Fix crashes

Author: liamcharger

InfiniLink/BLE/BLEManager.swift

@@ -294,6 +294,10 @@ class BLEManager: NSObject, ObservableObject, CBCentralManagerDelegate, CBPeriph
         isConnecting = false
         isScanning = false
 
+        if !isBluetoothOn {
+            disconnect()
+        }
+        
         if isBluetoothOn && !isConnectedToPinetime {
             startScanning()
         }
@@ -324,6 +328,11 @@ class BLEManager: NSObject, ObservableObject, CBCentralManagerDelegate, CBPeriph
     }
 
     func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) {
+        guard error == nil else {
+            log(error!.localizedDescription, caller: "didUpdateValueFor characteristic", target: .ble)
+            return
+        }
+        
         deviceManager.updateInfo(characteristic: characteristic)
         characteristicHandler.handleUpdates(characteristic: characteristic, peripheral: peripheral)
     }

InfiniLink/BLE/DeviceManager.swift

@@ -225,8 +225,12 @@ extension DeviceManager {
         case cbuuids.manufacturer:
             bleManager.pairedDevice.manufacturer = String(data: value, encoding: .utf8) ?? ""
         case cbuuids.blefsVersion:
-            let byteArray = [UInt8](characteristic.value!)
-            bleManager.pairedDevice.blefsVersion = String(Int(byteArray[1])) + String(Int(byteArray[0]))
+            let byteArray = [UInt8](value)
+            if byteArray.count >= 2 {
+                bleManager.pairedDevice.blefsVersion = "\(Int(byteArray[1]))\(Int(byteArray[0]))"
+            } else {
+                bleManager.pairedDevice.blefsVersion = "00" // or some fallback
+            }
         default:
             break
         }

InfiniLink/Utils/MusicController.swift

@@ -120,6 +120,10 @@ class MusicController {
     }
 
     func convertTime(value: Double) -> [UInt8] {
+        guard value.isFinite && !value.isNaN else {
+            return [0, 0, 0, 0]
+        }
+        
         let val32: UInt32 = UInt32(floor(value))
 
         let byte1 = UInt8(val32 & 0x000000FF)