修復版本發布功能中遺漏的 version_db 引用

修正 version_routes.py 中檔案上傳功能，
使用 supabase_clients 統一管理連接

app/api/version_routes.py

@@ -216,7 +216,20 @@ async def release_version(
             }
             content_type = content_types.get(file_extension, 'application/octet-stream')
 
-            final_download_url = await version_db.upload_file(file_path, file_content, content_type)
+            # 使用 Supabase Storage 上傳檔案
+            try:
+                client = supabase_clients.get_version_client()
+                storage_result = client.storage.from_('plugin-releases').upload(file_path, file_content, {
+                    'content-type': content_type,
+                    'x-upsert': 'true'
+                })
+
+                # 產生公開下載連結
+                final_download_url = client.storage.from_('plugin-releases').get_public_url(file_path)
+
+            except Exception as e:
+                logger.error(f"Storage upload error: {e}")
+                raise HTTPException(status_code=500, detail=f"檔案上傳失敗: {str(e)}")
         
         elif not download_url:
             raise HTTPException(status_code=400, detail="Must provide either file or download URL")

app/models/supabase_clients.py

@@ -67,22 +67,26 @@ class SupabaseClients:
     
     def get_license_client(self) -> Optional[Client]:
         """取得授權系統的 Supabase 客戶端"""
-        self._initialize_license_client()
+        if not self._license_initialized:
+            self._initialize_license_client()
         return self.license_client
 
     def get_version_client(self) -> Optional[Client]:
         """取得版本系統的 Supabase 客戶端"""
-        self._initialize_version_client()
+        if not self._version_initialized:
+            self._initialize_version_client()
         return self.version_client
     
     def is_license_connected(self) -> bool:
         """檢查授權系統是否連接成功"""
-        self._initialize_license_client()
+        if not self._license_initialized:
+            self._initialize_license_client()
         return self.license_client is not None
 
     def is_version_connected(self) -> bool:
         """檢查版本系統是否連接成功"""
-        self._initialize_version_client()
+        if not self._version_initialized:
+            self._initialize_version_client()
         return self.version_client is not None
     
     def verify_connections(self) -> dict: