fix: 修复同族 API 格式转换判断逻辑

- OPENAI 和 OPENAI_CLI 使用不同协议（Chat Completions vs Responses API），需要转换
- CLAUDE/CLAUDE_CLI、GEMINI/GEMINI_CLI 格式相同仅认证不同，可透传
- 添加 max_completion_tokens 参数支持（OpenAI 新参数名）
- 移除登录表单冗余的 keyup.enter 事件处理

tests/core/api_format/conversion/golden_data/expected/request_CLAUDE_to_OPENAI.json

@@ -16,6 +16,9 @@
     "B"
   ],
   "stream": true,
+  "stream_options": {
+    "include_usage": true
+  },
   "temperature": 0.2,
   "tool_choice": "auto",
   "tools": [

tests/core/api_format/conversion/test_compatibility.py

@@ -161,3 +161,123 @@ def test_conversion_allowed_when_converter_supports_full() -> None:
     assert ok is True
     assert needs_conv is True
     assert reason is None
+
+
+# ==================== 同族格式测试 ====================
+
+
+def test_claude_cli_to_claude_no_conversion_needed() -> None:
+    """CLAUDE 和 CLAUDE_CLI 格式相同，只是认证不同，可透传"""
+    ok, needs_conv, reason = is_format_compatible(
+        "CLAUDE_CLI",
+        "CLAUDE",
+        endpoint_format_acceptance_config=None,
+        is_stream=False,
+        global_conversion_enabled=False,
+        registry=MagicMock(),
+    )
+    assert ok is True
+    assert needs_conv is False
+    assert reason is None
+
+
+def test_claude_to_claude_cli_no_conversion_needed() -> None:
+    """CLAUDE 和 CLAUDE_CLI 格式相同，只是认证不同，可透传"""
+    ok, needs_conv, reason = is_format_compatible(
+        "CLAUDE",
+        "CLAUDE_CLI",
+        endpoint_format_acceptance_config=None,
+        is_stream=False,
+        global_conversion_enabled=False,
+        registry=MagicMock(),
+    )
+    assert ok is True
+    assert needs_conv is False
+    assert reason is None
+
+
+def test_gemini_cli_to_gemini_no_conversion_needed() -> None:
+    """GEMINI 和 GEMINI_CLI 格式相同，只是认证不同，可透传"""
+    ok, needs_conv, reason = is_format_compatible(
+        "GEMINI_CLI",
+        "GEMINI",
+        endpoint_format_acceptance_config=None,
+        is_stream=False,
+        global_conversion_enabled=False,
+        registry=MagicMock(),
+    )
+    assert ok is True
+    assert needs_conv is False
+    assert reason is None
+
+
+def test_openai_cli_to_openai_needs_conversion() -> None:
+    """OPENAI 和 OPENAI_CLI 格式不同（Chat Completions vs Responses API），需要转换"""
+    registry = MagicMock()
+    registry.can_convert_full.return_value = True
+
+    ok, needs_conv, reason = is_format_compatible(
+        "OPENAI_CLI",
+        "OPENAI",
+        endpoint_format_acceptance_config=None,  # 同族转换不需要端点配置
+        is_stream=False,
+        global_conversion_enabled=False,  # 同族转换不需要全局开关
+        registry=registry,
+    )
+    assert ok is True
+    assert needs_conv is True  # 需要转换！
+    assert reason is None
+
+
+def test_openai_to_openai_cli_needs_conversion() -> None:
+    """OPENAI 和 OPENAI_CLI 格式不同（Chat Completions vs Responses API），需要转换"""
+    registry = MagicMock()
+    registry.can_convert_full.return_value = True
+
+    ok, needs_conv, reason = is_format_compatible(
+        "OPENAI",
+        "OPENAI_CLI",
+        endpoint_format_acceptance_config=None,  # 同族转换不需要端点配置
+        is_stream=False,
+        global_conversion_enabled=False,  # 同族转换不需要全局开关
+        registry=registry,
+    )
+    assert ok is True
+    assert needs_conv is True  # 需要转换！
+    assert reason is None
+
+
+def test_openai_cli_to_openai_stream_needs_conversion() -> None:
+    """OPENAI_CLI 流式请求到 OPENAI 也需要转换"""
+    registry = MagicMock()
+    registry.can_convert_full.return_value = True
+
+    ok, needs_conv, reason = is_format_compatible(
+        "OPENAI_CLI",
+        "OPENAI",
+        endpoint_format_acceptance_config=None,
+        is_stream=True,
+        global_conversion_enabled=False,
+        registry=registry,
+    )
+    assert ok is True
+    assert needs_conv is True
+    assert reason is None
+
+
+def test_openai_cli_to_openai_fails_without_converter() -> None:
+    """如果转换器不支持，同族转换也会失败"""
+    registry = MagicMock()
+    registry.can_convert_full.return_value = False
+
+    ok, needs_conv, reason = is_format_compatible(
+        "OPENAI_CLI",
+        "OPENAI",
+        endpoint_format_acceptance_config=None,
+        is_stream=False,
+        global_conversion_enabled=False,
+        registry=registry,
+    )
+    assert ok is False
+    assert needs_conv is False
+    assert reason and "转换器" in reason

tests/core/api_format/conversion/test_openai_normalizer.py

@@ -81,6 +81,39 @@ def test_openai_request_instructions_roundtrip() -> None:
     assert out_messages[3]["content"] == "ok"
 
 
+def test_openai_request_max_completion_tokens_support() -> None:
+    """测试 max_completion_tokens 参数的兼容性（OpenAI API 新参数名）"""
+    n = OpenAINormalizer()
+
+    # 测试 max_completion_tokens 优先于 max_tokens
+    req_new = {
+        "model": "gpt-4o",
+        "messages": [{"role": "user", "content": "hi"}],
+        "max_completion_tokens": 100,
+        "max_tokens": 50,  # 旧参数应被忽略
+    }
+    internal = n.request_to_internal(req_new)
+    assert internal.max_tokens == 100
+
+    # 测试仅使用 max_completion_tokens
+    req_only_new = {
+        "model": "gpt-4o",
+        "messages": [{"role": "user", "content": "hi"}],
+        "max_completion_tokens": 200,
+    }
+    internal = n.request_to_internal(req_only_new)
+    assert internal.max_tokens == 200
+
+    # 测试仅使用 max_tokens（向后兼容）
+    req_only_old = {
+        "model": "gpt-4o",
+        "messages": [{"role": "user", "content": "hi"}],
+        "max_tokens": 150,
+    }
+    internal = n.request_to_internal(req_only_old)
+    assert internal.max_tokens == 150
+
+
 def test_openai_request_tool_calls_and_tool_role_roundtrip() -> None:
     n = OpenAINormalizer()