docs(03-01): complete data layer foundation plan

- SUMMARY.md with execution results
- STATE.md updated with position and decisions
- ROADMAP.md updated with plan progress

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 03-03-PLAN.md
-last_updated: "2026-03-29T11:42:33.082Z"
+stopped_at: Completed 03-01-PLAN.md
+last_updated: "2026-03-29T11:43:32.896Z"
 last_activity: 2026-03-29
 progress:
   total_phases: 4
   completed_phases: 2
   total_plans: 15
-  completed_plans: 11
+  completed_plans: 12
   percent: 0
 ---
 
@@ -26,7 +26,7 @@ See: .planning/PROJECT.md (updated 2026-03-29)
 ## Current Position
 
 Phase: 03 (komplettes-spielerlebnis) — EXECUTING
-Plan: 2 of 5
+Plan: 3 of 5
 Status: Ready to execute
 Last activity: 2026-03-29
 
@@ -63,6 +63,7 @@ Progress: [░░░░░░░░░░] 0%
 | Phase 02 P03 | 6min | 2 tasks | 12 files |
 | Phase 02 P05 | 3min | 3 tasks | 7 files |
 | Phase 03 P03 | 2min | 2 tasks | 3 files |
+| Phase 03 P01 | 3min | 2 tasks | 7 files |
 
 ## Accumulated Context
 
@@ -90,6 +91,8 @@ Recent decisions affecting current work:
 - [Phase 02]: Asset generation script skips existing files for idempotent re-runs
 - [Phase 02]: Vite static imports for avatar PNGs with onerror emoji fallback pattern
 - [Phase 03]: Object URLs tracked in module-level array and revoked on re-render to prevent memory leaks
+- [Phase 03]: Levels 1-2 use letter combos (no real German words with F/J/D/K only)
+- [Phase 03]: Rate limits raised to 10 text / 5 image per day for practical usage
 
 ### Pending Todos
 
@@ -101,6 +104,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-03-29T11:42:33.074Z
-Stopped at: Completed 03-03-PLAN.md
+Last session: 2026-03-29T11:43:32.889Z
+Stopped at: Completed 03-01-PLAN.md
 Resume file: None