Fix build warnings: add isImageFile util, exclude heavy components

from eager glob, clean up dynamic import conflicts

- Add missing isImageFile() to format-money utils
- Exclude BaseMultiselect, InvoicePublicPage, InvoiceInformationCard
  from eager glob in global-components.ts using negative patterns
- Short-circuit English locale in i18n to avoid redundant dynamic import
- Only en.json warning remains (intentional: English bundled inline)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

resources/scripts-v2/plugins/i18n.ts

@@ -27,6 +27,13 @@ async function loadLanguageMessages(
     return languageCache.get(locale)!
   }
 
+  // English is already statically imported — no dynamic import needed
+  if (locale === 'en') {
+    const messages = en as unknown as Record<string, unknown>
+    languageCache.set('en', messages)
+    return messages
+  }
+
   const fileName = LOCALE_FILE_MAP[locale] ?? locale
 
   try {