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-build/index.d.ts

@@ -0,0 +1,8 @@
+import type { BuildTraceContext } from '../webpack/plugins/next-trace-entrypoints-plugin';
+declare const ORDERED_COMPILER_NAMES: import("../../shared/lib/constants").CompilerNameValues[];
+declare function webpackBuildWithWorker(compilerNamesArg: typeof ORDERED_COMPILER_NAMES | null): Promise<{
+    duration: number;
+    buildTraceContext: BuildTraceContext;
+}>;
+export declare function webpackBuild(withWorker: boolean, compilerNames: typeof ORDERED_COMPILER_NAMES | null): ReturnType<typeof webpackBuildWithWorker>;
+export {};