fix: update Playwright test selectors to match actual UI

- Use specific command palette placeholder to avoid ambiguous matches
- Fix 'Quick Actions' scoping (two elements with same text)
- Fix 'Resolved' exact match on session detail page
- Fix tree editor to use getByText instead of getByDisplayValue
- Fix 'Add Step' strict mode by using .first()
- Fix fallback description placeholder text
- Update playwright.config.ts to use port 5433 and resolutionflow DB
- Update FlowPilot chat selectors to match actual page layout

11/17 new tests now passing. Remaining 6 need procedural session
navigation investigation.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/e2e/session-to-flow.spec.ts

@@ -25,11 +25,10 @@ test.describe('session-to-flow converter smoke tests', () => {
       await page.goto(`/sessions/${session.id}`)
 
       // Session detail page should load with completed status
-      await expect(page.getByText('Resolved')).toBeVisible({ timeout: 10000 })
+      await expect(page.getByText('Resolved', { exact: true })).toBeVisible({ timeout: 10000 })
 
       // Should show the Create Flow from Session button
-      const createFlowButton = page.getByRole('button', { name: /Create Flow from Session/ })
-      await expect(createFlowButton).toBeVisible()
+      await expect(page.getByText('Create Flow from Session')).toBeVisible()
     } finally {
       await disposeApiContext(api)
     }