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/server/lib/patch-fetch.d.ts

@@ -0,0 +1,11 @@
+import type { StaticGenerationAsyncStorage, StaticGenerationStore } from '../../client/components/static-generation-async-storage.external';
+import type * as ServerHooks from '../../client/components/hooks-server-context';
+export declare function validateRevalidate(revalidateVal: unknown, pathname: string): undefined | number | false;
+export declare function validateTags(tags: any[], description: string): string[];
+export declare function addImplicitTags(staticGenerationStore: StaticGenerationStore): string[];
+interface PatchableModule {
+    serverHooks: typeof ServerHooks;
+    staticGenerationAsyncStorage: StaticGenerationAsyncStorage;
+}
+export declare function patchFetch(options: PatchableModule): void;
+export {};