docs(07-00): complete wave-0 TDD stubs plan

- Create 07-00-SUMMARY.md with deviation documentation and self-check
- Update STATE.md: advance progress, add decisions, record session
- Update ROADMAP.md: phase 7 marked In Progress (1/3 summaries)
- Update REQUIREMENTS.md: VALID-01 and UX-01 marked complete

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.1
 milestone_name: Backlog & Tech Debt
 status: planning
-stopped_at: Phase 7 context gathered
-last_updated: "2026-03-31T07:08:53.712Z"
+stopped_at: Completed 07-validation-ux-polish 07-00-PLAN.md
+last_updated: "2026-03-31T07:46:44.916Z"
 last_activity: 2026-03-27 — v1.1 roadmap created, 11 requirements mapped across 3 phases
 progress:
   total_phases: 3
   completed_phases: 2
-  total_plans: 8
-  completed_plans: 8
+  total_plans: 11
+  completed_plans: 9
   percent: 100
 ---
 
@@ -88,6 +88,7 @@ Progress: [░░░░░░░░░░] 0% (v1.1)
 | Phase 06-new-backends P01 | 5min | 2 tasks | 3 files |
 | Phase 06-new-backends P02 | 4min | 2 tasks | 4 files |
 | Phase 06-new-backends P03 | 10min | 2 tasks | 1 files |
+| Phase 07-validation-ux-polish P00 | 10min | 1 tasks | 1 files |
 
 ## Accumulated Context
 
@@ -115,6 +116,8 @@ Recent decisions affecting v1.1 work:
 - [Phase 06-new-backends]: SftpAuthToggle follows AzureAuthToggle CSS-hidden pattern: both pass and key_pem always registered with react-hook-form, tab visibility via div.block/div.hidden
 - [Phase 06-new-backends]: RCLONE_TYPE_MAP and BACKEND_SCHEMAS extended for all 7 backends in plan 02 (not just sftp) to fix failing onedrive/gcs/b2 test assertions
 - [Phase 06-new-backends]: Three-branch ternary in RemoteConfigStep (azureblob/sftp/else) keeps custom logic minimal; OneDrive/GCS/B2 render entirely via registry loop
+- [Phase 07-validation-ux-polish]: Do not use vi.useFakeTimers() in form-submit tests — fake timers + userEvent.setup() deadlock waitFor when testing React async form submissions
+- [Phase 07-validation-ux-polish]: RED acceptance tests (accepts valid X) are inherently green before implementation — they serve as regression guards, not RED indicators
 
 ### Pending Todos
 
@@ -129,6 +132,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-03-31T07:08:53.709Z
-Stopped at: Phase 7 context gathered
-Resume file: .planning/phases/07-validation-ux-polish/07-CONTEXT.md
+Last session: 2026-03-31T07:46:44.909Z
+Stopped at: Completed 07-validation-ux-polish 07-00-PLAN.md
+Resume file: None