fix: resolve BLE device discovery serialization and Redux state issues

src/api/connection.ts

@@ -25,9 +25,14 @@ export const requestAutoConnectPort = async () => {
 export const getAllBluetooth = async () => {
   const response = (await invoke("get_all_bluetooth", {
     request: {},
-  })) as { candidates: string[] };
-
-  return response.candidates;
+  })) as { candidates: Array<{ 0: string }> | string[] };
+
+  // Handle both formats: newtype struct { 0: string } and plain strings
+  return Array.isArray(response.candidates)
+    ? response.candidates.map((candidate: any) =>
+        typeof candidate === "string" ? candidate : candidate[0],
+      )
+    : [];
 };
 
 export const getAllSerialPorts = async () => {

src/features/device/api.ts

@@ -63,11 +63,17 @@ export const useDeviceApi = () => {
     const TYPE = DeviceApiActions.GetAvailableBluetoothDevices;
 
     await trackRequestOperation(TYPE, dispatch, async () => {
-      const bluetoothDevices = await backendConnectionApi.getAllBluetooth();
+      try {
+        const bluetoothDevices = await backendConnectionApi.getAllBluetooth();
 
-      dispatch(
-        deviceSliceActions.setAvailableBluetoothDevices(bluetoothDevices),
-      );
+        dispatch(
+          deviceSliceActions.setAvailableBluetoothDevices(bluetoothDevices),
+        );
+      } catch (e) {
+        // Handle BLE scanning errors gracefully
+        console.error("Failed to scan for Bluetooth devices:", e);
+        dispatch(deviceSliceActions.setAvailableBluetoothDevices([]));
+      }
     });
   };
 

src/features/device/slice.ts

@@ -63,6 +63,10 @@ export const deviceSlice = createSlice({
     setAutoConnectPort: (state, action: PayloadAction<string | null>) => {
       state.autoConnectPort = action.payload;
     },
+
+    setAutoConnectBluetooth: (state, action: PayloadAction<string | null>) => {
+      state.autoConnectBluetooth = action.payload;
+    },
   },
 });