DOCS: Updated TASKS.md with afternoon session progress - world cleanup + water river system complete

TASKS.md

@@ -573,12 +573,38 @@ Povezava dogodkov z achievementi.
     - [ ] Test offline vs online behavior
 
 ---
-**PROJECT STATUS: RESTORED - 8.DEC VERSION + BUG FIXES** 🚀  
+**PROJECT STATUS: CLEAN WORLD + WATER RIVER SYSTEM** 🚀  
-*Last Updated: 11.12.2025 - 11:40*  
+*Last Updated: 11.12.2025 - 13:00*  
-*Version: 8.DEC.2025 19:00 (Restored with fixes)*  
+*Version: 8.DEC.2025 19:00 (Restored + Clean World + River)*  
-*Next Milestone: Continue from Phase 16 → Integration Testing*
+*Next Milestone: Phase 16 → Integration Testing + Water Animation*
 
-**RECENT FIXES (11.DEC.2025):**
+**RECENT SESSION (11.DEC.2025 - AFTERNOON):**
+- ✅ **WORLD CLEANUP** - Removed ALL unwanted terrain/decorations:
+  - ✅ Disabled elevation-based terrain (no stone/dirt/sand hills)
+  - ✅ Disabled all decorations (trees, rocks, flowers, path stones)
+  - ✅ Disabled city generation (walls, ruins, WALL_EDGE tiles)
+  - ✅ Disabled damaged walls (wall_damaged decorations)
+  - ✅ Disabled signposts (navigation signs)
+  - ✅ Result: **PURE flat grass platform** ✨
+- ✅ **MINECRAFT GRASS BLOCKS** - Proper 3D voxel appearance:
+  - ✅ Top face: Green grass (#44aa44)
+  - ✅ Side faces: Brown dirt (#8B4513, #6B3410)
+  - ✅ Tile size: 48x48 (tileHeight: 48, depth: 20)
+  - ✅ 100x100 platform centered at (50,50)
+  - ✅ Light grey background (#c8c8c8)
+- ✅ **WATER RIVER SYSTEM** - Animated isometric water:
+  - ✅ Sinusoidal river path (natural winding)
+  - ✅ 4 water animation frames generated
+  - ✅ Cyan surface (#33ccff) + dark blue cliffs (#0066aa, #004488)
+  - ✅ Sparkle points + wave patterns
+  - ⏳ Animation update loop (prepared, needs debugging)
+- ✅ **BUG FIXES**:
+  - ✅ Null checks for farm/roads initialization
+  - ✅ Fixed TerrainSystem.update() call in GameScene
+  - ✅ Fixed water tile texture initialization (water_frame_0)
+- ✅ **GIT COMMITS**: 7+ commits with all changes safely saved
+
+**PREVIOUS SESSION (11.DEC.2025 - MORNING):**
 - ✅ Fixed FARM_SIZE (8 → 100) - Large green platform
 - ✅ Fixed FARM_CENTER (20,20 → 50,50) - Centered map  
 - ✅ Fixed Background color (#1a1a2e → #c8c8c8) - Light grey bg