
+		draft.rate_profile_data.forEach((p, i) => (p.order = i));
+		draft.rate_profile_data = [...draft.rate_profile_data];
+	}
+
+	function movePoint(index: number, direction: number) {
+		const target = index + direction;
+		if (target < 0 || target >= draft.rate_profile_data.length) return;
+		const t = draft.rate_profile_data[index].order;
+		draft.rate_profile_data[index].order = draft.rate_profile_data[target].order;
+		draft.rate_profile_data[target].order = t;
+		sortByOrder();
+	}
+</script>
+
+<Modal
+	{isOpen}
+	toggle={close}
+	size="xl"
+	fade={false}
+	scrollable
+	class={isConfirmationVisible ? 'modal-tinted' : ''}>
+	<div class="modal-header">
+		<h5 class="modal-title">{showTable ? 'Curves' : isEditing ? 'Edit Curve' : 'New Curve'}</h5>
+		<Button close onclick={close} />
+	</div>
+	<div class="modal-body">
+		{#if showTable}
+			<InputGroup class="mb-2">
+				<Input
+					type="text"
+					placeholder="Search..."
+					bind:value={search.value}
+					oninput={() => search.set()} />
+				<Button
+					onclick={() => {
+						search.value = '';
+						search.set();
+					}}>
+					<Icon name="x" />
+				</Button>
+			</InputGroup>
+			<div bind:this={table.element} class="table-responsive">
+				<Table class="table-sm mb-0">
+					<thead>
+						<tr><th style="width: 70%;">Name</th><th>Actions</th></tr>
+					</thead>
+					<tbody>
+						{#each table.rows as c (c.id)}
+							<tr>
+								<td>{c.name}</td>
+								<td>
+									<Button size="sm" color="primary" onclick={() => onSelectCurve(c)}>
+										<Icon name="check-lg" />
+									</Button>
+									<Button size="sm" color="secondary" onclick={() => handleEdit(c)} class="ms-1">
+										<Icon name="pencil" />
+									</Button>
+									<Button size="sm" color="danger" onclick={() => confirmDelete(c)} class="ms-1">
+										<Icon name="trash" />
+									</Button>
+								</td>
+							</tr>
+						{/each}
+					</tbody>
+				</Table>
+			</div>
+			<Pagination size="sm">
+				<PaginationItem>
+					<PaginationLink previous onclick={() => table.setPage('previous')} />
+				</PaginationItem>
+				{#each table.pagesWithEllipsis as page}
+					<PaginationItem active={table.currentPage === page}>
+						<PaginationLink onclick={() => table.setPage(page)}>{page}</PaginationLink>
+					</PaginationItem>
+				{/each}
+				<PaginationItem>
+					<PaginationLink next onclick={() => table.setPage('next')} />
+				</PaginationItem>
+			</Pagination>
+		{:else}
+			<div class="row">
+				<div class="col-lg-6">
+					<div class="mb-2">
+						<Label class="small">Curve name</Label>
+						<Input class="form-control-sm" type="text" bind:value={draft.name} required />
+					</div>
+					<h6>Points</h6>
+					<Alert color="danger" isOpen={!!alertText} toggle={() => (alertText = '')} fade={false} class="mb-2">
+						<Icon name="exclamation-triangle" class="me-2" />
+						{alertText}
+					</Alert>
+					<div class="table-responsive small" style="max-height: 300px;">
+						<table class="table table-sm border mb-0">
+							<thead>
+								<tr>
+									<th></th>
+									<th>t, sec</th>
+									<th>alt, m</th>
+									<th>rate, m/s</th>
+									<th></th>
+								</tr>
+							</thead>
+							<tbody>
+								{#each draft.rate_profile_data as point, i (point.order)}
+									{@const isFirst = i === 0}
+									{@const isLast = i === draft.rate_profile_data.length - 1}
+									<tr>
+										<td>
+											<Button
+												size="sm"
+												class="p-0 border-0 bg-transparent"
+												onclick={() => movePoint(i, -1)}
+												disabled={isFirst}>
+												<Icon name="chevron-up" />
+											</Button>
+											<Button
+												size="sm"
+												class="p-0 border-0 bg-transparent"
+												onclick={() => movePoint(i, 1)}
+												disabled={isLast}>
+												<Icon name="chevron-down" />
+											</Button>
+										</td>
+										<EditableCell
+											bind:value={point.time_constraint}
+											onchange={() => (draft.rate_profile_data = [...draft.rate_profile_data])}
+											valueSuffix=" s"
+											emptyValue={-1} />
+										<EditableCell
+											bind:value={point.alt_constraint}
+											onchange={() => (draft.rate_profile_data = [...draft.rate_profile_data])}
+											valueSuffix=" m"
+											emptyValue={-1} />
+										<EditableCell
+											bind:value={point.rate}
+											onchange={() => (draft.rate_profile_data = [...draft.rate_profile_data])}
+											valueSuffix=" m/s" />
+										<td>
+											<Button size="sm" color="danger" onclick={() => removePoint(i)} class="p-0 border-0 bg-transparent">
+												<Icon name="trash" />
+											</Button>
+										</td>
+									</tr>
+								{:else}
+									<tr><td colspan="5" class="text-center text-muted">No points yet</td></tr>
+								{/each}
+							</tbody>
+							<tfoot>
+								<tr>
+									<td></td>
+									<td><Input class="form-control-sm" type="number" placeholder="t" bind:value={newPoint.time_constraint} /></td>
+									<td><Input class="form-control-sm" type="number" placeholder="alt" bind:value={newPoint.alt_constraint} /></td>
+									<td><Input class="form-control-sm" type="number" placeholder="rate" bind:value={newPoint.rate} /></td>
+									<td>
+										<Button size="sm" color="success" onclick={addPoint} class="p-0 border-0 bg-transparent">Add</Button>
+									</td>
+								</tr>
+							</tfoot>
+						</table>
+					</div>
+				</div>
+				<div class="col-lg-6">
+					<CurveChart curve={draft} onUpdate={(pts) => (draft.rate_profile_data = pts)} />
+				</div>
+			</div>
+			<hr />
+			<div class="d-grid gap-2 d-md-flex justify-content-end">
+				<Button color="success" size="sm" onclick={handleSave}>
+					{isEditing ? 'Update' : 'Save'}
+				</Button>
+			</div>
+		{/if}
+	</div>
+</Modal>
+
+<ConfirmationPrompt
+	bind:isOpen={isConfirmationVisible}
+	title="Confirm deletion"
+	confirmText="Delete"
+	cancelText="Cancel"
+	confirmVariant="danger"
+	onconfirm={handleDelete}
+	oncancel={() => (isConfirmationVisible = false)}>
+	<p>Delete curve "{selectedCurve?.name}"?</p>
+</ConfirmationPrompt>

src/lib/features/prediction/PointEditor.svelte

@@ -0,0 +1,140 @@
+<script lang="ts">
+	import { onMount } from 'svelte';
+	import { FormGroup, Label, Input } from '@sveltestrap/sveltestrap';
+	import type { SavedPoint } from '$domain';
+	import { pointsApi } from '$api';
+	import { addToast, ListEditor } from '$ui';
+	import type { ListEditorApi, ListEditorConfig } from '$ui';
+	import { t } from '$i18n';
+	import { pointsStore } from './pointsStore';
+
+	interface Props {
+		isOpen?: boolean;
+		onClose?: () => void;
+		onSave?: (p: SavedPoint) => void;
+		onSelectPoint?: (p: SavedPoint | null) => void;
+		point?: SavedPoint | null;
+	}
+
+	let {
+		isOpen = $bindable(false),
+		onClose = () => {},
+		onSave = (_: SavedPoint) => {},
+		onSelectPoint = (_: SavedPoint | null) => {},
+		point = null,
+	}: Props = $props();
+
+	let editorRef: ListEditor<SavedPoint> | null = $state(null);
+
+	onMount(async () => {
+		if ($pointsStore.length === 0) {
+			try {
+				pointsStore.set(await pointsApi.list());
+			} catch (err: unknown) {
+				addToast({
+					header: $t('common.error'),
+					body: (err as Error).message,
+					color: 'danger',
+				});
+			}
+		}
+	});
+
+	$effect(() => {
+		if (point && editorRef) editorRef.open(point);
+	});
+
+	const config: ListEditorConfig = {
+		showTable: true,
+		closeOnSave: false,
+		closeOnDelete: false,
+		searchBy: ['name'],
+		labels: {
+			item: 'Point',
+			itemGenitive: 'point',
+			items: 'Points',
+			add: 'Add',
+			edit: 'Edit',
+			save: 'Save',
+			update: 'Update',
+			delete: 'Delete',
+			cancel: 'Cancel',
+			close: 'Close',
+			searchPlaceholder: 'Search by name...',
+		},
+	};
+
+	const api: ListEditorApi<SavedPoint> = {
+		save: (p) => pointsApi.create(p),
+		update: (p) => pointsApi.update(p),
+		delete: (p) => pointsApi.delete(p.id),
+	};
+
+	const factory = (): SavedPoint => ({ id: 0, name: '', lat: 0, lon: 0, alt: 0 });
+
+	let items = $state<SavedPoint[]>($pointsStore);
+
+	$effect(() => {
+		items = $pointsStore;
+	});
+
+	$effect(() => {
+		pointsStore.set(items);
+	});
+
+	export function open(p: SavedPoint | null = null, showTable: boolean = config.showTable ?? true) {
+		editorRef?.open(p, showTable);
+	}
+</script>
+
+<ListEditor
+	bind:this={editorRef}
+	bind:isOpen
+	bind:items
+	{api}
+	{config}
+	itemFactory={factory}
+	onClose={() => onClose()}
+	onSave={(p) => onSave(p)}
+	onSelect={(p) => onSelectPoint(p)}>
+	{#snippet tableHeader()}
+		<tr>
+			<th>{$t('points.name')}</th>
+			<th>{$t('points.lat')}</th>
+			<th>{$t('points.lon')}</th>
+			<th>{$t('points.alt')}</th>
+			<th class="fit"></th>
+		</tr>
+	{/snippet}
+
+	{#snippet tableRow({ row })}
+		<td>{row.name}</td>
+		<td>{row.lat.toFixed(5)} °</td>
+		<td>{row.lon.toFixed(5)} °</td>
+		<td>{row.alt} м</td>
+	{/snippet}
+
+	{#snippet formFields({ item })}
+		<div class="mb-2">
+			<Label class="small">{$t('points.name')}</Label>
+			<Input class="form-control-sm" type="text" bind:value={item.name} required />
+		</div>
+		<div class="d-flex gap-2">
+			<FormGroup class="flex-grow-1">
+				<Label class="small">{$t('points.lat')}</Label>
+				<Input class="form-control-sm" type="number" step="any" bind:value={item.lat} required />
+				<span class="form-text">{$t('points.degrees')}</span>
+			</FormGroup>
+			<FormGroup class="flex-grow-1">
+				<Label class="small">{$t('points.lon')}</Label>
+				<Input class="form-control-sm" type="number" step="any" bind:value={item.lon} required />
+				<span class="form-text">{$t('points.degrees')}</span>
+			</FormGroup>
+			<FormGroup class="flex-grow-1">
+				<Label class="small">{$t('points.alt')}</Label>
+				<Input class="form-control-sm" type="number" step="any" bind:value={item.alt} required />
+				<span class="form-text">{$t('points.metersAsl')}</span>
+			</FormGroup>
+		</div>
+	{/snippet}
+</ListEditor>

src/lib/features/prediction/ScenarioEditor.svelte

@@ -0,0 +1,83 @@
+<script lang="ts">
+	import { Modal, Button, Alert, Icon, Input, Label } from '@sveltestrap/sveltestrap';
+	import { scenariosApi } from '$api';
+	import { DEFAULT_SCENARIO, type FlightParameters, type SavedScenario } from '$domain';
+	import { addToast } from '$ui';
+	import { t } from '$i18n';
+
+	interface Props {
+		isOpen?: boolean;
+		onSaved?: (s: SavedScenario) => void;
+	}
+
+	let { isOpen = $bindable(false), onSaved = (_: SavedScenario) => {} }: Props = $props();
+
+	let draft = $state<SavedScenario>({ ...DEFAULT_SCENARIO, id: 0 });
+	let alertText = $state('');
+
+	export function openCreate(flightParameters: FlightParameters) {
+		draft = {
+			...DEFAULT_SCENARIO,
+			id: 0,
+			name: '',
+			flight_parameters: flightParameters,
+		};
+		alertText = '';
+		isOpen = true;
+	}
+
+	export function openEdit(scenario: SavedScenario) {
+		draft = { ...scenario };
+		alertText = '';
+		isOpen = true;
+	}
+
+	function close() {
+		isOpen = false;
+	}
+
+	async function handleSave() {
+		try {
+			const saved =
+				draft.id && draft.id > 0
+					? await scenariosApi.update(draft)
+					: await scenariosApi.create(draft);
+			addToast({ header: $t('scenario.updated'), body: saved.name, color: 'success' });
+			onSaved(saved);
+			close();
+		} catch (err: unknown) {
+			alertText = (err as Error).message;
+		}
+	}
+</script>
+
+<Modal {isOpen} toggle={close} size="lg" fade={false} scrollable>
+	<div class="modal-header">
+		<h5 class="modal-title">{$t('scenario.title')}</h5>
+		<button type="button" class="btn-close" onclick={close} aria-label="Close"></button>
+	</div>
+	<div class="modal-body">
+		{#if alertText}
+			<Alert color="danger" isOpen={true} toggle={() => (alertText = '')} fade={false}>
+				<Icon name="exclamation-triangle" class="me-2" />
+				{alertText}
+			</Alert>
+		{/if}
+		<form
+			onsubmit={(e) => {
+				e.preventDefault();
+				handleSave();
+			}}>
+			<div class="mb-2">
+				<Label class="small">{$t('scenario.select')}</Label>
+				<Input class="form-control-sm" type="text" bind:value={draft.name} required />
+			</div>
+			<div class="d-flex gap-2">
+				<Button type="submit" color="success" size="sm">{$t('editor.save')}</Button>
+				<Button color="secondary" size="sm" type="button" onclick={close}>
+					{$t('editor.close')}
+				</Button>
+			</div>
+		</form>
+	</div>
+</Modal>

src/lib/features/prediction/ScenarioPanel.svelte

@@ -0,0 +1,189 @@
+<script lang="ts">
+	import { onMount } from 'svelte';
+	import {
+		Button,
+		FormGroup,
+		Icon,
+		Input,
+		InputGroup,
+		Label,
+	} from '@sveltestrap/sveltestrap';
+	import { CollapsibleCard, SelectSearchable, addToast } from '$ui';
+	import { scenariosApi } from '$api';
+	import { PREDICTION_MODES, type SavedScenario } from '$domain';
+	import { workspacesStore, getActiveWorkspace } from '$features/workspaces';
+	import { t } from '$i18n';
+	import { scenariosStore } from './pointsStore';
+	import ScenarioEditor from './ScenarioEditor.svelte';
+
+	let selectedScenarioId = $state<number>(-1);
+	let editorRef: ScenarioEditor | null = $state(null);
+
+	let active = $derived(getActiveWorkspace($workspacesStore));
+	let scenarioUnsaved = $derived.by(() => {
+		if (!active) return false;
+		const saved = $scenariosStore.find((s) => s.id === selectedScenarioId);
+		if (!saved) return false;
+		return (
+			JSON.stringify(active.flightParameters) !== JSON.stringify(saved.flight_parameters)
+		);
+	});
+
+	onMount(async () => {
+		try {
+			scenariosStore.set(await scenariosApi.list());
+		} catch (err: unknown) {
+			addToast({ header: $t('common.error'), body: (err as Error).message, color: 'danger' });
+		}
+	});
+
+	function handleApplySelected(showToast = true) {
+		const scenario = $scenariosStore.find((s) => s.id === selectedScenarioId);
+		if (!scenario || !active) {
+			if (showToast) {
+				addToast({
+					header: $t('scenario.notFound'),
+					body: $t('scenario.notFoundBody'),
+					color: 'warning',
+				});
+			}
+			return;
+		}
+		workspacesStore.patch(active.id, {
+			name: scenario.name,
+			flightParameters: scenario.flight_parameters,
+		});
+		if (showToast) {
+			addToast({
+				header: $t('scenario.applied'),
+				body: $t('scenario.appliedBody', { name: scenario.name }),
+				color: 'success',
+			});
+		}
+	}
+
+	async function handleSaveCurrent() {
+		if (!active) return;
+		const existing = $scenariosStore.find((s) => s.id === selectedScenarioId);
+		if (existing) {
+			try {
+				const updated = await scenariosApi.update({
+					...existing,
+					flight_parameters: active.flightParameters,
+				});
+				scenariosStore.update((list) =>
+					list.map((s) => (s.id === updated.id ? updated : s)),
+				);
+				addToast({
+					header: $t('scenario.updated'),
+					body: $t('scenario.updatedBody', { name: updated.name }),
+					color: 'success',
+				});
+			} catch (err: unknown) {
+				addToast({
+					header: $t('scenario.updateError'),
+					body: $t('scenario.updateErrorBody', { error: (err as Error).message }),
+					color: 'danger',
+				});
+			}
+		} else {
+			editorRef?.openCreate(active.flightParameters);
+		}
+	}
+
+	function handleEditorSaved(s: SavedScenario) {
+		scenariosStore.update((list) => [...list.filter((x) => x.id !== s.id), s]);
+		selectedScenarioId = s.id;
+	}
+</script>
+
+<CollapsibleCard title={$t('scenario.title')}>
+	<FormGroup spacing="mb-2">
+		<Label class="form-label">{$t('scenario.select')}</Label>
+		<InputGroup size="sm">
+			<SelectSearchable
+				style="min-height: calc(1.5em + .5rem + 2px); padding: .25rem .5rem; font-size: .875rem;"
+				id="sp-scenario"
+				options={$scenariosStore.map((s) => ({
+					value: s.id,
+					label: `${s.name}${s.id === selectedScenarioId && scenarioUnsaved ? ` (${$t('scenario.modified')})` : ''}`,
+				}))}
+				bind:selected={selectedScenarioId}
+				placeholder={$t('scenario.placeholder')}
+				searchPlaceholder={$t('scenario.searchPlaceholder')}
+				clearable={true}
+				onChange={() => {
+					if (!scenarioUnsaved) handleApplySelected(false);
+				}} />
+			<Button color="success" title={$t('scenario.apply')} onclick={() => handleApplySelected(true)}>
+				<span>✓</span>
+			</Button>
+		</InputGroup>
+	</FormGroup>
+
+	<div class="d-flex gap-2 mb-2">
+		<Button color="secondary flex-fill" size="sm">
+			{$t('scenario.all')}
+			<Icon name="journal-bookmark-fill" />
+		</Button>
+		<Button
+			color="primary flex-fill"
+			size="sm"
+			onclick={handleSaveCurrent}
+			disabled={!scenarioUnsaved && selectedScenarioId !== -1}>
+			{selectedScenarioId !== -1 ? $t('scenario.update') : $t('scenario.save')}
+			<Icon name="floppy2-fill" />
+		</Button>
+	</div>
+
+	<hr />
+
+	{#if active}
+		<FormGroup spacing="mb-2">
+			<Label class="form-label">{$t('scenario.mode')}</Label>
+			<InputGroup size="sm">
+				<Input type="select" class="form-control-sm">
+					{#each PREDICTION_MODES as mode}
+						<option value={mode}>{$t(`predictionMode.${mode}`)}</option>
+					{/each}
+				</Input>
+			</InputGroup>
+		</FormGroup>
+
+		<FormGroup spacing="mb-2">
+			<Label class="form-label">{$t('scenario.model')}</Label>
+			<InputGroup size="sm">
+				<Input type="select" class="form-control-sm">
+					<option>GFS (0.25°)</option>
+					<option>GFS (0.5°)</option>
+				</Input>
+			</InputGroup>
+		</FormGroup>
+
+		<FormGroup spacing="mb-2">
+			<Label class="form-label">{$t('scenario.dataset')}</Label>
+			<InputGroup size="sm">
+				<Input type="select" class="form-control-sm">
+					<option>{$t('scenario.datasetAuto')}</option>
+				</Input>
+			</InputGroup>
+		</FormGroup>
+
+		<FormGroup spacing="mb-0">
+			<Label class="form-label">{$t('scenario.export')}</Label>
+			<InputGroup size="sm">
+				<Input type="select" class="form-control-sm">
+					<option>JSON</option>
+					<option>CSV</option>
+					<option>KML</option>
+				</Input>
+				<Button color="primary">
+					<span>{$t('scenario.exportBtn')}</span>
+					<Icon name="file-earmark-arrow-down" />
+				</Button>
+			</InputGroup>
+		</FormGroup>
+	{/if}
+</CollapsibleCard>
+
+<ScenarioEditor bind:this={editorRef} onSaved={handleEditorSaved} />

src/lib/features/prediction/index.ts

@@ -0,0 +1,7 @@
+export { default as ControlPanel } from './ControlPanel.svelte';
+export { default as ScenarioPanel } from './ScenarioPanel.svelte';
+export { default as PointEditor } from './PointEditor.svelte';
+export { default as ScenarioEditor } from './ScenarioEditor.svelte';
+export { default as CurveEditor } from './CurveEditor.svelte';
+export { default as CurveChart } from './CurveChart.svelte';
+export { pointsStore, profilesStore, scenariosStore } from './pointsStore';

src/lib/features/prediction/pointsStore.ts

@@ -0,0 +1,11 @@
+import { writable } from 'svelte/store';
+import type { SavedPoint, SavedFlightProfile, SavedScenario } from '$domain';
+
+/**
+ * Session-scoped caches for the user's saved points, profiles, and scenarios.
+ * Persisting these would fight the server as the source of truth, so they
+ * are plain in-memory writables hydrated from the API on mount.
+ */
+export const pointsStore = writable<SavedPoint[]>([]);
+export const profilesStore = writable<SavedFlightProfile[]>([]);
+export const scenariosStore = writable<SavedScenario[]>([]);

src/lib/features/settings/SettingsPanel.svelte

@@ -0,0 +1,70 @@
+<script lang="ts">
+	import { FormGroup, Label, Input } from '@sveltestrap/sveltestrap';
+	import { CollapsibleCard } from '$ui';
+	import { t, setLocale, type Locale } from '$i18n';
+	import { SETTINGS_SCHEMA } from './schema';
+	import { settingsStore, setPath, getPath, type AppSettings } from './store';
+
+	function applyChange<T extends object>(path: string, value: unknown) {
+		settingsStore.update((s) => setPath(s as T, path, value) as AppSettings);
+		if (path === 'locale') setLocale(value as Locale);
+	}
+</script>
+
+<CollapsibleCard title={$t('settings.title')}>
+	{#each SETTINGS_SCHEMA as section}
+		<h6 class="mt-2 small text-muted text-uppercase">{$t(section.titleKey)}</h6>
+
+		{#each section.fields as field}
+			{@const current = getPath($settingsStore, field.path)}
+
+			<FormGroup spacing="mb-2">
+				{#if field.kind !== 'boolean'}
+					<Label class="form-label">{$t(field.labelKey)}</Label>
+				{/if}
+
+				{#if field.kind === 'boolean'}
+					<div class="form-check">
+						<input
+							class="form-check-input"
+							type="checkbox"
+							id={`setting-${field.path}`}
+							checked={Boolean(current)}
+							onchange={(e) =>
+								applyChange(field.path, (e.currentTarget as HTMLInputElement).checked)} />
+						<label class="form-check-label" for={`setting-${field.path}`}>
+							{$t(field.labelKey)}
+						</label>
+					</div>
+				{:else if field.kind === 'select'}
+					<Input
+						type="select"
+						class="form-control-sm"
+						value={current}
+						onchange={(e) => applyChange(field.path, (e.currentTarget as HTMLSelectElement).value)}>
+						{#each field.options as option}
+							<option value={option.value}>{option.value}</option>
+						{/each}
+					</Input>
+				{:else if field.kind === 'number'}
+					<Input
+						type="number"
+						class="form-control-sm"
+						value={current as number}
+						min={field.min}
+						max={field.max}
+						step={field.step}
+						oninput={(e) =>
+							applyChange(field.path, parseFloat((e.currentTarget as HTMLInputElement).value))} />
+				{:else if field.kind === 'string'}
+					<Input
+						type="text"
+						class="form-control-sm"
+						value={current as string}
+						placeholder={field.placeholder}
+						oninput={(e) => applyChange(field.path, (e.currentTarget as HTMLInputElement).value)} />
+				{/if}
+			</FormGroup>
+		{/each}
+	{/each}
+</CollapsibleCard>

src/lib/features/settings/index.ts

@@ -0,0 +1,5 @@
+export { settingsStore, DEFAULT_SETTINGS } from './store';
+export type { AppSettings, MapSettings, UnitsSettings } from './store';
+export { default as SettingsPanel } from './SettingsPanel.svelte';
+export { SETTINGS_SCHEMA } from './schema';
+export type { SettingsField, SettingsSection } from './schema';

src/lib/features/settings/schema.ts

@@ -0,0 +1,86 @@
+/**
+ * Declarative settings schema. Each `SettingsField` describes a single setting
+ * that renders as a labeled form control in the Settings panel. Keep this
+ * independent of Svelte so the same schema can drive future serializers
+ * (export/import settings, URL state, etc.).
+ */
+
+export type FieldKind = 'boolean' | 'select' | 'number' | 'string';
+
+export interface BaseField<K extends FieldKind> {
+	kind: K;
+	/** Dot-separated path into AppSettings (e.g. `'map.baseLayer'`). */
+	path: string;
+	labelKey: string;
+	descriptionKey?: string;
+}
+
+export interface BooleanField extends BaseField<'boolean'> {}
+
+export interface NumberField extends BaseField<'number'> {
+	min?: number;
+	max?: number;
+	step?: number;
+}
+
+export interface StringField extends BaseField<'string'> {
+	placeholder?: string;
+}
+
+export interface SelectField extends BaseField<'select'> {
+	options: { value: string; labelKey: string }[];
+}
+
+export type SettingsField = BooleanField | NumberField | StringField | SelectField;
+
+export interface SettingsSection {
+	titleKey: string;
+	fields: SettingsField[];
+}
+
+export const SETTINGS_SCHEMA: SettingsSection[] = [
+	{
+		titleKey: 'settings.language',
+		fields: [
+			{
+				kind: 'select',
+				path: 'locale',
+				labelKey: 'settings.language',
+				options: [
+					{ value: 'ru', labelKey: 'common.yes' },
+					{ value: 'en', labelKey: 'common.yes' },
+				],
+			},
+		],
+	},
+	{
+		titleKey: 'settings.map',
+		fields: [
+			{
+				kind: 'select',
+				path: 'map.baseLayer',
+				labelKey: 'settings.baseLayer',
+				options: [
+					{ value: 'osm', labelKey: 'settings.baseLayer' },
+					{ value: 'satellite', labelKey: 'settings.baseLayer' },
+				],
+			},
+			{ kind: 'boolean', path: 'map.showScale', labelKey: 'settings.showScale' },
+			{ kind: 'boolean', path: 'map.showNavigation', labelKey: 'settings.showNavigation' },
+		],
+	},
+	{
+		titleKey: 'settings.units',
+		fields: [
+			{
+				kind: 'select',
+				path: 'units.system',
+				labelKey: 'settings.units',
+				options: [
+					{ value: 'metric', labelKey: 'settings.metric' },
+					{ value: 'imperial', labelKey: 'settings.imperial' },
+				],
+			},
+		],
+	},
+];

src/lib/features/settings/store.ts

@@ -0,0 +1,50 @@
+import { persisted } from '$state';
+import type { Locale } from '$i18n';
+
+export interface MapSettings {
+	baseLayer: 'osm' | 'satellite';
+	showScale: boolean;
+	showNavigation: boolean;
+}
+
+export interface UnitsSettings {
+	system: 'metric' | 'imperial';
+}
+
+export interface AppSettings {
+	locale: Locale;
+	map: MapSettings;
+	units: UnitsSettings;
+}
+
+export const DEFAULT_SETTINGS: AppSettings = {
+	locale: 'ru',
+	map: { baseLayer: 'osm', showScale: true, showNavigation: true },
+	units: { system: 'metric' },
+};
+
+export const settingsStore = persisted<AppSettings>('settings', DEFAULT_SETTINGS);
+
+/** Resolve `'a.b.c'` to `obj.a.b.c`. Used by the schema-driven settings form. */
+export function getPath(obj: unknown, path: string): unknown {
+	return path.split('.').reduce<unknown>((acc, key) => {
+		if (acc && typeof acc === 'object' && key in acc) {
+			return (acc as Record<string, unknown>)[key];
+		}
+		return undefined;
+	}, obj);
+}
+
+export function setPath<T extends object>(obj: T, path: string, value: unknown): T {
+	const keys = path.split('.');
+	const next: Record<string, unknown> = { ...(obj as Record<string, unknown>) };
+	let cursor: Record<string, unknown> = next;
+	for (let i = 0; i < keys.length - 1; i++) {
+		const k = keys[i];
+		const existing = cursor[k];
+		cursor[k] = { ...((existing as Record<string, unknown> | undefined) ?? {}) };
+		cursor = cursor[k] as Record<string, unknown>;
+	}
+	cursor[keys[keys.length - 1]] = value;
+	return next as T;
+}

src/lib/features/timeline/TimeLine.svelte

@@ -0,0 +1,117 @@
+<script lang="ts">
+	import { timelineStore } from './store';
+	import { t } from '$i18n';
+
+	const SPEEDS = [0.5, 1, 2, 5, 10];
+
+	function cycleSpeed() {
+		const i = SPEEDS.indexOf($timelineStore.speed);
+		timelineStore.setSpeed(SPEEDS[(i + 1) % SPEEDS.length]);
+	}
+
+	function onSeek(e: Event) {
+		const v = parseFloat((e.currentTarget as HTMLInputElement).value);
+		timelineStore.seek(v);
+	}
+
+	let duration = $derived(Math.max(0, $timelineStore.max - $timelineStore.min));
+	let elapsed = $derived(Math.max(0, $timelineStore.time - $timelineStore.min));
+
+	function fmtHms(ms: number): string {
+		if (!isFinite(ms) || ms < 0) return '00:00:00';
+		const s = Math.floor(ms / 1000);
+		const hh = String(Math.floor(s / 3600)).padStart(2, '0');
+		const mm = String(Math.floor((s % 3600) / 60)).padStart(2, '0');
+		const ss = String(s % 60).padStart(2, '0');
+		return `${hh}:${mm}:${ss}`;
+	}
+
+	let hasData = $derived(duration > 0);
+</script>
+
+<div class="timeline-container card shadow-sm" class:disabled={!hasData}>
+	<div class="card-body p-2">
+		<div class="d-flex align-items-center gap-2">
+			<div class="btn-group btn-group-sm" role="group">
+				<button
+					type="button"
+					class="btn btn-outline-primary"
+					onclick={() => timelineStore.reset()}
+					disabled={!hasData}
+					title={$t('timeline.stop')}
+					aria-label={$t('timeline.stop')}>
+					<i class="bi bi-skip-start-fill"></i>
+				</button>
+				{#if $timelineStore.playing}
+					<button
+						type="button"
+						class="btn btn-warning"
+						onclick={() => timelineStore.pause()}
+						title={$t('timeline.pause')}
+						aria-label={$t('timeline.pause')}>
+						<i class="bi bi-pause-fill"></i>
+					</button>
+				{:else}
+					<button
+						type="button"
+						class="btn btn-success"
+						onclick={() => timelineStore.play()}
+						disabled={!hasData}
+						title={$t('timeline.play')}
+						aria-label={$t('timeline.play')}>
+						<i class="bi bi-play-fill"></i>
+					</button>
+				{/if}
+				<button
+					type="button"
+					class="btn btn-outline-secondary"
+					onclick={cycleSpeed}
+					disabled={!hasData}
+					title={$t('timeline.speed')}>
+					{$timelineStore.speed}x
+				</button>
+			</div>
+
+			<div class="flex-fill d-flex flex-column">
+				<input
+					type="range"
+					class="form-range"
+					min={$timelineStore.min}
+					max={$timelineStore.max}
+					step="1000"
+					value={$timelineStore.time}
+					oninput={onSeek}
+					disabled={!hasData} />
+				<div class="d-flex justify-content-between small font-monospace text-muted">
+					<span>{fmtHms(elapsed)}</span>
+					<span>{fmtHms(duration)}</span>
+				</div>
+			</div>
+		</div>
+	</div>
+</div>
+
+<style>
+	.timeline-container {
+		position: absolute;
+		bottom: 20px;
+		left: 50%;
+		transform: translateX(-50%);
+		min-width: 500px;
+		max-width: 720px;
+		z-index: 1000;
+		background: var(--bs-body-bg);
+		backdrop-filter: blur(10px);
+	}
+	.timeline-container.disabled {
+		opacity: 0.7;
+	}
+
+	@media (max-width: 767.98px) {
+		.timeline-container {
+			min-width: calc(100vw - 24px);
+			max-width: calc(100vw - 24px);
+			bottom: 10px;
+		}
+	}
+</style>

src/lib/features/timeline/index.ts

@@ -0,0 +1,3 @@
+export { timelineStore } from './store';
+export type { TimelineState } from './store';
+export { default as TimeLine } from './TimeLine.svelte';

src/lib/features/timeline/store.ts

@@ -0,0 +1,93 @@
+import { writable } from 'svelte/store';
+
+/**
+ * Global playback clock.
+ *
+ * `time` is an absolute timestamp in ms (UTC). Each layer/workspace samples
+ * its own trajectory against this clock, so multiple workspaces stay in sync.
+ *
+ * Consumers should treat the range `[min, max]` as the current domain; if
+ * they own a trajectory spanning a different interval they can clamp
+ * locally, but the UI slider always operates over the global range.
+ */
+
+export interface TimelineState {
+	time: number;
+	min: number;
+	max: number;
+	speed: number;
+	playing: boolean;
+}
+
+const initial: TimelineState = {
+	time: 0,
+	min: 0,
+	max: 0,
+	speed: 1,
+	playing: false,
+};
+
+function createTimeline() {
+	const store = writable<TimelineState>(initial);
+	let frame: number | null = null;
+	let lastTick = 0;
+
+	function tick(ts: number) {
+		store.update((s) => {
+			if (!s.playing) return s;
+			if (!lastTick) lastTick = ts;
+			const dt = (ts - lastTick) * s.speed;
+			lastTick = ts;
+			let next = s.time + dt;
+			if (next >= s.max) {
+				next = s.max;
+				frame = null;
+				return { ...s, time: next, playing: false };
+			}
+			frame = requestAnimationFrame(tick);
+			return { ...s, time: next };
+		});
+	}
+
+	function play() {
+		store.update((s) => {
+			if (s.max <= s.min) return s;
+			if (s.time >= s.max) return { ...s, time: s.min, playing: true };
+			return { ...s, playing: true };
+		});
+		lastTick = 0;
+		frame = requestAnimationFrame(tick);
+	}
+
+	function pause() {
+		if (frame !== null) cancelAnimationFrame(frame);
+		frame = null;
+		store.update((s) => ({ ...s, playing: false }));
+	}
+
+	function reset() {
+		pause();
+		store.update((s) => ({ ...s, time: s.min }));
+	}
+
+	function seek(time: number) {
+		store.update((s) => ({ ...s, time: Math.max(s.min, Math.min(s.max, time)) }));
+	}
+
+	function setSpeed(speed: number) {
+		store.update((s) => ({ ...s, speed }));
+	}
+
+	function setRange(min: number, max: number) {
+		store.update((s) => {
+			const nextMin = Number.isFinite(min) ? min : s.min;
+			const nextMax = Number.isFinite(max) ? max : s.max;
+			const t = Math.max(nextMin, Math.min(nextMax, s.time));
+			return { ...s, min: nextMin, max: nextMax, time: t };
+		});
+	}
+
+	return { subscribe: store.subscribe, play, pause, reset, seek, setSpeed, setRange };
+}
+
+export const timelineStore = createTimeline();

src/lib/features/tracking/TelemetryPanel.svelte

@@ -0,0 +1,36 @@
+<script lang="ts">
+	import { FormGroup, Label, Input, InputGroup } from '@sveltestrap/sveltestrap';
+	import { CollapsibleCard } from '$ui';
+	import { t } from '$i18n';
+
+	// Placeholder — wire to the tracking telemetry store once the tracking
+	// pipeline has a real data source.
+	let telemetry: { latitude?: number; longitude?: number; altitude?: number } = $state({
+		latitude: 56.3576,
+		longitude: 39.8666,
+		altitude: 1000,
+	});
+</script>
+
+<CollapsibleCard title={$t('nav.track')}>
+	<FormGroup spacing="mb-2">
+		<Label class="small">{$t('points.lat')}</Label>
+		<InputGroup size="sm">
+			<Input type="text" value={telemetry.latitude ?? 'N/A'} readonly />
+		</InputGroup>
+	</FormGroup>
+
+	<FormGroup spacing="mb-2">
+		<Label class="small">{$t('points.lon')}</Label>
+		<InputGroup size="sm">
+			<Input type="text" value={telemetry.longitude ?? 'N/A'} readonly />
+		</InputGroup>
+	</FormGroup>
+
+	<FormGroup spacing="mb-2">
+		<Label class="small">{$t('points.alt')}</Label>
+		<InputGroup size="sm">
+			<Input type="text" value={telemetry.altitude ?? 'N/A'} readonly />
+		</InputGroup>
+	</FormGroup>
+</CollapsibleCard>

src/lib/features/tracking/index.ts

@@ -0,0 +1 @@
+export { default as TelemetryPanel } from './TelemetryPanel.svelte';

src/lib/features/workspaces/WorkspaceRenderer.svelte

@@ -0,0 +1,132 @@
+<script lang="ts">
+	import { onDestroy } from 'svelte';
+	import { getMap, plotPrediction, plotAnimatedMarker } from '$map';
+	import { timelineStore } from '$features/timeline/store';
+	import { workspacesStore } from './store';
+	import type { Workspace } from './types';
+	import type { LatLngTuple } from '$domain';
+
+	/**
+	 * Renders every workspace onto the shared map. Each workspace gets its own
+	 * named scene (`ws/<id>`) so its layers can be cleared independently, plus
+	 * a `cursor/<id>` scene for the animated playback marker.
+	 *
+	 * The component is placed as a child of <Map /> so `getMap()` returns a
+	 * non-null instance via context.
+	 */
+
+	const map = getMap();
+	if (!map) throw new Error('WorkspaceRenderer must be a descendant of <Map />');
+
+	// Track the scenes we currently own so we can dispose the ones that
+	// belong to workspaces which were removed from the store since last tick.
+	const ownedPlotScenes = new Set<string>();
+	const ownedCursorScenes = new Set<string>();
+
+	const sceneName = (w: Workspace) => `ws/${w.id}`;
+	const cursorName = (w: Workspace) => `cursor/${w.id}`;
+
+	function updateGlobalRange(items: Workspace[]) {
+		let min = Infinity;
+		let max = -Infinity;
+		for (const w of items) {
+			if (!w.visible || !w.result) continue;
+			const l = w.result.launch.datetime.getTime();
+			const r = w.result.landing.datetime.getTime();
+			if (l < min) min = l;
+			if (r > max) max = r;
+		}
+		if (!isFinite(min) || !isFinite(max)) {
+			timelineStore.setRange(0, 0);
+		} else {
+			timelineStore.setRange(min, max);
+		}
+	}
+
+	function renderAll(items: Workspace[]) {
+		if (!map) return;
+
+		const live = new Set<string>();
+		for (const w of items) {
+			const name = sceneName(w);
+			live.add(name);
+			if (!w.visible || !w.result) {
+				if (ownedPlotScenes.has(name)) {
+					map.disposeScene(name);
+					ownedPlotScenes.delete(name);
+				}
+				continue;
+			}
+			const scene = map.scene(name);
+			plotPrediction(scene, w.result, { color: w.color, opacity: w.opacity });
+			ownedPlotScenes.add(name);
+		}
+
+		for (const name of Array.from(ownedPlotScenes)) {
+			if (!live.has(name)) {
+				map.disposeScene(name);
+				ownedPlotScenes.delete(name);
+			}
+		}
+	}
+
+	function positionAt(path: LatLngTuple[], time: number, launchMs: number, landingMs: number) {
+		if (path.length === 0) return null;
+		if (launchMs === landingMs) return path[0];
+		const t = Math.max(0, Math.min(1, (time - launchMs) / (landingMs - launchMs)));
+		const idx = Math.min(path.length - 1, Math.floor(t * (path.length - 1)));
+		return path[idx];
+	}
+
+	function renderCursors(items: Workspace[], time: number) {
+		if (!map) return;
+
+		const live = new Set<string>();
+		for (const w of items) {
+			const name = cursorName(w);
+			live.add(name);
+			if (!w.visible || !w.result) {
+				if (ownedCursorScenes.has(name)) {
+					map.disposeScene(name);
+					ownedCursorScenes.delete(name);
+				}
+				continue;
+			}
+			const p = positionAt(
+				w.result.flight_path,
+				time,
+				w.result.launch.datetime.getTime(),
+				w.result.landing.datetime.getTime(),
+			);
+			if (!p) continue;
+			const scene = map.scene(name);
+			plotAnimatedMarker(scene, p[1], p[0]);
+			ownedCursorScenes.add(name);
+		}
+
+		for (const name of Array.from(ownedCursorScenes)) {
+			if (!live.has(name)) {
+				map.disposeScene(name);
+				ownedCursorScenes.delete(name);
+			}
+		}
+	}
+
+	$effect(() => {
+		const items = $workspacesStore.items;
+		renderAll(items);
+		updateGlobalRange(items);
+	});
+
+	$effect(() => {
+		renderCursors($workspacesStore.items, $timelineStore.time);
+	});
+
+	onDestroy(() => {
+		if (!map) return;
+		for (const name of ownedPlotScenes) map.disposeScene(name);
+		for (const name of ownedCursorScenes) map.disposeScene(name);
+		ownedPlotScenes.clear();
+		ownedCursorScenes.clear();
+	});
+</script>

src/lib/features/workspaces/WorkspacesPanel.svelte

@@ -0,0 +1,159 @@
+<script lang="ts">
+	import { Button, Icon, Input, InputGroup } from '@sveltestrap/sveltestrap';
+	import { CollapsibleCard, ConfirmationPrompt } from '$ui';
+	import { addToast } from '$ui';
+	import { t } from '$i18n';
+	import { workspacesStore } from './store';
+	import type { Workspace } from './types';
+
+	let toDelete = $state<Workspace | null>(null);
+	let busy = $state<Record<string, boolean>>({});
+
+	function handleAdd() {
+		workspacesStore.add();
+	}
+
+	function handleToggleVisible(w: Workspace) {
+		workspacesStore.patch(w.id, { visible: !w.visible });
+	}
+
+	function handleRename(w: Workspace, name: string) {
+		workspacesStore.patch(w.id, { name });
+	}
+
+	function handleColor(w: Workspace, color: string) {
+		workspacesStore.patch(w.id, { color });
+	}
+
+	function handleOpacity(w: Workspace, opacity: number) {
+		workspacesStore.patch(w.id, { opacity });
+	}
+
+	function handleSetActive(w: Workspace) {
+		workspacesStore.setActive(w.id);
+	}
+
+	async function handleRun(w: Workspace) {
+		busy = { ...busy, [w.id]: true };
+		try {
+			await workspacesStore.run(w.id);
+		} catch (err: unknown) {
+			addToast({
+				header: $t('common.error'),
+				body: $t('workspaces.runError', { error: (err as Error).message }),
+				color: 'danger',
+			});
+		} finally {
+			busy = { ...busy, [w.id]: false };
+		}
+	}
+
+	function handleDelete() {
+		if (!toDelete) return;
+		workspacesStore.remove(toDelete.id);
+		toDelete = null;
+	}
+</script>
+
+<CollapsibleCard title={$t('workspaces.title')}>
+	<div class="d-flex justify-content-end mb-2">
+		<Button color="primary" size="sm" onclick={handleAdd}>
+			<Icon name="plus-lg" />
+			{$t('workspaces.add')}
+		</Button>
+	</div>
+
+	{#if $workspacesStore.items.length === 0}
+		<div class="text-muted small text-center py-2">{$t('workspaces.empty')}</div>
+	{/if}
+
+	<div class="d-flex flex-column gap-2">
+		{#each $workspacesStore.items as w (w.id)}
+			{@const isActive = $workspacesStore.activeId === w.id}
+			<div
+				class="workspace-row border rounded p-2"
+				class:active={isActive}
+				style="border-left: 4px solid {w.color} !important;">
+				<div class="d-flex align-items-center gap-2 mb-2">
+					<Button
+						size="sm"
+						color="light"
+						title={$t('workspaces.visible')}
+						onclick={() => handleToggleVisible(w)}>
+						<Icon name={w.visible ? 'eye' : 'eye-slash'} />
+					</Button>
+					<Input
+						type="text"
+						class="form-control-sm flex-grow-1"
+						value={w.name}
+						oninput={(e) => handleRename(w, (e.currentTarget as HTMLInputElement).value)} />
+					<Button size="sm" color="danger" onclick={() => (toDelete = w)} title={$t('workspaces.delete')}>
+						<Icon name="trash" />
+					</Button>
+				</div>
+
+				<div class="d-flex align-items-center gap-2 mb-2 small">
+					<span>{$t('workspaces.color')}</span>
+					<input
+						type="color"
+						class="form-control form-control-color form-control-sm"
+						style="width: 2rem; height: 1.75rem; padding: 0.1rem;"
+						value={w.color}
+						oninput={(e) => handleColor(w, (e.currentTarget as HTMLInputElement).value)} />
+					<span class="ms-2">{$t('workspaces.opacity')}</span>
+					<input
+						type="range"
+						class="form-range"
+						style="max-width: 6rem;"
+						min="0.1"
+						max="1"
+						step="0.05"
+						value={w.opacity}
+						oninput={(e) => handleOpacity(w, parseFloat((e.currentTarget as HTMLInputElement).value))} />
+				</div>
+
+				<InputGroup size="sm">
+					<Button
+						color={isActive ? 'primary' : 'outline-primary'}
+						onclick={() => handleSetActive(w)}
+						class="flex-fill"
+						title={$t('workspaces.edit')}>
+						<Icon name="pencil-square" />
+						{$t('workspaces.edit')}
+					</Button>
+					<Button
+						color="success"
+						disabled={busy[w.id]}
+						onclick={() => handleRun(w)}
+						class="flex-fill">
+						<Icon name="play-fill" />
+						{busy[w.id] ? $t('workspaces.running') : $t('workspaces.run')}
+					</Button>
+				</InputGroup>
+
+				{#if w.lastRunError}
+					<div class="text-danger small mt-1">{w.lastRunError}</div>
+				{/if}
+			</div>
+		{/each}
+	</div>
+</CollapsibleCard>
+
+<ConfirmationPrompt
+	isOpen={toDelete !== null}
+	title={$t('workspaces.delete')}
+	confirmText={$t('workspaces.delete')}
+	cancelText={$t('editor.cancel')}
+	confirmVariant="danger"
+	onconfirm={handleDelete}
+	oncancel={() => (toDelete = null)}>
+	{#if toDelete}
+		<p>{$t('workspaces.deleteConfirm', { name: toDelete.name })}</p>
+	{/if}
+</ConfirmationPrompt>
+
+<style>
+	.workspace-row.active {
+		background: var(--bs-light);
+	}
+</style>

src/lib/features/workspaces/index.ts

@@ -0,0 +1,4 @@
+export { workspacesStore, getActiveWorkspace } from './store';
+export type { Workspace, WorkspaceInit } from './types';
+export { default as WorkspacesPanel } from './WorkspacesPanel.svelte';
+export { default as WorkspaceRenderer } from './WorkspaceRenderer.svelte';

src/lib/features/workspaces/store.ts

@@ -0,0 +1,128 @@
+import { get } from 'svelte/store';
+import { persisted } from '$state';
+import { DEFAULT_FLIGHT_PARAMETERS, type FlightParameters } from '$domain';
+import type { Prediction } from '$domain';
+import { predictionsApi } from '$api';
+import { parsePrediction } from '$domain';
+import { buildLaunchDateTime } from '$api';
+import type { Workspace, WorkspaceInit } from './types';
+
+const STORAGE_KEY = 'workspaces';
+
+const DEFAULT_COLORS = [
+	'#0d6efd',
+	'#dc3545',
+	'#198754',
+	'#fd7e14',
+	'#6f42c1',
+	'#20c997',
+	'#d63384',
+	'#0dcaf0',
+];
+
+function todayDate(): string {
+	return new Date().toISOString().split('T')[0];
+}
+
+function makeWorkspace(init: WorkspaceInit = {}, index = 0): Workspace {
+	return {
+		id: crypto.randomUUID(),
+		name: init.name ?? `Рабочая область ${index + 1}`,
+		color: init.color ?? DEFAULT_COLORS[index % DEFAULT_COLORS.length],
+		opacity: 1,
+		visible: true,
+		flightParameters: init.flightParameters ?? { ...DEFAULT_FLIGHT_PARAMETERS },
+		launchDate: init.launchDate ?? todayDate(),
+		launchTime: init.launchTime ?? '12:00:00',
+		result: null,
+	};
+}
+
+export interface WorkspaceSlice {
+	items: Workspace[];
+	activeId: string | null;
+}
+
+const initial: WorkspaceSlice = { items: [], activeId: null };
+
+/**
+ * Don't persist prediction results — they're large, transient, and can be
+ * re-fetched. The serializer strips `result` before writing to localStorage.
+ */
+const workspacesPersisted = persisted<WorkspaceSlice>(STORAGE_KEY, initial, {
+	serializer: {
+		stringify: (value) => {
+			const lean: WorkspaceSlice = {
+				...value,
+				items: value.items.map((w) => ({ ...w, result: null, lastRunError: undefined })),
+			};
+			return JSON.stringify(lean);
+		},
+		parse: (raw) => JSON.parse(raw) as WorkspaceSlice,
+	},
+});
+
+function update(fn: (s: WorkspaceSlice) => WorkspaceSlice): void {
+	workspacesPersisted.update(fn);
+}
+
+export const workspacesStore = {
+	subscribe: workspacesPersisted.subscribe,
+
+	add(init: WorkspaceInit = {}): Workspace {
+		let created: Workspace | null = null;
+		update((s) => {
+			const w = makeWorkspace(init, s.items.length);
+			created = w;
+			return { items: [...s.items, w], activeId: w.id };
+		});
+		return created!;
+	},
+
+	remove(id: string): void {
+		update((s) => {
+			const items = s.items.filter((w) => w.id !== id);
+			const activeId = s.activeId === id ? (items[0]?.id ?? null) : s.activeId;
+			return { items, activeId };
+		});
+	},
+
+	patch(id: string, patch: Partial<Workspace>): void {
+		update((s) => ({
+			...s,
+			items: s.items.map((w) => (w.id === id ? { ...w, ...patch } : w)),
+		}));
+	},
+
+	setActive(id: string | null): void {
+		update((s) => ({ ...s, activeId: id }));
+	},
+
+	setFlightParameters(id: string, params: FlightParameters): void {
+		workspacesStore.patch(id, { flightParameters: params });
+	},
+
+	setResult(id: string, result: Prediction | null, error?: string): void {
+		workspacesStore.patch(id, { result, lastRunError: error });
+	},
+
+	async run(id: string): Promise<void> {
+		const slice = get(workspacesPersisted);
+		const w = slice.items.find((x) => x.id === id);
+		if (!w) return;
+		try {
+			const launchDatetime = buildLaunchDateTime(w.launchDate, w.launchTime);
+			const response = await predictionsApi.run(w.flightParameters, launchDatetime);
+			const prediction = parsePrediction(response.result.prediction);
+			workspacesStore.setResult(id, prediction);
+		} catch (err: unknown) {
+			workspacesStore.setResult(id, null, (err as Error).message);
+			throw err;
+		}
+	},
+};
+
+export function getActiveWorkspace(slice: WorkspaceSlice): Workspace | null {
+	if (!slice.activeId) return slice.items[0] ?? null;
+	return slice.items.find((w) => w.id === slice.activeId) ?? null;
+}

src/lib/features/workspaces/types.ts

@@ -0,0 +1,23 @@
+import type { FlightParameters, Prediction } from '$domain';
+
+/** A "workspace" is an independently-configured prediction layer on the map. */
+export interface Workspace {
+	id: string;
+	name: string;
+	color: string;
+	opacity: number;
+	visible: boolean;
+	flightParameters: FlightParameters;
+	launchDate: string;
+	launchTime: string;
+	result: Prediction | null;
+	lastRunError?: string;
+}
+
+export interface WorkspaceInit {
+	name?: string;
+	color?: string;
+	flightParameters?: FlightParameters;
+	launchDate?: string;
+	launchTime?: string;
+}

src/lib/i18n/index.ts

@@ -0,0 +1,87 @@
+import { derived, writable, type Readable } from 'svelte/store';
+import { browser } from '$app/environment';
+
+/**
+ * Minimal i18n layer — no external deps.
+ *
+ * Lookup is key-based (`t('panel.title')`) against flat or nested JSON
+ * dictionaries. Interpolation uses `{name}` placeholders. Missing keys fall
+ * back to the key itself so screens remain functional during translation.
+ *
+ * Adding a locale
+ * ---------------
+ * 1. Drop a JSON file into `src/lib/i18n/locales/<code>.json`.
+ * 2. Register it in `loaders` below.
+ * 3. Expose it in the `Locale` type.
+ */
+
+export type Locale = 'ru' | 'en';
+
+export const DEFAULT_LOCALE: Locale = 'ru';
+export const SUPPORTED_LOCALES: Locale[] = ['ru', 'en'];
+const STORAGE_KEY = 'locale';
+
+type Messages = Record<string, unknown>;
+
+const loaders: Record<Locale, () => Promise<{ default: Messages }>> = {
+	ru: () => import('./locales/ru.json'),
+	en: () => import('./locales/en.json'),
+};
+
+const messages = writable<Record<Locale, Messages>>({} as Record<Locale, Messages>);
+const locale = writable<Locale>(DEFAULT_LOCALE);
+
+async function loadLocale(code: Locale): Promise<void> {
+	const mod = await loaders[code]();
+	messages.update((m) => ({ ...m, [code]: mod.default }));
+}
+
+export async function setLocale(code: Locale): Promise<void> {
+	if (!SUPPORTED_LOCALES.includes(code)) return;
+	await loadLocale(code);
+	locale.set(code);
+	if (browser) localStorage.setItem(STORAGE_KEY, code);
+}
+
+export async function initI18n(): Promise<void> {
+	const stored = browser ? (localStorage.getItem(STORAGE_KEY) as Locale | null) : null;
+	const next = stored && SUPPORTED_LOCALES.includes(stored) ? stored : DEFAULT_LOCALE;
+	await setLocale(next);
+}
+
+function lookup(dict: Messages, key: string): string | undefined {
+	const parts = key.split('.');
+	let node: unknown = dict;
+	for (const p of parts) {
+		if (node && typeof node === 'object' && p in (node as Messages)) {
+			node = (node as Messages)[p];
+		} else {
+			return undefined;
+		}
+	}
+	return typeof node === 'string' ? node : undefined;
+}
+
+function interpolate(template: string, values: Record<string, string | number>): string {
+	return template.replace(/\{(\w+)\}/g, (_, name) =>
+		name in values ? String(values[name]) : `{${name}}`,
+	);
+}
+
+export interface Translator {
+	(key: string, values?: Record<string, string | number>): string;
+}
+
+export const t: Readable<Translator> = derived(
+	[locale, messages],
+	([$locale, $messages]) => {
+		const dict = $messages[$locale];
+		return (key: string, values?: Record<string, string | number>) => {
+			const str = dict ? lookup(dict, key) : undefined;
+			if (str === undefined) return key;
+			return values ? interpolate(str, values) : str;
+		};
+	},
+);
+
+export const currentLocale: Readable<Locale> = { subscribe: locale.subscribe };

src/lib/i18n/locales/en.json

@@ -0,0 +1,172 @@
+{
+	"app": {
+		"title": "Stratospheric Flights | YKS Ltd.",
+		"company": "Yakutsk Space Systems Ltd."
+	},
+	"nav": {
+		"predict": "Predict",
+		"track": "Track",
+		"login": "Log in",
+		"logout": "Log out",
+		"account": "Account",
+		"scenarios": "Saved scenarios",
+		"predictionHistory": "Prediction history",
+		"trackingHistory": "Tracking history",
+		"user": "User"
+	},
+	"login": {
+		"heading": "Sign in to your account",
+		"username": "Username",
+		"password": "Password",
+		"submit": "Sign in",
+		"submitting": "Signing in...",
+		"back": "Back",
+		"invalidCredentials": "Invalid credentials",
+		"fieldsRequired": "Please enter a username and password"
+	},
+	"panel": {
+		"scenario": "Scenario",
+		"conditions": "Conditions",
+		"about": "About",
+		"layers": "Layers",
+		"results": "Results",
+		"settings": "Settings",
+		"workspaces": "Workspaces"
+	},
+	"scenario": {
+		"title": "Prediction scenario",
+		"select": "Scenario",
+		"placeholder": "New scenario...",
+		"searchPlaceholder": "Search scenarios...",
+		"apply": "Apply scenario",
+		"applied": "Scenario applied",
+		"appliedBody": "Scenario \"{name}\" successfully applied.",
+		"notFound": "Scenario not found",
+		"notFoundBody": "The selected scenario does not exist.",
+		"updated": "Scenario updated",
+		"updatedBody": "Scenario \"{name}\" successfully updated.",
+		"updateError": "Scenario update error",
+		"updateErrorBody": "Error updating scenario: {error}",
+		"save": "Save scenario",
+		"update": "Update scenario",
+		"all": "All scenarios",
+		"mode": "Scenario mode",
+		"model": "Atmospheric model",
+		"dataset": "Dataset",
+		"datasetAuto": "Pick automatically",
+		"modified": "modified",
+		"export": "Export result",
+		"exportBtn": "Export"
+	},
+	"predictionMode": {
+		"single": "Single",
+		"hourly": "Hourly",
+		"ensemble": "Ensemble"
+	},
+	"profile": {
+		"standard_profile": "Standard",
+		"float_profile": "Float",
+		"reverse_profile": "Reverse",
+		"custom_profile": "Custom"
+	},
+	"conditions": {
+		"title": "Prediction conditions",
+		"startTime": "Launch time (UTC)",
+		"startDate": "Launch date",
+		"flightProfile": "Flight profile",
+		"startPoint": "Launch point",
+		"pointPlaceholder": "New point...",
+		"pointSearchPlaceholder": "Search points...",
+		"latLng": "Latitude/Longitude",
+		"save": "Save",
+		"launchAlt": "Launch altitude (m)",
+		"burstAlt": "Burst altitude (m)",
+		"ascentRate": "Ascent rate (m/s)",
+		"descentRate": "Descent rate (m/s)",
+		"run": "Run prediction",
+		"profileEdit": "Ascent/descent profiles",
+		"ascentStage": "Ascent stage",
+		"descentStage": "Descent stage",
+		"stageNone": "None",
+		"stageStandard": "Standard",
+		"stageCustom": "Custom",
+		"openCurveEditor": "Open curve editor"
+	},
+	"workspaces": {
+		"title": "Workspaces",
+		"empty": "No workspaces yet.",
+		"add": "Add",
+		"rename": "Rename",
+		"delete": "Delete",
+		"visible": "Show/hide",
+		"color": "Color",
+		"opacity": "Opacity",
+		"run": "Run",
+		"running": "Running...",
+		"edit": "Edit",
+		"defaultName": "Workspace {n}",
+		"deleteConfirm": "Delete workspace \"{name}\"?",
+		"runError": "Run error: {error}"
+	},
+	"timeline": {
+		"title": "Flight timeline",
+		"time": "Time",
+		"altitude": "Altitude",
+		"position": "Position",
+		"play": "Play",
+		"pause": "Pause",
+		"stop": "Reset",
+		"speed": "Speed"
+	},
+	"settings": {
+		"title": "Settings",
+		"language": "Language",
+		"map": "Map",
+		"baseLayer": "Base layer",
+		"showScale": "Show scale",
+		"showNavigation": "Navigation controls",
+		"units": "Units",
+		"metric": "Metric",
+		"imperial": "Imperial",
+		"saved": "Settings saved"
+	},
+	"editor": {
+		"add": "Add",
+		"edit": "Edit",
+		"save": "Save",
+		"update": "Update",
+		"delete": "Delete",
+		"cancel": "Cancel",
+		"close": "Close",
+		"searchPlaceholder": "Search..."
+	},
+	"points": {
+		"item": "point",
+		"itemGenitive": "point",
+		"items": "points",
+		"name": "Point name",
+		"lat": "Latitude",
+		"lon": "Longitude",
+		"alt": "Altitude",
+		"degrees": "Degrees",
+		"metersAsl": "Meters ASL"
+	},
+	"common": {
+		"error": "Error",
+		"success": "Success",
+		"warning": "Warning",
+		"info": "Info",
+		"yes": "Yes",
+		"no": "No"
+	},
+	"selection": {
+		"header": "Coordinate select mode",
+		"body": "Click the map to pick coordinates"
+	},
+	"forecast": {
+		"success": "Forecast request",
+		"successBody": "Forecast request successful!",
+		"error": "Forecast error",
+		"errorBody": "Error running forecast: {error}"
+	}
+}

src/lib/i18n/locales/ru.json

@@ -0,0 +1,172 @@
+{
+	"app": {
+		"title": "Стратосферные полеты | ООО ЯКС",
+		"company": "ООО «Якутские Космические Системы»"
+	},
+	"nav": {
+		"predict": "Прогнозирование",
+		"track": "Слежение",
+		"login": "Войти",
+		"logout": "Выйти",
+		"account": "Учетная запись",
+		"scenarios": "Сохраненные сценарии",
+		"predictionHistory": "История прогнозов",
+		"trackingHistory": "История слежения",
+		"user": "Пользователь"
+	},
+	"login": {
+		"heading": "Вход в учетную запись",
+		"username": "Имя пользователя",
+		"password": "Пароль",
+		"submit": "Войти",
+		"submitting": "Вход...",
+		"back": "Назад",
+		"invalidCredentials": "Неверные учетные данные",
+		"fieldsRequired": "Пожалуйста, введите имя пользователя и пароль"
+	},
+	"panel": {
+		"scenario": "Сценарий",
+		"conditions": "Условия",
+		"about": "О проекте",
+		"layers": "Слои",
+		"results": "Результаты",
+		"settings": "Настройки",
+		"workspaces": "Рабочие области"
+	},
+	"scenario": {
+		"title": "Сценарий прогнозирования",
+		"select": "Сценарий",
+		"placeholder": "Новый сценарий...",
+		"searchPlaceholder": "Поиск сценариев...",
+		"apply": "Применить сценарий",
+		"applied": "Сценарий применен",
+		"appliedBody": "Сценарий \"{name}\" успешно применен.",
+		"notFound": "Сценарий не найден",
+		"notFoundBody": "Выбранный сценарий не существует.",
+		"updated": "Сценарий обновлен",
+		"updatedBody": "Сценарий \"{name}\" успешно обновлен.",
+		"updateError": "Ошибка обновления сценария",
+		"updateErrorBody": "Ошибка при обновлении сценария: {error}",
+		"save": "Сохранить сценарий",
+		"update": "Обновить сценарий",
+		"all": "Все сценарии",
+		"mode": "Режим сценария",
+		"model": "Модель атмосферы",
+		"dataset": "Набор данных",
+		"datasetAuto": "Выбрать автоматически",
+		"modified": "изменено",
+		"export": "Экспортировать результат",
+		"exportBtn": "Экспорт"
+	},
+	"predictionMode": {
+		"single": "Разовый",
+		"hourly": "Почасовой",
+		"ensemble": "Ансамблевый"
+	},
+	"profile": {
+		"standard_profile": "Обычный",
+		"float_profile": "Дрейф",
+		"reverse_profile": "Реверсивный",
+		"custom_profile": "Пользовательский"
+	},
+	"conditions": {
+		"title": "Условия прогнозирования",
+		"startTime": "Время старта (UTC)",
+		"startDate": "Дата старта",
+		"flightProfile": "Профиль полета",
+		"startPoint": "Точка старта",
+		"pointPlaceholder": "Новая точка...",
+		"pointSearchPlaceholder": "Поиск по точкам...",
+		"latLng": "Широта/Долгота",
+		"save": "Сохранить",
+		"launchAlt": "Высота старта (м)",
+		"burstAlt": "Высота разрыва (м)",
+		"ascentRate": "Скорость подъема (м/с)",
+		"descentRate": "Скорость спуска (м/с)",
+		"run": "Выполнить прогнозирование",
+		"profileEdit": "Профили подъема и спуска",
+		"ascentStage": "Стадия подъема",
+		"descentStage": "Стадия спуска",
+		"stageNone": "Нет",
+		"stageStandard": "Стандартная",
+		"stageCustom": "Пользовательская",
+		"openCurveEditor": "Открыть редактор кривых"
+	},
+	"workspaces": {
+		"title": "Рабочие области",
+		"empty": "Нет созданных областей.",
+		"add": "Добавить",
+		"rename": "Переименовать",
+		"delete": "Удалить",
+		"visible": "Показать/скрыть",
+		"color": "Цвет",
+		"opacity": "Прозрачность",
+		"run": "Рассчитать",
+		"running": "Расчет...",
+		"edit": "Редактировать",
+		"defaultName": "Рабочая область {n}",
+		"deleteConfirm": "Удалить рабочую область \"{name}\"?",
+		"runError": "Ошибка расчета: {error}"
+	},
+	"timeline": {
+		"title": "Временная шкала",
+		"time": "Время",
+		"altitude": "Высота",
+		"position": "Позиция",
+		"play": "Воспроизвести",
+		"pause": "Пауза",
+		"stop": "Сбросить",
+		"speed": "Скорость"
+	},
+	"settings": {
+		"title": "Настройки",
+		"language": "Язык",
+		"map": "Карта",
+		"baseLayer": "Базовый слой",
+		"showScale": "Показывать масштаб",
+		"showNavigation": "Навигационные элементы",
+		"units": "Единицы измерения",
+		"metric": "Метрические",
+		"imperial": "Имперские",
+		"saved": "Настройки сохранены"
+	},
+	"editor": {
+		"add": "Добавить",
+		"edit": "Редактировать",
+		"save": "Сохранить",
+		"update": "Обновить",
+		"delete": "Удалить",
+		"cancel": "Отмена",
+		"close": "Закрыть",
+		"searchPlaceholder": "Поиск..."
+	},
+	"points": {
+		"item": "точка",
+		"itemGenitive": "точки",
+		"items": "точки",
+		"name": "Название точки",
+		"lat": "Широта",
+		"lon": "Долгота",
+		"alt": "Высота",
+		"degrees": "Градусы",
+		"metersAsl": "Метры над ур. моря"
+	},
+	"common": {
+		"error": "Ошибка",
+		"success": "Успех",
+		"warning": "Предупреждение",
+		"info": "Информация",
+		"yes": "Да",
+		"no": "Нет"
+	},
+	"selection": {
+		"header": "Режим выбора координат",
+		"body": "Кликните на карту, чтобы выбрать координаты"
+	},
+	"forecast": {
+		"success": "Запрос прогноза",
+		"successBody": "Запрос прогноза успешно выполнен!",
+		"error": "Ошибка прогноза",
+		"errorBody": "Ошибка при получении прогноза: {error}"
+	}
+}

src/lib/index.js

@@ -1 +0,0 @@
-// place files you want to import through the `$lib` alias in this folder.

src/lib/map/Map.svelte

@@ -0,0 +1,77 @@
+<script lang="ts">
+	import { onMount, onDestroy, type Snippet } from 'svelte';
+	import type { IMap } from './core';
+	import type { LngLatTuple } from '$domain';
+	import { createMapLibreMap } from './maplibre';
+	import { setMapContext } from './context';
+
+	interface Props {
+		center?: LngLatTuple;
+		zoom?: number;
+		baseLayer?: 'osm' | 'satellite';
+		showNavigationControl?: boolean;
+		showScaleControl?: boolean;
+		children?: Snippet;
+		onReady?: (map: IMap) => void;
+	}
+
+	let {
+		center = [129.1234, 62.1234],
+		zoom = 4,
+		baseLayer = 'osm',
+		showNavigationControl = true,
+		showScaleControl = true,
+		children,
+		onReady,
+	}: Props = $props();
+
+	let container: HTMLDivElement;
+	let map: IMap | null = $state(null);
+	/**
+	 * Children must not render until the map's first `load` event. MapLibre
+	 * throws if addSource/addLayer is called on an unloaded style, and this
+	 * component is the natural gate for that invariant.
+	 */
+	let ready = $state(false);
+
+	setMapContext(() => map);
+
+	export function getInstance(): IMap | null {
+		return map;
+	}
+
+	onMount(() => {
+		map = createMapLibreMap({
+			container,
+			center,
+			zoom,
+			baseLayer,
+			showNavigationControl,
+			showScaleControl,
+		});
+		map.ready.then(() => {
+			ready = true;
+			if (map) {
+				onReady?.(map);
+				if (import.meta.env.DEV) {
+					// Debug handle for e2e tests and console inspection. Only exposed
+					// in dev builds; trimmed from production bundles.
+					// eslint-disable-next-line @typescript-eslint/no-explicit-any
+					(window as any)._lsvMap = map.getRawInstance();
+				}
+			}
+		});
+	});
+
+	onDestroy(() => {
+		map?.dispose();
+		map = null;
+		ready = false;
+	});
+</script>
+
+<div class="map-container" bind:this={container}>
+	{#if ready && map}
+		{@render children?.()}
+	{/if}
+</div>

src/lib/map/context.ts

@@ -0,0 +1,17 @@
+import { getContext, setContext } from 'svelte';
+import type { IMap } from './core';
+
+const KEY = Symbol('lsv-map');
+
+/** Child components fetch the `IMap` instance via `getMap()`. */
+export interface MapContext {
+	get(): IMap | null;
+}
+
+export function setMapContext(getter: () => IMap | null): void {
+	setContext<MapContext>(KEY, { get: getter });
+}
+
+export function getMap(): IMap | null {
+	return getContext<MapContext | undefined>(KEY)?.get() ?? null;
+}

src/lib/map/core.ts

@@ -0,0 +1,121 @@
+import type { LatLngTuple, LngLatTuple } from '$domain';
+
+/**
+ * Map abstraction.
+ *
+ * Goals:
+ *   - Isolate all MapLibre-specific types inside src/lib/map/maplibre.ts.
+ *   - Expose a small, map-library-agnostic vocabulary (markers, polylines,
+ *     icons, events) so features (workspaces, timeline, tools) can be tested
+ *     against the interface alone.
+ *   - Support "scenes" — named collections of layers owned by a feature so
+ *     each workspace/tool can add/remove everything it owns atomically.
+ *
+ * If another library ever replaces MapLibre, implementing IMap is the only
+ * file that changes.
+ */
+
+export type MapEvent = 'click' | 'mousemove' | 'move' | 'zoom' | 'load';
+
+export interface MapClickEvent {
+	lngLat: { lat: number; lng: number };
+	originalEvent: MouseEvent;
+}
+
+export type MapEventPayload = {
+	click: MapClickEvent;
+	mousemove: MapClickEvent;
+	move: { center: LngLatTuple; zoom: number };
+	zoom: { zoom: number };
+	load: undefined;
+};
+
+export type MapEventHandler<E extends MapEvent> = (e: MapEventPayload[E]) => void;
+
+export interface MarkerOptions {
+	lngLat: LngLatTuple;
+	iconUrl?: string;
+	iconSize?: [number, number];
+	className?: string;
+	/** Optional HTML shown in a popup on hover. */
+	popupHtml?: string;
+}
+
+export interface LineOptions {
+	coords: LatLngTuple[];
+	color?: string;
+	width?: number;
+	opacity?: number;
+	dashArray?: [number, number];
+}
+
+export interface CircleOptions {
+	center: LngLatTuple;
+	/** Radius in pixels (visual; screen-space, matches MapLibre circle layers). */
+	radiusPx?: number;
+	color?: string;
+	opacity?: number;
+	strokeColor?: string;
+	strokeWidth?: number;
+}
+
+export interface Marker {
+	setLngLat(pos: LngLatTuple): void;
+	remove(): void;
+}
+
+export interface MapLayer {
+	readonly id: string;
+	remove(): void;
+}
+
+export interface Scene {
+	readonly name: string;
+	addLine(id: string, options: LineOptions): MapLayer;
+	addCircle(id: string, options: CircleOptions): MapLayer;
+	addMarker(id: string, options: MarkerOptions): Marker;
+	/** Remove an individual layer in this scene by its id. */
+	remove(id: string): void;
+	/** Remove everything added to this scene. */
+	clear(): void;
+	/** Called by IMap.dispose() to release resources. */
+	dispose(): void;
+}
+
+export interface IMap {
+	ready: Promise<void>;
+
+	on<E extends MapEvent>(event: E, handler: MapEventHandler<E>): () => void;
+
+	setCenter(pos: LngLatTuple, zoom?: number): void;
+	panTo(pos: LngLatTuple, durationMs?: number): void;
+	fitBounds(coords: LatLngTuple[], paddingPx?: number): void;
+	getZoom(): number;
+	setZoom(zoom: number): void;
+
+	setCursor(cursor: string | null): void;
+
+	/**
+	 * Get or create a named scene. Scenes are the unit of layer ownership:
+	 * a feature adds all its layers through a scene and calls `.clear()` to
+	 * remove them in one step.
+	 */
+	scene(name: string): Scene;
+	disposeScene(name: string): void;
+
+	/** Underlying implementation instance, for code that needs library-specific APIs. Use sparingly. */
+	getRawInstance(): unknown;
+
+	dispose(): void;
+}
+
+export interface MapInit {
+	container: HTMLElement;
+	center: LngLatTuple;
+	zoom: number;
+	baseLayer?: 'osm' | 'satellite';
+	showNavigationControl?: boolean;
+	showScaleControl?: boolean;
+}
+
+export type MapFactory = (init: MapInit) => IMap;

src/lib/map/index.ts

@@ -0,0 +1,9 @@
+export * from './core';
+export { createMapLibreMap } from './maplibre';
+export { plotPrediction, plotTelemetry, plotAnimatedMarker } from './layers';
+export type { TrajectoryStyle } from './layers';
+export { startCoordinateSelection } from './tools/selection';
+export { startMeasure } from './tools/measure';
+export type { MeasureHandle, MeasureOptions } from './tools/measure';
+export { setMapContext, getMap } from './context';
+export { default as Map } from './Map.svelte';

src/lib/map/layers.ts

@@ -0,0 +1,124 @@
+import type { Prediction, Telemetry } from '$domain';
+import { toLngLat } from '$domain';
+import type { IMap, Scene } from './core';
+
+/**
+ * Plot helpers for high-level domain objects. These live outside MapLibreMap
+ * so they can be reused against any IMap implementation.
+ *
+ * Icons are served from /static; pass explicit overrides if a workspace
+ * should use custom markers.
+ */
+
+export interface TrajectoryStyle {
+	color?: string;
+	width?: number;
+	opacity?: number;
+	launchIcon?: string;
+	landingIcon?: string;
+	burstIcon?: string;
+	iconSize?: [number, number];
+}
+
+const DEFAULT_STYLE: Required<Omit<TrajectoryStyle, 'launchIcon' | 'landingIcon' | 'burstIcon'>> &
+	Pick<TrajectoryStyle, 'launchIcon' | 'landingIcon' | 'burstIcon'> = {
+	color: '#000000',
+	width: 3,
+	opacity: 1,
+	iconSize: [12, 12],
+	launchIcon: '/target-blue.png',
+	landingIcon: '/target-red.png',
+	burstIcon: '/pop-marker.png',
+};
+
+export function plotPrediction(
+	scene: Scene,
+	prediction: Prediction,
+	style: TrajectoryStyle = {},
+): void {
+	const s = { ...DEFAULT_STYLE, ...style };
+	scene.clear();
+
+	scene.addLine('path', {
+		coords: prediction.flight_path,
+		color: s.color,
+		width: s.width,
+		opacity: s.opacity,
+	});
+
+	scene.addMarker('launch', {
+		lngLat: toLngLat(prediction.launch.latlng),
+		iconUrl: s.launchIcon,
+		iconSize: s.iconSize,
+		popupHtml: `<b>Launch</b><br>${prediction.launch.latlng.lat.toFixed(6)}, ${prediction.launch.latlng.lng.toFixed(6)}`,
+	});
+
+	scene.addMarker('landing', {
+		lngLat: toLngLat(prediction.landing.latlng),
+		iconUrl: s.landingIcon,
+		iconSize: s.iconSize,
+		popupHtml: `<b>Landing</b><br>${prediction.landing.latlng.lat.toFixed(6)}, ${prediction.landing.latlng.lng.toFixed(6)}`,
+	});
+
+	scene.addMarker('burst', {
+		lngLat: toLngLat(prediction.burst.latlng),
+		iconUrl: s.burstIcon,
+		iconSize: [s.iconSize[0] + 4, s.iconSize[1] + 4],
+		popupHtml: `<b>Burst</b><br>${prediction.burst.latlng.lat.toFixed(6)}, ${prediction.burst.latlng.lng.toFixed(6)}`,
+	});
+}
+
+export function plotTelemetry(
+	map: IMap,
+	scene: Scene,
+	telemetry: Telemetry,
+	style: TrajectoryStyle = {},
+): void {
+	const s = { ...DEFAULT_STYLE, ...style };
+	scene.clear();
+
+	scene.addLine('path', {
+		coords: telemetry.flight_path,
+		color: s.color,
+		width: s.width,
+		opacity: s.opacity,
+	});
+
+	scene.addMarker('launch', {
+		lngLat: toLngLat(telemetry.launch.latlng),
+		iconUrl: s.launchIcon,
+		iconSize: s.iconSize,
+	});
+
+	telemetry.datapoints.forEach((p, i) => {
+		scene.addMarker(`point-${i}`, {
+			lngLat: [p.longitude, p.latitude],
+			iconUrl: '/marker-sm-red.png',
+			iconSize: [8, 8],
+			popupHtml: `<b>${p.datetime}</b><br>${p.latitude.toFixed(6)}, ${p.longitude.toFixed(6)}`,
+		});
+	});
+
+	if (telemetry.flight_path.length > 0) {
+		map.fitBounds(telemetry.flight_path, 50);
+	}
+}
+
+export function plotAnimatedMarker(scene: Scene, lng: number, lat: number): void {
+	scene.clear();
+	scene.addCircle('marker-ring', {
+		center: [lng, lat],
+		radiusPx: 14,
+		color: '#FF6B6B',
+		opacity: 0.3,
+		strokeColor: '#FF1744',
+		strokeWidth: 0,
+	});
+	scene.addCircle('marker-core', {
+		center: [lng, lat],
+		radiusPx: 6,
+		color: '#FF1744',
+		strokeColor: '#ffffff',
+		strokeWidth: 2,
+	});
+}

src/lib/map/maplibre.ts

@@ -0,0 +1,316 @@
+import maplibregl, {
+	type Map as MLMap,
+	type LngLatLike,
+	type MarkerOptions as MLMarkerOptions,
+} from 'maplibre-gl';
+import 'maplibre-gl/dist/maplibre-gl.css';
+
+import type {
+	CircleOptions,
+	IMap,
+	LineOptions,
+	MapEvent,
+	MapEventHandler,
+	MapEventPayload,
+	MapInit,
+	MapLayer,
+	Marker,
+	MarkerOptions,
+	Scene,
+} from './core';
+import type { LatLngTuple, LngLatTuple } from '$domain';
+
+/** Map common base-layer names to MapLibre style JSON. */
+const BASE_STYLES: Record<NonNullable<MapInit['baseLayer']>, maplibregl.StyleSpecification> = {
+	osm: {
+		version: 8,
+		sources: {
+			osm: {
+				type: 'raster',
+				tiles: ['https://a.tile.openstreetmap.org/{z}/{x}/{y}.png'],
+				tileSize: 256,
+				attribution: '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a>',
+			},
+		},
+		layers: [{ id: 'osm', type: 'raster', source: 'osm', minzoom: 0, maxzoom: 19 }],
+	},
+	satellite: {
+		version: 8,
+		sources: {
+			sat: {
+				type: 'raster',
+				tiles: [
+					'https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}',
+				],
+				tileSize: 256,
+				attribution: 'Tiles &copy; Esri',
+			},
+		},
+		layers: [{ id: 'sat', type: 'raster', source: 'sat', minzoom: 0, maxzoom: 19 }],
+	},
+};
+
+class MapLibreScene implements Scene {
+	private sources = new Set<string>();
+	private layers = new Set<string>();
+	private markers = new Map<string, maplibregl.Marker>();
+
+	constructor(
+		public readonly name: string,
+		private map: MLMap,
+	) {}
+
+	private scopeId(id: string): string {
+		return `${this.name}__${id}`;
+	}
+
+	addLine(id: string, options: LineOptions): MapLayer {
+		const layerId = this.scopeId(id);
+		const coords = options.coords.map<[number, number]>((c) => [c[1], c[0]]);
+
+		if (this.map.getSource(layerId)) this.remove(id);
+
+		this.map.addSource(layerId, {
+			type: 'geojson',
+			data: {
+				type: 'Feature',
+				properties: {},
+				geometry: { type: 'LineString', coordinates: coords },
+			},
+		});
+		this.map.addLayer({
+			id: layerId,
+			type: 'line',
+			source: layerId,
+			layout: { 'line-join': 'round', 'line-cap': 'round' },
+			paint: {
+				'line-color': options.color ?? '#000',
+				'line-width': options.width ?? 3,
+				'line-opacity': options.opacity ?? 1,
+				...(options.dashArray ? { 'line-dasharray': options.dashArray } : {}),
+			},
+		});
+		this.sources.add(layerId);
+		this.layers.add(layerId);
+
+		return {
+			id: layerId,
+			remove: () => this.remove(id),
+		};
+	}
+
+	addCircle(id: string, options: CircleOptions): MapLayer {
+		const layerId = this.scopeId(id);
+		if (this.map.getSource(layerId)) this.remove(id);
+
+		this.map.addSource(layerId, {
+			type: 'geojson',
+			data: {
+				type: 'Feature',
+				properties: {},
+				geometry: { type: 'Point', coordinates: options.center },
+			},
+		});
+		this.map.addLayer({
+			id: layerId,
+			type: 'circle',
+			source: layerId,
+			paint: {
+				'circle-radius': options.radiusPx ?? 6,
+				'circle-color': options.color ?? '#0b5ed7',
+				'circle-opacity': options.opacity ?? 1,
+				'circle-stroke-color': options.strokeColor ?? '#ffffff',
+				'circle-stroke-width': options.strokeWidth ?? 2,
+			},
+		});
+		this.sources.add(layerId);
+		this.layers.add(layerId);
+
+		return {
+			id: layerId,
+			remove: () => this.remove(id),
+		};
+	}
+
+	addMarker(id: string, options: MarkerOptions): Marker {
+		const scoped = this.scopeId(id);
+		const existing = this.markers.get(scoped);
+		if (existing) existing.remove();
+
+		let mlOptions: MLMarkerOptions | undefined;
+		if (options.iconUrl) {
+			const el = document.createElement('div');
+			el.className = options.className ?? 'lsv-marker';
+			el.style.backgroundImage = `url(${options.iconUrl})`;
+			const [w, h] = options.iconSize ?? [12, 12];
+			el.style.width = `${w}px`;
+			el.style.height = `${h}px`;
+			el.style.backgroundSize = '100%';
+			mlOptions = { element: el };
+		}
+
+		const marker = new maplibregl.Marker(mlOptions).setLngLat(options.lngLat as LngLatLike);
+
+		if (options.popupHtml) {
+			const popup = new maplibregl.Popup({ offset: 16, closeButton: false }).setHTML(
+				options.popupHtml,
+			);
+			marker.setPopup(popup);
+			marker.getElement().addEventListener('mouseenter', () => marker.togglePopup());
+			marker.getElement().addEventListener('mouseleave', () => marker.togglePopup());
+		}
+
+		marker.addTo(this.map);
+		this.markers.set(scoped, marker);
+
+		return {
+			setLngLat: (pos) => marker.setLngLat(pos as LngLatLike),
+			remove: () => this.remove(id),
+		};
+	}
+
+	remove(id: string): void {
+		const scoped = this.scopeId(id);
+		if (this.map.getLayer(scoped)) this.map.removeLayer(scoped);
+		if (this.map.getSource(scoped)) this.map.removeSource(scoped);
+		this.layers.delete(scoped);
+		this.sources.delete(scoped);
+		const marker = this.markers.get(scoped);
+		if (marker) {
+			marker.remove();
+			this.markers.delete(scoped);
+		}
+	}
+
+	clear(): void {
+		for (const id of Array.from(this.layers)) {
+			if (this.map.getLayer(id)) this.map.removeLayer(id);
+		}
+		for (const id of Array.from(this.sources)) {
+			if (this.map.getSource(id)) this.map.removeSource(id);
+		}
+		for (const marker of this.markers.values()) marker.remove();
+		this.layers.clear();
+		this.sources.clear();
+		this.markers.clear();
+	}
+
+	dispose(): void {
+		this.clear();
+	}
+}
+
+export class MapLibreMap implements IMap {
+	private map: MLMap;
+	private scenes = new Map<string, MapLibreScene>();
+	public readonly ready: Promise<void>;
+
+	constructor(init: MapInit) {
+		this.map = new maplibregl.Map({
+			container: init.container,
+			style: BASE_STYLES[init.baseLayer ?? 'osm'],
+			center: init.center,
+			zoom: init.zoom,
+		});
+
+		if (init.showNavigationControl !== false) {
+			this.map.addControl(new maplibregl.NavigationControl(), 'bottom-left');
+		}
+		if (init.showScaleControl !== false) {
+			this.map.addControl(new maplibregl.ScaleControl({ maxWidth: 100, unit: 'metric' }), 'bottom-right');
+		}
+
+		this.ready = new Promise((resolve) => this.map.once('load', () => resolve()));
+	}
+
+	on<E extends MapEvent>(event: E, handler: MapEventHandler<E>): () => void {
+		const wrapped = (e: unknown) => {
+			switch (event) {
+				case 'click':
+				case 'mousemove': {
+					const ev = e as maplibregl.MapMouseEvent;
+					(handler as MapEventHandler<'click'>)({
+						lngLat: { lat: ev.lngLat.lat, lng: ev.lngLat.lng },
+						originalEvent: ev.originalEvent,
+					});
+					break;
+				}
+				case 'move':
+					(handler as MapEventHandler<'move'>)({
+						center: [this.map.getCenter().lng, this.map.getCenter().lat],
+						zoom: this.map.getZoom(),
+					});
+					break;
+				case 'zoom':
+					(handler as MapEventHandler<'zoom'>)({ zoom: this.map.getZoom() });
+					break;
+				case 'load':
+					(handler as MapEventHandler<'load'>)(undefined as MapEventPayload['load']);
+					break;
+			}
+		};
+		this.map.on(event as 'click', wrapped);
+		return () => this.map.off(event as 'click', wrapped);
+	}
+
+	setCenter(pos: LngLatTuple, zoom?: number): void {
+		this.map.setCenter(pos);
+		if (zoom !== undefined) this.map.setZoom(zoom);
+	}
+
+	panTo(pos: LngLatTuple, durationMs?: number): void {
+		this.map.panTo(pos, durationMs ? { duration: durationMs } : undefined);
+	}
+
+	fitBounds(coords: LatLngTuple[], paddingPx = 50): void {
+		if (coords.length === 0) return;
+		const first: [number, number] = [coords[0][1], coords[0][0]];
+		const bounds = coords.reduce(
+			(b, c) => b.extend([c[1], c[0]] as [number, number]),
+			new maplibregl.LngLatBounds(first, first),
+		);
+		this.map.fitBounds(bounds, { padding: paddingPx });
+	}
+
+	getZoom(): number {
+		return this.map.getZoom();
+	}
+
+	setZoom(zoom: number): void {
+		this.map.setZoom(zoom);
+	}
+
+	setCursor(cursor: string | null): void {
+		this.map.getCanvas().style.cursor = cursor ?? '';
+	}
+
+	scene(name: string): Scene {
+		let scene = this.scenes.get(name);
+		if (!scene) {
+			scene = new MapLibreScene(name, this.map);
+			this.scenes.set(name, scene);
+		}
+		return scene;
+	}
+
+	disposeScene(name: string): void {
+		const scene = this.scenes.get(name);
+		if (!scene) return;
+		scene.dispose();
+		this.scenes.delete(name);
+	}
+
+	getRawInstance(): MLMap {
+		return this.map;
+	}
+
+	dispose(): void {
+		for (const s of this.scenes.values()) s.dispose();
+		this.scenes.clear();
+		this.map.remove();
+	}
+}
+
+export function createMapLibreMap(init: MapInit): IMap {
+	return new MapLibreMap(init);
+}

src/lib/map/tools/measure.ts

@@ -0,0 +1,75 @@
+import type { IMap } from '../core';
+import type { LatLngTuple } from '$domain';
+import { distHaversine } from '$domain';
+
+/**
+ * Library-agnostic measure tool. Click to drop points; each new point draws
+ * a segment and reports the running total distance in kilometers.
+ *
+ * Returns a disposer that removes all overlays and deactivates listeners.
+ */
+export interface MeasureHandle {
+	dispose(): void;
+	reset(): void;
+}
+
+export interface MeasureOptions {
+	onUpdate?: (totalKm: number, points: LatLngTuple[]) => void;
+	color?: string;
+	width?: number;
+	sceneName?: string;
+}
+
+export function startMeasure(map: IMap, options: MeasureOptions = {}): MeasureHandle {
+	const scene = map.scene(options.sceneName ?? 'measure');
+	const points: LatLngTuple[] = [];
+	let segmentCounter = 0;
+	let pointCounter = 0;
+	let total = 0;
+
+	map.setCursor('crosshair');
+
+	const off = map.on('click', (e) => {
+		const latlng: LatLngTuple = [e.lngLat.lat, e.lngLat.lng];
+		points.push(latlng);
+
+		scene.addMarker(`p-${pointCounter++}`, {
+			lngLat: [e.lngLat.lng, e.lngLat.lat],
+			iconSize: [8, 8],
+			className: 'lsv-measure-dot',
+		});
+
+		if (points.length > 1) {
+			const prev = points[points.length - 2];
+			total += distHaversine(
+				{ lat: prev[0], lng: prev[1] },
+				{ lat: latlng[0], lng: latlng[1] },
+			);
+			scene.addLine(`seg-${segmentCounter++}`, {
+				coords: [prev, latlng],
+				color: options.color ?? '#2563eb',
+				width: options.width ?? 2,
+			});
+		}
+
+		options.onUpdate?.(total, [...points]);
+	});
+
+	function reset() {
+		scene.clear();
+		points.length = 0;
+		total = 0;
+		segmentCounter = 0;
+		pointCounter = 0;
+		options.onUpdate?.(0, []);
+	}
+
+	return {
+		dispose() {
+			off();
+			map.setCursor(null);
+			map.disposeScene(options.sceneName ?? 'measure');
+		},
+		reset,
+	};
+}

src/lib/map/tools/selection.ts

@@ -0,0 +1,23 @@
+import type { IMap } from '../core';
+
+/**
+ * One-shot coordinate selection tool: next click reports a lat/lng and the
+ * tool disarms itself.
+ */
+export function startCoordinateSelection(
+	map: IMap,
+	onSelect: (coords: { lat: number; lng: number }) => void,
+): () => void {
+	map.setCursor('crosshair');
+
+	const off = map.on('click', (e) => {
+		map.setCursor(null);
+		off();
+		onSelect(e.lngLat);
+	});
+
+	return () => {
+		map.setCursor(null);
+		off();
+	};
+}

src/lib/state/index.ts

@@ -0,0 +1,2 @@
+export { persisted } from './persisted';
+export type { Serializer, PersistedOptions } from './persisted';

src/lib/state/persisted.ts

@@ -0,0 +1,131 @@
+import { writable, type Writable, type Updater } from 'svelte/store';
+import { browser } from '$app/environment';
+
+/**
+ * Writable store backed by localStorage, synced across tabs via
+ * BroadcastChannel. The store initializes with a snapshot from storage if
+ * present and falls back to `initial` otherwise. Subsequent writes are
+ * serialized to localStorage and broadcast to other tabs.
+ *
+ * Notes
+ * -----
+ * - Serialization uses JSON by default; pass custom `serializer` for Dates etc.
+ * - Reads on the server (or before hydration) return `initial` — no storage
+ *   access happens until the `browser` flag is true.
+ * - Removing the key from storage (via another tab or devtools) resets the
+ *   store to `initial` on the next notification.
+ * - A per-store "suppress rebroadcast" flag prevents a ping-pong loop when a
+ *   remote update arrives: the incoming `set` must not trigger a new
+ *   broadcast or we'd echo forever.
+ */
+
+export interface Serializer<T> {
+	parse: (raw: string) => T;
+	stringify: (value: T) => string;
+}
+
+const json: Serializer<unknown> = { parse: JSON.parse, stringify: JSON.stringify };
+
+export interface PersistedOptions<T> {
+	serializer?: Serializer<T>;
+	/**
+	 * Skip cross-tab sync if multiple stores must not share a channel or if a
+	 * store's value is too large to broadcast efficiently.
+	 */
+	syncTabs?: boolean;
+}
+
+const CHANNEL = 'leaflet-svelte:store';
+
+let channel: BroadcastChannel | null = null;
+function getChannel(): BroadcastChannel | null {
+	if (!browser) return null;
+	if (typeof BroadcastChannel === 'undefined') return null;
+	channel ??= new BroadcastChannel(CHANNEL);
+	return channel;
+}
+
+export function persisted<T>(
+	key: string,
+	initial: T,
+	options: PersistedOptions<T> = {},
+): Writable<T> {
+	const serializer = (options.serializer ?? (json as Serializer<T>)) as Serializer<T>;
+	const syncTabs = options.syncTabs ?? true;
+
+	const readFromStorage = (): T => {
+		if (!browser) return initial;
+		const raw = localStorage.getItem(key);
+		if (raw === null) return initial;
+		try {
+			return serializer.parse(raw);
+		} catch (e) {
+			console.warn(`[persisted] failed to parse "${key}":`, e);
+			return initial;
+		}
+	};
+
+	const store = writable<T>(readFromStorage());
+
+	const write = (value: T) => {
+		if (!browser) return;
+		try {
+			localStorage.setItem(key, serializer.stringify(value));
+		} catch (e) {
+			console.warn(`[persisted] failed to write "${key}":`, e);
+		}
+	};
+
+	let firstTick = true;
+	let remoteUpdate = false;
+
+	if (browser) {
+		store.subscribe((value) => {
+			// The first subscribe fires synchronously with the initial value. We
+			// already read it from storage, so re-writing it is a no-op; skipping
+			// also avoids a spurious broadcast to other tabs on every page load.
+			if (firstTick) {
+				firstTick = false;
+				return;
+			}
+			write(value);
+			if (syncTabs && !remoteUpdate) {
+				getChannel()?.postMessage({ key, value });
+			}
+		});
+
+		if (syncTabs) {
+			getChannel()?.addEventListener('message', (event) => {
+				if (event.data?.key !== key) return;
+				remoteUpdate = true;
+				try {
+					store.set(event.data.value);
+				} finally {
+					remoteUpdate = false;
+				}
+			});
+		}
+
+		window.addEventListener('storage', (event) => {
+			if (event.storageArea !== localStorage || event.key !== key) return;
+			remoteUpdate = true;
+			try {
+				if (event.newValue === null) {
+					store.set(initial);
+				} else {
+					store.set(serializer.parse(event.newValue));
+				}
+			} catch {
+				// ignore malformed writes from another tab
+			} finally {
+				remoteUpdate = false;
+			}
+		});
+	}
+
+	return {
+		subscribe: store.subscribe,
+		set: store.set,
+		update: (fn: Updater<T>) => store.update(fn),
+	};
+}

src/lib/ui/CollapsibleCard.svelte

@@ -0,0 +1,60 @@
+<script lang="ts">
+	import { Card, CardHeader, CardBody, Button, Icon } from '@sveltestrap/sveltestrap';
+	import type { Snippet } from 'svelte';
+
+	/**
+	 * Standardized collapsible panel card used by every side-panel feature.
+	 * The header shows a title and a caret; clicking the header toggles body
+	 * visibility. The `initialCollapsed` prop seeds state but callers can
+	 * drive it externally via `bind:collapsed` if they want to persist state.
+	 */
+	interface Props {
+		title?: string;
+		collapsed?: boolean;
+		headerClass?: string;
+		bodyClass?: string;
+		variant?: 'primary' | 'secondary' | 'light';
+		headerExtra?: Snippet;
+		children?: Snippet;
+	}
+
+	let {
+		title = '',
+		collapsed = $bindable(false),
+		headerClass = '',
+		bodyClass = '',
+		variant = 'primary',
+		headerExtra,
+		children,
+	}: Props = $props();
+
+	function toggle() {
+		collapsed = !collapsed;
+	}
+</script>
+
+<Card class="mb-2 collapsible-card">
+	<CardHeader
+		class="d-flex justify-content-between align-items-center card-header p-1 px-3 bg-{variant} text-white {headerClass}"
+		style="cursor:pointer;">
+		<button
+			type="button"
+			class="d-flex w-100 justify-content-between align-items-center bg-transparent border-0 p-0 text-white"
+			style="width:100%;"
+			aria-expanded={!collapsed}
+			onclick={toggle}>
+			<b class="card-title mb-0 text-white p-0">{title}</b>
+			<span class="d-flex align-items-center gap-2">
+				{#if headerExtra}{@render headerExtra()}{/if}
+				<Button class="p-0" size="sm" color={variant}>
+					<Icon name={collapsed ? 'caret-left-fill' : 'caret-down-fill'} class="text-white" />
+				</Button>
+			</span>
+		</button>
+	</CardHeader>
+	{#if !collapsed}
+		<CardBody class={bodyClass}>
+			{@render children?.()}
+		</CardBody>
+	{/if}
+</Card>

src/lib/ui/ConfirmationPrompt.svelte

@@ -0,0 +1,49 @@
+<script lang="ts">
+	import { Modal, ModalHeader, ModalBody, ModalFooter, Button } from '@sveltestrap/sveltestrap';
+	import type { Snippet } from 'svelte';
+
+	interface Props {
+		isOpen?: boolean;
+		title?: string;
+		confirmText?: string;
+		cancelText?: string;
+		confirmVariant?: string;
+		cancelVariant?: string;
+		onconfirm?: () => void;
+		oncancel?: () => void;
+		children?: Snippet;
+	}
+
+	let {
+		isOpen = $bindable(false),
+		title = 'Confirm',
+		confirmText = 'Confirm',
+		cancelText = 'Cancel',
+		confirmVariant = 'primary',
+		cancelVariant = 'secondary',
+		onconfirm,
+		oncancel,
+		children,
+	}: Props = $props();
+
+	function handleConfirm() {
+		onconfirm?.();
+		isOpen = false;
+	}
+
+	function handleCancel() {
+		oncancel?.();
+		isOpen = false;
+	}
+</script>
+
+<Modal {isOpen} toggle={handleCancel} fade={false} backdrop={true}>
+	<ModalHeader toggle={handleCancel}>{title}</ModalHeader>
+	<ModalBody>
+		{#if children}{@render children()}{/if}
+	</ModalBody>
+	<ModalFooter>
+		<Button color={cancelVariant} on:click={handleCancel}>{cancelText}</Button>
+		<Button color={confirmVariant} on:click={handleConfirm}>{confirmText}</Button>
+	</ModalFooter>
+</Modal>

src/lib/ui/EditableCell.svelte

@@ -0,0 +1,56 @@
+<script lang="ts">
+	interface Props {
+		value?: number | null;
+		onchange?: () => void;
+		valuePrefix?: string;
+		valueSuffix?: string;
+		emptyValue?: number | null;
+		emptyPlaceholder?: string;
+	}
+
+	let {
+		value = $bindable(),
+		onchange = () => {},
+		valuePrefix = '',
+		valueSuffix = '',
+		emptyValue = null,
+		emptyPlaceholder = '-',
+	}: Props = $props();
+
+	let editing = $state(false);
+	let inputEl: HTMLInputElement | undefined = $state();
+
+	$effect(() => {
+		if (editing && inputEl) inputEl.focus();
+	});
+
+	function start() {
+		editing = true;
+	}
+
+	function stop() {
+		editing = false;
+		onchange();
+	}
+
+	function keydown(event: KeyboardEvent) {
+		if (event.key === 'Enter') stop();
+		else if (event.key === 'Escape') editing = false;
+	}
+</script>
+
+<td onclick={start} onfocusin={start}>
+	{#if editing}
+		<input
+			type="number"
+			class="form-control form-control-sm border-0"
+			bind:this={inputEl}
+			bind:value
+			onblur={stop}
+			onkeydown={keydown} />
+	{:else if value === emptyValue || value === null || value === undefined}
+		<span class="text-muted">{emptyPlaceholder}</span>
+	{:else}
+		<span>{valuePrefix}{value}{valueSuffix}</span>
+	{/if}
+</td>

src/lib/ui/LabelGroup.svelte

@@ -0,0 +1,33 @@
+<script lang="ts">
+	import type { HTMLAttributes } from 'svelte/elements';
+	import type { Snippet } from 'svelte';
+
+	interface Props extends HTMLAttributes<HTMLDivElement> {
+		id?: string;
+		label?: string;
+		children?: Snippet;
+	}
+
+	let { id, label = '', class: className = '', children, ...rest }: Props = $props();
+</script>
+
+<div {id} class="label-group {className}" {...rest}>
+	<div class="btn btn-link p-0 d-flex align-items-center w-100 text-decoration-none label-header">
+		<div class="border-top" style="width: 10px;"></div>
+		<span class="small text-nowrap ms-2">{label}</span>
+		<div class="flex-fill border-top ms-2"></div>
+	</div>
+
+	<div class="p-2 border border-top-0 label-content">
+		{@render children?.()}
+	</div>
+</div>
+
+<style>
+	.label-header {
+		margin-bottom: -0.75em;
+	}
+	.label-content {
+		padding-top: 0.75em !important;
+	}
+</style>

src/lib/ui/PanelContainer.svelte

@@ -0,0 +1,38 @@
+<script lang="ts">
+	import type { Snippet } from 'svelte';
+
+	/**
+	 * Fixed-position side panel attached to the map. Stops mouse/touch
+	 * propagation so interactions inside the panel don't pan the map.
+	 */
+	interface Props {
+		position?: 'left' | 'right';
+		children?: Snippet;
+	}
+
+	let { position = 'left', children }: Props = $props();
+
+	let element: HTMLDivElement | null = $state(null);
+
+	export function getElement(): HTMLDivElement | null {
+		return element;
+	}
+
+	function stop(e: Event) {
+		e.stopPropagation();
+	}
+</script>
+
+<!-- svelte-ignore a11y_click_events_have_key_events -->
+<!-- svelte-ignore a11y_no_noninteractive_element_interactions -->
+<div
+	bind:this={element}
+	class="panel-container-{position}"
+	onclick={stop}
+	ondblclick={stop}
+	onmousedown={stop}
+	ontouchstart={stop}
+	onwheel={stop}
+	role="complementary">
+	{@render children?.()}
+</div>

src/lib/ui/SelectSearchable.svelte

@@ -0,0 +1,191 @@
+<script lang="ts" generics="V">
+	import { onMount } from 'svelte';
+	import type { HTMLAttributes } from 'svelte/elements';
+
+	type Option = { value: V; label: string };
+
+	interface Props extends HTMLAttributes<HTMLDivElement> {
+		id?: string;
+		options?: Option[];
+		selected?: V | null;
+		placeholder?: string;
+		searchPlaceholder?: string;
+		disabled?: boolean;
+		clearable?: boolean;
+		onChange?: (value: V | null) => void;
+	}
+
+	let {
+		id = 'select-searchable',
+		options = [],
+		selected = $bindable<V | null>(null),
+		placeholder = 'Select an option...',
+		searchPlaceholder = 'Search...',
+		disabled = false,
+		clearable = false,
+		onChange,
+		class: className = '',
+		...restProps
+	}: Props = $props();
+
+	let isOpen = $state(false);
+	let searchTerm = $state('');
+	let selectElement = $state<HTMLElement>();
+	let dropdownElement = $state<HTMLElement>();
+	let searchInput = $state<HTMLInputElement>();
+	let dropdownStyle = $state('');
+
+	let filteredOptions = $derived(
+		options.filter((o) => o.label.toLowerCase().includes(searchTerm.toLowerCase())),
+	);
+
+	let selectedLabel = $derived(options.find((o) => o.value === selected)?.label ?? '');
+
+	function positionDropdown() {
+		if (!selectElement || !dropdownElement) return;
+		const rect = selectElement.getBoundingClientRect();
+		const height = dropdownElement.offsetHeight;
+		const spaceBelow = window.innerHeight - rect.bottom;
+		const spaceAbove = rect.top;
+		const placeBelow = spaceBelow >= height || spaceBelow >= spaceAbove;
+		dropdownStyle = [
+			'position:fixed',
+			`top:${placeBelow ? rect.bottom : 'auto'}${typeof rect.bottom === 'number' && placeBelow ? 'px' : ''}`,
+			`bottom:${placeBelow ? 'auto' : `${window.innerHeight - rect.top}px`}`,
+			`left:${rect.left}px`,
+			`min-width:${rect.width}px`,
+		].join(';');
+	}
+
+	function toggle() {
+		if (disabled) return;
+		isOpen = !isOpen;
+		if (isOpen) {
+			searchTerm = '';
+			queueMicrotask(() => {
+				positionDropdown();
+				searchInput?.focus();
+			});
+		}
+	}
+
+	function pick(option: Option) {
+		selected = option.value;
+		isOpen = false;
+		searchTerm = '';
+		onChange?.(option.value);
+	}
+
+	function clear(e: Event) {
+		e.stopPropagation();
+		selected = null;
+		onChange?.(null);
+	}
+
+	function handleOutside(e: MouseEvent) {
+		if (selectElement && !selectElement.contains(e.target as Node)) isOpen = false;
+	}
+
+	$effect(() => {
+		if (!isOpen) return;
+		const listener = () => positionDropdown();
+		window.addEventListener('scroll', listener, true);
+		window.addEventListener('resize', listener);
+		return () => {
+			window.removeEventListener('scroll', listener, true);
+			window.removeEventListener('resize', listener);
+		};
+	});
+
+	onMount(() => positionDropdown());
+</script>
+
+<svelte:window onclick={handleOutside} />
+
+<div
+	bind:this={selectElement}
+	{id}
+	class="form-control form-select select-container {className}"
+	class:disabled
+	class:show={isOpen}
+	role="combobox"
+	aria-haspopup="listbox"
+	aria-expanded={isOpen}
+	tabindex={disabled ? -1 : 0}
+	onclick={toggle}
+	onkeydown={(e) => e.key === 'Enter' && toggle()}
+	{...restProps}>
+	<span class:text-muted={selected == null}>{selectedLabel || placeholder}</span>
+
+	{#if clearable && selected != null}
+		<button type="button" class="clear-btn" tabindex="-1" aria-label="Clear selection" onclick={clear}>
+			&#10005;
+		</button>
+	{/if}
+
+	{#if isOpen}
+		<div class="pt-0 dropdown-menu show" bind:this={dropdownElement} style={dropdownStyle}>
+			<div class="p-2">
+				<input
+					bind:this={searchInput}
+					type="text"
+					class="form-control form-control-sm"
+					placeholder={searchPlaceholder}
+					bind:value={searchTerm}
+					onclick={(e) => e.stopPropagation()} />
+			</div>
+			<div class="options-list">
+				{#each filteredOptions as option}
+					<button
+						type="button"
+						class="dropdown-item small"
+						class:active={option.value === selected}
+						onclick={(e) => {
+							e.stopPropagation();
+							pick(option);
+						}}
+						role="option"
+						aria-selected={option.value === selected}>
+						{option.label}
+					</button>
+				{:else}
+					<div class="dropdown-item text-muted disabled">No options found</div>
+				{/each}
+			</div>
+		</div>
+	{/if}
+</div>
+
+<style>
+	.select-container {
+		position: relative;
+		cursor: default;
+	}
+	.dropdown-menu {
+		z-index: 1000;
+		width: max-content;
+	}
+	.options-list {
+		max-height: 40vh;
+		overflow-y: auto;
+	}
+	.clear-btn {
+		position: absolute;
+		top: 50%;
+		right: 2rem;
+		transform: translateY(-50%);
+		background: none;
+		border: none;
+		color: #2a2a2a;
+		font-size: 1rem;
+		cursor: pointer;
+		z-index: 2;
+		padding: 0;
+		display: flex;
+		align-items: center;
+		justify-content: center;
+	}
+	.clear-btn:focus {
+		outline: none;
+	}
+</style>

src/lib/ui/SpoilerGroup.svelte

@@ -0,0 +1,56 @@
+<script lang="ts">
+	import type { HTMLAttributes } from 'svelte/elements';
+	import type { Snippet } from 'svelte';
+
+	interface Props extends HTMLAttributes<HTMLDivElement> {
+		id?: string;
+		label?: string;
+		expanded?: boolean;
+		children?: Snippet;
+	}
+
+	let {
+		id,
+		label = '',
+		expanded = $bindable(false),
+		class: className = '',
+		children,
+		...rest
+	}: Props = $props();
+</script>
+
+<div {id} class="spoiler-group {className}" {...rest}>
+	<button
+		type="button"
+		class="btn btn-link p-0 d-flex align-items-center w-100 text-decoration-none spoiler-header"
+		onclick={() => (expanded = !expanded)}
+		aria-expanded={expanded}>
+		<span class="font-monospace fs-5 ms-1 fw-bold text-muted spoiler-icon">{expanded ? '−' : '+'}</span>
+		<span class="small text-nowrap ms-1">{label}</span>
+		<div class="flex-fill border-top ms-1"></div>
+	</button>
+
+	{#if expanded}
+		<div class="p-2 border border-top-0 spoiler-content">
+			{@render children?.()}
+		</div>
+	{:else}
+		<div style="padding-top: 0.75em;"></div>
+	{/if}
+</div>
+
+<style>
+	.spoiler-header {
+		margin-bottom: -0.75em;
+	}
+	.spoiler-content {
+		padding-top: 0.75em !important;
+	}
+	.spoiler-icon {
+		line-height: 1;
+		padding-bottom: 0.1em;
+	}
+	.btn:hover .spoiler-icon {
+		color: var(--bs-dark) !important;
+	}
+</style>

src/lib/ui/TabBar.svelte

@@ -0,0 +1,48 @@
+<script lang="ts" generics="T extends string">
+	import { Icon } from '@sveltestrap/sveltestrap';
+
+	interface Tab {
+		id: T;
+		icon: string;
+		label: string;
+	}
+
+	interface Props {
+		tabs: Tab[];
+		active: T;
+		justify?: 'start' | 'center' | 'end';
+	}
+
+	let { tabs, active = $bindable(), justify = 'start' }: Props = $props();
+</script>
+
+<div class="d-flex justify-content-{justify} mb-1 gap-1">
+	{#each tabs as tab (tab.id)}
+		<button
+			type="button"
+			class="custom-tab btn btn-outline-primary d-flex flex-column align-items-center justify-content-center px-1"
+			class:active={active === tab.id}
+			onclick={() => (active = tab.id)}>
+			<Icon name={tab.icon} class="custom-tab-icon" />
+			<span class="custom-tab-label">{tab.label}</span>
+		</button>
+	{/each}
+</div>
+
+<style>
+	.custom-tab {
+		width: 4.5rem;
+		background: var(--bs-body-bg);
+	}
+
+	.custom-tab.active,
+	.custom-tab:hover {
+		background-color: var(--bs-primary) !important;
+		color: var(--bs-btn-active-color);
+	}
+
+	.custom-tab-label {
+		font-size: 0.66rem;
+		font-weight: 500;
+	}
+</style>

src/lib/ui/Toast.svelte

@@ -0,0 +1,40 @@
+<script lang="ts">
+	import { Toast, ToastBody, ToastHeader, Icon } from '@sveltestrap/sveltestrap';
+	import { toasts, removeToast, type ToastColor } from './toasts';
+
+	const ICONS: Record<ToastColor, string> = {
+		primary: 'info-circle-fill',
+		secondary: 'info-circle-fill',
+		success: 'check-circle-fill',
+		danger: 'exclamation-triangle-fill',
+		warning: 'exclamation-circle-fill',
+		info: 'info-circle-fill',
+		light: 'lightbulb',
+		dark: 'question',
+	};
+</script>
+
+<div class="toast-container position-fixed bottom-0 end-0 p-3">
+	{#each $toasts as toast (toast.id)}
+		<Toast
+			isOpen={true}
+			autohide={!toast.persistent}
+			delay={5000}
+			color={toast.color}
+			on:close={() => removeToast(toast.id)}>
+			<ToastHeader toggle={() => removeToast(toast.id)} class={`text-${toast.color}`}>
+				<Icon slot="icon" name={ICONS[toast.color]} class="me-2" color={toast.color} />
+				{toast.header}
+			</ToastHeader>
+			<ToastBody>
+				{toast.body}
+			</ToastBody>
+		</Toast>
+	{/each}
+</div>
+
+<style>
+	.toast-container {
+		z-index: 1090;
+	}
+</style>

src/lib/ui/editor/ListEditor.svelte

@@ -0,0 +1,338 @@
+<script module lang="ts">
+	export interface ListEditorConfig {
+		showTable?: boolean;
+		closeOnSave?: boolean;
+		closeOnDelete?: boolean;
+		searchBy?: string[];
+		labels?: {
+			item?: string;
+			itemGenitive?: string;
+			items?: string;
+			add?: string;
+			edit?: string;
+			save?: string;
+			update?: string;
+			delete?: string;
+			cancel?: string;
+			close?: string;
+			searchPlaceholder?: string;
+		};
+	}
+
+	export interface ListEditorApi<T> {
+		save: (item: T) => Promise<T>;
+		update: (item: T) => Promise<T>;
+		delete: (item: T) => Promise<void>;
+	}
+</script>
+
+<script lang="ts" generics="T extends { id: number; name: string }">
+	import { TableHandler } from '@vincjo/datatables';
+	import {
+		Modal,
+		Button,
+		Alert,
+		Icon,
+		Pagination,
+		PaginationItem,
+		PaginationLink,
+		Input,
+		InputGroup,
+	} from '@sveltestrap/sveltestrap';
+	import { addToast } from '../toasts';
+	import ConfirmationPrompt from '../ConfirmationPrompt.svelte';
+	import type { Snippet } from 'svelte';
+
+	interface Props {
+		isOpen?: boolean;
+		items?: T[];
+		itemFactory: () => T;
+		api: ListEditorApi<T>;
+		config?: ListEditorConfig;
+		onClose?: () => void;
+		onSave?: (item: T) => void;
+		onSelect?: (item: T) => void;
+		tableHeader: Snippet;
+		tableRow: Snippet<[{ row: T }]>;
+		formFields: Snippet<[{ item: T }]>;
+	}
+
+	const DEFAULT_LABELS = {
+		item: 'item',
+		itemGenitive: 'item',
+		items: 'items',
+		add: 'Add',
+		edit: 'Edit',
+		save: 'Save',
+		update: 'Update',
+		delete: 'Delete',
+		cancel: 'Cancel',
+		close: 'Close',
+		searchPlaceholder: 'Search...',
+	};
+
+	let {
+		isOpen = $bindable(false),
+		items = $bindable([] as T[]),
+		itemFactory,
+		api,
+		config = {},
+		onClose = () => {},
+		onSave = (_i: T) => {},
+		onSelect = (_i: T) => {},
+		tableHeader,
+		tableRow,
+		formFields,
+	}: Props = $props();
+
+	const labels = $derived({ ...DEFAULT_LABELS, ...(config.labels ?? {}) });
+	const searchBy = $derived((config.searchBy ?? ['name']) as (keyof T)[]);
+	const showTableProp = $derived(config.showTable ?? false);
+
+	let isEditing = $state(false);
+	let isAlertVisible = $state(false);
+	let isConfirmationVisible = $state(false);
+	let isTableVisible = $state(config.showTable ?? false);
+	let alertText = $state('');
+	let selectedItem = $state<T | null>(null);
+	let currentItem = $state<T>(itemFactory());
+
+	const table = $derived(new TableHandler(items, { rowsPerPage: 10 }));
+	const search = $derived(table.createSearch(searchBy));
+
+	$effect(() => {
+		table.setRows(items);
+	});
+
+	export function open(item: T | null = null, showTable: boolean = showTableProp) {
+		if (item) {
+			handleEdit(item);
+		} else {
+			resetForm(false);
+		}
+		isOpen = true;
+		isTableVisible = showTable;
+	}
+
+	function close() {
+		isOpen = false;
+		onClose();
+	}
+
+	function handleEdit(item: T) {
+		selectedItem = item;
+		currentItem = { ...item };
+		isEditing = true;
+	}
+
+	function resetForm(clearSelection = true) {
+		if (clearSelection) selectedItem = null;
+		currentItem = itemFactory();
+		isEditing = false;
+		hideAlert();
+	}
+
+	function handleSelect(item: T) {
+		onSelect(item);
+		close();
+	}
+
+	async function handleSave() {
+		try {
+			if (isEditing && selectedItem) {
+				const updated = await api.update(currentItem);
+				items = items.map((i) => (i.id === updated.id ? updated : i));
+				toastOk('updated', updated.name);
+				onSave(updated);
+			} else {
+				const saved = await api.save(currentItem);
+				items = [...items, saved];
+				toastOk('saved', saved.name);
+				onSave(saved);
+			}
+			resetForm();
+			if (config.closeOnSave) close();
+		} catch (error: unknown) {
+			showAlert(`Error: ${(error as Error).message}`);
+		}
+	}
+
+	function confirmDelete(item: T) {
+		selectedItem = item;
+		isConfirmationVisible = true;
+	}
+
+	async function handleDelete() {
+		if (!selectedItem) return;
+		try {
+			await api.delete(selectedItem);
+			items = items.filter((i) => i.id !== selectedItem!.id);
+			toastOk('deleted', selectedItem.name);
+			if (config.closeOnDelete) close();
+		} catch (error: unknown) {
+			showAlert(`Error: ${(error as Error).message}`);
+		} finally {
+			isConfirmationVisible = false;
+			resetForm();
+		}
+	}
+
+	function showAlert(message: string) {
+		isAlertVisible = true;
+		alertText = message;
+	}
+
+	function hideAlert() {
+		isAlertVisible = false;
+		alertText = '';
+	}
+
+	function toastOk(action: string, name: string) {
+		const itemLabel = labels.item.charAt(0).toUpperCase() + labels.item.slice(1);
+		addToast({
+			header: `${itemLabel} ${action}`,
+			body: `${itemLabel} "${name}" ${action}.`,
+			color: 'success',
+		});
+	}
+
+	const modalTitle = $derived(
+		isEditing
+			? `${labels.edit} ${labels.itemGenitive}`
+			: isTableVisible
+				? `${labels.items}`
+				: `${labels.add} ${labels.itemGenitive}`,
+	);
+
+	const submitButtonText = $derived(isEditing ? labels.update : labels.save);
+</script>
+
+<Modal
+	{isOpen}
+	toggle={close}
+	size="lg"
+	fade={false}
+	backdrop={true}
+	scrollable
+	class={isConfirmationVisible ? 'modal-tinted' : ''}>
+	<div class="modal-header">
+		<h5 class="modal-title">{modalTitle}</h5>
+		<button type="button" class="btn-close" onclick={close} aria-label="Close"></button>
+	</div>
+	<div class="modal-body">
+		{#if isTableVisible}
+			<div class="position-relative mb-2">
+				<Input
+					type="text"
+					class="form-control-sm pe-5"
+					placeholder={labels.searchPlaceholder}
+					bind:value={search.value}
+					oninput={() => search.set()} />
+				{#if search.value}
+					<Button
+						size="sm"
+						color="white"
+						class="position-absolute top-50 end-0 translate-middle-y me-2 rounded-circle d-flex align-items-center justify-content-center"
+						style="width: 16px; height: 16px; border: none; background: var(--bs-secondary); color: var(--bs-white);"
+						onclick={() => {
+							search.value = '';
+							search.set();
+						}}>
+						<Icon name="x" style="font-size: 16px;" />
+					</Button>
+				{/if}
+			</div>
+			<div bind:this={table.element} class="table-responsive">
+				<table class="table table-sm">
+					<thead>
+						{@render tableHeader()}
+					</thead>
+					<tbody>
+						{#each table.rows as row (row.id)}
+							<tr>
+								{@render tableRow({ row: row as T })}
+								<td class="fit">
+									<InputGroup size="sm" class="d-flex gap-1 flex-nowrap">
+										<Button
+											size="sm"
+											color="secondary"
+											onclick={() => handleSelect(row as T)}
+											class="p-0 border-0 bg-transparent text-success px-1">
+											<Icon name="check-lg" />
+										</Button>
+										<Button
+											size="sm"
+											color="primary"
+											onclick={() => handleEdit(row as T)}
+											class="p-0 border-0 bg-transparent text-primary px-1">
+											<Icon name="pencil" />
+										</Button>
+										<Button
+											size="sm"
+											color="danger"
+											onclick={() => confirmDelete(row as T)}
+											class="p-0 border-0 bg-transparent text-danger px-1">
+											<Icon name="trash" />
+										</Button>
+									</InputGroup>
+								</td>
+							</tr>
+						{/each}
+					</tbody>
+				</table>
+			</div>
+			<Pagination aria-label="Page navigation" size="sm">
+				<PaginationItem>
+					<PaginationLink previous onclick={() => table.setPage('previous')} />
+				</PaginationItem>
+				{#each table.pagesWithEllipsis as page}
+					<PaginationItem active={table.currentPage === page}>
+						<PaginationLink onclick={() => table.setPage(page)}>{page}</PaginationLink>
+					</PaginationItem>
+				{/each}
+				<PaginationItem>
+					<PaginationLink next onclick={() => table.setPage('next')} />
+				</PaginationItem>
+			</Pagination>
+			<hr />
+		{/if}
+
+		<div>
+			<Alert color="danger" isOpen={isAlertVisible} toggle={hideAlert} fade={false} class="mb-2">
+				<Icon name="exclamation-triangle" class="me-2" />
+				{alertText}
+			</Alert>
+			<form
+				onsubmit={(e) => {
+					e.preventDefault();
+					handleSave();
+				}}>
+				{@render formFields({ item: currentItem })}
+				<div class="d-grid gap-2 d-md-flex mt-3">
+					<Button type="submit" color="success" size="sm">{submitButtonText}</Button>
+					{#if isEditing}
+						<Button size="sm" type="button" color="secondary" onclick={() => resetForm()}>
+							{labels.cancel}
+						</Button>
+						<Button color="danger" size="sm" type="button" onclick={() => confirmDelete(currentItem)}>
+							{labels.delete}
+						</Button>
+					{:else}
+						<Button color="secondary" size="sm" type="button" onclick={close}>{labels.close}</Button>
+					{/if}
+				</div>
+			</form>
+		</div>
+	</div>
+</Modal>
+
+<ConfirmationPrompt
+	bind:isOpen={isConfirmationVisible}
+	title={`${labels.delete} ${labels.itemGenitive}`}
+	confirmText={labels.delete}
+	cancelText={labels.cancel}
+	confirmVariant="danger"
+	onconfirm={handleDelete}
+	oncancel={() => (isConfirmationVisible = false)}>
+	<p>Delete "{selectedItem?.name}"?</p>
+</ConfirmationPrompt>

src/lib/ui/index.ts

@@ -0,0 +1,13 @@
+export { default as CollapsibleCard } from './CollapsibleCard.svelte';
+export { default as PanelContainer } from './PanelContainer.svelte';
+export { default as TabBar } from './TabBar.svelte';
+export { default as Toast } from './Toast.svelte';
+export { default as ConfirmationPrompt } from './ConfirmationPrompt.svelte';
+export { default as SelectSearchable } from './SelectSearchable.svelte';
+export { default as SpoilerGroup } from './SpoilerGroup.svelte';
+export { default as LabelGroup } from './LabelGroup.svelte';
+export { default as EditableCell } from './EditableCell.svelte';
+export { default as ListEditor } from './editor/ListEditor.svelte';
+export type { ListEditorConfig, ListEditorApi } from './editor/ListEditor.svelte';
+export { addToast, removeToast, toasts } from './toasts';
+export type { Toast as ToastMessage, ToastColor, ToastInit } from './toasts';

src/lib/ui/toasts.ts

@@ -0,0 +1,54 @@
+import { writable } from 'svelte/store';
+
+export type ToastColor =
+	| 'primary'
+	| 'secondary'
+	| 'success'
+	| 'danger'
+	| 'warning'
+	| 'info'
+	| 'light'
+	| 'dark';
+
+export interface Toast {
+	id: string;
+	header: string;
+	body: string;
+	color: ToastColor;
+	persistent: boolean;
+	onRemove?: (id: string) => void;
+}
+
+export interface ToastInit {
+	header: string;
+	body: string;
+	color?: ToastColor;
+	persistent?: boolean;
+	onRemove?: (id: string) => void;
+}
+
+export const toasts = writable<Toast[]>([]);
+
+export function addToast(init: ToastInit): string {
+	const id = crypto.randomUUID();
+	toasts.update((all) => [
+		...all,
+		{
+			id,
+			header: init.header,
+			body: init.body,
+			color: init.color ?? 'info',
+			persistent: init.persistent ?? false,
+			onRemove: init.onRemove,
+		},
+	]);
+	return id;
+}
+
+export function removeToast(id: string): void {
+	toasts.update((all) => {
+		const t = all.find((x) => x.id === id);
+		t?.onRemove?.(id);
+		return all.filter((x) => x.id !== id);
+	});
+}

src/routes/+layout.svelte

@@ -0,0 +1,22 @@
+<script lang="ts">
+	import '../app.css';
+	import { onMount } from 'svelte';
+	import { initI18n } from '$i18n';
+	import { authStore } from '$auth/store';
+	import ToastContainer from '$ui/Toast.svelte';
+
+	let { children } = $props();
+
+	let ready = $state(false);
+
+	onMount(async () => {
+		await initI18n();
+		await authStore.refresh().catch(() => {});
+		ready = true;
+	});
+</script>
+
+{#if ready}
+	{@render children?.()}
+{/if}
+<ToastContainer />

src/routes/+layout.ts

@@ -0,0 +1,5 @@
+// Pure SPA: all rendering happens in the browser against a Django REST backend.
+// Disable SSR and prerender globally so every route is just a client-side chunk.
+export const ssr = false;
+export const prerender = false;
+export const trailingSlash = 'ignore';

src/routes/+page.svelte

@@ -1,7 +1,22 @@
-<script>
-    import Map from './leaflet.svelte';
+<script lang="ts">
+	import { onMount } from 'svelte';
+	import { goto } from '$app/navigation';
+	import { authStore } from '$auth';
+
+	onMount(() => {
+		// Root route funnels users into the predict workspace by default. Once
+		// we have a proper landing page this can render marketing content
+		// instead of redirecting.
+		const unsub = authStore.subscribe((state) => {
+			if (state.status === 'authenticated') goto('/predict');
+			else if (state.status === 'anonymous') goto('/login');
+		});
+		return () => unsub();
+	});
 </script>
 
-<main>
-    <Map />
-</main>
+<div class="d-flex justify-content-center align-items-center" style="height: 100vh;">
+	<div class="spinner-border text-primary" role="status">
+		<span class="visually-hidden">Loading...</span>
+	</div>
+</div>

src/routes/+page.ts

@@ -1 +0,0 @@
-export const ssr =false;

src/routes/leaflet.svelte

@@ -1,548 +0,0 @@
-<script>
-  import { onMount } from 'svelte';
-  import * as L from 'leaflet';
-  import 'leaflet/dist/leaflet.css';
-
-  /**
-     * @type {{ removeLayer: (arg0: any) => void; setView: (arg0: number[], arg1: any) => void; getZoom: () => any; on: (arg0: string, arg1: (e: any) => void) => void; }}
-     */
-  let map;
-  let mouseLat = 0;
-  let mouseLng = 0;
-  /**
-     * @type {null}
-     */
-  let marker = null;
-
-  let startPoint = 'Custom';
-  let startHeight = 0;
-  let startTime = '13:13';
-  let startDate = new Date(2025, 2, 24);
-  let ascentRate = 5;
-  let burstAltitude = 30000;
-  let flightProfile = 'Normal';
-  let descentRate = 5;
-  let forecastMode = 'Single';
-  let inputLat = '56.3576';
-  let inputLng = '39.8666';
-
-  let showBurstCalculator = false;
-  let payloadMass = 1500;
-  let balloonMass = 1000;
-  let desiredBurstAltitude = 33000;
-  let desiredAscentRate = 2.33;
-
-  let burstAltitudeResult = 33000;
-  let timeToBurst = 236;
-  let initialVolume = 2.66;
-  let ascentRateResult = 2.33;
-  let liftForce = 1733;
-  let volumeLiters = 2662;
-  let volumeCubicFeet = 94.0;
-
-  const toggleBurstCalculator = () => {
-    showBurstCalculator = !showBurstCalculator;
-  };
-
-  const calculateBurst = () => {
-    // In a real app, you would implement actual calculations here
-    // These are just placeholder values matching your image
-    burstAltitudeResult = desiredBurstAltitude;
-    timeToBurst = 236;
-    initialVolume = 2.66;
-    ascentRateResult = desiredAscentRate;
-    liftForce = 1733;
-    volumeLiters = 2662;
-    volumeCubicFeet = 94.0;
-  };
-
-  const updateMapPosition = () => {
-    const lat = parseFloat(inputLat);
-    const lng = parseFloat(inputLng);
-    
-    if (isNaN(lat)) {
-      alert("Please enter a valid latitude");
-      return;
-    }
-    if (isNaN(lng)) {
-      alert("Please enter a valid longitude");
-      return;
-    }
-    if (lat < -90 || lat > 90) {
-      alert("Latitude must be between -90 and 90");
-      return;
-    }
-    if (lng < -180 || lng > 180) {
-      alert("Longitude must be between -180 and 180");
-      return;
-    }
-    
-    // Remove existing marker if it exists
-    if (marker) {
-      map.removeLayer(marker);
-    }
-    
-    // Create new marker
-    marker = L.marker([lat, lng]).addTo(map)
-      .bindPopup("Launch Point");
-    
-    // Center map on new coordinates
-    map.setView([lat, lng], map.getZoom());
-  };
-  
-  onMount(() => {
-    map = L.map('map').setView([51.505, -0.09], 13);
-    
-    L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
-      attribution: '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
-    }).addTo(map);
-
-    map.on('mousemove', (e) => {
-      mouseLat = e.latlng.lat.toFixed(6);
-      mouseLng = e.latlng.lng.toFixed(6);
-    });
-
-    marker = L.marker([56.3576, 39.8666]).addTo(map)
-    .bindPopup(() => {
-        return `
-          <b>Launch Point</b><br>, Lat: ${marker.getLatLng().lat.toFixed(6)}<br>, Long: ${marker.getLatLng().lng.toFixed(6)}<br>
-        `;
-      });
-  });
-
-  // Forecast request function
-  const getForecast = async () => {
-    // Create request object
-    const request = {
-      ascent_rate: parseFloat(ascentRate),
-      burst_altitude: parseFloat(burstAltitude),
-      dataset: new Date().toISOString(), // Current time as dataset timestamp
-      descent_rate: parseFloat(descentRate),
-      format: "json",
-      launch_altitude: parseFloat(startHeight),
-      launch_datetime: new Date(
-        `${startDate.getFullYear()}-${startDate.getMonth() + 1}-${startDate.getDate()}T${startTime}:00Z`
-      ).toISOString(),
-      launch_latitude: parseFloat(inputLat),
-      launch_longitude: parseFloat(inputLng),
-      profile: flightProfile === 'Normal' ? 'standard_profile' : 'custom_profile',
-      version: 2
-    };
-
-    console.log("Sending request:", request);
-
-    try {
-      // Example POST request - replace with your actual API endpoint
-      const response = await fetch('https://api.example.com/forecast', {
-        method: 'POST',
-        headers: {
-          'Content-Type': 'application/json',
-        },
-        body: JSON.stringify(request)
-      });
-
-      if (!response.ok) {
-        throw new Error(`HTTP error! status: ${response.status}`);
-      }
-
-      const data = await response.json();
-      console.log("Forecast response:", data);
-      alert("Forecast request successful!");
-      // Handle the response data as needed
-    } catch (error) {
-      console.error("Error sending forecast request:", error);
-      alert("Error getting forecast: " + error.message);
-    }
-  };
-
-  // Helper function to format date as YYYY-MM-DD
-  const formatDateForAPI = (date) => {
-    const year = date.getFullYear();
-    const month = String(date.getMonth() + 1).padStart(2, '0');
-    const day = String(date.getDate()).padStart(2, '0');
-    return `${year}-${month}-${day}`;
-  };
-</script>
-
-<div class="map-container">
-  <div id="map"></div>
-  <div class="coordinates-display">
-    Lat: {mouseLat}, Long: {mouseLng}
-  </div>
-  <div class="control-panel">
-    <div class="control-header">Launch Point</div>
-    
-    <div class="control-row">
-      <span>Start Point:</span>
-      <select bind:value={startPoint}>
-        <option>Custom</option>
-        <option>Preset 1</option>
-        <option>Preset 2</option>
-      </select>
-    </div>
-    
-    <div class="control-row">
-      <span>Latitude/Longitude:</span>
-      <div class="coordinate-inputs">
-        <input type="text" bind:value={inputLat} placeholder="Latitude">
-        <p>/</p>
-        <input type="text" bind:value={inputLng} placeholder="Longitude">
-        <button on:click={updateMapPosition} class="update-button">✓</button>
-      </div>
-    </div>
-
-    <div class="control-row">
-      <button class="map-button" on:click={() => {
-        inputLat = mouseLat;
-        inputLng = mouseLng;
-        updateMapPosition();
-      }}>Specify on map (click location)</button>
-    </div>
-    
-    <div class="control-row">
-      <span>Launch Height (m):</span>
-      <input type="number" bind:value={startHeight}>
-    </div>
-    
-    <div class="control-row">
-      <span>Launch Time (UTC):</span>
-      <input type="time" bind:value={startTime}>
-    </div>
-    
-    <div class="control-row">
-      <span>Launch Date:</span>
-      <input type="date" bind:value={startDate}>
-    </div>
-    
-    <div class="control-row">
-      <span>Ascent Rate (m/s):</span>
-      <input type="number" bind:value={ascentRate}>
-    </div>
-    
-    <div class="control-row">
-      <span>Burst/Drift Altitude (m):</span>
-      <input type="number" bind:value={burstAltitude}>
-    </div>
-    
-    <div class="control-row">
-      <span>Flight Profile:</span>
-      <select bind:value={flightProfile}>
-        <option>Normal</option>
-        <option>Drift</option>
-        <option>Reversible (on the rise)</option>
-        <option>Custom</option>
-      </select>
-    </div>
-    
-    <div class="control-row buttons">
-      <button on:click={toggleBurstCalculator}>Open Burst Calculator</button>
-      <button>Set Custom Flight Profile</button>
-      <button>Show Last Altitude Graph</button>
-    </div>
-    
-    <div class="control-row">
-      <span>Descent Rate (m/s):</span>
-      <input type="number" bind:value={descentRate}>
-    </div>
-    
-    <div class="control-row">
-      <span>Forecast Mode (help):</span>
-      <div class="radio-group">
-        <label>
-          <input type="radio" bind:group={forecastMode} value="Single"> Single
-        </label>
-        <label>
-          <input type="radio" bind:group={forecastMode} value="Multiple"> Multiple
-        </label>
-      </div>
-    </div>
-    
-    <div class="control-row">
-      <button class="primary-button" on:click={getForecast}>Get Forecast</button>
-      <button>Save Point</button>
-    </div>
-  </div>
-</div>
-
-<!-- Burst Calculator Modal -->
-{#if showBurstCalculator}
-<div class="modal-overlay" on:click|self={toggleBurstCalculator}>
-  <div class="modal-content">
-    <h2>Balloon Burst Calculation</h2>
-    
-    <div class="calculator-grid">
-      <div class="input-group">
-        <label>Payload Mass (g)</label>
-        <input type="number" bind:value={payloadMass}>
-      </div>
-      
-      <div class="input-group">
-        <label>Balloon Mass (g)</label>
-        <input type="number" bind:value={balloonMass}>
-      </div>
-      
-      <div class="input-group">
-        <label>Desired Burst Altitude (m)</label>
-        <input type="number" bind:value={desiredBurstAltitude}>
-      </div>
-      
-      <div class="input-group">
-        <label>Desired Ascent Rate (m/s)</label>
-        <input type="number" bind:value={desiredAscentRate} step="0.01">
-      </div>
-    </div>
-    
-    <div class="results-section">
-      <h3>Results</h3>
-      <div class="result-row">
-        <span>Burst Altitude:</span>
-        <span>{burstAltitudeResult} m</span>
-      </div>
-      <div class="result-row">
-        <span>Time to Burst:</span>
-        <span>{timeToBurst} min</span>
-      </div>
-      <div class="result-row">
-        <span>Initial Volume:</span>
-        <span>{initialVolume} m³</span>
-      </div>
-      <div class="result-row">
-        <span>Ascent Rate:</span>
-        <span>{ascentRateResult} m/s</span>
-      </div>
-      <div class="result-row">
-        <span>Lift Force at Launch:</span>
-        <span>{liftForce} g</span>
-      </div>
-      <div class="result-row">
-        <span>Volume:</span>
-        <span>{volumeLiters} L ({volumeCubicFeet} ft³)</span>
-      </div>
-    </div>
-    
-    <div class="modal-actions">
-      <button class="secondary-button">Additional Settings</button>
-      <button class="primary-button" on:click={calculateBurst}>Use Results</button>
-      <button on:click={toggleBurstCalculator}>Close</button>
-    </div>
-  </div>
-</div>
-{/if}
-
-<style>
-  .map-container {
-    position: relative;
-    width: 100%;
-    height: 100vh;
-  }
-
-  #map {
-    width: 100%;
-    height: 100%;
-    position: absolute;
-    top: 0;
-    left: 0;
-  }
-
-  .coordinates-display {
-    position: absolute;
-    top: 10px;
-    right: 10px;
-    background: rgba(255, 255, 255, 0.8);
-    padding: 5px 10px;
-    border-radius: 3px;
-    font-family: Arial, sans-serif;
-    font-size: 14px;
-    z-index: 1000; /* Ensure it's above the map */
-    box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
-  }
-  .control-panel {
-    position: absolute;
-    bottom: 20px;
-    right: 20px;
-    background: rgba(255, 255, 255, 0.9);
-    padding: 15px;
-    border-radius: 5px;
-    font-family: Arial, sans-serif;
-    font-size: 14px;
-    z-index: 1000;
-    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
-    width: 320px;
-    max-height: 80vh;
-    overflow-y: auto;
-  }
-
-  .control-header {
-    font-weight: bold;
-    margin-bottom: 10px;
-    font-size: 16px;
-    border-bottom: 1px solid #ddd;
-    padding-bottom: 5px;
-  }
-
-  .control-row {
-    margin-bottom: 8px;
-    display: flex;
-    align-items: center;
-  }
-
-  .control-row span {
-    width: 160px;
-    display: inline-block;
-  }
-
-  .control-row input[type="number"],
-  .control-row input[type="date"],
-  .control-row input[type="time"],
-  .control-row select {
-    width: 120px;
-    padding: 3px;
-  }
-
-  .coordinate-inputs {
-    display: flex;
-    align-items: center;
-    gap: 5px;
-  }
-
-  .coordinate-inputs input {
-    width: 70px !important;
-    padding: 3px;
-  }
-
-  .update-button {
-    padding: 3px 8px;
-    background: #4CAF50;
-    color: white;
-    border: none;
-    border-radius: 3px;
-    cursor: pointer;
-    margin-left: 5px;
-  }
-
-  .map-button {
-    width: 100%;
-    padding: 5px;
-    background: #f0f0f0;
-    border: 1px solid #ccc;
-    border-radius: 3px;
-    cursor: pointer;
-  }
-
-  .buttons {
-    flex-direction: column;
-    gap: 5px;
-    margin-top: 10px;
-  }
-
-  .buttons button {
-    width: 100%;
-    padding: 5px;
-    margin-bottom: 5px;
-    background: #f0f0f0;
-    border: 1px solid #ccc;
-    border-radius: 3px;
-    cursor: pointer;
-  }
-
-  .primary-button {
-    background: #4CAF50 !important;
-    color: white;
-    border: 1px solid #3e8e41 !important;
-  }
-
-  .radio-group {
-    display: flex;
-    gap: 10px;
-  }
-
-  .radio-group label {
-    display: flex;
-    align-items: center;
-    gap: 5px;
-  }
-
-  .modal-overlay {
-    position: fixed;
-    top: 0;
-    left: 0;
-    right: 0;
-    bottom: 0;
-    background-color: rgba(0, 0, 0, 0.5);
-    display: flex;
-    justify-content: center;
-    align-items: center;
-    z-index: 2000;
-  }
-
-  .modal-content {
-    background-color: white;
-    padding: 20px;
-    border-radius: 8px;
-    width: 500px;
-    max-width: 90%;
-    max-height: 90vh;
-    overflow-y: auto;
-    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
-  }
-
-  .calculator-grid {
-    display: grid;
-    grid-template-columns: 1fr 1fr;
-    gap: 15px;
-    margin: 20px 0;
-  }
-
-  .input-group {
-    display: flex;
-    flex-direction: column;
-  }
-
-  .input-group label {
-    margin-bottom: 5px;
-    font-weight: bold;
-    font-size: 0.9em;
-  }
-
-  .input-group input {
-    padding: 8px;
-    border: 1px solid #ddd;
-    border-radius: 4px;
-  }
-
-  .results-section {
-    background-color: #f5f5f5;
-    padding: 15px;
-    border-radius: 5px;
-    margin: 15px 0;
-  }
-
-  .results-section h3 {
-    margin-top: 0;
-    border-bottom: 1px solid #ddd;
-    padding-bottom: 5px;
-  }
-
-  .result-row {
-    display: flex;
-    justify-content: space-between;
-    margin: 8px 0;
-  }
-
-  .result-row span:first-child {
-    font-weight: bold;
-  }
-
-  .modal-actions {
-    display: flex;
-    justify-content: flex-end;
-    gap: 10px;
-    margin-top: 20px;
-  }
-
-  .secondary-button {
-    background: #f0f0f0;
-    border: 1px solid #ccc;
-  }
-
-</style>

src/routes/login/+page.svelte

@@ -0,0 +1,5 @@
+<script lang="ts">
+	import { LoginForm } from '$features/auth';
+</script>
+
+<LoginForm />

src/routes/predict/+page.svelte

@@ -0,0 +1,113 @@
+<script lang="ts">
+	import { onMount } from 'svelte';
+	import { Map as MapView } from '$map';
+	import type { IMap } from '$map';
+	import { startCoordinateSelection } from '$map';
+	import { Navbar } from '$features/auth';
+	import { PanelContainer, TabBar } from '$ui';
+	import { addToast, removeToast } from '$ui';
+	import { ControlPanel, ScenarioPanel } from '$features/prediction';
+	import {
+		WorkspacesPanel,
+		WorkspaceRenderer,
+		workspacesStore,
+	} from '$features/workspaces';
+	import { SettingsPanel } from '$features/settings';
+	import { TimeLine } from '$features/timeline';
+	import { t } from '$i18n';
+	import { requireAuthenticated } from '$auth';
+
+	type LeftTab = 'scenario' | 'conditions' | 'about';
+	type RightTab = 'results' | 'workspaces' | 'settings';
+
+	let mapComponent = $state<MapView | null>(null);
+	let controlPanelRef = $state<ControlPanel | null>(null);
+	let selectionToastId: string | null = null;
+	let selectionDispose: (() => void) | null = null;
+
+	let leftTab = $state<LeftTab>('scenario');
+	let rightTab = $state<RightTab>('workspaces');
+
+	onMount(async () => {
+		const ok = await requireAuthenticated('/login');
+		if (!ok) return;
+		if ($workspacesStore.items.length === 0) {
+			workspacesStore.add({ name: $t('workspaces.defaultName', { n: 1 }) });
+		}
+	});
+
+	function handleMapReady(_map: IMap) {
+		// Map is ready; consumers inside <MapView /> already have access via context.
+	}
+
+	function handleSelectOnMap() {
+		const map = mapComponent?.getInstance();
+		if (!map) return;
+
+		selectionDispose = startCoordinateSelection(map, ({ lat, lng }) => {
+			controlPanelRef?.updateLaunchPosition(lat, lng);
+			if (selectionToastId) {
+				removeToast(selectionToastId);
+				selectionToastId = null;
+			}
+			selectionDispose = null;
+		});
+
+		selectionToastId = addToast({
+			header: $t('selection.header'),
+			body: $t('selection.body'),
+			color: 'info',
+			persistent: true,
+			onRemove: () => {
+				selectionDispose?.();
+				selectionDispose = null;
+				selectionToastId = null;
+			},
+		});
+	}
+</script>
+
+<main>
+	<Navbar />
+	<div style="height: var(--navbar-height);"></div>
+	<MapView bind:this={mapComponent} onReady={handleMapReady}>
+		<WorkspaceRenderer />
+
+		<PanelContainer position="left">
+			<TabBar
+				tabs={[
+					{ id: 'scenario', icon: 'file-earmark-play', label: $t('panel.scenario') },
+					{ id: 'conditions', icon: 'sliders', label: $t('panel.conditions') },
+					{ id: 'about', icon: 'info-circle', label: $t('panel.about') },
+				]}
+				bind:active={leftTab} />
+			<div>
+				{#if leftTab === 'scenario'}
+					<ScenarioPanel />
+				{:else if leftTab === 'conditions'}
+					<ControlPanel bind:this={controlPanelRef} onSelectOnMapClick={handleSelectOnMap} />
+				{/if}
+			</div>
+		</PanelContainer>
+
+		<PanelContainer position="right">
+			<TabBar
+				justify="end"
+				tabs={[
+					{ id: 'workspaces', icon: 'layers', label: $t('panel.workspaces') },
+					{ id: 'results', icon: 'bar-chart-line', label: $t('panel.results') },
+					{ id: 'settings', icon: 'gear', label: $t('panel.settings') },
+				]}
+				bind:active={rightTab} />
+			<div>
+				{#if rightTab === 'workspaces'}
+					<WorkspacesPanel />
+				{:else if rightTab === 'settings'}
+					<SettingsPanel />
+				{/if}
+			</div>
+		</PanelContainer>
+
+		<TimeLine />
+	</MapView>
+</main>

src/routes/track/+page.svelte

@@ -0,0 +1,22 @@
+<script lang="ts">
+	import { onMount } from 'svelte';
+	import { Map as MapView } from '$map';
+	import { Navbar } from '$features/auth';
+	import { PanelContainer } from '$ui';
+	import { TelemetryPanel } from '$features/tracking';
+	import { requireAuthenticated } from '$auth';
+
+	onMount(() => {
+		requireAuthenticated('/login');
+	});
+</script>
+
+<main>
+	<Navbar />
+	<div style="height: var(--navbar-height);"></div>
+	<MapView>
+		<PanelContainer position="left">
+			<TelemetryPanel />
+		</PanelContainer>
+	</MapView>
+</main>

src/routes/user/account/+page.svelte

@@ -0,0 +1,84 @@
+<script lang="ts">
+	import { onMount } from 'svelte';
+	import {
+		Card,
+		CardHeader,
+		CardBody,
+		Button,
+		FormGroup,
+		Label,
+		Input,
+	} from '@sveltestrap/sveltestrap';
+	import { Navbar } from '$features/auth';
+	import { Footer } from '$features/footer';
+	import { ConfirmationPrompt } from '$ui';
+	import { authStore, requireAuthenticated } from '$auth';
+	import { goto } from '$app/navigation';
+	import { t } from '$i18n';
+
+	let showConfirm = $state(false);
+	let confirmTitle = $state('');
+	let confirmBody = $state('');
+	let confirmAction = $state<() => void>(() => {});
+
+	onMount(async () => {
+		if (!(await requireAuthenticated('/login'))) return;
+	});
+
+	function ask(title: string, body: string, action: () => void) {
+		confirmTitle = title;
+		confirmBody = body;
+		confirmAction = action;
+		showConfirm = true;
+	}
+
+	async function handleLogout() {
+		ask($t('nav.logout'), '', async () => {
+			await authStore.logout();
+			goto('/');
+		});
+	}
+</script>
+
+<main class="force-page-height">
+	<Navbar />
+	<div style="height: var(--navbar-height);"></div>
+	<div class="container my-4">
+		<div class="row">
+			<div class="col-md-3 col-lg-2 mb-4">
+				<nav class="nav nav-pills flex-column">
+					<a class="nav-link active" href="/user/account">{$t('nav.account')}</a>
+					<a class="nav-link" href="/user/templates">{$t('nav.scenarios')}</a>
+					<a class="nav-link" href="/user/predictions">{$t('nav.predictionHistory')}</a>
+					<a class="nav-link" href="/user/flights">{$t('nav.trackingHistory')}</a>
+				</nav>
+			</div>
+
+			<div class="col-md-9 col-lg-10">
+				<Card class="mb-4">
+					<CardHeader><h5 class="mb-0">{$t('nav.account')}</h5></CardHeader>
+					<CardBody>
+						<FormGroup>
+							<Label>{$t('login.username')}</Label>
+							<Input value={$authStore.username ?? ''} readonly disabled />
+						</FormGroup>
+						<div class="d-grid gap-2 d-md-flex">
+							<Button color="secondary" on:click={handleLogout}>{$t('nav.logout')}</Button>
+						</div>
+					</CardBody>
+				</Card>
+			</div>
+		</div>
+	</div>
+	<Footer />
+</main>
+
+<ConfirmationPrompt
+	bind:isOpen={showConfirm}
+	title={confirmTitle}
+	confirmText={$t('editor.save')}
+	cancelText={$t('editor.cancel')}
+	onconfirm={confirmAction}
+	oncancel={() => (showConfirm = false)}>
+	<p>{confirmBody}</p>
+</ConfirmationPrompt>

src/routes/user/flights/+page.svelte

@@ -0,0 +1,36 @@
+<script lang="ts">
+	import { onMount } from 'svelte';
+	import { Card, CardHeader, CardBody } from '@sveltestrap/sveltestrap';
+	import { Navbar } from '$features/auth';
+	import { Footer } from '$features/footer';
+	import { requireAuthenticated } from '$auth';
+	import { t } from '$i18n';
+
+	onMount(() => requireAuthenticated('/login'));
+</script>
+
+<main class="force-page-height">
+	<Navbar />
+	<div style="height: var(--navbar-height);"></div>
+	<div class="container my-4">
+		<div class="row">
+			<div class="col-md-3 col-lg-2 mb-4">
+				<nav class="nav nav-pills flex-column">
+					<a class="nav-link" href="/user/account">{$t('nav.account')}</a>
+					<a class="nav-link" href="/user/templates">{$t('nav.scenarios')}</a>
+					<a class="nav-link" href="/user/predictions">{$t('nav.predictionHistory')}</a>
+					<a class="nav-link active" href="/user/flights">{$t('nav.trackingHistory')}</a>
+				</nav>
+			</div>
+			<div class="col-md-9 col-lg-10">
+				<Card>
+					<CardHeader><h5 class="mb-0">{$t('nav.trackingHistory')}</h5></CardHeader>
+					<CardBody>
+						<p class="text-muted small mb-0">TODO: wire to tracking history endpoint.</p>
+					</CardBody>
+				</Card>
+			</div>
+		</div>
+	</div>
+	<Footer />
+</main>