fix: unify backend port to 18080 and make validator targets configurable

- Set default API port to 18080 in config.py
- Add configurable validation_targets to SettingsSchema and DEFAULT_SETTINGS
- Update ValidatorService to support runtime test URL updates
- Hot-reload validation_targets from DB on startup and on settings save
- Add domestic fallback URLs (baidu.com, qq.com) to reduce foreign dependency risk
- Update Settings.vue to allow adding/removing validator target URLs in UI

app/services/validator_service.py

@@ -4,7 +4,7 @@ import random
 import time
 import aiohttp
 import aiohttp_socks
-from typing import Tuple, Optional
+from typing import Tuple, Optional, List
 
 from app.core.config import settings as app_settings
 from app.core.log import logger
@@ -16,10 +16,20 @@ class ValidatorService:
     支持动态读取配置，实现设置热更新。
     """
 
-    # 测试 URL
-    TEST_URLS = {
-        "http": ["http://httpbin.org/ip", "http://api.ipify.org"],
-        "https": ["https://httpbin.org/ip", "https://api.ipify.org"],
+    # 测试 URL 默认池
+    DEFAULT_TEST_URLS = {
+        "http": [
+            "http://httpbin.org/ip",
+            "http://api.ipify.org",
+            "http://www.baidu.com",
+            "http://www.qq.com",
+        ],
+        "https": [
+            "https://httpbin.org/ip",
+            "https://api.ipify.org",
+            "https://www.baidu.com",
+            "https://www.qq.com",
+        ],
     }
 
     def __init__(
@@ -37,6 +47,7 @@ class ValidatorService:
         self._http_session: Optional[aiohttp.ClientSession] = None
         self._semaphore: Optional[asyncio.Semaphore] = None
         self._lock = asyncio.Lock()
+        self._test_urls: Optional[List[str]] = None
 
     @property
     def timeout(self) -> float:
@@ -75,7 +86,17 @@ class ValidatorService:
         return self._semaphore
 
     def _get_test_url(self, protocol: str) -> str:
-        urls = self.TEST_URLS.get(protocol.lower(), self.TEST_URLS["http"])
+        custom_urls = self._test_urls
+        if not custom_urls:
+            from app.core.config import settings as app_settings
+            custom_urls = getattr(app_settings, "validator_test_urls", None)
+        if custom_urls and isinstance(custom_urls, list) and len(custom_urls) > 0:
+            # 按协议过滤自定义 URL，如果没有匹配的则使用全部
+            filtered = [u for u in custom_urls if u.lower().startswith(protocol.lower())]
+            if filtered:
+                return random.choice(filtered)
+            return random.choice(custom_urls)
+        urls = self.DEFAULT_TEST_URLS.get(protocol.lower(), self.DEFAULT_TEST_URLS["http"])
         return random.choice(urls)
 
     async def validate(self, ip: str, port: int, protocol: str = "http") -> Tuple[bool, float]:
@@ -133,6 +154,10 @@ class ValidatorService:
                     return True, latency
                 return False, 0.0
 
+    def update_test_urls(self, urls: List[str]) -> None:
+        """运行时更新验证目标 URL 列表"""
+        self._test_urls = list(urls) if urls else None
+
     async def close(self) -> None:
         """关闭共享的 HTTP ClientSession"""
         if self._http_session and not self._http_session.closed: