debug: Add verification step for better-sqlite3

Dockerfile

@@ -47,6 +47,11 @@ RUN echo "=== Starting backend build ===" && \
     pnpm run build && \
     echo "=== Backend build completed ==="
 
+# 驗證 better-sqlite3 是否已安裝
+RUN echo "=== Checking better-sqlite3 ===" && \
+    pnpm list better-sqlite3 || echo "better-sqlite3 not found in workspace" && \
+    ls -la node_modules/.pnpm/ | grep better-sqlite3 || echo "better-sqlite3 not in .pnpm"
+
 # 建立資料和暫存目錄
 RUN mkdir -p /data /app/temp-storage && \
     chmod 777 /data /app/temp-storage