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/experimental/testmode/playwright/msw.d.ts

@@ -0,0 +1,20 @@
+import { defineConfig } from './index';
+import type { NextFixture } from './next-fixture';
+import { type RequestHandler } from 'msw';
+export * from 'msw';
+export * from '@playwright/test';
+export type { NextFixture };
+export { defineConfig };
+export interface MswFixture {
+    use: (...handlers: RequestHandler[]) => void;
+}
+export declare const test: import("@playwright/test").TestType<import("@playwright/test").PlaywrightTestArgs & import("@playwright/test").PlaywrightTestOptions & {
+    next: NextFixture;
+    nextOptions: import("./next-options").NextOptions;
+} & {
+    msw: MswFixture;
+    mswHandlers: RequestHandler[];
+}, import("@playwright/test").PlaywrightWorkerArgs & import("@playwright/test").PlaywrightWorkerOptions & {
+    _nextWorker: import("./next-worker-fixture").NextWorkerFixture;
+}>;
+export default test;