Restore Agent workspace and add platform pixel avatars

tests/unit/cloud-agent-avatar-routes.test.ts

@@ -0,0 +1,37 @@
+import type { IncomingMessage, ServerResponse } from 'node:http';
+import { Readable } from 'node:stream';
+import { beforeEach, expect, it, vi } from 'vitest';
+import { handleCloudAgentsRoutes } from '@electron/api/routes/cloud-agents';
+
+const service = vi.hoisted(() => ({ useAvatarPreset: vi.fn(), uploadAvatar: vi.fn() }));
+vi.mock('@electron/services/cloud-agents', () => ({
+  CloudAgentsModule: class { useAvatarPreset = service.useAvatarPreset; uploadAvatar = service.uploadAvatar; },
+  CloudAgentsError: class extends Error { constructor(readonly status: number, readonly code: string) { super(code); } },
+}));
+
+beforeEach(() => vi.resetAllMocks());
+
+async function call(path: string, body?: string, method = 'POST') {
+  const request = Object.assign(Readable.from(body ? [body] : []), { method, headers: {} }) as IncomingMessage;
+  let output = '';
+  const response = { setHeader: vi.fn(), statusCode: 0, end: (text: string) => { output = text; } } as unknown as ServerResponse;
+  const handled = await handleCloudAgentsRoutes(request, response, new URL(`http://localhost/api/cloud-agents${path}`));
+  return { handled, status: response.statusCode, body: JSON.parse(output) };
+}
+
+it('routes only the preset id to Main and returns the canonical icon projection', async () => {
+  const avatar = { icon: '/api/storage/public/images/account/avatar.png', icon_url: 'https://agents.test/api/storage/public/images/account/avatar.png' };
+  service.useAvatarPreset.mockResolvedValue(avatar);
+  expect(await call('/avatars/preset', JSON.stringify({ id: 'avatar-03' }))).toEqual({ handled: true, status: 200, body: avatar });
+  expect(service.useAvatarPreset).toHaveBeenCalledExactlyOnceWith({ id: 'avatar-03' });
+  expect(service.uploadAvatar).not.toHaveBeenCalled();
+});
+
+it('keeps the existing file picker route and rejects malformed preset JSON', async () => {
+  service.uploadAvatar.mockResolvedValue(null);
+  expect(await call('/avatars/pick')).toEqual({ handled: true, status: 200, body: null });
+  expect(service.uploadAvatar).toHaveBeenCalledOnce();
+  expect((await call('/avatars/preset', '{')).status).toBe(400);
+  expect(service.useAvatarPreset).not.toHaveBeenCalled();
+  expect((await call('/avatars/preset', undefined, 'GET')).status).toBe(404);
+});