fix: copy scripts/ before npm ci to satisfy postinstall hook

Dockerfile

@@ -11,8 +11,9 @@ RUN npm install -g @anthropic-ai/claude-code task-master-ai
 
 WORKDIR /app
 
-# Install dependencies (separate layer for cache efficiency)
+# Copy package files and scripts needed for postinstall hooks
 COPY package*.json ./
+COPY scripts/ ./scripts/
 RUN npm ci
 
 # VITE_ vars must be present at build time (baked into frontend bundle)