feat: add comprehensive testing mechanism for dashboard features

- Add smoke test script for post-deployment verification
- Add health monitoring script with Telegram alerts
- Add backend integration tests for conversation tracker API
- Add frontend tests to verify correct API paths
- Update CI/CD workflows to enforce test failures and run smoke tests
- Add comprehensive testing documentation

This testing mechanism will catch issues like the double /api/ prefix bug
before they reach users.

dashboard/frontend/tests/integration/conversations.test.js

@@ -0,0 +1,130 @@
+import { describe, it, expect, beforeEach, vi } from 'vitest';
+import { get, post } from '../../src/lib/api.js';
+
+describe('Conversation Tracker API Paths', () => {
+  beforeEach(() => {
+    // Mock fetch globally
+    global.fetch = vi.fn();
+    // Mock localStorage
+    global.localStorage = {
+      getItem: vi.fn(() => 'mock-token'),
+      setItem: vi.fn(),
+      removeItem: vi.fn(),
+    };
+  });
+
+  it('should call /api/conversations/dates without double prefix', async () => {
+    global.fetch.mockResolvedValueOnce({
+      ok: true,
+      json: async () => ['2026-04-19'],
+      headers: new Headers(),
+    });
+
+    await get('/conversations/dates');
+
+    expect(global.fetch).toHaveBeenCalledWith(
+      expect.stringContaining('/api/conversations/dates'),
+      expect.any(Object)
+    );
+    expect(global.fetch).not.toHaveBeenCalledWith(
+      expect.stringContaining('/api/api/'),
+      expect.any(Object)
+    );
+  });
+
+  it('should call /api/conversations/summary/:date correctly', async () => {
+    global.fetch.mockResolvedValueOnce({
+      ok: true,
+      json: async () => ({ summary: 'test' }),
+      headers: new Headers(),
+    });
+
+    await get('/conversations/summary/2026-04-19');
+
+    expect(global.fetch).toHaveBeenCalledWith(
+      expect.stringContaining('/api/conversations/summary/2026-04-19'),
+      expect.any(Object)
+    );
+    expect(global.fetch).not.toHaveBeenCalledWith(
+      expect.stringContaining('/api/api/'),
+      expect.any(Object)
+    );
+  });
+
+  it('should call /api/conversations/list correctly', async () => {
+    global.fetch.mockResolvedValueOnce({
+      ok: true,
+      json: async () => [],
+      headers: new Headers(),
+    });
+
+    await get('/conversations/list?date=2026-04-19');
+
+    expect(global.fetch).toHaveBeenCalledWith(
+      expect.stringContaining('/api/conversations/list?date=2026-04-19'),
+      expect.any(Object)
+    );
+  });
+
+  it('should call search endpoint correctly', async () => {
+    global.fetch.mockResolvedValueOnce({
+      ok: true,
+      json: async () => [],
+      headers: new Headers(),
+    });
+
+    await get('/conversations/search?q=test');
+
+    expect(global.fetch).toHaveBeenCalledWith(
+      expect.stringContaining('/api/conversations/search?q=test'),
+      expect.any(Object)
+    );
+  });
+
+  it('should call stats endpoint correctly', async () => {
+    global.fetch.mockResolvedValueOnce({
+      ok: true,
+      json: async () => ({ top_projects: [], top_tools: [] }),
+      headers: new Headers(),
+    });
+
+    await get('/conversations/stats');
+
+    expect(global.fetch).toHaveBeenCalledWith(
+      expect.stringContaining('/api/conversations/stats'),
+      expect.any(Object)
+    );
+  });
+
+  it('should call conversation detail endpoint correctly', async () => {
+    global.fetch.mockResolvedValueOnce({
+      ok: true,
+      json: async () => ({ session_id: 'test' }),
+      headers: new Headers(),
+    });
+
+    await get('/conversations/test-session-id');
+
+    expect(global.fetch).toHaveBeenCalledWith(
+      expect.stringContaining('/api/conversations/test-session-id'),
+      expect.any(Object)
+    );
+  });
+
+  it('should call trigger endpoint correctly', async () => {
+    global.fetch.mockResolvedValueOnce({
+      ok: true,
+      json: async () => ({ status: 'ok' }),
+      headers: new Headers(),
+    });
+
+    await post('/conversations/trigger');
+
+    expect(global.fetch).toHaveBeenCalledWith(
+      expect.stringContaining('/api/conversations/trigger'),
+      expect.objectContaining({
+        method: 'POST',
+      })
+    );
+  });
+});