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/cjs/options.js

@@ -0,0 +1,14 @@
+'use strict';
+
+var PointerEventsCheckLevel = /*#__PURE__*/ function(PointerEventsCheckLevel) {
+    /**
+   * Check pointer events on every user interaction that triggers a bunch of events.
+   * E.g. once for releasing a mouse button even though this triggers `pointerup`, `mouseup`, `click`, etc...
+   */ PointerEventsCheckLevel[PointerEventsCheckLevel["EachTrigger"] = 4] = "EachTrigger";
+    /** Check each target once per call to pointer (related) API */ PointerEventsCheckLevel[PointerEventsCheckLevel["EachApiCall"] = 2] = "EachApiCall";
+    /** Check each event target once */ PointerEventsCheckLevel[PointerEventsCheckLevel["EachTarget"] = 1] = "EachTarget";
+    /** No pointer events check */ PointerEventsCheckLevel[PointerEventsCheckLevel["Never"] = 0] = "Never";
+    return PointerEventsCheckLevel;
+}({});
+
+exports.PointerEventsCheckLevel = PointerEventsCheckLevel;