Fix: Use npm install instead of npm ci

.gitea/workflows/deploy.yml

@@ -21,12 +21,12 @@ jobs:
           node-version: "24"
 
       - name: Install Backend Dependencies
-        run: npm ci --production
+        run: npm install --production
 
       - name: Install Frontend Dependencies
         run: |
           cd frontend
-          npm ci
+          npm install
 
       - name: Build Frontend
         run: |
@@ -84,12 +84,12 @@ jobs:
 
             # Install backend dependencies
             echo "📦 Installing backend dependencies..."
-            npm ci --production
+            npm install --production
 
             # Build frontend
             echo "🎨 Building frontend..."
             cd frontend
-            npm ci
+            npm install
             npm run build
 
             # Deploy frontend to nginx directory