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/InteractionSystem.js

@@ -259,13 +259,10 @@ class InteractionSystem {
             const decor = this.scene.terrainSystem.decorationsMap.get(decorKey);
 
             if (decor && decor.type === 'chest') {
-                // Open chest and spawn loot!
+                // ... chest opening logic
                 console.log('📦 Opening treasure chest!');
-
-                // Random loot
                 const lootTable = ['item_scrap', 'item_chip', 'item_wood', 'item_stone', 'item_bone'];
                 const lootCount = Phaser.Math.Between(2, 4);
-
                 for (let i = 0; i < lootCount; i++) {
                     const randomLoot = Phaser.Utils.Array.GetRandom(lootTable);
                     if (this.scene.lootSystem) {
@@ -274,13 +271,44 @@ class InteractionSystem {
                         this.scene.lootSystem.spawnLoot(gridX + offsetX, gridY + offsetY, randomLoot);
                     }
                 }
-
-                // Remove chest
                 this.scene.terrainSystem.removeDecoration(gridX, gridY);
                 return;
             }
+
+            // RUIN INTERACTION
+            if (decor && decor.type.includes('ruin')) {
+                console.log('🏚️ Interacted with Ruin at', gridX, gridY);
+                if (this.scene.townRestorationSystem) {
+                    // Find a building that matches this location or type
+                    // For now, let's just trigger a generic notification or the first building
+                    const building = this.scene.townRestorationSystem.buildings.get('jakob_shop'); // Demo link
+                    if (building) {
+                        this.scene.events.emit('show-floating-text', {
+                            x: gridX * 48, y: gridY * 48 - 40,
+                            text: `Restore ${building.name}?`,
+                            color: '#FFD700'
+                        });
+
+                        // Try start restoration if resources exist
+                        if (this.scene.townRestorationSystem.hasMaterials(building.materials)) {
+                            this.scene.townRestorationSystem.startRestoration(building.id);
+                        } else {
+                            const ui = this.scene.scene.get('UIScene');
+                            if (ui && ui.showNotification) {
+                                ui.showNotification({
+                                    title: 'Missing Materials',
+                                    text: `Need Wood: ${building.materials.wood}, Stone: ${building.materials.stone}`,
+                                    icon: '📦'
+                                });
+                            }
+                        }
+                    }
+                }
+                return;
+            }
         }
 
+
         // 4. Try Planting Tree (Manual Planting)
         if (!isAttack && (activeTool === 'tree_sapling' || activeTool === 'item_sapling')) {
             const tile = this.scene.terrainSystem.getTile(gridX, gridY);