docs(12-04): complete setup-wizard PWA plan — BUG 1+2 fixed, playwright verified

Update SUMMARY.md with bug fix details, TDD gate compliance, and playwright-cli
verification confirming /api/setup/config returns 200 with camelCase payload.
Update STATE.md session info. Phase 12 all 4 plans complete.

.planning/STATE.md

@@ -3,8 +3,8 @@ gsd_state_version: 1.0
 milestone: v1.1
 milestone_name: Operability & Polish
 status: verifying
-stopped_at: Phase 12 Plan 03 complete — first-login-claims implemented; plan 4 of 4 is next
-last_updated: "2026-06-15T18:35:51.373Z"
+stopped_at: Phase 12 Plan 04 Tasks 1-3 complete — paused at Task 4 human-verify checkpoint (Docker rebuild + fresh-DB e2e verification needed)
+last_updated: "2026-06-15T18:51:36.012Z"
 last_activity: 2026-06-15
 progress:
   total_phases: 24
@@ -264,7 +264,7 @@ Recent decisions affecting current work:
 
 ## Session Continuity
 
-Last session: 2026-06-15T18:35:51.354Z
+Last session: 2026-06-15T18:51:35.993Z
 Stopped at: Phase 12 Plan 04 Tasks 1-3 complete — paused at Task 4 human-verify checkpoint (Docker rebuild + fresh-DB e2e verification needed)
 Resume file: None