Implement unified story generation flow

backend/app/core/config.py

@@ -1,15 +1,20 @@
-from pydantic import Field, model_validator
-from pydantic_settings import BaseSettings, SettingsConfigDict
-
-
-class Settings(BaseSettings):
-    """应用全局配置"""
-
-    model_config = SettingsConfigDict(
-        env_file=".env",
-        env_file_encoding="utf-8",
-        extra="ignore",
-    )
+from pathlib import Path
+
+from pydantic import Field, model_validator
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+BACKEND_DIR = Path(__file__).resolve().parents[2]
+BACKEND_ENV_FILE = BACKEND_DIR / ".env"
+
+
+class Settings(BaseSettings):
+    """应用全局配置"""
+
+    model_config = SettingsConfigDict(
+        env_file=BACKEND_ENV_FILE,
+        env_file_encoding="utf-8",
+        extra="ignore",
+    )
 
     # 应用基础配置
     app_name: str = "DreamWeaver"
@@ -34,9 +39,10 @@ class Settings(BaseSettings):
     tts_api_key: str = ""
     image_api_key: str = ""
 
-    # Additional Provider API Keys
-    openai_api_key: str = ""
-    elevenlabs_api_key: str = ""
+    # Additional Provider API Keys
+    openai_api_key: str = ""
+    openai_api_base: str = ""
+    elevenlabs_api_key: str = ""
     cqtai_api_key: str = ""
     minimax_api_key: str = ""
     minimax_group_id: str = ""