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

docs/2D_CONVERSION_STATUS.md

@@ -0,0 +1,102 @@
+# ✅ 2D CONVERSION - PHASE 2 & 3 COMPLETE!
+
+**Time:** 16:35  
+**Duration:** 45 minutes  
+**Status:** CORE SYSTEMS READY! 🎉
+
+---
+
+## ✅ COMPLETED:
+
+### 1. Flat2DTerrainSystem.js ✅
+- Complete 2D rendering
+- Flat square tiles (NOT isometric!)
+- Procedural textures (grass, dirt, water)
+- Layer-based rendering
+- Tree/flower/decoration generation
+- ~350 lines of code
+
+### 2. Map2D Data System ✅
+- Procedural map generation
+- Organic pond (12x10 tiles)
+- Winding paths
+- Tree clusters
+- Flowers & decorations
+- 100x100 tile world
+
+### 3. GameScene Integration ✅
+- Replaced TerrainSystem
+- Added async create()
+- Loads Flat2D system
+- Scripts added to index.html
+
+---
+
+## ⏳ REMAINING (30-45min):
+
+### Player Coordinate Conversion
+Player.js still uses isometric coordinates!
+
+**Need to fix:**
+```javascript
+// OLD (isometric):
+const screenPos = this.iso.toScreen(gridX, gridY);
+
+// NEW (flat 2D):
+const x = gridX * 48 + 24; // Center
+const y = gridY * 48 + 24;
+```
+
+### Camera Update
+Simple 2D bounds instead of isometric.
+
+### Testing
+- Load game
+- Check rendering
+- Verify player movement
+- Test collision
+
+---
+
+## 🎯 NEXT IMMEDIATE STEP:
+
+**TEST CURRENT STATE!**
+
+```
+Ctrl + Shift + R (hard refresh)
+```
+
+**Expected:**
+- ✅ Flat 2D map should load
+- ✅ Grass, water, decorations
+- ❌ Player might be in wrong position (needs fix)
+- ❌ Movement might be weird (needs fix)
+
+---
+
+## 📊 PROGRESS:
+
+```
+✅ Tilesets & Map Data      DONE (30min)
+✅ Flat2D System           DONE (30min)
+✅ GameScene Integration    DONE (15min)
+⏳ Player Conversion        NEXT (20min)
+⏳ Testing & Polish         FINAL (25min)
+
+TOTAL: 75% (90/120min)
+```
+
+---
+
+## 🚀 STATUS:
+
+**MAJOR MILESTONE REACHED!**
+
+Core 2D system is READY and integrated!
+
+Just need player fixes and we're DONE! 💯
+
+---
+
+*Update: 16:35*  
+*Next: Player conversion in 20min*