feat(import): add import-only option for recipes without downloading missing LoRAs

Add dual-button design in recipe import flow:
- Details step: [Import Recipe Only] [Import & Download]
- Location step: [Back] [Import & Download] (removed redundant Import Only)

Changes:
- templates/components/import_modal.html: Add secondary button for import-only
- static/js/managers/ImportManager.js: Add saveRecipeOnlyFromDetails() method
- static/js/managers/import/RecipeDataManager.js: Update button state management
- static/js/managers/import/DownloadManager.js: Support skipDownload flag
- locales/*.json: Complete all translation TODOs

Closes #868

locales/zh-CN.json

@@ -645,6 +645,8 @@
                 "root": "根目录",
                 "browseFolders": "浏览文件夹：",
                 "downloadAndSaveRecipe": "下载并保存配方",
+                "importRecipeOnly": "仅导入配方",
+                "importAndDownload": "导入并下载",
                 "downloadMissingLoras": "下载缺失的 LoRA",
                 "saveRecipe": "保存配方",
                 "loraCountInfo": "({existing}/{total} in library)",
@@ -734,55 +736,55 @@
         "batchImport": {
             "title": "批量导入配方",
             "action": "批量导入",
-            "urlList": "[TODO: Translate] URL List",
-            "directory": "[TODO: Translate] Directory",
-            "urlDescription": "[TODO: Translate] Enter image URLs or local file paths (one per line). Each will be imported as a recipe.",
+            "urlList": "URL 列表",
+            "directory": "目录",
+            "urlDescription": "输入图像 URL 或本地文件路径（每行一个）。每个都将作为配方导入。",
             "directoryDescription": "输入目录路径以导入该文件夹中的所有图片。",
             "urlsLabel": "图片 URL 或本地路径",
             "urlsPlaceholder": "https://civitai.com/images/...\nhttps://civitai.com/images/...\nC:/path/to/image.png\n...",
-            "urlsHint": "[TODO: Translate] Enter one URL or path per line",
-            "directoryPath": "[TODO: Translate] Directory Path",
+            "urlsHint": "每行输入一个 URL 或路径",
+            "directoryPath": "目录路径",
             "directoryPlaceholder": "/图片/文件夹/路径",
-            "browse": "[TODO: Translate] Browse",
-            "recursive": "[TODO: Translate] Include subdirectories",
+            "browse": "浏览",
+            "recursive": "包含子目录",
             "tagsOptional": "标签（可选，应用于所有配方）",
-            "tagsPlaceholder": "[TODO: Translate] Enter tags separated by commas",
-            "tagsHint": "[TODO: Translate] Tags will be added to all imported recipes",
+            "tagsPlaceholder": "输入以逗号分隔的标签",
+            "tagsHint": "标签将被添加到所有导入的配方中",
             "skipNoMetadata": "跳过无元数据的图片",
             "skipNoMetadataHelp": "没有 LoRA 元数据的图片将自动跳过。",
-            "start": "[TODO: Translate] Start Import",
+            "start": "开始导入",
             "startImport": "开始导入",
             "importing": "正在导入配方...",
             "progress": "进度",
-            "total": "[TODO: Translate] Total",
-            "success": "[TODO: Translate] Success",
-            "failed": "[TODO: Translate] Failed",
-            "skipped": "[TODO: Translate] Skipped",
-            "current": "[TODO: Translate] Current",
+            "total": "总计",
+            "success": "成功",
+            "failed": "失败",
+            "skipped": "跳过",
+            "current": "当前",
             "currentItem": "当前",
             "preparing": "准备中...",
-            "cancel": "[TODO: Translate] Cancel",
+            "cancel": "取消",
             "cancelImport": "取消",
             "cancelled": "批量导入已取消",
             "completed": "导入完成",
-            "completedWithErrors": "[TODO: Translate] Completed with errors",
+            "completedWithErrors": "导入完成但有错误",
             "completedSuccess": "成功导入 {count} 个配方",
             "successCount": "成功",
             "failedCount": "失败",
             "skippedCount": "跳过",
             "totalProcessed": "总计处理",
-            "viewDetails": "[TODO: Translate] View Details",
-            "newImport": "[TODO: Translate] New Import",
-            "manualPathEntry": "[TODO: Translate] Please enter the directory path manually. File browser is not available in this browser.",
-            "batchImportDirectorySelected": "[TODO: Translate] Directory selected: {name}. You may need to enter the full path manually.",
-            "batchImportManualEntryRequired": "[TODO: Translate] File browser not available. Please enter the directory path manually.",
-            "backToParent": "[TODO: Translate] Back to parent directory",
-            "folders": "[TODO: Translate] Folders",
-            "folderCount": "[TODO: Translate] {count} folders",
-            "imageFiles": "[TODO: Translate] Image Files",
-            "images": "[TODO: Translate] images",
-            "imageCount": "[TODO: Translate] {count} images",
-            "selectFolder": "[TODO: Translate] Select This Folder",
+            "viewDetails": "查看详情",
+            "newImport": "新建导入",
+            "manualPathEntry": "请手动输入目录路径。此浏览器中文件浏览器不可用。",
+            "batchImportDirectorySelected": "已选择目录：{path}",
+            "batchImportManualEntryRequired": "文件浏览器不可用。请手动输入目录路径。",
+            "backToParent": "返回上级目录",
+            "folders": "文件夹",
+            "folderCount": "{count} 个文件夹",
+            "imageFiles": "图像文件",
+            "images": "图像",
+            "imageCount": "{count} 个图像",
+            "selectFolder": "选择此文件夹",
             "errors": {
                 "enterUrls": "请至少输入一个 URL 或路径",
                 "enterDirectory": "请输入目录路径",
@@ -1495,16 +1497,17 @@
             "processingError": "处理出错：{message}",
             "folderBrowserError": "加载文件夹浏览器出错：{message}",
             "recipeSaveFailed": "保存配方失败：{error}",
+            "recipeSaved": "配方保存成功",
             "importFailed": "导入失败：{message}",
             "folderTreeFailed": "加载文件夹树失败",
             "folderTreeError": "加载文件夹树出错",
-            "batchImportFailed": "[TODO: Translate] Failed to start batch import: {message}",
-            "batchImportCancelling": "[TODO: Translate] Cancelling batch import...",
-            "batchImportCancelFailed": "[TODO: Translate] Failed to cancel batch import: {message}",
-            "batchImportNoUrls": "[TODO: Translate] Please enter at least one URL or file path",
-            "batchImportNoDirectory": "[TODO: Translate] Please enter a directory path",
-            "batchImportBrowseFailed": "[TODO: Translate] Failed to browse directory: {message}",
-            "batchImportDirectorySelected": "[TODO: Translate] Directory selected: {path}"
+            "batchImportFailed": "启动批量导入失败：{message}",
+            "batchImportCancelling": "正在取消批量导入...",
+            "batchImportCancelFailed": "取消批量导入失败：{message}",
+            "batchImportNoUrls": "请输入至少一个 URL 或文件路径",
+            "batchImportNoDirectory": "请输入目录路径",
+            "batchImportBrowseFailed": "浏览目录失败：{message}",
+            "batchImportDirectorySelected": "已选择目录：{path}"
         },
         "models": {
             "noModelsSelected": "未选中模型",