Add side panels, task selection, graph animation, and project docs

- Foldable left panel (user profile) and right panel (task details)
- Clicking a task in the list or graph node selects it and shows details
- Both views (task list + graph) always mounted via absolute inset-0 for
  correct canvas dimensions; tabs toggle visibility with opacity
- Graph node selection animation: other nodes repel outward (charge -600),
  then selected node smoothly slides to center (500ms cubic ease-out),
  then charge restores to -120 and graph stabilizes
- Graph re-fits on tab switch and panel resize via ResizeObserver
- Fix UUID string IDs throughout (backend returns UUIDs, not integers)
- Add TaskDetailPanel, UserPanel components
- Add CLAUDE.md project documentation

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/node_modules/next/dist/build/webpack/loaders/next-app-loader.d.ts

@@ -0,0 +1,42 @@
+import type webpack from 'next/dist/compiled/webpack/webpack';
+import { type ValueOf } from '../../../shared/lib/constants';
+import type { ModuleReference, CollectedMetadata } from './metadata/types';
+import type { NextConfig } from '../../../server/config-shared';
+import type { PageExtensions } from '../../page-extensions-type';
+export type AppLoaderOptions = {
+    name: string;
+    page: string;
+    pagePath: string;
+    appDir: string;
+    appPaths: readonly string[] | null;
+    preferredRegion: string | string[] | undefined;
+    pageExtensions: PageExtensions;
+    assetPrefix: string;
+    rootDir?: string;
+    tsconfigPath?: string;
+    isDev?: boolean;
+    basePath: string;
+    nextConfigOutput?: NextConfig['output'];
+    nextConfigExperimentalUseEarlyImport?: boolean;
+    middlewareConfig: string;
+};
+type AppLoader = webpack.LoaderDefinitionFunction<AppLoaderOptions>;
+declare const FILE_TYPES: {
+    readonly layout: "layout";
+    readonly template: "template";
+    readonly error: "error";
+    readonly loading: "loading";
+    readonly 'not-found': "not-found";
+};
+export type MetadataResolver = (dir: string, filename: string, extensions: readonly string[]) => Promise<string | undefined>;
+export type ComponentsType = {
+    readonly [componentKey in ValueOf<typeof FILE_TYPES>]?: ModuleReference;
+} & {
+    readonly page?: ModuleReference;
+} & {
+    readonly metadata?: CollectedMetadata;
+} & {
+    readonly defaultPage?: ModuleReference;
+};
+declare const nextAppLoader: AppLoader;
+export default nextAppLoader;