[FEAT] 實作機台廣告管理模組與多語系支援

1. 新增廣告管理列表與機台配置介面，包含多語系 (zh_TW, en, ja) 與完整 CRUD
2. 實作基於 Alpine 的廣告素材預覽輪播功能
3. 優化廣告素材下拉選單，強制綁定所屬公司以達成多租戶資料隔離
4. 重構廣告配置中廣告影片的縮圖渲染邏輯，移除 <video> 標籤以大幅提升頁面載入速度與節省頻寬
5. 放寬個人檔案頭像上傳限制，支援 WebP 格式

lang/en.json

@@ -800,5 +800,72 @@
     "user": "一般用戶",
     "vs Yesterday": "vs Yesterday",
     "warehouses": "Warehouse Management",
-    "待填寫": "Pending"
+    "待填寫": "Pending",
+    "Advertisement List": "Advertisement List",
+    "Machine Advertisement Settings": "Machine Advertisement Settings",
+    "Add Advertisement": "Add Advertisement",
+    "Edit Advertisement": "Edit Advertisement",
+    "Delete Advertisement": "Delete Advertisement",
+    "Duration": "Duration",
+    "15 Seconds": "15 Seconds",
+    "30 Seconds": "30 Seconds",
+    "60 Seconds": "60 Seconds",
+    "Position": "Position",
+    "Standby Ad": "Standby Ad",
+    "Assign Advertisement": "Assign Advertisement",
+    "Please select a machine first": "Please select a machine first",
+    "Advertisement created successfully": "Ad created successfully",
+    "Advertisement updated successfully": "Ad updated successfully",
+    "Advertisement deleted successfully": "Ad deleted successfully",
+    "Advertisement assigned successfully": "Ad assigned successfully",
+    "Vending": "Vending",
+    "Visit Gift": "Visit Gift",
+    "Standby": "Standby",
+    "Advertisement Video/Image": "Ad Video/Image",
+    "Sort Order": "Sort Order",
+    "Date Range": "Date Range",
+    "Manage ad materials and machine playback settings": "Manage ad materials and machine playback settings",
+    "Preview": "Preview",
+    "No advertisements found.": "No advertisements found.",
+    "vending": "Vending Page",
+    "visit_gift": "Visit Gift",
+    "standby": "Standby AD",
+    "No assignments": "No assignments",
+    "Please select a machine to view and manage its advertisements.": "Please select a machine to view and manage its advertisements.",
+    "Delete Advertisement Confirmation": "Delete Advertisement Confirmation",
+    "Are you sure you want to delete this advertisement? This will also remove all assignments to machines.": "Are you sure you want to delete this advertisement? This will also remove all assignments to machines.",
+    "Manage your ad material details": "Manage your ad material details",
+    "Material Name": "Material Name",
+    "Enter ad material name": "Enter ad material name",
+    "Material Type": "Material Type",
+    "Duration (Seconds)": "Duration (Seconds)",
+    "Seconds": "Seconds",
+    "Upload Image": "Upload Image",
+    "Upload Video": "Upload Video",
+    "Active Status": "Active Status",
+    "Save Material": "Save Material",
+    "Select a material to play on this machine": "Select a material to play on this machine",
+    "Target Position": "Target Position",
+    "Select Material": "Select Material",
+    "Please select a material": "Please select a material",
+    "Playback Order": "Playback Order",
+    "Smallest number plays first.": "Smallest number plays first.",
+    "Confirm Assignment": "Confirm Assignment",
+    "Are you sure you want to remove this assignment?": "Are you sure you want to remove this assignment?",
+    "image": "Image",
+    "video": "Video",
+    "Search Machine...": "Search Machine...",
+    "Advertisement created successfully.": "Advertisement created successfully.",
+    "Advertisement updated successfully.": "Advertisement updated successfully.",
+    "Advertisement deleted successfully.": "Advertisement deleted successfully.",
+    "Cannot delete advertisement being used by machines.": "Cannot delete advertisement being used by machines.",
+    "Advertisement assigned successfully.": "Advertisement assigned successfully.",
+    "Assignment removed successfully.": "Assignment removed successfully.",
+    "Max 5MB": "Max 5MB",
+    "Max 50MB": "Max 50MB",
+    "Select...": "Select...",
+    "Ad Settings": "Ad Settings",
+    "System Default (All Companies)": "System Default (All Companies)",
+    "No materials available": "No materials available",
+    "Search...": "Search..."
 }