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

src/utils/GlobalInventoryHelper.js

@@ -0,0 +1,86 @@
+/**
+ * GLOBAL INVENTORY HELPER
+ * Provides simple object-based inventory access for compatibility
+ * with simple crafting system format
+ * 
+ * Automatically syncs with InventorySystem
+ */
+
+window.inventory = new Proxy({}, {
+    /**
+     * GET - Read inventory count
+     * Usage: inventory.wood → returns wood count
+     */
+    get(target, prop) {
+        if (typeof prop === 'symbol' || prop === 'toJSON' || prop === 'toString') {
+            return target[prop];
+        }
+
+        const gameScene = window.gameState?.gameScene;
+        if (!gameScene || !gameScene.inventorySystem) {
+            console.warn('⚠️ InventorySystem not ready yet');
+            return 0;
+        }
+
+        return gameScene.inventorySystem.getItemCount(prop);
+    },
+
+    /**
+     * SET - Modify inventory count
+     * Usage: inventory.wood = 10 → sets wood to 10
+     * Usage: inventory.wood += 5 → adds 5 wood
+     * Usage: inventory.wood -= 2 → removes 2 wood
+     */
+    set(target, prop, value) {
+        if (typeof prop === 'symbol') {
+            target[prop] = value;
+            return true;
+        }
+
+        const gameScene = window.gameState?.gameScene;
+        if (!gameScene || !gameScene.inventorySystem) {
+            console.warn('⚠️ InventorySystem not ready yet');
+            return false;
+        }
+
+        // Get current count
+        const currentCount = gameScene.inventorySystem.getItemCount(prop);
+        const difference = value - currentCount;
+
+        if (difference > 0) {
+            // Add items
+            gameScene.inventorySystem.addItem(prop, difference);
+        } else if (difference < 0) {
+            // Remove items
+            gameScene.inventorySystem.removeItem(prop, Math.abs(difference));
+        }
+
+        // ✨ AUTO UI UPDATE
+        gameScene.inventorySystem.updateUI();
+
+        return true;
+    }
+});
+
+/**
+ * Global helper function for simple crafting system
+ */
+window.addItemToInventory = function (itemKey, quantity) {
+    const gameScene = window.gameState?.gameScene;
+    if (!gameScene || !gameScene.inventorySystem) {
+        console.warn('⚠️ InventorySystem not ready yet');
+        return false;
+    }
+
+    const result = gameScene.inventorySystem.addItem(itemKey, quantity);
+
+    // ✨ AUTO UI UPDATE
+    gameScene.inventorySystem.updateUI();
+
+    return result;
+};
+
+console.log('✅ Global inventory helper initialized');
+console.log('💡 Usage: inventory.wood, inventory.stone, etc.');
+console.log('💡 Usage: inventory.wood = 10, inventory.wood += 5, etc.');
+console.log('✨ UI auto-updates on inventory change!');