feat(domain): integrate coasts dev server with feature flag and coastfile auto-generation

.storybook/mocks/app/actions/check-coastfile.ts

@@ -0,0 +1,3 @@
+export async function checkCoastfileAction(_repositoryPath: string): Promise<{ exists: boolean }> {
+  return { exists: false };
+}

.storybook/mocks/app/actions/generate-coastfile.ts

@@ -0,0 +1,5 @@
+export async function generateCoastfileAction(
+  _repositoryPath: string
+): Promise<{ success: boolean; coastfilePath?: string; error?: string }> {
+  return { success: false, error: 'Not available in Storybook' };
+}

apis/json-schema/FeatureFlags.yaml

@@ -30,6 +30,10 @@ properties:
     type: boolean
     default: false
     description: Use the built-in React file manager instead of the native OS folder picker
+  coastsDevServer:
+    type: boolean
+    default: false
+    description: Enable Coasts containerized runtime isolation for the dev server
 required:
   - skills
   - envDeploy
@@ -38,4 +42,5 @@ required:
   - adoptBranch
   - gitRebaseSync
   - reactFileManager
+  - coastsDevServer
 description: Feature flag toggles for runtime feature control