Fix token usage handling and developer proxy save UX (#704)

tests/e2e/settings-proxy.spec.ts

@@ -0,0 +1,49 @@
+import type { Locator, Page } from '@playwright/test';
+import { completeSetup, expect, test } from './fixtures/electron';
+
+async function ensureSwitchState(toggle: Locator, checked: boolean): Promise<void> {
+  const currentState = await toggle.getAttribute('data-state');
+  const isChecked = currentState === 'checked';
+  if (isChecked !== checked) {
+    await toggle.click();
+  }
+}
+
+async function readProxyEnabled(page: Page): Promise<boolean> {
+  return await page.evaluate(async () => {
+    const settings = await window.electron.ipcRenderer.invoke('settings:getAll');
+    return Boolean(settings?.proxyEnabled);
+  });
+}
+
+test.describe('ClawX developer proxy settings', () => {
+  test('keeps proxy save available when disabling proxy in developer mode', async ({ page }) => {
+    await completeSetup(page);
+
+    await page.getByTestId('sidebar-nav-settings').click();
+    await expect(page.getByTestId('settings-page')).toBeVisible();
+
+    const devModeToggle = page.getByTestId('settings-dev-mode-switch');
+    await expect(devModeToggle).toBeVisible();
+    await ensureSwitchState(devModeToggle, true);
+
+    const proxySection = page.getByTestId('settings-proxy-section');
+    const proxyToggle = page.getByTestId('settings-proxy-toggle');
+    const proxySaveButton = page.getByTestId('settings-proxy-save-button');
+
+    await expect(proxySection).toBeVisible();
+    await expect(proxyToggle).toBeVisible();
+    await expect(proxySaveButton).toBeVisible();
+
+    await ensureSwitchState(proxyToggle, true);
+    await expect(proxySaveButton).toBeEnabled();
+    await proxySaveButton.click();
+    await expect.poll(async () => await readProxyEnabled(page)).toBe(true);
+
+    await ensureSwitchState(proxyToggle, false);
+    await expect(proxySaveButton).toBeVisible();
+    await expect(proxySaveButton).toBeEnabled();
+    await proxySaveButton.click();
+    await expect.poll(async () => await readProxyEnabled(page)).toBe(false);
+  });
+});