大改，未验证

src/config/unified_config.py

@@ -71,6 +71,19 @@ class AIAccuracyConfig:
     human_resolution_confidence: float = 0.90
 
 
+@dataclass
+class EmbeddingConfig:
+    """Embedding 向量配置"""
+    enabled: bool = True
+    api_key: Optional[str] = None  # 本地模式不需要
+    base_url: Optional[str] = None  # 本地模式不需要
+    model: str = "BAAI/bge-small-zh-v1.5"  # 本地轻量中文模型
+    dimension: int = 512  # bge-small-zh 输出维度
+    batch_size: int = 32
+    similarity_threshold: float = 0.5  # 语义搜索相似度阈值
+    cache_ttl: int = 86400  # embedding 缓存过期时间（秒），默认 1 天
+
+
 @dataclass
 class RedisConfig:
     """Redis缓存配置"""
@@ -99,6 +112,7 @@ class UnifiedConfig:
         self.feishu = self._load_feishu_from_env()
         self.ai_accuracy = self._load_ai_accuracy_from_env()
         self.redis = self._load_redis_from_env()
+        self.embedding = self._load_embedding_from_env()
         self.validate_config()
 
     def _load_database_from_env(self) -> DatabaseConfig:
@@ -172,6 +186,18 @@ class UnifiedConfig:
         logger.info("Redis config loaded.")
         return config
 
+    def _load_embedding_from_env(self) -> EmbeddingConfig:
+        config = EmbeddingConfig(
+            enabled=os.getenv("EMBEDDING_ENABLED", "True").lower() in ('true', '1', 't'),
+            model=os.getenv("EMBEDDING_MODEL", "BAAI/bge-small-zh-v1.5"),
+            dimension=int(os.getenv("EMBEDDING_DIMENSION", 512)),
+            batch_size=int(os.getenv("EMBEDDING_BATCH_SIZE", 32)),
+            similarity_threshold=float(os.getenv("EMBEDDING_SIMILARITY_THRESHOLD", 0.5)),
+            cache_ttl=int(os.getenv("EMBEDDING_CACHE_TTL", 86400)),
+        )
+        logger.info("Embedding config loaded.")
+        return config
+
     def validate_config(self):
         """在启动时验证关键配置"""
         if not self.database.url:
@@ -193,6 +219,7 @@ class UnifiedConfig:
             'feishu': asdict(self.feishu),
             'ai_accuracy': asdict(self.ai_accuracy),
             'redis': asdict(self.redis),
+            'embedding': asdict(self.embedding),
         }
 
 # --- 全局单例模式 ---