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/aria-query/lib/etc/roles/ariaGraphicsRoles.js

@@ -0,0 +1,14 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _graphicsDocumentRole = _interopRequireDefault(require("./graphics/graphicsDocumentRole"));
+var _graphicsObjectRole = _interopRequireDefault(require("./graphics/graphicsObjectRole"));
+var _graphicsSymbolRole = _interopRequireDefault(require("./graphics/graphicsSymbolRole"));
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+var ariaGraphicsRoles = [['graphics-document', _graphicsDocumentRole.default], ['graphics-object', _graphicsObjectRole.default], ['graphics-symbol', _graphicsSymbolRole.default]];
+var _default = ariaGraphicsRoles;
+exports.default = _default;