fix(ipad): ship iPad P0 layout/globe fixes, edit-last-input, drop clipboard commands

Adapt typing/voice surfaces for iPad width and height, add the system globe
key and last-input editing flow, harden host-only Rime deployment, and remove
clipboard voice commands. Bump build to 61.

OSGKeyboardShared/Models/FlowUtteranceMode.swift

@@ -1,14 +1,36 @@
 // FlowUtteranceMode.swift
 // OSGKeyboard · Shared
 //
-// Distinguishes dictation polish from clipboard-command generation on the
-// Flow command / result wire (plan §11).
+// Distinguishes dictation polish from explicit last-input editing on the
+// Flow command / result wire.
 
 import Foundation
 
 public enum FlowUtteranceMode: String, Codable, Equatable, Sendable {
     /// ASR is draft text to polish and insert (default / legacy).
     case dictation
-    /// ASR is an instruction over a frozen clipboard snapshot.
-    case clipboardCommand
+    /// ASR is an explicit instruction over the last verified OSG insertion.
+    case editLastInput
+    /// Decoded only from retired or unknown wire modes. Production code must
+    /// reject this value and must never treat it as dictation.
+    case unsupportedLegacy
+
+    public init(from decoder: Decoder) throws {
+        let container = try decoder.singleValueContainer()
+        switch try container.decode(String.self) {
+        case Self.dictation.rawValue:
+            self = .dictation
+        case Self.editLastInput.rawValue:
+            self = .editLastInput
+        case "clipboardCommand", Self.unsupportedLegacy.rawValue:
+            self = .unsupportedLegacy
+        default:
+            self = .unsupportedLegacy
+        }
+    }
+
+    public func encode(to encoder: Encoder) throws {
+        var container = encoder.singleValueContainer()
+        try container.encode(rawValue)
+    }
 }