chore(test): Implement E2E sync smoke test

tests/e2e/sync.spec.ts

@@ -0,0 +1,77 @@
+import { test, expect } from '@playwright/test';
+
+test.describe('iCalendar Sync E2E', () => {
+  test('should install plug and sync without console errors', async ({ page }) => {
+    const errors: string[] = [];
+    
+    // Listen for console errors
+    page.on('console', msg => {
+      if (msg.type() === 'error' || msg.text().includes('TypeError')) {
+        errors.push(msg.text());
+        console.error('Browser Console Error:', msg.text());
+      }
+    });
+
+    // 1. Login
+    await page.goto('/');
+    await page.fill('input[name="username"]', 'admin');
+    await page.fill('input[name="password"]', 'admin');
+    await page.click('button[type="submit"]');
+    
+    // Wait for the editor to load
+    await expect(page.locator('#sb-main')).toBeVisible({ timeout: 10000 });
+
+    // 2. Install Plug (Mocking the installation by writing to PLUGS.md or using command)
+    // For this test, we assume the built plug is served or we use the local raw link.
+    // We'll use the 'Plugs: Add' command if possible, or just write to PLUGS.md.
+    
+    // Let's use the keyboard to trigger the command palette
+    await page.keyboard.press('Control+Enter'); // Or whatever the shortcut is. Default is Cmd/Ctrl-Enter or /
+    // Wait for palette
+    // Actually, writing to PLUGS.md is more reliable for automation
+    
+    // Navigate to PLUGS
+    await page.goto('/PLUGS');
+    await page.waitForSelector('.cm-content');
+    
+    // Clear and write the local plug URI
+    // In our docker-compose, the host files are at /work
+    // But SB needs a URI. We'll use the gitea link or a local mock server link.
+    // For now, let's assume we want to test the built file in the test space.
+    
+    const plugUri = 'gh:sstent/silverbullet-icalendar/icalendar.plug.js'; // Fallback or use local
+    await page.locator('.cm-content').fill(`- ${plugUri}`);
+    await page.keyboard.press('Control+s'); // Save
+    
+    // Trigger Plugs: Update
+    await page.keyboard.press('Control+Enter');
+    await page.fill('input[placeholder="Command"]', 'Plugs: Update');
+    await page.keyboard.press('Enter');
+    
+    // Wait for notification or some time
+    await page.waitForTimeout(5000);
+
+    // 3. Configure source in SETTINGS
+    await page.goto('/SETTINGS');
+    await page.waitForSelector('.cm-content');
+    await page.locator('.cm-content').fill(`
+icalendar:
+  sources:
+    - url: http://mock-ics-server/calendar.ics
+      name: TestCalendar
+`);
+    await page.keyboard.press('Control+s');
+    await page.waitForTimeout(2000);
+
+    // 4. Trigger Sync
+    await page.keyboard.press('Control+Enter');
+    await page.fill('input[placeholder="Command"]', 'iCalendar: Sync');
+    await page.keyboard.press('Enter');
+
+    // Wait for sync to complete (flash notification)
+    await page.waitForTimeout(5000);
+
+    // 5. Final check
+    expect(errors).toHaveLength(0);
+  });
+});