refactor: move ellipsis and punctuation into i18n translation strings (#8573)

## Summary

Move ellipsis and punctuation characters into i18n translation strings
for proper internationalization support.

## Changes

- Add 12 new translation keys with punctuation included:
- Placeholder keys with trailing ellipsis (e.g.,
`searchNodesPlaceholder: "Search Nodes..."`)
  - `downloadWithSize` with interpolation: `"Download ({size})"`
  - `completedWithCheckmark`: `"Completed ✓"`
- Prompt keys with colons (e.g., `enterNewNamePrompt: "Enter new
name:"`)
- Update 20 files to use new translation keys instead of string
concatenation

## Review Focus

This eliminates string concatenation patterns like `$t('key') + '...'`
that break proper internationalization, since different languages may
use different punctuation or may not need ellipsis/colons in the same
contexts.

Fixes #7333


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Chores**
* Standardized localization across the app: unified search placeholders
and input hints; updated dialog prompt texts for renaming,
saving/exporting, and related prompts.
* **New Features**
  * Download buttons now show file size via localized text.
  * Completed status displays a localized label with a checkmark.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8573-refactor-move-ellipsis-and-punctuation-into-i18n-translation-strings-2fc6d73d365081828ad3f257bcac7799)
by [Unito](https://www.unito.io)

src/platform/workflow/core/services/workflowActionsService.ts

@@ -55,7 +55,7 @@ export function useWorkflowActionsService() {
       if (settingStore.get('Comfy.PromptFilename')) {
         const input = await dialogService.prompt({
           title: t('workflowService.exportWorkflow'),
-          message: t('workflowService.enterFilename') + ':',
+          message: t('workflowService.enterFilenamePrompt'),
           defaultValue: filename
         })
         // User cancelled the prompt

src/platform/workflow/core/services/workflowService.ts

@@ -35,7 +35,7 @@ export const useWorkflowService = () => {
     if (settingStore.get('Comfy.PromptFilename')) {
       let filename = await dialogService.prompt({
         title: t('workflowService.exportWorkflow'),
-        message: t('workflowService.enterFilename') + ':',
+        message: t('workflowService.enterFilenamePrompt'),
         defaultValue: defaultName
       })
       if (!filename) return null

src/platform/workflow/management/stores/workflowStore.ts

@@ -161,7 +161,7 @@ export class ComfyWorkflow extends UserFile {
   async promptSave(): Promise<string | null> {
     return await useDialogService().prompt({
       title: t('workflowService.saveWorkflow'),
-      message: t('workflowService.enterFilename') + ':',
+      message: t('workflowService.enterFilenamePrompt'),
       defaultValue: this.filename
     })
   }