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

WATER_FIX_SCRIPT.js

@@ -0,0 +1,28 @@
+// EMERGENCY WATER FIX SCRIPT
+// Run this in browser console (F12) to force refresh water textures
+
+console.log('🌊 Forcing water texture refresh...');
+
+// 1. Delete all existing water textures
+if (game && game.textures) {
+    const textures = ['water', 'water_frame_0', 'water_frame_1', 'water_frame_2', 'water_frame_3'];
+    textures.forEach(key => {
+        if (game.textures.exists(key)) {
+            game.textures.remove(key);
+            console.log(`🗑️ Deleted texture: ${key}`);
+        }
+    });
+}
+
+// 2. Force reload scene
+if (game && game.scene) {
+    const scene = game.scene.getScene('GameScene');
+    if (scene) {
+        console.log('🔄 Restarting GameScene...');
+        game.scene.stop('GameScene');
+        game.scene.start('GameScene');
+    }
+}
+
+console.log('✅ Water refresh complete! Grid lines should be gone.');
+console.log('💡 If still visible, do HARD REFRESH: Ctrl+Shift+R');