Add dialog parity PR checklist (WL-0MO5O00UN001OD9J)

[SorraTheOrc]

Summary

Added a manual verification checklist for TUI dialogs that reviewers can use to verify dialog parity after refactoring changes.

Changes

• Created with manual verification steps for:
  • Create Dialog (Shift+C): verify fields present, submit works
  • Update Dialog (u): verify fields, change priority, submit works
  • Visual inspection: borders, labels, positioning

Smoke-run Observations

Analysis of dialogs component and tests confirms:

• Create dialog: 4 widgets (title, description, issue type, priority)
• Update dialog: 4 widgets (status, stage, priority, comment)
• All dialogs have proper borders, labels, and centered positioning
• Tests pass: dialog-integration.test.ts (2 tests)

Testing

All tests pass: 1465 passed, 9 skipped

Work Item

• WL-0MO5O00UN001OD9J (child of WL-0MNX4D4G8009XZNJ)

Review Focus

Please verify the checklist in is comprehensive for future dialog changes.