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/pointer/keyMap.js

@@ -0,0 +1,31 @@
+const defaultKeyMap = [
+    {
+        name: 'MouseLeft',
+        pointerType: 'mouse',
+        button: 'primary'
+    },
+    {
+        name: 'MouseRight',
+        pointerType: 'mouse',
+        button: 'secondary'
+    },
+    {
+        name: 'MouseMiddle',
+        pointerType: 'mouse',
+        button: 'auxiliary'
+    },
+    {
+        name: 'TouchA',
+        pointerType: 'touch'
+    },
+    {
+        name: 'TouchB',
+        pointerType: 'touch'
+    },
+    {
+        name: 'TouchC',
+        pointerType: 'touch'
+    }
+];
+
+export { defaultKeyMap };