Make Sidebar react to the nickname and RSSI changes. (#228)

app/src/main/java/com/bitchat/android/ui/ChatHeader.kt

@@ -211,6 +211,7 @@ fun ChatHeaderContent(
             val favoritePeers by viewModel.favoritePeers.observeAsState(emptySet())
             val peerFingerprints by viewModel.peerFingerprints.observeAsState(emptyMap())
             val peerSessionStates by viewModel.peerSessionStates.observeAsState(emptyMap())
+            val peerNicknames by viewModel.peerNicknames.observeAsState(emptyMap())
             
             // Reactive favorite computation - no more static lookups!
             val isFavorite = isFavoriteReactive(
@@ -224,7 +225,7 @@ fun ChatHeaderContent(
             
             PrivateChatHeader(
                 peerID = selectedPrivatePeer,
-                peerNicknames = viewModel.meshService.getPeerNicknames(),
+                peerNicknames = peerNicknames,
                 isFavorite = isFavorite,
                 sessionState = sessionState,
                 onBackClick = onBackClick,

app/src/main/java/com/bitchat/android/ui/ChatState.kt

@@ -98,6 +98,12 @@ class ChatState {
     private val _peerFingerprints = MutableLiveData<Map<String, String>>(emptyMap())
     val peerFingerprints: LiveData<Map<String, String>> = _peerFingerprints
 
+    private val _peerNicknames = MutableLiveData<Map<String, String>>(emptyMap())
+    val peerNicknames: LiveData<Map<String, String>> = _peerNicknames
+
+    private val _peerRSSI = MutableLiveData<Map<String, Int>>(emptyMap())
+    val peerRSSI: LiveData<Map<String, Int>> = _peerRSSI
+    
     // peerIDToPublicKeyFingerprint REMOVED - fingerprints now handled centrally in PeerManager
     
     // Navigation state
@@ -242,6 +248,14 @@ class ChatState {
         _peerFingerprints.value = fingerprints
     }
 
+    fun setPeerNicknames(nicknames: Map<String, String>) {
+        _peerNicknames.value = nicknames
+    }
+
+    fun setPeerRSSI(rssi: Map<String, Int>) {
+        _peerRSSI.value = rssi
+    }
+    
     fun setShowAppInfo(show: Boolean) {
         _showAppInfo.value = show
     }

app/src/main/java/com/bitchat/android/ui/ChatViewModel.kt

@@ -88,6 +88,8 @@ class ChatViewModel(
     val favoritePeers: LiveData<Set<String>> = state.favoritePeers
     val peerSessionStates: LiveData<Map<String, String>> = state.peerSessionStates
     val peerFingerprints: LiveData<Map<String, String>> = state.peerFingerprints
+    val peerNicknames: LiveData<Map<String, String>> = state.peerNicknames
+    val peerRSSI: LiveData<Map<String, Int>> = state.peerRSSI
     val showAppInfo: LiveData<Boolean> = state.showAppInfo
     
     init {
@@ -303,7 +305,7 @@ class ChatViewModel(
     }
     
     /**
-     * Update reactive states for all connected peers (session states and fingerprints)
+     * Update reactive states for all connected peers (session states, fingerprints, nicknames, RSSI)
      */
     private fun updateReactiveStates() {
         val currentPeers = state.getConnectedPeersValue()
@@ -313,10 +315,15 @@ class ChatViewModel(
             meshService.getSessionState(peerID).toString()
         }
         state.setPeerSessionStates(sessionStates)
-        
         // Update fingerprint mappings from centralized manager
         val fingerprints = privateChatManager.getAllPeerFingerprints()
         state.setPeerFingerprints(fingerprints)
+
+        val nicknames = meshService.getPeerNicknames()
+        state.setPeerNicknames(nicknames)
+
+        val rssiValues = meshService.getPeerRSSI()
+        state.setPeerRSSI(rssiValues)
     }
     
     // MARK: - Debug and Troubleshooting

app/src/main/java/com/bitchat/android/ui/SidebarComponents.kt

@@ -43,10 +43,8 @@ fun SidebarOverlay(
     val selectedPrivatePeer by viewModel.selectedPrivateChatPeer.observeAsState()
     val nickname by viewModel.nickname.observeAsState("")
     val unreadChannelMessages by viewModel.unreadChannelMessages.observeAsState(emptyMap())
-    
-    // Get peer data from mesh service
-    val peerNicknames = viewModel.meshService.getPeerNicknames()
-    val peerRSSI = viewModel.meshService.getPeerRSSI()
+    val peerNicknames by viewModel.peerNicknames.observeAsState(emptyMap())
+    val peerRSSI by viewModel.peerRSSI.observeAsState(emptyMap())
 
     Box(
         modifier = modifier