docs(01-02): complete screen management + onboarding plan

- Add 01-02-SUMMARY.md with execution results
- Update STATE.md: plan 3/5, 40% progress, decisions logged
- Update ROADMAP.md with plan progress
- Mark requirements FNDN-05, ONBD-01-04 complete

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: v1.0
 milestone_name: milestone
 status: executing
-stopped_at: Completed 01-01-PLAN.md
-last_updated: "2026-03-29T09:04:30.178Z"
+stopped_at: Completed 01-02-PLAN.md
+last_updated: "2026-03-29T09:07:53.267Z"
 last_activity: 2026-03-29
 progress:
   total_phases: 4
   completed_phases: 0
   total_plans: 5
-  completed_plans: 1
+  completed_plans: 2
   percent: 0
 ---
 
@@ -26,7 +26,7 @@ See: .planning/PROJECT.md (updated 2026-03-29)
 ## Current Position
 
 Phase: 01 (grundger-st-tippmechanik) — EXECUTING
-Plan: 2 of 5
+Plan: 3 of 5
 Status: Ready to execute
 Last activity: 2026-03-29
 
@@ -53,6 +53,7 @@ Progress: [░░░░░░░░░░] 0%
 
 *Updated after each plan completion*
 | Phase 01 P01 | 4min | 2 tasks | 22 files |
+| Phase 01 P02 | 2min | 2 tasks | 6 files |
 
 ## Accumulated Context
 
@@ -65,6 +66,8 @@ Recent decisions affecting current work:
 - All phases: Gemini REST via fetch(), key in public/config.json (private use acceptable)
 - Phase 2+: Vorab-generierte Character Assets per Build-Script (kein Onboarding-Warten)
 - [Phase 01]: openDB accepts optional name param for test isolation with fake-indexeddb
+- [Phase 01]: Screen transitions use CSS opacity+display toggle, no router library
+- [Phase 01]: Companion cards rendered dynamically from data array, not hardcoded HTML
 
 ### Pending Todos
 
@@ -76,6 +79,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-03-29T09:04:30.171Z
-Stopped at: Completed 01-01-PLAN.md
+Last session: 2026-03-29T09:07:53.261Z
+Stopped at: Completed 01-02-PLAN.md
 Resume file: None