docs(19): mark UI-SPEC approved after checker verification

All 6 design dimensions PASS plus Phase 17 brand-slot readiness contract.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.planning/phases/19-local-auth-no-oidc-mode/19-UI-SPEC.md

@@ -1,10 +1,11 @@
 ---
 phase: 19
 slug: local-auth-no-oidc-mode
-status: draft
+status: approved
 shadcn_initialized: false
 preset: none
 created: 2026-06-16
+approved: 2026-06-16
 ---
 
 # Phase 19 — UI Design Contract: Local Auth (No-OIDC Mode)
@@ -675,11 +676,12 @@ new icons needed: `Lock`, `User`, `Eye`, `EyeOff`, `LogIn` — all available in
 
 ## Checker Sign-Off
 
-- [ ] Dimension 1 Copywriting: PASS
-- [ ] Dimension 2 Visuals: PASS
-- [ ] Dimension 3 Color: PASS
-- [ ] Dimension 4 Typography: PASS
-- [ ] Dimension 5 Spacing: PASS
-- [ ] Dimension 6 Registry Safety: PASS
+- [x] Dimension 1 Copywriting: PASS
+- [x] Dimension 2 Visuals: PASS
+- [x] Dimension 3 Color: PASS
+- [x] Dimension 4 Typography: PASS
+- [x] Dimension 5 Spacing: PASS
+- [x] Dimension 6 Registry Safety: PASS
+- [x] Phase 17 Brand-Slot Readiness: PASS
 
-**Approval:** pending
+**Approval:** approved 2026-06-16