feat(gif-worker): increase amount of web workers based on hardwareconcurrecy

(cherry picked from commit 63fd87612ea5a9e158762d6e68c401c4331d2803)

src/lib/exporter/gifExporter.ts

@@ -124,9 +124,11 @@ export class GifExporter {
       // Initialize GIF encoder
       // Loop: 0 = infinite loop, 1 = play once (no loop)
       const repeat = this.config.loop ? 0 : 1;
+      const cores = navigator.hardwareConcurrency || 4;
+      const WORKER_COUNT = Math.max(1, Math.min(8, cores - 1));
 
       this.gif = new GIF({
-        workers: 4,
+        workers: WORKER_COUNT,
         quality: 10,
         width: this.config.width,
         height: this.config.height,