refactor: 完成多语言国际化全量替换与补充

1. 新增大量中英文语言包文件，覆盖自定义组件、页面、工具类的文案
2. 替换硬编码文本为多语言调用，统一全局文案管理
3. 优化语言包结构，拆分公共模块与业务模块
4. 修复部分语言加载与国际化适配问题

lang/en-us/seal/medium/detail.js

@@ -1,17 +1,27 @@
 export const lang = {
-	// page title
-	title: 'Search Results',
 
-	// action buttons
-	exportImage: 'Export Image',
-	exportPdf: 'Export PDF',
+	// Seal detail
+	seal: {
+		medium: {
+			detail: {
+				// Page title
+				title: 'Seal Details',
+				// Export image
+				exportImage: 'Export Image',
+				// Export PDF
+				exportPdf: 'Export PDF',
+				// Loading
+				loading: 'Loading',
+				// File does not exist
+				fileNotExist: 'File does not exist',
+				// Save success
+				saveSuccess: 'Saved successfully',
+				// Save failed
+				saveFailed: 'Save failed',
+				// Download failed
+				downloadFailed: 'Download failed',
+			}
+		}
+	}
 
-	// loading tips
-	loading: 'Loading',
-
-	// toast messages
-	fileNotExist: 'File does not exist',
-	saveSuccess: 'Saved successfully',
-	saveFailed: 'Save failed, please try again later',
-	downloadFailed: 'Download failed',
 }