feat(keyboard): harden clipboard command and add What's New sheet

Stabilize clipboard long-press prepare/resume across paste alerts and cold start, add an in-app release-notes sheet with remote bilingual HTML, localize typing input settings, and bump build to 55.

OSGKeyboardShared/Models/TypingInputConfiguration.swift

@@ -22,6 +22,7 @@ public enum TypingInputSchema: String, CaseIterable, Identifiable, Codable, Send
         }
     }
 
+    /// Stable Rime schema `name:` (not UI copy). Keep Chinese so redeploy fingerprints stay stable.
     public var displayName: String {
         switch self {
         case .fullPinyin: return "全拼"
@@ -29,6 +30,15 @@ public enum TypingInputSchema: String, CaseIterable, Identifiable, Codable, Send
         case .sogouDoublePinyin: return "搜狗双拼"
         }
     }
+
+    /// Localizable UI label key (`AppL10n` / `SharedL10n`).
+    public var labelKey: String {
+        switch self {
+        case .fullPinyin: return "typing.schema.fullPinyin"
+        case .microsoftDoublePinyin: return "typing.schema.microsoftDoublePinyin"
+        case .sogouDoublePinyin: return "typing.schema.sogouDoublePinyin"
+        }
+    }
 }
 
 public enum PinyinFuzzyPair: String, CaseIterable, Identifiable, Codable, Sendable {