feat(api): 统一公开接口为 /api/v1 前缀

将通用生成、Gemini、可灵、火山、健康检查与 OpenAPI 的推荐入口统一到 /api/v1，并保留历史路径作为兼容别名。同步更新代理配置、接入文档、接口清单和前缀回归测试。\n\n验证：go vet ./...；go test ./...；pnpm openapi；pnpm lint；pnpm test；pnpm build；公开 OpenAPI 71 个方法与接口清单机器比对一致。

apps/api/internal/httpapi/gemini_compat.go

@@ -75,6 +75,21 @@ func geminiGenerateContentModelFromPath(prefix string, requestPath string) (stri
 	return model, true
 }
 
+// geminiGenerateContent godoc
+// @Summary Gemini generateContent 兼容接口
+// @Description 使用统一 /api/v1 前缀接收 Gemini generateContent 请求；旧 /v1 和 /v1beta 路径保留兼容。
+// @Tags gemini-compatible
+// @Accept json
+// @Produce json
+// @Security BearerAuth
+// @Param model path string true "模型名称"
+// @Param input body map[string]interface{} true "Gemini generateContent 请求"
+// @Success 200 {object} map[string]interface{}
+// @Failure 400 {object} ErrorEnvelope
+// @Failure 401 {object} ErrorEnvelope
+// @Failure 403 {object} ErrorEnvelope
+// @Failure 502 {object} ErrorEnvelope
+// @Router /api/v1/models/{model}:generateContent [post]
 func (s *Server) geminiGenerateContent(w http.ResponseWriter, r *http.Request) {
 	user, ok := auth.UserFromContext(r.Context())
 	if !ok {
@@ -395,6 +410,18 @@ func geminiUsageMetadataFromOutput(output map[string]any) map[string]any {
 	return meta
 }
 
+// geminiFilesUpload godoc
+// @Summary Gemini Files 上传接口
+// @Description 使用统一 /api/v1 前缀启动或直接完成 Gemini Files 上传。
+// @Tags gemini-compatible
+// @Accept octet-stream
+// @Produce json
+// @Security BearerAuth
+// @Param version path string true "Gemini 版本（v1 或 v1beta）"
+// @Success 200 {object} map[string]interface{}
+// @Failure 400 {object} ErrorEnvelope
+// @Failure 401 {object} ErrorEnvelope
+// @Router /api/v1/gemini/upload/{version}/files [post]
 func (s *Server) geminiFilesUpload(w http.ResponseWriter, r *http.Request) {
 	if err := validateGeminiFilesVersion(r.PathValue("version")); err != nil {
 		writeError(w, http.StatusBadRequest, err.Error(), clients.ErrorCode(err))
@@ -412,6 +439,18 @@ func (s *Server) geminiFilesUpload(w http.ResponseWriter, r *http.Request) {
 	})
 }
 
+// geminiFilesUploadFinalize godoc
+// @Summary 完成 Gemini Files 分段上传
+// @Tags gemini-compatible
+// @Accept octet-stream
+// @Produce json
+// @Security BearerAuth
+// @Param version path string true "Gemini 版本（v1 或 v1beta）"
+// @Param uploadID path string true "上传会话 ID"
+// @Success 200 {object} map[string]interface{}
+// @Failure 400 {object} ErrorEnvelope
+// @Failure 401 {object} ErrorEnvelope
+// @Router /api/v1/gemini/upload/{version}/files/{uploadID} [post]
 func (s *Server) geminiFilesUploadFinalize(w http.ResponseWriter, r *http.Request) {
 	if err := validateGeminiFilesVersion(r.PathValue("version")); err != nil {
 		writeError(w, http.StatusBadRequest, err.Error(), clients.ErrorCode(err))
@@ -440,11 +479,18 @@ func (s *Server) startGeminiFilesUpload(w http.ResponseWriter, r *http.Request)
 		CreatedAt:   time.Now(),
 	}
 	s.geminiUploadSessions.Store(uploadID, session)
-	w.Header().Set("X-Goog-Upload-URL", absoluteRequestURL(r, "/upload/"+session.Version+"/files/"+uploadID))
+	w.Header().Set("X-Goog-Upload-URL", absoluteRequestURL(r, geminiUploadPath(r, session.Version, uploadID)))
 	w.Header().Set("X-Goog-Upload-Status", "active")
 	writeJSON(w, http.StatusOK, map[string]any{})
 }
 
+func geminiUploadPath(r *http.Request, version string, uploadID string) string {
+	if strings.HasPrefix(r.URL.Path, "/api/v1/gemini/upload/") {
+		return "/api/v1/gemini/upload/" + version + "/files/" + uploadID
+	}
+	return "/upload/" + version + "/files/" + uploadID
+}
+
 func (s *Server) finalizeGeminiFilesUpload(w http.ResponseWriter, r *http.Request, uploadID string, session geminiUploadSession) {
 	if uploadID == "" {
 		uploadID = newGeminiUploadID()