feat: add MCP server testing and tool listing functionality

- Add MCPTestService for testing MCP server connections
- Support stdio, SSE, and HTTP transport types
- Implement workaround for SSE headers bug (SDK Issue #436)
- Create API routes for /api/mcp/test and /api/mcp/tools
- Add API client methods for MCP operations
- Create MCPToolsList component with collapsible schema display
- Add Test button to MCP servers section with status indicators
- Add Headers field for HTTP/SSE servers
- Add Environment Variables field for stdio servers
- Fix text overflow in tools list display

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/server/src/routes/mcp/index.ts

@@ -0,0 +1,36 @@
+/**
+ * MCP routes - HTTP API for testing MCP servers
+ *
+ * Provides endpoints for:
+ * - Testing MCP server connections
+ * - Listing available tools from MCP servers
+ *
+ * Mounted at /api/mcp in the main server.
+ */
+
+import { Router } from 'express';
+import type { MCPTestService } from '../../services/mcp-test-service.js';
+import { createTestServerHandler } from './routes/test-server.js';
+import { createListToolsHandler } from './routes/list-tools.js';
+
+/**
+ * Create MCP router with all endpoints
+ *
+ * Endpoints:
+ * - POST /test - Test MCP server connection
+ * - POST /tools - List tools from MCP server
+ *
+ * @param mcpTestService - Instance of MCPTestService for testing connections
+ * @returns Express Router configured with all MCP endpoints
+ */
+export function createMCPRoutes(mcpTestService: MCPTestService): Router {
+  const router = Router();
+
+  // Test MCP server connection
+  router.post('/test', createTestServerHandler(mcpTestService));
+
+  // List tools from MCP server
+  router.post('/tools', createListToolsHandler(mcpTestService));
+
+  return router;
+}