feat(keyboard): improve typing, voice flow, and polish reliability

Reduce extension memory pressure and delivery races while adding richer candidates, tactile feedback, and safer two-level creative polishing.

OSGKeyboardMac/MacDictationPipeline.swift

@@ -244,7 +244,6 @@ enum MacDictationPipeline {
            !supplement.isEmpty {
             polishContext = PolishContext(
                 appContext: store.detectedAppContext?.context ?? .unknown,
-                intensity: store.polishIntensity,
                 dictionarySupplement: supplement
             )
         } else {

OSGKeyboardMac/MacSettingsView.swift

@@ -345,6 +345,15 @@ struct MacSettingsView: View {
                 .buttonStyle(.plain)
                 .frame(maxWidth: .infinity, minHeight: MacMetrics.settingsRowMinHeight, alignment: .leading)
                 .padding(.horizontal, MacMetrics.settingsCardInset)
+
+                // Read-only version row at the bottom of About.
+                MacInlineRow(title: MacL10n.string("mac.settings.version", language: lang)) {
+                    Text(AppVersionDisplay.detailedLabel)
+                        .font(MacSettingsType.rowLabel)
+                        .foregroundStyle(palette.textSecondary)
+                        .multilineTextAlignment(.trailing)
+                }
+                .accessibilityElement(children: .combine)
             }
         }
     }