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/react/dist/config.js

@@ -0,0 +1,33 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.configure = configure;
+exports.getConfig = getConfig;
+var _dom = require("@testing-library/dom");
+let configForRTL = {
+  reactStrictMode: false
+};
+function getConfig() {
+  return {
+    ...(0, _dom.getConfig)(),
+    ...configForRTL
+  };
+}
+function configure(newConfig) {
+  if (typeof newConfig === 'function') {
+    // Pass the existing config out to the provided function
+    // and accept a delta in return
+    newConfig = newConfig(getConfig());
+  }
+  const {
+    reactStrictMode,
+    ...configForDTL
+  } = newConfig;
+  (0, _dom.configure)(configForDTL);
+  configForRTL = {
+    ...configForRTL,
+    reactStrictMode
+  };
+}