docs(05-02): complete multi-forest navigation plan

- SUMMARY.md: navigation handlers, page persistence, fade animation, reward flow
- STATE.md: advance to ready_for_verification, 100% progress, decisions logged
- ROADMAP.md: Phase 05 marked complete (2/2 plans done)

.planning/ROADMAP.md

@@ -109,11 +109,11 @@ Plans:
   2. Pfeiltasten navigieren zwischen Waldseiten mit sanfter Fade-Animation
   3. Die aktuelle Waldseite wird in Progress gespeichert und nach Browser-Reload wiederhergestellt
   4. Nach Lesson-Abschluss zeigt der Wald automatisch die Seite mit dem neuen Element
-**Plans:** 1/2 plans executed
+**Plans:** 2/2 plans complete
 
 Plans:
 - [x] 05-01-PLAN.md — Progress type extension, paginated renderForestScene, navigation DOM and CSS
-- [ ] 05-02-PLAN.md — Navigation handlers, page persistence, reward flow fix, human verification
+- [x] 05-02-PLAN.md — Navigation handlers, page persistence, reward flow fix, human verification
 
 ## Progress
 
@@ -126,4 +126,4 @@ Phases execute in numeric order: 1 → 2 → 3 → 4 → 5
 | 2. Gemini-Integration + Asset-Pipeline | 5/5 | Complete | - |
 | 3. Komplettes Spielerlebnis | 5/5 | Complete | - |
 | 4. Polish + Audio | 4/4 | Complete | - |
-| 5. Multi-Wald-System | 1/2 | In Progress|  |
+| 5. Multi-Wald-System | 2/2 | Complete   | 2026-03-29 |

.planning/STATE.md

@@ -2,15 +2,15 @@
 gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
-status: executing
+status: verifying
-stopped_at: Completed 05-01-PLAN.md
+stopped_at: Completed 05-02-PLAN.md
-last_updated: "2026-03-29T21:00:12.800Z"
+last_updated: "2026-03-29T21:04:00.840Z"
 last_activity: 2026-03-29
 progress:
   total_phases: 5
-  completed_phases: 4
+  completed_phases: 5
   total_plans: 21
-  completed_plans: 20
+  completed_plans: 21
   percent: 0
 ---
 
@@ -27,7 +27,7 @@ See: .planning/PROJECT.md (updated 2026-03-29)
 
 Phase: 05 (multi-wald-system-wald-pagination-und-navigation-zwischen-w-ldern) — EXECUTING
 Plan: 2 of 2
-Status: Ready to execute
+Status: Phase complete — ready for verification
 Last activity: 2026-03-29
 
 Progress: [░░░░░░░░░░] 0%
@@ -72,6 +72,7 @@ Progress: [░░░░░░░░░░] 0%
 | Phase 04 P01 | 4min | 2 tasks | 9 files |
 | Phase 04 P04 | 1min | 2 tasks | 4 files |
 | Phase 05 P01 | 2min | 2 tasks | 7 files |
+| Phase 05 P02 | 2min | 2 tasks | 3 files |
 
 ## Accumulated Context
 
@@ -114,6 +115,9 @@ Recent decisions affecting current work:
 - [Phase 04]: Audio calls are fire-and-forget at all touch points -- sound/speech modules handle settings checks and errors internally
 - [Phase 05]: renderForestScene owns nav UI update: called after element rendering with totalPages from full element array
 - [Phase 05]: SLOTS_PER_PAGE exported as named constant so Plan 02 can import without duplication
+- [Phase 05]: navigateToPage in initForestScreen reads fresh progress before saving to avoid stale data on navigation
+- [Phase 05]: Zurueck zum Wald computes newPage from elements.length before initForestScreen to always target correct last page
+- [Phase 05]: Fade animation uses grid.style.opacity toggle with requestAnimationFrame for natural transition
 
 ### Pending Todos
 
@@ -142,6 +146,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-03-29T21:00:12.792Z
+Last session: 2026-03-29T21:04:00.833Z
-Stopped at: Completed 05-01-PLAN.md
+Stopped at: Completed 05-02-PLAN.md
 Resume file: None

.planning/phases/05-multi-wald-system-wald-pagination-und-navigation-zwischen-w-ldern/05-02-SUMMARY.md

@@ -0,0 +1,117 @@
+---
+phase: 05-multi-wald-system-wald-pagination-und-navigation-zwischen-w-ldern
+plan: 02
+subsystem: ui
+tags: [forest, pagination, navigation, indexeddb, animation]
+
+# Dependency graph
+requires:
+  - phase: 05-01
+    provides: renderForestScene with page param, SLOTS_PER_PAGE constant, currentForestPage in Progress
+
+provides:
+  - Arrow navigation between forest pages (prev/next buttons wired in initForestScreen)
+  - currentForestPage persisted to IndexedDB on every navigation
+  - Fade-out/fade-in opacity transition on page change
+  - Post-lesson "Zurück zum Wald" navigates to page containing new element
+  - slotIndex in reward.ts uses SLOTS_PER_PAGE constant (no more hardcoded 12)
+
+affects:
+  - forest navigation flow
+  - reward screen back-to-forest flow
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - navigateToPage closure captures currentPage in initForestScreen for correct button wiring
+    - saveProgress called with fresh getProgress read to avoid stale data on navigation
+
+key-files:
+  created: []
+  modified:
+    - src/forest/scene.ts
+    - src/forest/reward.ts
+    - src/app.ts
+
+key-decisions:
+  - "navigateToPage in initForestScreen reads fresh progress before saving to avoid overwriting concurrent changes"
+  - "Zurück zum Wald computes newPage from elements.length before initForestScreen to control which page is shown"
+  - "Fade animation uses grid.style.opacity toggle with requestAnimationFrame for natural transition"
+
+patterns-established:
+  - "Pattern: Page persistence reads fresh progress (getProgress) rather than mutating stale reference"
+
+requirements-completed: [MWLD-05, MWLD-06, MWLD-07]
+
+# Metrics
+duration: 2min
+completed: 2026-03-29
+---
+
+# Phase 05 Plan 02: Multi-Wald Navigation Summary
+
+**Arrow navigation between forest pages with IndexedDB persistence, fade animation, and correct post-lesson page targeting**
+
+## Performance
+
+- **Duration:** 2 min
+- **Started:** 2026-03-29T21:01:24Z
+- **Completed:** 2026-03-29T21:03:30Z
+- **Tasks:** 2 (+ 1 auto-approved checkpoint)
+- **Files modified:** 3
+
+## Accomplishments
+
+- Wired prev/next navigation buttons in `initForestScreen` with closure over `currentPage`
+- Persists `currentForestPage` to IndexedDB on every page navigation via `saveProgress`
+- Added 0.3s opacity fade-out/fade-in transition to `renderForestScene` for smooth page changes
+- "Zurück zum Wald" after lesson now computes last page from element count and updates progress before `initForestScreen`
+- Replaced hardcoded `% 12` in `reward.ts` slot calculation with `% SLOTS_PER_PAGE` import
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Wire navigation handlers and page persistence in initForestScreen** - `13b8df5` (feat)
+2. **Task 2: Fix reward flow and all renderForestScene call sites for pagination** - `8f88843` (feat)
+3. **Task 3: Verify multi-forest navigation** - auto-approved checkpoint (--auto mode)
+
+## Files Created/Modified
+
+- `src/forest/scene.ts` - Added `saveProgress` import, navigation button handlers with `navigateToPage` closure, fade animation
+- `src/forest/reward.ts` - Imported `SLOTS_PER_PAGE` from `./scene`, replaced `% 12` with `% SLOTS_PER_PAGE`
+- `src/app.ts` - Imported `SLOTS_PER_PAGE` and `getForestElements`; updated Zurück-zum-Wald callback to navigate to element's page
+
+## Decisions Made
+
+- `navigateToPage` reads fresh progress before saving to avoid overwriting data changed by other parts of the app during navigation
+- The "Zurück zum Wald" callback computes `newPage` from `elements.length` after the new element is already saved, so it always resolves to the correct last page
+- `initForestScreen` is called after setting `currentForestPage` in progress so the nav renders correctly from the start
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None.
+
+## Next Phase Readiness
+
+- Multi-Wald navigation complete. Phase 05 is fully done.
+- Forest pagination is interactive, persistent, and animated.
+- No blockers.
+
+## Self-Check: PASSED
+
+- src/forest/scene.ts: FOUND
+- src/forest/reward.ts: FOUND
+- src/app.ts: FOUND
+- 05-02-SUMMARY.md: FOUND
+- Commit 13b8df5: FOUND
+- Commit 8f88843: FOUND
+
+---
+*Phase: 05-multi-wald-system-wald-pagination-und-navigation-zwischen-w-ldern*
+*Completed: 2026-03-29*