feat(settings): codeman doctor in Settings -> System -> Diagnostics

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/web/server.ts

@@ -202,6 +202,7 @@ import {
   registerTabLayoutRoutes,
   registerMcpSyncRoutes,
   registerWebhookRoutes,
+  registerDoctorRoutes,
   registerCustomModelRoutes,
   refreshAllCustomModelHosts,
   readCustomModelEndpointsEnabled,
@@ -1143,6 +1144,7 @@ export class WebServer extends EventEmitter {
       configDir: getDataDir(),
       hostTitle: () => this.windowTitle,
     });
+    registerDoctorRoutes(this.app);
     registerCustomModelRoutes(this.app);
     registerCliRegistryRoutes(this.app);