fix(i18n): drop untranslatable plural placeholder from uploadingAttachments

The English plural-suffix hack (file{{value1}} with value1=''/'s') can't be
expressed in ja/ko/zh, whose translations correctly omit {{value1}} — but
verify:localization-catalog requires exact placeholder parity, so main
fails lint for every PR. Use the catalog's established '(s)' convention
instead and drop value1 from the caller; CJK translations stay intact.
The sync repair script would have overwritten them with English text.

Co-authored-by: Orca <help@stably.ai>

src/renderer/src/components/native-chat/native-chat-attachment-upload.ts

@@ -84,8 +84,8 @@ export async function uploadNativeChatAttachmentPaths(
   const pending = toast.loading(
     translate(
       'components.native-chat.composer.uploadingAttachments',
-      'Uploading {{value0}} file{{value1}} to remote…',
-      { value0: paths.length, value1: paths.length === 1 ? '' : 's' }
+      'Uploading {{value0}} file(s) to remote…',
+      { value0: paths.length }
     )
   )
   try {

src/renderer/src/i18n/locales/en.json

@@ -12877,7 +12877,7 @@
         "pastedImageLabel": "Pasted image",
         "imagePasteFailed": "Image paste failed.",
         "worktreeNotReady": "Worktree not ready — try again in a moment.",
-        "uploadingAttachments": "Uploading {{value0}} file{{value1}} to remote…"
+        "uploadingAttachments": "Uploading {{value0}} file(s) to remote…"
       },
       "tool": {
         "running": "Running…",

src/renderer/src/i18n/locales/es.json

@@ -12877,7 +12877,7 @@
         "pastedImageLabel": "Imagen pegada",
         "imagePasteFailed": "Error al pegar imagen.",
         "worktreeNotReady": "Worktree no está listo — intenta de nuevo en un momento.",
-        "uploadingAttachments": "Subiendo {{value0}} archivo{{value1}} al remoto…"
+        "uploadingAttachments": "Subiendo {{value0}} archivo(s) al remoto…"
       },
       "tool": {
         "running": "Ejecutando…",