docs(02-01): complete auth page branding plan

- SUMMARY.md: auth pages branded with gradient bg, wordmark, Alert errors
- STATE.md: advanced progress, added decisions, updated session
- ROADMAP.md: phase 02 plan progress updated (1/2 summaries)
- REQUIREMENTS.md: AUTH-01 through AUTH-04 marked complete

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
 status: planning
-stopped_at: Completed 01-design-token-foundation-01-02-PLAN.md
-last_updated: "2026-03-11T20:28:15.679Z"
+stopped_at: Completed 02-layout-and-brand-identity-02-01-PLAN.md
+last_updated: "2026-03-11T20:50:06.093Z"
 last_activity: 2026-03-11 — Roadmap created from requirements and research
 progress:
   total_phases: 4
   completed_phases: 1
-  total_plans: 2
-  completed_plans: 2
+  total_plans: 4
+  completed_plans: 3
   percent: 0
 ---
 
@@ -52,6 +52,7 @@ Progress: [░░░░░░░░░░] 0%
 *Updated after each plan completion*
 | Phase 01-design-token-foundation P01 | 4 | 3 tasks | 6 files |
 | Phase 01-design-token-foundation P02 | 60 | 3 tasks | 8 files |
+| Phase 02-layout-and-brand-identity P01 | 8 | 2 tasks | 5 files |
 
 ## Accumulated Context
 
@@ -69,6 +70,8 @@ Recent decisions affecting current work:
 - [Phase 01-design-token-foundation]: InlineEditCell wraps TableCell internally — callers own row structure, component owns display/edit state
 - [Phase 01-design-token-foundation]: amountColorClass() is the only allowed way to color amount cells — raw text-green/text-red classes banned in dashboard components
 - [Phase 01-design-token-foundation]: Chart Cell fills use palette[type].base keyed by categoryType — charts and card headers share the same color token
+- [Phase 02-layout-and-brand-identity]: Gradient background uses palette.saving/bill/investment light shades at 135deg for subtle tinted-paper feel on auth screens
+- [Phase 02-layout-and-brand-identity]: Alert destructive replaces plain error <p> — semantic role=alert improves a11y and enables test assertions
 
 ### Pending Todos
 
@@ -81,6 +84,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-03-11T20:19:46.066Z
-Stopped at: Completed 01-design-token-foundation-01-02-PLAN.md
+Last session: 2026-03-11T20:50:06.091Z
+Stopped at: Completed 02-layout-and-brand-identity-02-01-PLAN.md
 Resume file: None