Refactor Voice Messages (#1075)

* Extract voice-related code to a dedicated VM

* Minor optimization of permission request + fix ui bug

When isPreparing is being set to true before permission is granted, the UI is shown for a fraction of a second and it’s even worse if the permission is being asked constantly if the user drags the finger even when the alert is shown

* Remove dead code

* Remove unnecessary delegate conformance

* `actor VoiceRecorder` + other minor improvements

* Centralized opening system settings + open for mic access

* Better voice-recording state handling with Enum

* Remove manual timer management

* Simplify formatting + avoid jumping UI w/ countdown

* Add `requestingPermission` state to avoid repetitive calls

* Improve guarding of the states after awaits

* Fix potential “actor reentrancy across awaits” issue

* Remove short-circuiting on .idle + guard before error

* Fix playbackLabel’s formatting for duration vs remainder

---------

Co-authored-by: jack <212554440+jackjackbits@users.noreply.github.com>

bitchat/Views/LocationChannelsSheet.swift

@@ -125,7 +125,7 @@ struct LocationChannelsSheet: View {
                             Text(Strings.permissionDenied)
                                 .font(.bitchatSystem(size: 12, design: .monospaced))
                                 .foregroundColor(.secondary)
-                            Button(Strings.openSettings) { openSystemLocationSettings() }
+                            Button(Strings.openSettings, action: SystemSettings.location.open)
                             .buttonStyle(.plain)
                         }
                     case LocationChannelManager.PermissionState.authorized:
@@ -246,9 +246,7 @@ struct LocationChannelsSheet: View {
                     sectionDivider
                     torToggleSection
                         .padding(.top, 12)
-                    Button(action: {
-                        openSystemLocationSettings()
-                    }) {
+                    Button(action: SystemSettings.location.open) {
                         Text(Strings.removeAccess)
                             .font(.bitchatSystem(size: 12, design: .monospaced))
                             .foregroundColor(Color(red: 0.75, green: 0.1, blue: 0.1))
@@ -622,18 +620,3 @@ extension LocationChannelsSheet {
         }
     }
 }
-
-// MARK: - Open Settings helper
-private func openSystemLocationSettings() {
-    #if os(iOS)
-    if let url = URL(string: UIApplication.openSettingsURLString) {
-        UIApplication.shared.open(url)
-    }
-    #else
-    if let url = URL(string: "x-apple.systempreferences:com.apple.preference.security?Privacy_LocationServices") {
-        NSWorkspace.shared.open(url)
-    } else if let url = URL(string: "x-apple.systempreferences:com.apple.preference.security") {
-        NSWorkspace.shared.open(url)
-    }
-    #endif
-}