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

openspec/changes/p05-page-migrations/proposal.md

@@ -0,0 +1,65 @@
+# Proposal: Page Migrations
+
+## Overview
+Migrate existing pages to use the new layout system and content patterns, completing the UI refactor.
+
+## Goals
+- Migrate Team Members page with DataTable
+- Migrate Projects page with status workflow
+- Create placeholder pages for remaining capabilities
+- Remove old Navigation component
+- Ensure all E2E tests pass
+
+## Non-Goals
+- New functionality (just layout migration)
+- Backend API work
+
+## Priority
+**MEDIUM** - Complete the UI refactor
+
+## Scope
+
+### Pages to Migrate
+1. **Team Members** (`/team-members`)
+   - DataTable with CRUD
+   - FilterBar with search and status filter
+   - Inline edit or modal for create/edit
+
+2. **Projects** (`/projects`)
+   - DataTable with status badges
+   - FilterBar with status/type filters
+   - Status workflow indicators
+
+3. **Allocations** (`/allocations`)
+   - Allocation matrix view (new component)
+   - Month navigation
+   - Inline editing
+
+### Placeholder Pages
+- `/actuals` - Basic page with coming soon
+- `/reports/*` - Basic pages with coming soon
+- `/settings` - Basic page for admin
+- `/master-data` - Basic page for admin
+
+### Cleanup
+- Remove old `Navigation.svelte`
+- Update any remaining references
+
+## Success Criteria
+- [ ] Team Members page migrated
+- [ ] Projects page migrated
+- [ ] Placeholder pages created
+- [ ] Old Navigation removed
+- [ ] All E2E tests pass
+- [ ] No console errors
+
+## Estimated Effort
+4-6 hours
+
+## Dependencies
+- p02-app-layout
+- p03-dashboard-enhancement
+- p04-content-patterns
+
+## Blocks
+- None (final change in UI refactor sequence)