ci: resolve merge conflicts and enforce manual trigger policy across all workflows

.github/workflows/backend-foundation.yml

@@ -1,14 +1,7 @@
 name: Backend Foundation
 
 on:
-  pull_request:
-    branches:
-      - dev
-      - main
-  push:
-    branches:
-      - dev
-      - main
+  workflow_dispatch: # Manual trigger only — auto-triggers disabled (free plan)
 
 jobs:
   backend-foundation-makefile:

.github/workflows/mobile-ci.yml

@@ -236,4 +236,3 @@ jobs:
           else
             echo "✅ Pipeline PASSED"
           fi
-

.github/workflows/web-quality.yml

@@ -1,14 +1,7 @@
 name: Web Quality
 
 on:
-  pull_request:
-    branches:
-      - dev
-      - main
-  push:
-    branches:
-      - dev
-      - main
+  workflow_dispatch: # Manual trigger only — auto-triggers disabled (free plan)
 
 jobs:
   web-quality: