fix(providers): 允许 max_probe_interval_minutes 设为 0 并修复零值被覆盖的问题

- 将 max_probe_interval_minutes 校验范围从 2-32 改为 0-32
- 修复 routes.py 中 max_probe_interval_minutes 和 cache_ttl_minutes
  使用 `or` 短路导致零值被默认值覆盖的问题，改用 is not None 判断
- 前端表单同步调整最小值约束和提示文案
- 新增零值校验的单元测试

frontend/src/features/providers/components/KeyFormDialog.vue

@@ -232,14 +232,14 @@
             id="max_probe_interval_minutes"
             :model-value="form.max_probe_interval_minutes ?? ''"
             type="number"
-            min="2"
+            min="0"
             max="32"
             placeholder="32"
             class="h-8"
-            @update:model-value="(v) => form.max_probe_interval_minutes = parseNumberInput(v, { min: 2, max: 32 }) ?? 32"
+            @update:model-value="(v) => form.max_probe_interval_minutes = parseNumberInput(v, { min: 0, max: 32 }) ?? 32"
           />
           <p class="text-xs text-muted-foreground mt-0.5">
-            分钟，2-32
+            分钟，0-32
           </p>
         </div>
       </div>

frontend/src/features/providers/components/OAuthKeyEditDialog.vue

@@ -100,14 +100,14 @@
             id="max_probe_interval_minutes"
             :model-value="form.max_probe_interval_minutes ?? ''"
             type="number"
-            min="2"
+            min="0"
             max="32"
             placeholder="32"
             class="h-8"
-            @update:model-value="(v) => form.max_probe_interval_minutes = parseNumberInput(v, { min: 2, max: 32 }) ?? 32"
+            @update:model-value="(v) => form.max_probe_interval_minutes = parseNumberInput(v, { min: 0, max: 32 }) ?? 32"
           />
           <p class="text-xs text-muted-foreground mt-0.5">
-            2-32分钟
+            0-32分钟
           </p>
         </div>
       </div>

src/api/admin/pool/routes.py

@@ -846,9 +846,13 @@ class AdminListPoolKeysAdapter(AdminApiAdapter):
                     rate_multipliers=rate_multipliers,
                     internal_priority=int(getattr(k, "internal_priority", 50) or 50),
                     rpm_limit=getattr(k, "rpm_limit", None),
-                    cache_ttl_minutes=int(getattr(k, "cache_ttl_minutes", 5) or 5),
-                    max_probe_interval_minutes=int(
-                        getattr(k, "max_probe_interval_minutes", 32) or 32
+                    cache_ttl_minutes=(
+                        v if (v := getattr(k, "cache_ttl_minutes", None)) is not None else 5
+                    ),
+                    max_probe_interval_minutes=(
+                        v
+                        if (v := getattr(k, "max_probe_interval_minutes", None)) is not None
+                        else 32
                     ),
                     note=getattr(k, "note", None),
                     allowed_models=allowed_models,

src/models/endpoint_models.py

@@ -475,7 +475,7 @@ class EndpointAPIKeyCreate(BaseModel):
         default=5, ge=0, le=60, description="缓存 TTL（分钟），0=禁用，默认5分钟"
     )
     max_probe_interval_minutes: int = Field(
-        default=32, ge=2, le=32, description="熔断探测间隔（分钟），范围 2-32"
+        default=32, ge=0, le=32, description="熔断探测间隔（分钟），范围 0-32"
     )
 
     # 备注
@@ -631,7 +631,7 @@ class EndpointAPIKeyUpdate(BaseModel):
         default=None, ge=0, le=60, description="缓存 TTL（分钟），0=禁用"
     )
     max_probe_interval_minutes: int | None = Field(
-        default=None, ge=2, le=32, description="熔断探测间隔（分钟），范围 2-32"
+        default=None, ge=0, le=32, description="熔断探测间隔（分钟），范围 0-32"
     )
     is_active: bool | None = Field(default=None, description="是否启用")
     note: str | None = Field(default=None, max_length=500, description="备注说明")

tests/services/test_provider_keys_key_command_service.py

@@ -9,7 +9,7 @@ from typing import Any, cast
 import pytest
 
 from src.core.exceptions import InvalidRequestException
-from src.models.endpoint_models import EndpointAPIKeyUpdate
+from src.models.endpoint_models import EndpointAPIKeyCreate, EndpointAPIKeyUpdate
 
 
 async def _noop_invalidate_models_list_cache() -> None:
@@ -72,6 +72,25 @@ def _build_key(**overrides: Any) -> SimpleNamespace:
     return SimpleNamespace(**base)
 
 
+def test_key_create_accepts_zero_max_probe_interval_minutes() -> None:
+    payload = EndpointAPIKeyCreate.model_validate(
+        {
+            "name": "key-1",
+            "api_key": "secret",
+            "api_formats": ["openai:chat"],
+            "max_probe_interval_minutes": 0,
+        }
+    )
+
+    assert payload.max_probe_interval_minutes == 0
+
+
+def test_key_update_accepts_zero_max_probe_interval_minutes() -> None:
+    payload = EndpointAPIKeyUpdate.model_validate({"max_probe_interval_minutes": 0})
+
+    assert payload.max_probe_interval_minutes == 0
+
+
 def test_prepare_update_payload_auth_type_null_ignored() -> None:
     key = _build_key(auth_type="api_key")
     key_data = EndpointAPIKeyUpdate.model_validate({"auth_type": None})