feat: 实现跨 API 格式自动转换功能

- 新增端点级 format_acceptance_config 配置，控制是否接受跨格式请求
- 重构 EndpointFormDialog 为卡片式布局，支持内联编辑和格式转换开关
- StreamProcessor 实现流式响应的跨格式转换，支持 OpenAI/Claude/Gemini 互转
- CacheAwareScheduler 按端点格式筛选候选，同格式优先于跨格式
- 健康度/熔断按 Provider 端点格式分桶，而非客户端请求格式
- 新增 format_conversion_total 和 format_conversion_duration_seconds 指标
- 新增全局配置 format_conversion_enabled 控制总开关
- Input 组件新增 size="sm" 尺寸选项

tests/services/test_format_conversion_health_buckets.py

@@ -0,0 +1,110 @@
+from contextlib import asynccontextmanager
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import pytest
+
+from src.core.api_format import APIFormat
+from src.services.orchestration.error_classifier import ErrorClassifier
+from src.services.request.executor import RequestExecutor
+
+
+@asynccontextmanager
+async def _noop_async_cm():
+    yield
+
+
+@pytest.mark.asyncio
+async def test_executor_records_health_by_provider_format() -> None:
+    db = MagicMock()
+
+    concurrency_manager = MagicMock()
+    concurrency_manager.get_current_concurrency = AsyncMock(return_value=(0, 0))
+    concurrency_manager.get_key_rpm_count = AsyncMock(return_value=1)
+    concurrency_manager.rpm_guard = MagicMock(return_value=_noop_async_cm())
+
+    adaptive_manager = MagicMock()
+
+    provider = MagicMock()
+    provider.id = "p1"
+    provider.name = "p1"
+
+    endpoint = MagicMock()
+    endpoint.id = "e1"
+    endpoint.api_format = "OPENAI"
+
+    key = MagicMock()
+    key.id = "k1"
+    key.api_key = "encrypted"
+    key.rpm_limit = 10
+    key.learned_rpm_limit = None
+    key.cache_ttl_minutes = 0
+
+    candidate = MagicMock()
+    candidate.provider = provider
+    candidate.endpoint = endpoint
+    candidate.key = key
+    candidate.is_cached = False
+
+    async def request_func(_provider, _endpoint, _key, _candidate):  # noqa: ANN001
+        return {"ok": True}
+
+    with patch("src.services.request.executor.RequestCandidateService.mark_candidate_started"), patch(
+        "src.services.request.executor.RequestCandidateService.mark_candidate_success"
+    ), patch("src.services.request.executor.get_adaptive_reservation_manager") as mock_res_mgr, patch(
+        "src.services.request.executor.health_monitor.record_success"
+    ) as record_success:
+        mock_res_mgr.return_value.calculate_reservation.return_value = MagicMock(
+            ratio=0.0, phase="stable", confidence=1.0
+        )
+
+        executor = RequestExecutor(db=db, concurrency_manager=concurrency_manager, adaptive_manager=adaptive_manager)
+        await executor.execute(
+            candidate=candidate,
+            candidate_id="c1",
+            candidate_index=0,
+            user_api_key=MagicMock(user_id="u1", id="ak1"),
+            request_func=request_func,
+            request_id="r1",
+            api_format=APIFormat.CLAUDE,  # client_format
+            model_name="m",
+            is_stream=False,
+        )
+
+        record_success.assert_called()
+        assert record_success.call_args.kwargs["api_format"] == "OPENAI"
+
+
+@pytest.mark.asyncio
+async def test_error_classifier_records_failure_by_provider_format() -> None:
+    db = MagicMock()
+    classifier = ErrorClassifier(db=db, cache_scheduler=None, adaptive_manager=MagicMock())
+
+    provider = MagicMock()
+    provider.name = "p1"
+
+    endpoint = MagicMock()
+    endpoint.id = "e1"
+    endpoint.api_format = "OPENAI"
+
+    key = MagicMock()
+    key.id = "k1"
+
+    with patch("src.services.orchestration.error_classifier.health_monitor.record_failure") as record_failure:
+        await classifier.handle_retriable_error(
+            error=RuntimeError("boom"),
+            provider=provider,
+            endpoint=endpoint,
+            key=key,
+            affinity_key="aff",
+            api_format=APIFormat.CLAUDE,  # client_format
+            global_model_id="gm1",
+            captured_key_concurrent=None,
+            elapsed_ms=None,
+            request_id="r1",
+            attempt=1,
+            max_attempts=2,
+        )
+
+        record_failure.assert_called()
+        assert record_failure.call_args.kwargs["api_format"] == "OPENAI"
+