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/locales/en/main.json

@@ -136,7 +136,8 @@
     "searchKeybindings": "Search Keybindings",
     "searchExtensions": "Search Extensions",
     "search": "Search",
-    "searchPlaceholder": "Search...",
+    "searchPlaceholder": "Search {subject}...",
+    "downloadWithSize": "Download ({size})",
     "noResultsFound": "No Results Found",
     "noResults": "No Results",
     "searchFailedMessage": "We couldn't find any settings matching your search. Try adjusting your search terms.",
@@ -152,6 +153,8 @@
     "custom": "Custom",
     "command": "Command",
     "keybinding": "Keybinding",
+    "keybindings": "Keybindings",
+    "extensions": "Extensions",
     "upload": "Upload",
     "export": "Export",
     "workflow": "Workflow",
@@ -192,6 +195,7 @@
     "missing": "Missing",
     "inProgress": "In progress",
     "completed": "Completed",
+    "completedWithCheckmark": "Completed ✓",
     "downloading": "Downloading",
     "interrupted": "Interrupted",
     "queued": "Queued",
@@ -255,6 +259,7 @@
     "batchRename": "Batch rename",
     "enterBaseName": "Enter base name",
     "enterNewName": "Enter new name",
+    "enterNewNamePrompt": "Enter new name:",
     "selectItemsToRename": "Select items to rename",
     "nothingToRename": "Nothing to rename",
     "moreWorkflows": "More workflows",
@@ -1003,6 +1008,7 @@
   "workflowService": {
     "exportWorkflow": "Export Workflow",
     "enterFilename": "Enter the filename",
+    "enterFilenamePrompt": "Enter the filename:",
     "saveWorkflow": "Save workflow"
   },
   "subgraphStore": {
@@ -1012,6 +1018,7 @@
     "overwriteBlueprintTitle": "Overwrite existing blueprint?",
     "overwriteBlueprint": "Saving will overwrite the current blueprint with your changes",
     "blueprintName": "Subgraph name",
+    "blueprintNamePrompt": "Subgraph name:",
     "promoteOutsideSubgraph": "Can't promote widget when not in subgraph",
     "publish": "Publish Subgraph",
     "publishSuccess": "Saved to Nodes Library",