fix(profiles): skip the resume profile prompt during a live companion-remote session

With "Ask for profile on app open" enabled, every screen-off or app
switch on a phone re-pushed the profile picker and PIN on resume, burying
a companion-remote session that survives backgrounding since the
reconnect cycle was made lifecycle-aware. Suppress the resume prompt
while a companion session is live, mirroring the active-playback
exemption — the session already belongs to the profile that started it.

close #2087

lib/screens/main_screen.dart

@@ -102,7 +102,10 @@ bool shouldHandleDesktopRootEscape({
 /// mid-stream must resume the stream, not stack the root-navigator picker
 /// over the live player route, whose focus self-heal fights the picker for
 /// the remote (#2034) — the playback session already belongs to the profile
-/// that started it.
+/// that started it. Likewise never during a live companion-remote session:
+/// a phone driving another device backgrounds and sleeps constantly, and
+/// the picker + PIN would bury a session that already belongs to the
+/// profile that started it (#2087).
 @visibleForTesting
 bool shouldShowProfileSelectionOnResume({
   required bool resumedFromBackground,
@@ -110,12 +113,14 @@ bool shouldShowProfileSelectionOnResume({
   required bool alreadyShowingProfileSelection,
   required bool isMobilePlatform,
   required bool hasActiveVideoPlayback,
+  required bool hasActiveCompanionRemoteSession,
 }) {
   return resumedFromBackground &&
       !isOffline &&
       !alreadyShowingProfileSelection &&
       isMobilePlatform &&
-      !hasActiveVideoPlayback;
+      !hasActiveVideoPlayback &&
+      !hasActiveCompanionRemoteSession;
 }
 
 /// Latches whether the app has genuinely left the foreground since the last
@@ -1140,6 +1145,12 @@ class _MainScreenState extends State<MainScreen>
       alreadyShowingProfileSelection: _isShowingProfileSelection,
       isMobilePlatform: Platform.isAndroid || Platform.isIOS,
       hasActiveVideoPlayback: VideoPlayerScreenState.activeGlobalKey != null,
+      // Short-circuit on resumedFromBackground: the provider is lazy and
+      // otherwise unused on phones, so an unconditional read would create it
+      // on the first lifecycle event for users who never open the remote.
+      // isInSession, not isConnected: on resume the held reconnect cycle
+      // means the session is typically still `reconnecting` (#2035).
+      hasActiveCompanionRemoteSession: resumedFromBackground && context.read<CompanionRemoteProvider>().isInSession,
     )) {
       _showProfileSelectionOnResume();
     }

test/screens/main_screen_layout_test.dart

@@ -147,13 +147,14 @@ void main() {
     );
   });
 
-  test('resume prompt is suppressed during active video playback (#2034)', () {
+  test('resume prompt is suppressed during playback (#2034) and companion sessions (#2087)', () {
     bool should({
       bool resumedFromBackground = true,
       bool isOffline = false,
       bool alreadyShowingProfileSelection = false,
       bool isMobilePlatform = true,
       bool hasActiveVideoPlayback = false,
+      bool hasActiveCompanionRemoteSession = false,
     }) {
       return shouldShowProfileSelectionOnResume(
         resumedFromBackground: resumedFromBackground,
@@ -161,6 +162,7 @@ void main() {
         alreadyShowingProfileSelection: alreadyShowingProfileSelection,
         isMobilePlatform: isMobilePlatform,
         hasActiveVideoPlayback: hasActiveVideoPlayback,
+        hasActiveCompanionRemoteSession: hasActiveCompanionRemoteSession,
       );
     }
 
@@ -168,6 +170,9 @@ void main() {
     // Waking the device mid-stream resumes the stream; the picker would
     // fight the player's focus self-heal for the remote.
     expect(should(hasActiveVideoPlayback: true), isFalse);
+    // A phone driving another device backgrounds constantly; the picker +
+    // PIN would bury the live remote session.
+    expect(should(hasActiveCompanionRemoteSession: true), isFalse);
     expect(should(resumedFromBackground: false), isFalse);
     expect(should(isOffline: true), isFalse);
     expect(should(alreadyShowingProfileSelection: true), isFalse);