修复网页对话并接入 SearXNG 搜索

app/config.py

@@ -67,6 +67,11 @@ def _env_float(key: str, default: float) -> float:
         return default
 
 
+def _env_bool(key: str, default: bool) -> bool:
+    value = _env(key, "true" if default else "false").strip().lower()
+    return value in {"1", "true", "yes", "on"}
+
+
 # ---------------------------------------------------------------- LLM
 
 @dataclass
@@ -133,6 +138,24 @@ class ContextConfig:
     memory_timeout_s: float = 0.3     # 检索超时，方案要求"记忆失败不阻塞对话"
 
 
+# ---------------------------------------------------------------- 联网搜索
+
+@dataclass
+class SearchConfig:
+    """SearXNG 搜索后端。
+
+    默认关闭，避免开发机没有 SearXNG 时改变普通对话行为；部署机显式设置
+    SEARCH_ENABLED=true。服务只需暴露在助手所在机器的回环地址。
+    """
+
+    enabled: bool = field(default_factory=lambda: _env_bool("SEARCH_ENABLED", False))
+    base_url: str = field(
+        default_factory=lambda: _env("SEARXNG_BASE_URL", "http://127.0.0.1:18080"))
+    timeout_s: float = field(default_factory=lambda: _env_float("SEARCH_TIMEOUT_S", 6.0))
+    max_results: int = field(default_factory=lambda: _env_int("SEARCH_MAX_RESULTS", 5))
+    language: str = field(default_factory=lambda: _env("SEARCH_LANGUAGE", "zh-CN"))
+
+
 # ---------------------------------------------------------------- 语音
 
 def _default_model_dir() -> Path:
@@ -199,6 +222,7 @@ class AppConfig:
     llm: LLMConfig = field(default_factory=local_llm_config)
     llm_fallback: LLMConfig = field(default_factory=deepseek_config)
     context: ContextConfig = field(default_factory=ContextConfig)
+    search: SearchConfig = field(default_factory=SearchConfig)
     voice: VoiceConfig = field(default_factory=VoiceConfig)
     memory: MemoryConfig = field(default_factory=MemoryConfig)
 
@@ -212,6 +236,6 @@ class AppConfig:
 
 
 __all__ = [
-    "AppConfig", "LLMConfig", "ContextConfig", "VoiceConfig", "MemoryConfig",
+    "AppConfig", "LLMConfig", "ContextConfig", "SearchConfig", "VoiceConfig", "MemoryConfig",
     "load_env", "local_llm_config", "deepseek_config", "PROJECT_ROOT", "ENV_FILE",
 ]