feat: consume server model reasoning capabilities

tests/unit/coding-feature-ui.test.tsx

@@ -528,6 +528,61 @@ describe('PI-130 feature-complete Coding UI', () => {
     expect(screen.queryByRole('menu', { name: '选择推理强度' })).not.toBeInTheDocument();
   });
 
+  it('shows the native max thinking level as 最高', async () => {
+    const { CodingComposerRuntimeControls } = await import('@/pages/Chat/CodingComposerRuntimeControls');
+    const conversation = {
+      id: 'conversation-max-thinking',
+      agentId: 'agent-1',
+      title: 'Max thinking controls',
+      archivedAt: null,
+      unread: false,
+      createdAt: '2026-08-28T00:00:00.000Z',
+      updatedAt: '2026-08-28T00:00:00.000Z',
+      model: { accountId: 'account-1', modelId: 'deepseek-v4-pro', thinkingLevel: 'max' as const },
+      modelResolution: 'resolved' as const,
+    };
+    const snapshot: ConversationSnapshot = {
+      schemaVersion: 1,
+      conversation: {
+        id: conversation.id,
+        projectId: 'project-1',
+        agentId: conversation.agentId,
+        title: conversation.title,
+        model: {
+          model: conversation.model,
+          modelResolution: 'resolved',
+          availableThinkingLevels: ['off', 'low', 'high', 'max'],
+        },
+      },
+      nodes: [],
+      run: { status: 'idle' },
+      queue: { items: [] },
+      context: { usedTokens: 0, contextWindow: 0, compaction: 'idle' },
+      pendingInteractions: [],
+      worker: { status: 'ready', generation: 1 },
+      cursor: { workerGeneration: 1, seq: 0 },
+    };
+
+    render(
+      <CodingComposerRuntimeControls
+        conversation={conversation}
+        snapshot={snapshot}
+        onRefresh={vi.fn(async () => undefined)}
+      />,
+    );
+
+    const settingsTrigger = screen.getByRole('button', {
+      name: '模型与思考设置：deepseek-v4-pro，最高',
+    });
+    expect(settingsTrigger).toHaveTextContent('最高');
+    fireEvent.pointerDown(settingsTrigger, { button: 0, ctrlKey: false });
+    const thinkingRow = await screen.findByRole('menuitem', { name: '推理强度 最高' });
+    fireEvent.click(thinkingRow);
+    expect(screen.getByRole('menuitemradio', { name: '最高' })).toBeInTheDocument();
+    expect(screen.queryByRole('menuitemradio', { name: '极简' })).not.toBeInTheDocument();
+    expect(screen.queryByRole('menuitemradio', { name: '中等' })).not.toBeInTheDocument();
+  });
+
   it('blocks overlapping mutations but keeps abort and recover available while confirmation is uncertain', async () => {
     interactionApi.abort.mockResolvedValue(undefined);
     const recover = vi.fn(async () => undefined);