feat(pool): 增加 OAuth 账号池管理功能

- 新增 pool manager / strategy / health_policy / cost_tracker / redis_ops 等核心模块
- 新增 pool admin API 路由与 schemas
- 新增 OAuth 账号类型解析 (oauth_plan)
- 前端增加 PoolManagement 页面、PoolConfigDialog、PoolImportDialog、PoolStatusCard 组件
- 补充 pool config / cost tracker / health policy / manager / strategy / trace 等测试

tests/services/test_pool_strategy.py

@@ -0,0 +1,65 @@
+"""Tests for pool scheduling strategy registry."""
+
+from __future__ import annotations
+
+from src.services.provider.pool.strategy import (
+    _strategy_registry,
+    get_active_strategies,
+    get_pool_strategy,
+    register_pool_strategy,
+)
+
+
+class _DummyStrategy:
+    name = "dummy"
+
+    def compute_score(self, *, key_id, config, context):
+        return 42.0
+
+
+class _AnotherStrategy:
+    name = "another"
+
+    def on_before_select(self, *, provider_id, key_ids, config, context):
+        return key_ids[:1]
+
+
+def setup_function():
+    _strategy_registry.clear()
+
+
+def teardown_function():
+    _strategy_registry.clear()
+
+
+def test_register_and_get() -> None:
+    s = _DummyStrategy()
+    register_pool_strategy("dummy", s)
+    assert get_pool_strategy("dummy") is s
+
+
+def test_get_nonexistent() -> None:
+    assert get_pool_strategy("nonexistent") is None
+
+
+def test_get_active_strategies_filters_by_name() -> None:
+    s1 = _DummyStrategy()
+    s2 = _AnotherStrategy()
+    register_pool_strategy("dummy", s1)
+    register_pool_strategy("another", s2)
+
+    active = get_active_strategies(["dummy"])
+    assert len(active) == 1
+    assert active[0] is s1
+
+    active_both = get_active_strategies(["dummy", "another"])
+    assert len(active_both) == 2
+
+    active_none = get_active_strategies(["missing"])
+    assert len(active_none) == 0
+
+
+def test_get_active_strategies_empty_names() -> None:
+    register_pool_strategy("dummy", _DummyStrategy())
+    assert get_active_strategies([]) == []
+    assert get_active_strategies(()) == []