feat: move talk mode to overlay button

apps/ios/Sources/RootCanvas.swift

@@ -120,6 +120,8 @@ struct RootCanvas: View {
 
 private struct CanvasContent: View {
     @Environment(NodeAppModel.self) private var appModel
+    @AppStorage("talk.enabled") private var talkEnabled: Bool = false
+    @AppStorage("talk.button.enabled") private var talkButtonEnabled: Bool = true
     var systemColorScheme: ColorScheme
     var bridgeStatus: StatusPill.BridgeState
     var voiceWakeEnabled: Bool
@@ -141,6 +143,19 @@ private struct CanvasContent: View {
                 }
                 .accessibilityLabel("Chat")
 
+                if self.talkButtonEnabled {
+                    // Talk mode lives on a side bubble so it doesn't get buried in settings.
+                    OverlayButton(
+                        systemImage: self.appModel.talkMode.isEnabled ? "waveform.circle.fill" : "waveform.circle",
+                        brighten: self.brightenButtons)
+                    {
+                        let next = !self.appModel.talkMode.isEnabled
+                        self.talkEnabled = next
+                        self.appModel.setTalkEnabled(next)
+                    }
+                    .accessibilityLabel("Talk Mode")
+                }
+
                 OverlayButton(systemImage: "gearshape.fill", brighten: self.brightenButtons) {
                     self.openSettings()
                 }

apps/ios/Sources/Settings/SettingsTab.swift

@@ -21,6 +21,7 @@ struct SettingsTab: View {
     @AppStorage("node.instanceId") private var instanceId: String = UUID().uuidString
     @AppStorage("voiceWake.enabled") private var voiceWakeEnabled: Bool = false
     @AppStorage("talk.enabled") private var talkEnabled: Bool = false
+    @AppStorage("talk.button.enabled") private var talkButtonEnabled: Bool = true
     @AppStorage("camera.enabled") private var cameraEnabled: Bool = true
     @AppStorage("screen.preventSleep") private var preventSleep: Bool = true
     @AppStorage("bridge.preferredStableID") private var preferredBridgeStableID: String = ""
@@ -161,6 +162,8 @@ struct SettingsTab: View {
                         .onChange(of: self.talkEnabled) { _, newValue in
                             self.appModel.setTalkEnabled(newValue)
                         }
+                    // Keep this separate so users can hide the side bubble without disabling Talk Mode.
+                    Toggle("Show Talk Button", isOn: self.$talkButtonEnabled)
 
                     NavigationLink {
                         VoiceWakeWordsSettingsView()