feat: add config profiles

- Add ConfigProfile and ConfigProfileInclude data models with migrations
- Implement profile resolver service with ordered includes and merge rules
- Add profile CRUD API with validation, compatibility, and cycle detection
- Add instance API plumbing for profile selection on create/start/restart
- Add resolved profile preview and default resolution APIs
- Add frontend config profile API client and management UI
- Add launch/restart profile selection UI
- Add backend integration and unit tests (31 passing)

OpenSpec: add-config-profiles
Quality gates: ruff, TypeScript compile, 31 tests passing

apps/web/src/api/sessions.ts

@@ -10,6 +10,7 @@ export interface ToolInstance {
   status: string;
   url: string | null;
   port: number | null;
+  selected_config_profile_id: string | null;
   created_at: string;
 }
 
@@ -49,7 +50,8 @@ export async function createInstance(
   displayName?: string,
   cloneMode?: string,
   branch?: string,
-  newBranch?: string
+  newBranch?: string,
+  configProfileId?: string
 ): Promise<ToolInstance> {
   const response = await apiClient.post(
     `/projects/${projectId}/repositories/${repoId}/instances`,
@@ -59,6 +61,7 @@ export async function createInstance(
       clone_mode: cloneMode || "mount",
       branch: branch || undefined,
       new_branch: newBranch || undefined,
+      config_profile_id: configProfileId,
     }
   );
   return response.data;
@@ -67,10 +70,12 @@ export async function createInstance(
 export async function startInstance(
   projectId: string,
   repoId: string,
-  instanceId: string
+  instanceId: string,
+  configProfileId?: string
 ): Promise<{ status: string; url?: string }> {
   const response = await apiClient.post(
-    `/projects/${projectId}/repositories/${repoId}/instances/${instanceId}/start`
+    `/projects/${projectId}/repositories/${repoId}/instances/${instanceId}/start`,
+    { config_profile_id: configProfileId }
   );
   return response.data;
 }
@@ -89,10 +94,12 @@ export async function stopInstance(
 export async function restartInstance(
   projectId: string,
   repoId: string,
-  instanceId: string
+  instanceId: string,
+  configProfileId?: string
 ): Promise<{ status: string; url?: string }> {
   const response = await apiClient.post(
-    `/projects/${projectId}/repositories/${repoId}/instances/${instanceId}/restart`
+    `/projects/${projectId}/repositories/${repoId}/instances/${instanceId}/restart`,
+    { config_profile_id: configProfileId }
   );
   return response.data;
 }