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/next/dist/esm/client/setup-hydration-warning.js

@@ -0,0 +1,20 @@
+if (!window._nextSetupHydrationWarning) {
+    const origConsoleError = window.console.error;
+    window.console.error = function() {
+        for(var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++){
+            args[_key] = arguments[_key];
+        }
+        const isHydrateError = args.some((arg)=>typeof arg === "string" && arg.match(/(hydration|content does not match|did not match)/i));
+        if (isHydrateError) {
+            args = [
+                ...args,
+                "\nSee more info here: https://nextjs.org/docs/messages/react-hydration-error"
+            ];
+        }
+        origConsoleError.apply(window.console, args);
+    };
+    window._nextSetupHydrationWarning = true;
+}
+export { };
+
+//# sourceMappingURL=setup-hydration-warning.js.map