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/http-proxy-agent/dist/index.d.ts

@@ -0,0 +1,21 @@
+/// <reference types="node" />
+import net from 'net';
+import tls from 'tls';
+import { Url } from 'url';
+import { AgentOptions } from 'agent-base';
+import _HttpProxyAgent from './agent';
+declare function createHttpProxyAgent(opts: string | createHttpProxyAgent.HttpProxyAgentOptions): _HttpProxyAgent;
+declare namespace createHttpProxyAgent {
+    interface BaseHttpProxyAgentOptions {
+        secureProxy?: boolean;
+        host?: string | null;
+        path?: string | null;
+        port?: string | number | null;
+    }
+    export interface HttpProxyAgentOptions extends AgentOptions, BaseHttpProxyAgentOptions, Partial<Omit<Url & net.NetConnectOpts & tls.ConnectionOptions, keyof BaseHttpProxyAgentOptions>> {
+    }
+    export type HttpProxyAgent = _HttpProxyAgent;
+    export const HttpProxyAgent: typeof _HttpProxyAgent;
+    export {};
+}
+export = createHttpProxyAgent;