Refactor Tauri Integration to Use Platform Context

- Replaced direct Tauri API calls with a unified platform context across multiple components, enhancing code maintainability and readability.
- Removed the deprecated tauri.ts file, consolidating platform-related logic into the new PlatformContext.
- Updated components such as App, AudioPlayer, and ServerSettings to utilize the new platform context for lifecycle management and server interactions.
- Improved platform detection and handling for audio playback and system audio capture functionalities.
- Ensured consistent error handling and user feedback across the application when interacting with platform-specific features.

tauri/src/platform/filesystem.ts

@@ -0,0 +1,30 @@
+import type { PlatformFilesystem, FileFilter } from '@/platform/types';
+
+export const tauriFilesystem: PlatformFilesystem = {
+  async saveFile(filename: string, blob: Blob, filters?: FileFilter[]) {
+    try {
+      const { save } = await import('@tauri-apps/plugin-dialog');
+      const filePath = await save({
+        defaultPath: filename,
+        filters: filters || [],
+      });
+
+      if (filePath) {
+        const { writeBinaryFile } = await import('@tauri-apps/plugin-fs');
+        const arrayBuffer = await blob.arrayBuffer();
+        await writeBinaryFile(filePath, new Uint8Array(arrayBuffer));
+      }
+    } catch (error) {
+      console.error('Failed to use Tauri dialog, falling back to browser download:', error);
+      // Fall back to browser download if Tauri dialog fails
+      const url = window.URL.createObjectURL(blob);
+      const a = document.createElement('a');
+      a.href = url;
+      a.download = filename;
+      document.body.appendChild(a);
+      a.click();
+      window.URL.revokeObjectURL(url);
+      document.body.removeChild(a);
+    }
+  },
+};