test: update palette-item count for the new trigger-system-event node

Caught by the full Playwright run: adding trigger-system-event
(previous commit) makes the canvas palette 26 items, not 25 -- the
seed's own presence, correctly reflected.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FYwojT8GdUbYSoggbvEFft

Author: alicoding

frontend/e2e/composition.spec.ts

@@ -192,8 +192,9 @@ test('Composition page lists built-in workflows; node primitives live in a colla
   // process-extract-html, capture-clipboard-info (the save-page
   // capture floor + clipboard inspector, docs/adr/0030 / SPEC.md §5) +
   // list-search (docs/goals/0011-lists-maturation.md's richer, typed
-  // successor to list-lookup).
-  await expect(activePanel(page).getByTestId('palette-item')).toHaveCount(25)
+  // successor to list-lookup) + trigger-system-event (docs/adr/0035's
+  // unparked System/meta trigger).
+  await expect(activePanel(page).getByTestId('palette-item')).toHaveCount(26)
 })
 
 test('A new workflow starts with a starter node placed, not a blank canvas', async ({ page }) => {