feat(ai): unify reply center and refresh keyboard AI features

- Merge invitation, task, blessing, clarification, and empathy actions
  into a single Reply flow, with three fixed, clearly labeled stance
  choices whenever user intent must not be guessed.
- Refine clipboard semantic routing with bilingual schedule,
  confirmation, and follow-up models, conservative language thresholds,
  and explicit-assignment guard for complaint-only text.
- Persist Apple account refresh state, harden session recovery, and
  surface durable account diagnostics across keyboard and app.
- Derive personal-style prompts through two-stage corpus evidence and
  apply real low-confidence ASR tendencies instead of neutral templates.
- Localize the new reply center, clipboard semantics, and personal-style
  surfaces in both English and Simplified Chinese.

OSGKeyboardExt/KeyboardViewController.swift

@@ -609,8 +609,8 @@ public final class KeyboardViewController: UIInputViewController {
         state.submitAIHint = { [weak self] card in
             self?.aiKeyboardCoordinator.submitHintCard(card)
         }
-        state.submitAIClipboardSkill = { [weak self] skill in
-            self?.aiKeyboardCoordinator.submitClipboardSkill(skill)
+        state.submitAIClipboardSkill = { [weak self] skill, replyScene in
+            self?.aiKeyboardCoordinator.submitClipboardSkill(skill, replyScene: replyScene)
         }
         state.runClipboardExportSkill = { [weak self] skillID, titles in
             AppGroupStore().setPendingShortcutRun(skillID: skillID, titles: titles)