Fresh clone on every automated task, generic repo setup

Always rm -rf ~/project before cloning to avoid stale state from
previous workspace runs on the same PVC. Made setup steps generic
(detect frontend, playwright, migrations) instead of babble-specific.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

coder/cloudflare-worker/main.tf

@@ -490,27 +490,35 @@ resource "coder_agent" "main" {
     fi
 
     # --- Clone repository ---
-    if [ -n "$REPO_CLONE_URL" ] && [ ! -d ~/project ]; then
+    if [ -n "$REPO_CLONE_URL" ]; then
+      # Always start fresh for automated tasks to avoid stale state
+      rm -rf ~/project
       git clone "$REPO_CLONE_URL" ~/project
       cd ~/project
 
       # Switch to develop branch if it exists
       git fetch origin develop 2>/dev/null && git checkout develop 2>/dev/null || true
 
-      # Install backend deps
-      npm ci --legacy-peer-deps
+      # Install deps if package.json exists
+      if [ -f package.json ]; then
+        npm ci --legacy-peer-deps || npm ci
+      fi
 
-      # Install frontend deps
+      # Install frontend deps if present
+      if [ -f frontend/package.json ]; then
         cd frontend && npm ci && cd ..
+        npm run build:frontend 2>/dev/null || true
+      fi
 
-      # Build frontend (required — vitest fails without frontend/dist)
-      npm run build:frontend
-
-      # Install Playwright Chromium
+      # Install Playwright if needed
+      if grep -q "playwright" package.json 2>/dev/null; then
         npx playwright install chromium
+      fi
 
-      # Apply local migrations
-      npm run db:migrate:local
+      # Apply local migrations if script exists
+      if npm run --silent db:migrate:local 2>/dev/null; then
+        echo "Local migrations applied"
+      fi
     fi
 
     # --- Automated task execution ---