feat(keyboard): unify assistant voice and AI workflows

Merge dictation and AI controls into one assistant surface, preserve safe insertion and clipboard actions, and align settings and tests with the new flow.

OSGKeyboardExt/Views/ToolbarActionButtons.swift

@@ -206,6 +206,7 @@ struct RectangularToolbarButton: View {
     let usesCircleGlass: Bool
     /// Settings → General → Haptics; space / return use `.action` role.
     var hapticIntensity: KeyboardHapticIntensity = .off
+    var onPressingChanged: (Bool) -> Void = { _ in }
     let action: () -> Void
 
     init(
@@ -215,6 +216,7 @@ struct RectangularToolbarButton: View {
         usesLiquidGlass: Bool = false,
         usesCircleGlass: Bool = false,
         hapticIntensity: KeyboardHapticIntensity = .off,
+        onPressingChanged: @escaping (Bool) -> Void = { _ in },
         action: @escaping () -> Void
     ) {
         self.systemName = systemName
@@ -226,6 +228,7 @@ struct RectangularToolbarButton: View {
         self.usesLiquidGlass = usesLiquidGlass
         self.usesCircleGlass = usesCircleGlass
         self.hapticIntensity = hapticIntensity
+        self.onPressingChanged = onPressingChanged
         self.action = action
     }
 
@@ -236,6 +239,7 @@ struct RectangularToolbarButton: View {
         isSend: Bool = false,
         usesLiquidGlass: Bool = false,
         hapticIntensity: KeyboardHapticIntensity = .off,
+        onPressingChanged: @escaping (Bool) -> Void = { _ in },
         action: @escaping () -> Void
     ) {
         self.systemName = nil
@@ -246,6 +250,7 @@ struct RectangularToolbarButton: View {
         self.usesLiquidGlass = usesLiquidGlass
         self.usesCircleGlass = false
         self.hapticIntensity = hapticIntensity
+        self.onPressingChanged = onPressingChanged
         self.action = action
         self.title = title
     }
@@ -256,6 +261,7 @@ struct RectangularToolbarButton: View {
         disabled: Bool = false,
         usesLiquidGlass: Bool = false,
         hapticIntensity: KeyboardHapticIntensity = .off,
+        onPressingChanged: @escaping (Bool) -> Void = { _ in },
         action: @escaping () -> Void
     ) {
         self.systemName = nil
@@ -267,6 +273,7 @@ struct RectangularToolbarButton: View {
         self.usesLiquidGlass = usesLiquidGlass
         self.usesCircleGlass = false
         self.hapticIntensity = hapticIntensity
+        self.onPressingChanged = onPressingChanged
         self.action = action
     }
 
@@ -280,6 +287,11 @@ struct RectangularToolbarButton: View {
             .allowsHitTesting(!disabled)
             .accessibilityLabel(Text(label))
             .accessibilityAddTraits(.isButton)
+            .onDisappear {
+                guard isPressing else { return }
+                isPressing = false
+                onPressingChanged(false)
+            }
     }
 
     @ViewBuilder
@@ -337,12 +349,14 @@ struct RectangularToolbarButton: View {
             .onChanged { _ in
                 guard !disabled, !isPressing else { return }
                 isPressing = true
+                onPressingChanged(true)
                 KeyboardSoundFeedback.keyClick()
                 KeyboardHapticFeedback.play(role: .action, intensity: hapticIntensity)
                 action()
             }
             .onEnded { _ in
                 isPressing = false
+                onPressingChanged(false)
             }
     }
 }