Devices with only I or O Fix

Added new fields to track ALSA device capabilities, letting the application know whether a device supports capture or playback

Updated serialization to include the new flags in the JSON data exchanged with the UI

Modified the dummy driver so test devices always indicate capture and playback support

Adjusted the TypeScript model and dialog to filter device choices based on the new flags, ensuring only valid options appear in selectors

vite/src/pipedal/AlsaDeviceInfo.tsx

@@ -9,6 +9,8 @@ export default class AlsaDeviceInfo {
         this.sampleRates = input.sampleRates as number[];
         this.minBufferSize = input.minBufferSize;
         this.maxBufferSize = input.maxBufferSize;
+		this.supportsCapture = input.supportsCapture ? true : false;
+        this.supportsPlayback = input.supportsPlayback ? true : false;
         return this;
     }
     static deserialize_array(input: any): AlsaDeviceInfo[]
@@ -62,5 +64,7 @@ export default class AlsaDeviceInfo {
     longName: string = "";
     sampleRates: number[] = [];
     minBufferSize: number = 0;
-    maxBufferSize: number = 0; 
+    maxBufferSize: number = 0;
+    supportsCapture: boolean = false;
+    supportsPlayback: boolean = false;
 };