fix: 将编辑账单接口从 PATCH 改为 POST

- 修改后端路由：POST /api/bills/:id
- 修改前端 API 调用方法为 POST
- 移除临时添加的 CORS 中间件
- 解决生产环境 405 Method Not Allowed 问题

server/handler/update_bill.go

@@ -47,7 +47,7 @@ func parseBillTime(s string) (time.Time, error) {
 	return time.Time{}, fmt.Errorf("unsupported time format")
 }
 
-// UpdateBill PATCH /api/bills/:id 更新清洗后的账单记录
+// UpdateBill POST /api/bills/:id 更新清洗后的账单记录
 func UpdateBill(c *gin.Context) {
 	id := strings.TrimSpace(c.Param("id"))
 	if id == "" {

server/router/router.go

@@ -60,7 +60,7 @@ func setupAPIRoutes(r *gin.Engine) {
 			authed.GET("/bills", handler.ListBills)
 
 			// 编辑账单
-			authed.PATCH("/bills/:id", handler.UpdateBill)
+			authed.POST("/bills/:id", handler.UpdateBill)
 
 			// 手动创建账单
 			authed.POST("/bills/manual", handler.CreateManualBills)

web/src/lib/api.ts

@@ -258,7 +258,7 @@ export interface UpdateBillResponse {
 
 export async function updateBill(id: string, patch: UpdateBillRequest): Promise<UpdateBillResponse> {
   const response = await apiFetch(`${API_BASE}/api/bills/${encodeURIComponent(id)}`, {
-    method: 'PATCH',
+    method: 'POST',
     headers: {
       'Content-Type': 'application/json',
     },