feat: Complete 2D Visual Overhaul - Isometric to Flat Top-Down

- NEW: Flat2DTerrainSystem.js (375 lines)
- NEW: map2d_data.js procedural map (221 lines)
- MODIFIED: GameScene async create, 2D terrain integration
- MODIFIED: Player.js flat 2D positioning
- MODIFIED: game.js disabled pixelArt for smooth rendering
- FIXED: 15+ bugs (updateCulling, isometric conversions, grid lines)
- ADDED: Phase 28 to TASKS.md
- DOCS: DNEVNIK.md session summary

Result: Working flat 2D game with Stardew Valley style!
Time: 5.5 hours

TASKS.md

@@ -1,5 +1,47 @@
 # 🗺️ Task Map & Roadmap - NovaFarma
 
+## ✅ **PHASE 28: 2D VISUAL OVERHAUL** (14.12.2025 - COMPLETED!)
+
+Complete conversion from isometric to flat 2D top-down view.
+
+- [x] **2D Terrain System**
+    - [x] Flat2DTerrainSystem.js (375 lines)
+    - [x] Flat square tiles (NOT isometric diamonds!)
+    - [x] Layer-based rendering (ground, paths, decorations)
+    - [x] Procedural texture generation
+    - [x] Vibrant colors (green grass, brown dirt, blue water)
+- [x] **Map Generation**
+    - [x] map2d_data.js (221 lines)
+    - [x] Procedural map creation (100x100 tiles)
+    - [x] Clean minimal design
+    - [x] Organic pond with lily pads
+    - [x] Tree clusters, flowers
+- [x] **Integration & Fixes**
+    - [x] GameScene.js - async create(), 2D terrain init
+    - [x] Player.js - flat 2D positioning (no isometric)
+    - [x] Camera - 2D bounds, player following
+    - [x] Fixed all isometric conversions (4 locations)
+    - [x] Disabled pixelArt mode for smooth rendering
+- [x] **Bug Fixes (15+)**
+    - [x] updateCulling not found
+    - [x] Cloud sprite undefined
+    - [x] Isometric toGrid calls (4x)
+    - [x] getTile array checks
+    - [x] Grid lines removed
+    - [x] Map simplified (reduced chaos)
+- [x] **Visual Enhancements**
+    - [x] Custom tile textures (grass, dirt, water)
+    - [x] Natural variations (darker/lighter spots)
+    - [x] Smooth antialiased rendering
+    - [x] Professional Stardew Valley style
+
+**Status:** ✅ COMPLETE - Working flat 2D game!  
+**Files Created:** 2 systems (~600 lines)  
+**Files Modified:** 5+ files  
+**Time:** 5.5 hours
+
+---
+
 ## ✅ **PHASE 27: CAMERA SYSTEM** (12.12.2025 - COMPLETED!)
 
 Implementacija camera sistema za trailer, screenshots in marketing.