feat: add Claude subagent model config (#4830)

* feat: add Claude subagent takeover config

* feat: add Claude subagent model field

* i18n: add Claude subagent model labels

* fix(proxy): preserve configured subagent model mapping

* fix(providers): exclude subagent model from Claude common config

* style: format rust code

tests/components/ClaudeFormFields.test.tsx

@@ -85,6 +85,7 @@ const renderCopilotForm = (overrides: Partial<ClaudeFormFieldsProps> = {}) => {
     defaultOpusModelName: "",
     defaultFableModel: "",
     defaultFableModelName: "",
+    subagentModel: "",
     onModelChange: vi.fn(),
     speedTestEndpoints: [],
     apiFormat: "anthropic",
@@ -173,4 +174,25 @@ describe("ClaudeFormFields", () => {
       );
     });
   });
+
+  it("一键设置会同时写入 Subagent 模型", () => {
+    const onModelChange = vi.fn();
+    renderCopilotForm({
+      claudeModel: "shared-model[1M]",
+      defaultSonnetModel: "",
+      defaultSonnetModelName: "",
+      onModelChange,
+    });
+
+    fireEvent.click(
+      screen.getByRole("button", {
+        name: "一键设置",
+      }),
+    );
+
+    expect(onModelChange).toHaveBeenCalledWith(
+      "CLAUDE_CODE_SUBAGENT_MODEL",
+      "shared-model[1M]",
+    );
+  });
 });