docs(ui): Add UI layout refactor plan and OpenSpec changes

- Update decision-log with UI layout decisions (Feb 18, 2026)
- Update architecture with frontend layout patterns
- Update config.yaml with TDD, documentation, UI standards rules
- Create p00-api-documentation change (Scribe annotations)
- Create p01-ui-foundation change (types, stores, Lucide)
- Create p02-app-layout change (AppLayout, Sidebar, TopBar)
- Create p03-dashboard-enhancement change (PageHeader, StatCard)
- Create p04-content-patterns change (DataTable, FilterBar)
- Create p05-page-migrations change (page migrations)
- Fix E2E auth tests (11/11 passing)
- Add JWT expiry validation to dashboard guard

docs/README.md

@@ -177,6 +177,8 @@ git tag -a v1.0-docs -m "Initial documentation complete"
 | What's the data model? | Architecture | Data Model |
 | What are the success metrics? | Executive Summary | Success Metrics |
 | What's the testing strategy? | Architecture | Quality Standards |
+| **UI Layout approach?** | **Decision Log** | **UI Layout Decisions** |
+| **Sidebar + TopBar pattern?** | **Architecture** | **Frontend Layout Architecture** |
 
 ## Questions or Updates?
 
@@ -184,5 +186,5 @@ Contact: Santhosh J (Project Owner)
 
 ---
 
-**Last Updated:** February 17, 2026  
-**Documentation Version:** 1.0  
+**Last Updated:** February 18, 2026  
+**Documentation Version:** 1.1