chore: simplify issue and PR templates (#754)

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,68 +1,19 @@
 ## Summary
 
-<!-- One-sentence summary of what this PR does. -->
+<!-- One sentence. -->
 
-Fixes #<!-- issue number -->
-
-## Type of change
-
-<!-- Check the type that applies. Delete the rest. -->
-
-- [ ] 🐛 Bug fix
-- [ ] ✨ Feature
-- [ ] 🎨 UX improvement
-- [ ] ♻️ Refactor
-- [ ] 🔧 CI / build config
-- [ ] 📝 Documentation
-- [ ] 🔒 Security
-
-## Screenshots / screen recordings
-
-<!-- Required for UI changes. Drag & drop images or link to recordings. -->
-
-_Before:_
-
-_After:_
+Fixes #
 
 ## What changed
 
-<!--
-  Describe the changes in detail — what was wrong, what was done to fix it,
-  key decisions made, trade-offs considered. For UI changes, explain the
-  reasoning behind layout, color, or interaction decisions.
--->
+<!-- What was wrong and what this PR does about it. -->
 
 ## How to test
 
-<!--
-  Steps to verify the change works correctly. Example:
-
-  1. Open the app
-  2. Navigate to …
-  3. Tap …
-  4. Verify that …
--->
+<!-- Steps to verify. -->
 
 ## Checklist
 
-- [ ] Code follows the project's style (ktlint passes)
-- [ ] No new compiler warnings introduced
-- [ ] If adding a new screen, checked that existing screens don't already cover the functionality (see `NavigationKeys.kt`/`ls ui/`)
-- [ ] Routes all navigation through `NavigationController.navigateTo()` — no raw `backStack.add()` from UI callbacks
-- [ ] Uses `HermesScaffold` instead of raw `Scaffold` for new/rewritten screens
-- [ ] Room schema directory updated if entities changed
-- [ ] Tested the change on a real device or CI APK
-- [ ] CI is green (all checks pass: ktlint, Android Lint, unit tests, build)
-
-## Related issues
-
-<!--
-  Link any related issues, PRs, or discussions.
-  e.g., Closes #N, Refs #M, Related to #P
--->
-
-## Notes for reviewers
-
-<!--
-  Any gotchas, follow-up work, or things to watch out for.
--->
+- [ ] ktlint and CI pass
+- [ ] Tested on a device or CI APK
+- [ ] Navigation goes through `NavigationController.navigateTo()`