feat(codex-dashboard): add manual long-context controls

ui/tests/unit/components/compatible-cli/codex-overview-tab.test.tsx

@@ -30,6 +30,8 @@ function buildDiagnostics(activeProfile: string | null): CodexDashboardDiagnosti
     config: {
       model: 'gpt-5.4',
       modelReasoningEffort: null,
+      modelContextWindow: null,
+      modelAutoCompactTokenLimit: null,
       modelProvider: 'openai',
       activeProfile,
       approvalPolicy: null,

ui/tests/unit/components/compatible-cli/codex-top-level-controls-card.test.tsx

@@ -11,6 +11,8 @@ describe('CodexTopLevelControlsCard', () => {
         values={{
           model: null,
           modelReasoningEffort: null,
+          modelContextWindow: null,
+          modelAutoCompactTokenLimit: null,
           modelProvider: null,
           approvalPolicy: null,
           sandboxMode: null,
@@ -34,4 +36,69 @@ describe('CodexTopLevelControlsCard', () => {
     expect(onSave).toHaveBeenCalledTimes(1);
     expect(onSave).toHaveBeenCalledWith({ model: 'gpt-5.4-mini' });
   });
+
+  it('submits manual long-context overrides without auto-filling defaults', async () => {
+    const onSave = vi.fn();
+
+    render(
+      <CodexTopLevelControlsCard
+        values={{
+          model: 'gpt-5.4',
+          modelReasoningEffort: null,
+          modelContextWindow: null,
+          modelAutoCompactTokenLimit: null,
+          modelProvider: null,
+          approvalPolicy: null,
+          sandboxMode: null,
+          webSearch: null,
+          toolOutputTokenLimit: null,
+          personality: null,
+        }}
+        providerNames={[]}
+        onSave={onSave}
+      />
+    );
+
+    await userEvent.type(screen.getByLabelText('Model context window'), '800000');
+    await userEvent.type(screen.getByLabelText('Auto-compact token limit'), '700000');
+    await userEvent.click(screen.getByRole('button', { name: 'Save top-level settings' }));
+
+    expect(onSave).toHaveBeenCalledWith({
+      modelContextWindow: 800000,
+      modelAutoCompactTokenLimit: 700000,
+    });
+  });
+
+  it('fills draft starter values without saving automatically', async () => {
+    const onSave = vi.fn();
+
+    render(
+      <CodexTopLevelControlsCard
+        values={{
+          model: 'gpt-5.4',
+          modelReasoningEffort: null,
+          modelContextWindow: null,
+          modelAutoCompactTokenLimit: null,
+          modelProvider: null,
+          approvalPolicy: null,
+          sandboxMode: null,
+          webSearch: null,
+          toolOutputTokenLimit: null,
+          personality: null,
+        }}
+        providerNames={[]}
+        onSave={onSave}
+      />
+    );
+
+    expect(screen.getByText('Manual opt-in only')).toBeInTheDocument();
+    expect(screen.getByText('1.05M / 1M')).toBeInTheDocument();
+
+    await userEvent.click(screen.getByRole('button', { name: 'Fill cautious pair' }));
+
+    expect(onSave).not.toHaveBeenCalled();
+    expect(screen.getByLabelText('Model context window')).toHaveValue(800000);
+    expect(screen.getByLabelText('Auto-compact token limit')).toHaveValue(700000);
+    expect(screen.getByRole('button', { name: 'Save top-level settings' })).toBeEnabled();
+  });
 });