test: spell out AskUserQuestion everywhere instead of AUQ

Per user feedback: don't shorten AskUserQuestion to AUQ — the
abbreviation reads as cryptic. Apply across all the new code from this
branch:

- Rename test/skill-e2e-auq-format-compliance.test.ts →
  test/skill-e2e-ask-user-question-format-compliance.test.ts
- Touchfile entry auq-format-pty → ask-user-question-format-pty
  (touchfiles.ts + matching assertion in touchfiles.test.ts)
- Function rename navigateToModeAuq → navigateToModeAskUserQuestion
- Variable auqVisible → askUserQuestionVisible
- Outcome literal 'real_auq' → 'real_question'
- All comments + JSDoc + CHANGELOG entry write AskUserQuestion in full
- "AUQs" plural → "AskUserQuestions"

No behavior change. 49/49 free tests still pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

test/skill-e2e-autoplan-chain.test.ts

@@ -99,7 +99,7 @@ describeE2E('/autoplan chain ordering (periodic)', () => {
             const visible = session.visibleSince(since);
 
             // Auto-grant any permission dialog so autoplan can keep moving
-            // through its phases. The autoplan template auto-decides AUQs
+            // through its phases. The autoplan template auto-decides AskUserQuestions
             // it owns; only permission prompts (file/tool grants) need our
             // hand-pressing. Classify on tail to avoid stale matches.
             const recentTail = visible.slice(-1500);