Fix RSSI display inconsistency between devices

- Add default RSSI value (-60) for connected peers without RSSI data
- Transfer RSSI from peripheral discovery to peer after key exchange
- Fixes red dot showing for nearby devices that can't report RSSI
- Centrals (phones acting as servers) now show green by default

bitchat/Services/BluetoothMeshService.swift

@@ -658,7 +658,18 @@ class BluetoothMeshService: NSObject {
     }
     
     func getPeerRSSI() -> [String: NSNumber] {
-        return peerRSSI
+        // Create a copy with default values for connected peers without RSSI
+        var rssiWithDefaults = peerRSSI
+        
+        // For any active peer without RSSI, assume decent signal (-60)
+        // This handles centrals where we can't read RSSI
+        for peerID in activePeers {
+            if rssiWithDefaults[peerID] == nil {
+                rssiWithDefaults[peerID] = NSNumber(value: -60)  // Good signal default
+            }
+        }
+        
+        return rssiWithDefaults
     }
     
     // Emergency disconnect for panic situations
@@ -1145,6 +1156,12 @@ class BluetoothMeshService: NSObject {
                         viewModel.registerPeerPublicKey(peerID: senderID, publicKeyData: identityKeyData)
                     }
                     
+                    // If we have RSSI from discovery, apply it to this peer
+                    if let peripheral = peripheral,
+                       let tempRSSI = peripheralRSSI[peripheral.identifier.uuidString] {
+                        peerRSSI[senderID] = tempRSSI
+                    }
+                    
                     // Track this peer temporarily
                     if senderID != "unknown" && senderID != myPeerID {
                         // Check if we need to update peripheral mapping from the specific peripheral that sent this