feat(settings): filename templates for download and bulk rename (#1071)

Add per-model-type filename templates ({model_name}, {version_name},
{base_model}, {author}, {first_tag}, {hash_short}, {original_name}) so
downloaded files get informative names instead of e.g. V1.safetensors.
Empty template keeps the current filename (opt-in, off by default).

- apply template automatically after downloads; rename conflicts keep
  the original name and never fail the download
- record original_file_name in metadata on rename for traceability
- bulk apply via GET|POST /api/lm/{prefix}/apply-filename-template with
  WebSocket progress, sharing the auto-organize lock
- settings UI lives in the new Organization tab with validation, live
  preview, and per-type 'apply to library' actions

locales/zh-CN.json

@@ -681,6 +681,22 @@
                 "validTemplate": "有效模板"
             }
         },
+        "filenameTemplates": {
+            "title": "[TODO: Translate] Filename Templates",
+            "help": "[TODO: Translate] Configure filenames for downloaded models per model type. Leave empty to keep the original filename. The original filename is always preserved in the model's metadata.",
+            "availablePlaceholders": "[TODO: Translate] Available placeholders:",
+            "templatePlaceholder": "[TODO: Translate] Enter filename template (e.g., {base_model}-{model_name}-{version_name})",
+            "applyButton": "[TODO: Translate] Apply to Library Now",
+            "applyHelp": "[TODO: Translate] Renames all existing files of this model type according to the template. Warning: renaming changes the relative path seen by ComfyUI loaders, so existing workflows referencing the old filename may need to be updated. The original filename is preserved in each model's metadata.",
+            "confirmApply": "[TODO: Translate] Rename all existing files of this model type according to the filename template? This changes the relative path seen by ComfyUI loaders. The original filename is preserved in each model's metadata.",
+            "emptyTemplateInfo": "[TODO: Translate] No filename template configured for this model type — original filenames are kept, nothing to apply.",
+            "validation": {
+                "keepOriginal": "[TODO: Translate] Valid (keep original filename)",
+                "invalidChars": "[TODO: Translate] Invalid characters detected (a filename cannot contain / \\ < > : \" | ? *)",
+                "invalidPlaceholder": "[TODO: Translate] Invalid placeholder: {placeholder}",
+                "validTemplate": "[TODO: Translate] Valid template"
+            }
+        },
         "exampleImages": {
             "downloadLocation": "下载位置",
             "downloadLocationPlaceholder": "输入示例图片文件夹路径",
@@ -913,6 +929,14 @@
                 "complete": "自动整理已完成",
                 "error": "错误：{error}"
             },
+            "filenameTemplateProgress": {
+                "initializing": "[TODO: Translate] Initializing filename template apply...",
+                "starting": "[TODO: Translate] Applying filename template to {type}...",
+                "processing": "[TODO: Translate] Processing ({processed}/{total}) - {success} renamed, {skipped} skipped, {failures} failed",
+                "completed": "[TODO: Translate] Completed: {success} renamed, {skipped} skipped, {failures} failed",
+                "complete": "[TODO: Translate] Filename template apply complete",
+                "error": "[TODO: Translate] Error: {error}"
+            },
             "enrichHfAgent": "AI 元数据增强"
         },
         "contextMenu": {
@@ -2311,6 +2335,9 @@
             "autoOrganizeSuccess": "自动整理已成功完成，共 {count} 个 {type}",
             "autoOrganizePartialSuccess": "自动整理完成：已移动 {success} 个，{failures} 个失败，共 {total} 个模型",
             "autoOrganizeFailed": "自动整理失败：{error}",
+            "filenameTemplateSuccess": "[TODO: Translate] Filename template applied successfully for {count} {type}",
+            "filenameTemplatePartialSuccess": "[TODO: Translate] Filename template applied with {success} renamed, {failures} failed out of {total} models",
+            "filenameTemplateFailed": "[TODO: Translate] Applying filename template failed: {error}",
             "noModelsSelected": "未选中模型"
         },
         "recipes": {
@@ -2477,6 +2504,8 @@
             "mappingSaveFailed": "保存基础模型映射失败：{message}",
             "downloadTemplatesUpdated": "下载路径模板已更新",
             "downloadTemplatesFailed": "保存下载路径模板失败：{message}",
+            "filenameTemplatesUpdated": "[TODO: Translate] Filename templates updated",
+            "filenameTemplatesFailed": "[TODO: Translate] Failed to save filename templates: {message}",
             "recipesPathUpdated": "配方存储路径已更新",
             "recipesPathSaveFailed": "更新配方存储路径失败：{message}",
             "settingsUpdated": "设置已更新：{setting}",