feat: add download toast, e2e permission tests, and update favicons

- Add download toast component with progress indicator and auto-dismiss
- Add download store for managing file download state
- Add e2e tests for permission prompts (allow/deny flows)
- Add global setup for e2e tests with isolated daemon instance
- Update favicon assets with new design
- Refactor agent-stream-view to use shared tool-call-details component
- Simplify file-explorer-pane component
- Clean up unused screenshots and PRODUCTION.md

🤖 Generated with [Claude Code](https://claude.com/claude-code)

packages/app/e2e/global-setup.ts

@@ -0,0 +1,88 @@
+import { spawn, type ChildProcess, execSync } from 'node:child_process';
+import { mkdtemp, rm } from 'node:fs/promises';
+import { tmpdir } from 'node:os';
+import path from 'node:path';
+import net from 'node:net';
+
+async function getAvailablePort(): Promise<number> {
+  return new Promise((resolve, reject) => {
+    const server = net.createServer();
+    server.once('error', reject);
+    server.listen(0, () => {
+      const address = server.address();
+      if (!address || typeof address === 'string') {
+        server.close(() => reject(new Error('Failed to acquire port')));
+        return;
+      }
+      server.close(() => resolve(address.port));
+    });
+  });
+}
+
+async function waitForServer(port: number, timeout = 15000): Promise<void> {
+  const start = Date.now();
+  while (Date.now() - start < timeout) {
+    try {
+      await new Promise<void>((resolve, reject) => {
+        const socket = net.connect(port, 'localhost', () => {
+          socket.end();
+          resolve();
+        });
+        socket.on('error', reject);
+      });
+      return;
+    } catch {
+      await new Promise((r) => setTimeout(r, 100));
+    }
+  }
+  throw new Error(`Server did not start on port ${port} within ${timeout}ms`);
+}
+
+let daemonProcess: ChildProcess | null = null;
+let paseoHome: string | null = null;
+
+export default async function globalSetup() {
+  const port = await getAvailablePort();
+  paseoHome = await mkdtemp(path.join(tmpdir(), 'paseo-e2e-home-'));
+
+  const serverDir = path.resolve(__dirname, '../../..', 'packages/server');
+  const tsxBin = execSync('which tsx').toString().trim();
+
+  daemonProcess = spawn(tsxBin, ['src/server/index.ts'], {
+    cwd: serverDir,
+    env: {
+      ...process.env,
+      PASEO_HOME: paseoHome,
+      PASEO_LISTEN: `0.0.0.0:${port}`,
+      PASEO_CORS_ORIGINS: 'http://localhost:8081',
+      NODE_ENV: 'development',
+    },
+    stdio: ['ignore', 'pipe', 'pipe'],
+    detached: false,
+  });
+
+  daemonProcess.stdout?.on('data', (data: Buffer) => {
+    console.log(`[daemon] ${data.toString().trim()}`);
+  });
+
+  daemonProcess.stderr?.on('data', (data: Buffer) => {
+    console.error(`[daemon] ${data.toString().trim()}`);
+  });
+
+  await waitForServer(port);
+
+  process.env.E2E_DAEMON_PORT = String(port);
+  console.log(`[e2e] Test daemon started on port ${port}, home: ${paseoHome}`);
+
+  return async () => {
+    if (daemonProcess) {
+      daemonProcess.kill('SIGTERM');
+      daemonProcess = null;
+    }
+    if (paseoHome) {
+      await rm(paseoHome, { recursive: true, force: true });
+      paseoHome = null;
+    }
+    console.log('[e2e] Test daemon stopped');
+  };
+}