docs(17-03): complete client image URL migration and migration script plan

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.3
 milestone_name: Research & Decision Tools
 status: planning
-stopped_at: Completed 17-02-PLAN.md
-last_updated: "2026-04-05T10:24:04.581Z"
+stopped_at: Completed 17-03-PLAN.md
+last_updated: "2026-04-05T10:29:15.199Z"
 last_activity: 2026-04-03 — v2.0 roadmap created (Phases 14-18)
 progress:
   total_phases: 11
-  completed_phases: 9
+  completed_phases: 10
   total_plans: 28
-  completed_plans: 25
+  completed_plans: 26
   percent: 0
 ---
 
@@ -56,6 +56,7 @@ Key decisions made during v2.0 planning:
 - Single-user SQLite mode diverges at v2.0 boundary
 - [Phase 17]: Private S3 bucket with presigned URLs (1h default), MinIO pinned to quay.io RELEASE.2025-09-07
 - [Phase 17]: Image URL enrichment at route level, not service level, keeping services storage-agnostic
+- [Phase 17]: Use createObjectURL for immediate upload preview, presigned URLs for existing images
 
 ### Pending Todos
 
@@ -68,6 +69,6 @@ None active.
 
 ## Session Continuity
 
-Last session: 2026-04-05T10:24:04.579Z
-Stopped at: Completed 17-02-PLAN.md
+Last session: 2026-04-05T10:29:15.196Z
+Stopped at: Completed 17-03-PLAN.md
 Resume file: None