AI PR Checklist Generator

Generate a 6-section PR checklist (Acceptance, Manual test, Build, Files-not-to-change, Rollback, Summary) for .github/PULL_REQUEST_TEMPLATE.md.

PULL_REQUEST_TEMPLATE.md

          ## Acceptance Criteria
- [ ] Feature works as described in the issue or design doc
- [ ] Build passes (`pnpm build`)
- [ ] No TypeScript errors (`pnpm check`)

## Manual Test Checklist
- [ ] Walk through the feature path from a clean state and confirm each step renders
- [ ] Tested on mobile viewport (375px wide)
- [ ] Verified in light and dark mode

## Build & Test Commands
```
pnpm build
pnpm check
pnpm test
```

## Files That Should Not Change
- [ ] package.json (unless this feature requires a new dep)
- [ ] astro.config.mjs
- [ ] Existing tests for unrelated features

## Rollback Condition
If the feature is broken in production or fails the manual test checklist, revert this PR by reverting the merge commit.

## PR Summary
**What changed:** [Fill in]
**Why:** [Fill in]
**How to verify:** Run the Manual Test Checklist above.
**Risk level:** [Low / Medium / High]