完善生图5.0的功能

.env.example

@@ -80,6 +80,10 @@ EVOLINK_IMAGE_QUALITY=medium
 # Volcengine Ark (shared by Seedance video and Seedream 5.0 Pro image generation)
 SEEDANCE_API_KEY=
 SEEDANCE_BASE_URL=https://ark.cn-beijing.volces.com/api/v3
+# Seedream 5.0 Pro is synchronous; interactive edits and layer decomposition
+# can take longer than the 30-second application default.
+ZHINIAN_PROVIDER_TIMEOUT_MS=180000
+ZHINIAN_PROVIDER_MAX_RESPONSE_BYTES=2097152
 # 默认模型；创作页仍可逐任务选择 Seedance 2.0 或 2.5。
 SEEDANCE_MODEL=doubao-seedance-2-0-260128
 SEEDANCE_RATIO=9:16
@@ -94,3 +98,4 @@ ALI_OSS_ACCESS_KEY_ID=
 ALI_OSS_ACCESS_KEY_SECRET=
 ALI_OSS_PREFIX=zhinian
 ALI_OSS_PUBLIC_BASE_URL=
+ZHINIAN_OSS_TIMEOUT_MS=120000