fix: 文件上传覆盖运行中的二进制文件时 ETXTBSY 错误 (#1488)

* Initial plan

* fix: 强制覆盖文件时先删除再创建，避免覆盖运行中的二进制文件报 ETXTBSY 错误

Co-authored-by: devhaozi <115467771+devhaozi@users.noreply.github.com>

* fix: 处理 Remove() 错误，删除失败时提前返回明确错误信息

Co-authored-by: devhaozi <115467771+devhaozi@users.noreply.github.com>

* fix: lint

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: devhaozi <115467771+devhaozi@users.noreply.github.com>
Co-authored-by: 耗子 <haozi@loli.email>

internal/service/file.go

@@ -166,6 +166,11 @@ func (s *FileService) Upload(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	// 强制覆盖时先删除已有文件，避免覆盖正在运行的二进制文件时出现 ETXTBSY 错误
+	if force && io.Exists(path) {
+		_ = stdos.Remove(path)
+	}
+
 	if !io.Exists(filepath.Dir(path)) {
 		if err = stdos.MkdirAll(filepath.Dir(path), 0755); err != nil {
 			Error(w, http.StatusInternalServerError, s.t.Get("create directory error: %v", err))
@@ -694,6 +699,11 @@ func (s *FileService) ChunkUploadFinish(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
+	// 强制覆盖时先删除已有文件，避免覆盖正在运行的二进制文件时出现 ETXTBSY 错误
+	if req.Force && io.Exists(targetPath) {
+		_ = stdos.Remove(targetPath)
+	}
+
 	// 创建目标文件
 	outFile, err := stdos.OpenFile(targetPath, stdos.O_CREATE|stdos.O_WRONLY|stdos.O_TRUNC, 0644)
 	if err != nil {