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/@testing-library/user-event/dist/esm/setup/api.js

@@ -0,0 +1,33 @@
+import { click, dblClick, tripleClick } from '../convenience/click.js';
+import { hover, unhover } from '../convenience/hover.js';
+import { tab } from '../convenience/tab.js';
+import { keyboard } from '../keyboard/index.js';
+import { copy } from '../clipboard/copy.js';
+import { cut } from '../clipboard/cut.js';
+import { paste } from '../clipboard/paste.js';
+import { pointer } from '../pointer/index.js';
+import { clear } from '../utility/clear.js';
+import { deselectOptions, selectOptions } from '../utility/selectOptions.js';
+import { type } from '../utility/type.js';
+import { upload } from '../utility/upload.js';
+
+const userEventApi = {
+    click,
+    dblClick,
+    tripleClick,
+    hover,
+    unhover,
+    tab,
+    keyboard,
+    copy,
+    cut,
+    paste,
+    pointer,
+    clear,
+    deselectOptions,
+    selectOptions,
+    type,
+    upload
+};
+
+export { userEventApi };