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.

OSGKeyboardShared/Services/KeyboardState.swift

@@ -362,8 +362,8 @@ public final class KeyboardState: ObservableObject {
     public var performAssistantFieldAction: () -> Void = {}
     /// Sends a tapped idle hint card as the AI question (skip microphone).
     public var submitAIHint: (AIHintCard) -> Void = { _ in }
-    /// Sends a clipboard skill (reply / summarize / translate / export).
-    public var submitAIClipboardSkill: (AIClipboardSkill) -> Void = { _ in }
+    /// Sends a clipboard skill plus any source-bound Reply scene modifier.
+    public var submitAIClipboardSkill: (AIClipboardSkill, AIClipboardReplyScene?) -> Void = { _, _ in }
     /// Writes extract-todos titles and opens the host to run the Shortcut.
     public var runClipboardExportSkill: (String, [String]) -> Void = { _, _ in }
     public var openSettings: () -> Void = {}