feat: 后台管理增加提供商动态管理功能

- 新增：添加新的大模型接口提供商
- 新增：编辑已有提供商的参数（API地址、Key、模型列表等）
- 新增：删除提供商
- 新增：拖拽排序调整auto模式的优先级顺序
- 新增：启用/禁用提供商开关
- 优化：主服务动态读取配置，后台修改实时生效

config/settings.py

@@ -1,12 +1,19 @@
 """
-大模型API中转系统配置
+大模型API中转系统配置 - 支持动态修改
 """
 
-# 上游模型配置（按优先级排序，从高到低）
-UPSTREAM_PROVIDERS = [
+import json
+from pathlib import Path
+
+# 配置文件路径
+CONFIG_FILE = Path(__file__).parent.parent / 'data' / 'config.json'
+
+# 默认上游模型配置
+DEFAULT_PROVIDERS = [
     {
-        "name": "local-qwen",
-        "priority": 1,  # 数字越小优先级越高
+        "id": "local-qwen",
+        "name": "Local Qwen",
+        "priority": 1,
         "base_url": "http://192.168.2.5:1234/v1",
         "api_key": "sk-lm-fuP5tGU8:Hi7YU87jHyDP6Ay8Tl2j",
         "models": ["qwen3.5-4b", "qwen3.5", "qwen"],
@@ -15,7 +22,8 @@ UPSTREAM_PROVIDERS = [
         "enabled": True,
     },
     {
-        "name": "siliconflow-deepseek",
+        "id": "siliconflow-deepseek",
+        "name": "SiliconFlow DeepSeek",
         "priority": 2,
         "base_url": "https://api.siliconflow.cn/v1",
         "api_key": "sk-fhpoexpptvjghpnphtaxbkhjwulzovoqfffbckcfscjmwhcg",
@@ -26,22 +34,118 @@ UPSTREAM_PROVIDERS = [
     },
 ]
 
-# 模型别名映射
-MODEL_ALIASES = {
-    # auto 自动选择可用模型
+# 默认模型别名
+DEFAULT_MODEL_ALIASES = {
     "auto": "auto",
-    
-    # Qwen别名
     "qwen": "qwen3.5-4b",
     "qwen3.5": "qwen3.5-4b",
     "qwen3.5-4b": "qwen3.5-4b",
-    
-    # DeepSeek别名
     "deepseek": "Pro/deepseek-ai/DeepSeek-V3.2",
     "deepseek-v3": "Pro/deepseek-ai/DeepSeek-V3.2",
     "deepseek-v3.2": "Pro/deepseek-ai/DeepSeek-V3.2",
 }
 
+def load_config():
+    """加载配置"""
+    if CONFIG_FILE.exists():
+        try:
+            data = json.loads(CONFIG_FILE.read_text(encoding='utf-8'))
+            return data
+        except:
+            pass
+    return {
+        "providers": DEFAULT_PROVIDERS,
+        "model_aliases": DEFAULT_MODEL_ALIASES,
+    }
+
+def save_config(config):
+    """保存配置"""
+    CONFIG_FILE.parent.mkdir(parents=True, exist_ok=True)
+    CONFIG_FILE.write_text(json.dumps(config, ensure_ascii=False, indent=2), encoding='utf-8')
+
+def get_providers():
+    """获取提供商列表"""
+    config = load_config()
+    return config.get("providers", DEFAULT_PROVIDERS)
+
+def get_provider(provider_id):
+    """获取单个提供商"""
+    providers = get_providers()
+    for p in providers:
+        if p.get("id") == provider_id:
+            return p
+    return None
+
+def add_provider(provider):
+    """添加提供商"""
+    config = load_config()
+    providers = config.get("providers", [])
+    
+    # 生成ID
+    if not provider.get("id"):
+        provider["id"] = provider["name"].lower().replace(" ", "-").replace(".", "-")
+    
+    providers.append(provider)
+    config["providers"] = providers
+    save_config(config)
+    return provider
+
+def update_provider(provider_id, data):
+    """更新提供商"""
+    config = load_config()
+    providers = config.get("providers", [])
+    
+    for i, p in enumerate(providers):
+        if p.get("id") == provider_id:
+            providers[i] = {**p, **data}
+            config["providers"] = providers
+            save_config(config)
+            return providers[i]
+    return None
+
+def delete_provider(provider_id):
+    """删除提供商"""
+    config = load_config()
+    providers = config.get("providers", [])
+    providers = [p for p in providers if p.get("id") != provider_id]
+    config["providers"] = providers
+    save_config(config)
+    return True
+
+def update_priority(provider_ids):
+    """更新优先级顺序"""
+    config = load_config()
+    providers = config.get("providers", [])
+    
+    # 按新顺序设置优先级
+    for i, pid in enumerate(provider_ids):
+        for p in providers:
+            if p.get("id") == pid:
+                p["priority"] = i + 1
+    
+    config["providers"] = providers
+    save_config(config)
+    return providers
+
+def get_model_aliases():
+    """获取模型别名"""
+    config = load_config()
+    return config.get("model_aliases", DEFAULT_MODEL_ALIASES)
+
+def update_model_alias(alias, target):
+    """更新模型别名"""
+    config = load_config()
+    aliases = config.get("model_aliases", {})
+    aliases[alias] = target
+    config["model_aliases"] = aliases
+    save_config(config)
+    return aliases
+
+# 初始化配置
+config = load_config()
+UPSTREAM_PROVIDERS = config.get("providers", DEFAULT_PROVIDERS)
+MODEL_ALIASES = config.get("model_aliases", DEFAULT_MODEL_ALIASES)
+
 # 服务配置
 SERVER_CONFIG = {
     "host": "0.0.0.0",
@@ -59,18 +163,11 @@ LOG_CONFIG = {
 # 重试配置
 RETRY_CONFIG = {
     "max_retries": 3,
-    "retry_delay": 1,  # 秒
+    "retry_delay": 1,
     "retry_on_errors": [
         "connection_error",
         "timeout",
         "rate_limit",
         "server_error",
     ],
-}
-
-# 健康检查配置
-HEALTH_CHECK = {
-    "enabled": True,
-    "interval": 60,  # 秒
-    "timeout": 10,
 }