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/clipboard/cut.js

@@ -0,0 +1,22 @@
+'use strict';
+
+var Clipboard = require('../utils/dataTransfer/Clipboard.js');
+var copySelection = require('../document/copySelection.js');
+
+async function cut() {
+    const doc = this.config.document;
+    var _doc_activeElement;
+    const target = (_doc_activeElement = doc.activeElement) !== null && _doc_activeElement !== undefined ? _doc_activeElement : /* istanbul ignore next */ doc.body;
+    const clipboardData = copySelection.copySelection(target);
+    if (clipboardData.items.length === 0) {
+        return;
+    }
+    if (this.dispatchUIEvent(target, 'cut', {
+        clipboardData
+    }) && this.config.writeToClipboard) {
+        await Clipboard.writeDataTransferToClipboard(target.ownerDocument, clipboardData);
+    }
+    return clipboardData;
+}
+
+exports.cut = cut;