Refine adaptive polish and cross-platform account support

Improve learned-style and clipboard skill presentation while keeping shared account clients buildable in the source-composed macOS target.

OSGKeyboardExt/Services/AIKeyboardCoordinator.swift

@@ -115,7 +115,8 @@ final class AIKeyboardCoordinator {
         var instruction = AIClipboardSkillCatalog.instruction(
             for: skill,
             locale: AIHintLocaleResolver.packLocale(),
-            translationTargetLocaleId: state.translationTargetLocaleId
+            translationTargetLocaleId: state.translationTargetLocaleId,
+            replyStyle: state.clipboardReplyStyle
         )
         if skill.kind == .export {
             instruction += "\nPreserve the source language, addresses, names, and proper nouns."

OSGKeyboardExt/Services/AppGroupPersistor.swift

@@ -124,6 +124,12 @@ public struct AppGroupPersistor {
             userCatalog: store.agentUserSkillCatalog,
             uiLanguage: language
         )
+        let activeStyle = store.activePolishStyle
+        // Built-in formal/corporate personalities must not make ordinary
+        // clipboard replies sound less like the user.
+        state.clipboardReplyStyle = AIClipboardReplyStyleContext.resolve(
+            activeStyle: activeStyle
+        )
     }
 
     /// Cloud without ASR/LLM keys blocks the mic. Local ASR still works when