feat(expansion): implement Phase 3 (Town Restoration) and Phase 4 (Cannabis Textiles)

- Added TownSquareScene and linked it with M key transition
- Integrated TownRestorationSystem with material costs and inventory
- Added locked shop items in NPCShopSystem until buildings are restored
- Updated InteractionSystem to handle ruin restoration triggers
- Expanded Cannabis farming to yield Hemp Fiber
- Added Hemp Clothing crafting recipe and procedural icons
- Refactored StatusEffectSystem and NPCShopSystem to global classes

src/systems/FarmingSystem.js

@@ -18,6 +18,13 @@ class FarmingSystem {
                 daysPerStage: 2,
                 sellPrice: 15,
                 seedCost: 8
+            },
+            'cannabis': {
+                name: 'Cannabis',
+                growthStages: 4,
+                daysPerStage: 2,
+                sellPrice: 60,
+                seedCost: 20
             }
         };
     }
@@ -154,16 +161,18 @@ class FarmingSystem {
         // Determine texture based on stage
         let textureKey = `crop_${crop.type}_stage_${crop.stage}`;
 
-        // Fallback textures
-        if (!this.scene.textures.exists(textureKey)) {
-            textureKey = 'carrots_stages'; // Use carrot stages as fallback
-        }
-
         if (this.scene.textures.exists(textureKey)) {
             crop.sprite = this.scene.add.sprite(screenPos.x, screenPos.y, textureKey);
             crop.sprite.setOrigin(0.5, 1);
             crop.sprite.setScale(0.8);
             crop.sprite.setDepth(this.scene.iso.getDepth(crop.gridX, crop.gridY));
+
+            // Apply tilts/fallback tints
+            if (textureKey === 'carrots_stages' && crop.type === 'cannabis') {
+                crop.sprite.setTint(0x55ff55); // Green tint for cannabis fallback
+            } else if (crop.type === 'cannabis') {
+                crop.sprite.setTint(0x88ff88); // Subtle green boost for specific texture
+            }
         }
     }
 
@@ -182,7 +191,12 @@ class FarmingSystem {
 
         // Give items
         if (this.scene.inventorySystem) {
-            this.scene.inventorySystem.addItem(crop.type, 1);
+            if (crop.type === 'cannabis') {
+                this.scene.inventorySystem.addItem('cannabis_buds', 2);
+                this.scene.inventorySystem.addItem('hemp_fiber', 3);
+            } else {
+                this.scene.inventorySystem.addItem(crop.type, 1);
+            }
         }
 
         // Give gold