docs(12-01): complete Base64ToImageSourceConverter and ClientLogoPreview plan

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v2.2
 milestone_name: Report Branding & User Directory
 status: completed
-stopped_at: Completed 11-03-PLAN.md — ViewModel branding wiring
-last_updated: "2026-04-08T12:56:08.172Z"
+stopped_at: Completed 12-01-PLAN.md
+last_updated: "2026-04-08T13:19:29.504Z"
 last_activity: 2026-04-08 — Phase 11 planning completed
 progress:
   total_phases: 5
   completed_phases: 2
-  total_plans: 7
-  completed_plans: 7
+  total_plans: 10
+  completed_plans: 8
 ---
 
 # Project State
@@ -65,6 +65,7 @@ Decisions are logged in PROJECT.md Key Decisions table.
 - [Phase 11]: Test constructors on 3 ViewModels received optional IBrandingService? brandingService = null as last parameter to preserve all existing test call sites
 - [Phase 11]: Guard clause (if _brandingService is not null) used for graceful degradation — branding = null fallback preserves backward compat
 - [Phase 11]: No App.xaml.cs changes needed for ViewModel branding injection — IBrandingService already registered as singleton, ViewModel registrations auto-resolve
+- [Phase 12]: Skipped BitmapImage creation test due to missing Xunit.StaFact; STA thread required for WPF BitmapImage
 
 ### Pending Todos
 
@@ -79,7 +80,7 @@ None.
 
 ## Session Continuity
 
-Last session: 2026-04-08T12:51:43.351Z
-Stopped at: Completed 11-03-PLAN.md — ViewModel branding wiring
+Last session: 2026-04-08T13:19:29.502Z
+Stopped at: Completed 12-01-PLAN.md
 Resume file: None
 Next step: `/gsd:execute-phase 11`