fix(#141): notification tap opens original session instead of new session (#147)

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

app/src/main/java/com/m57/hermescontrol/MainActivity.kt

@@ -9,6 +9,7 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
 import androidx.compose.ui.Modifier
 import com.m57.hermescontrol.data.local.AuthManager
+import com.m57.hermescontrol.notification.NotificationReplyReceiver
 import com.m57.hermescontrol.theme.HermesControlTheme
 
 class MainActivity : ComponentActivity() {
@@ -17,6 +18,9 @@ class MainActivity : ComponentActivity() {
 
         AuthManager.init(this)
 
+        // Read notification tap sessionId (if any) from the intent that launched us
+        val notificationSessionId = intent?.getStringExtra(NotificationReplyReceiver.EXTRA_SESSION_ID)
+
         enableEdgeToEdge()
         setContent {
             // B6 (Jun 18 2026, kanban t_86e9be9b): read the stored theme
@@ -28,7 +32,7 @@ class MainActivity : ComponentActivity() {
                     modifier = Modifier.fillMaxSize(),
                     color = MaterialTheme.colorScheme.background,
                 ) {
-                    MainNavigation()
+                    MainNavigation(sessionId = notificationSessionId)
                 }
             }
         }

app/src/main/java/com/m57/hermescontrol/Navigation.kt

@@ -171,7 +171,7 @@ private val DRAWER_ENTRIES =
 private val DRAWER_GESTURE_SCREENS: Set<NavKey> = ALL_NAV_ITEMS.map { it.key }.toSet()
 
 @Composable
-fun MainNavigation() {
+fun MainNavigation(sessionId: String? = null) {
     val hasToken = !AuthManager.getToken().isNullOrBlank()
     val startScreen: NavKey = if (hasToken) ChatScreen else ConnectScreen
 
@@ -315,7 +315,7 @@ fun MainNavigation() {
         ) { paddingValues ->
             NavDisplay(
                 backStack = backStack,
-                onBack = { backStack.removeLastOrNull() },
+                onBack = { NavigationController.goBack() },
                 entryProvider =
                     entryProvider {
                         entry<ConnectScreen> {
@@ -331,12 +331,13 @@ fun MainNavigation() {
                         entry<ChatScreen> {
                             ChatScreenContent(
                                 onOpenDrawer = { openDrawer() },
+                                sessionId = sessionId,
                             )
                         }
 
                         entry<SettingsScreen> {
                             SettingsScreenContent(
-                                onBack = { backStack.removeLastOrNull() },
+                                onBack = { NavigationController.goBack() },
                             )
                         }
 

app/src/main/java/com/m57/hermescontrol/notification/ChatNotificationService.kt

@@ -103,7 +103,7 @@ class ChatNotificationService : Service() {
                 .setStyle(NotificationCompat.BigTextStyle().bigText(text))
                 .setPriority(NotificationCompat.PRIORITY_HIGH)
                 .setAutoCancel(true)
-                .setContentIntent(buildContentIntent())
+                .setContentIntent(buildContentIntent(sessionId))
 
         if (!sessionId.isNullOrBlank()) {
             val replyLabel = "Type your reply..."
@@ -142,13 +142,18 @@ class ChatNotificationService : Service() {
         manager.notify(PENDING_NOTIFICATION_ID, builder.build())
     }
 
-    private fun buildContentIntent(): PendingIntent =
+    private fun buildContentIntent(sessionId: String?): PendingIntent {
-        PendingIntent.getActivity(
+        val intent = Intent(this, MainActivity::class.java)
+        if (!sessionId.isNullOrBlank()) {
+            intent.putExtra(NotificationReplyReceiver.EXTRA_SESSION_ID, sessionId)
+        }
+        return PendingIntent.getActivity(
             this,
-            0,
+            sessionId?.hashCode() ?: 0,
-            Intent(this, MainActivity::class.java),
+            intent,
             PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT,
         )
+    }
 
     private fun buildForegroundNotification(text: String): Notification =
         NotificationCompat

app/src/main/java/com/m57/hermescontrol/ui/chat/ChatScreen.kt

@@ -101,6 +101,7 @@ import com.m57.hermescontrol.ui.common.HermesScaffold
 fun ChatScreen(
     modifier: Modifier = Modifier,
     onOpenDrawer: (() -> Unit)? = null,
+    sessionId: String? = null,
     viewModel: ChatViewModel = viewModel(),
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
@@ -111,6 +112,14 @@ fun ChatScreen(
     val context = LocalContext.current
     val lifecycleOwner = androidx.lifecycle.compose.LocalLifecycleOwner.current
 
+    // Switch to the session from a notification tap when provided.
+    // Runs once per sessionId value (re-runs if a different notification taps in).
+    LaunchedEffect(sessionId) {
+        if (!sessionId.isNullOrBlank()) {
+            viewModel.switchSession(sessionId)
+        }
+    }
+
     // Manage notification foreground service lifecycle:
     // - When app goes to background (ON_STOP), mark as not-foreground and
     //   start the notification service so we can post reply notifications.