docs(03-04): complete RemoteConfigStep plan

- SUMMARY.md created with TDD commits, deviations, decisions
- STATE.md updated: progress 92%, decisions, session
- ROADMAP.md updated: phase 3 4/5 summaries complete

.planning/STATE.md

@@ -3,14 +3,14 @@ gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
 status: executing
-stopped_at: Completed 03-wizard-ui-03-03-PLAN.md
-last_updated: "2026-03-27T08:34:43.350Z"
+stopped_at: Completed 03-wizard-ui-03-04-PLAN.md
+last_updated: "2026-03-27T08:40:02.289Z"
 last_activity: 2026-03-26 — Completed plan 01-02 (Backend Schema Registry)
 progress:
   total_phases: 4
   completed_phases: 2
   total_plans: 13
-  completed_plans: 11
+  completed_plans: 12
   percent: 50
 ---
 
@@ -58,6 +58,7 @@ Progress: [█████░░░░░] 50%
 | Phase 03-wizard-ui P01 | 1min | 2 tasks | 5 files |
 | Phase 03-wizard-ui P02 | 2min | 2 tasks | 4 files |
 | Phase 03-wizard-ui P03 | 2min | 1 tasks | 2 files |
+| Phase 03-wizard-ui P04 | 3min | 1 tasks | 3 files |
 
 ## Accumulated Context
 
@@ -96,6 +97,8 @@ Recent decisions affecting current work:
 - [Phase 03-wizard-ui]: [03-03] waitFor used in async validation tests — handleSubmit is async, React state updates need await
 - [Phase 03-wizard-ui]: [03-03] pendingBackend useRef stores clicked backend type before handleSubmit fires — avoids closure staleness
 - [Phase 03-wizard-ui]: [03-03] Dispatch order: SET_REMOTE_NAME -> SET_BACKEND_TYPE -> SET_REMOTE_PARAMS({}) -> SET_STEP(1)
+- [Phase 03-wizard-ui]: [03-04] useEffect guard for null backendType instead of dispatch-in-render — prevents React hooks order violation
+- [Phase 03-wizard-ui]: [03-04] Fallback schema (azureblob) used when backendType is null to keep useForm call unconditional
 
 ### Pending Todos
 
@@ -109,6 +112,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-03-27T08:34:43.347Z
-Stopped at: Completed 03-wizard-ui-03-03-PLAN.md
+Last session: 2026-03-27T08:40:02.286Z
+Stopped at: Completed 03-wizard-ui-03-04-PLAN.md
 Resume file: None