refactor: remove dead stealth args, let binary handle GPU diversity

Remove --disable-blink-features=AutomationControlled (dead, binary handles
navigator.webdriver at source level) and hardcoded GPU vendor/renderer flags.
Binary auto-generates diverse GPU profiles from fingerprint seed. Improves
fingerprint diversity -- previously every user shared the same GPU string.

Bump to v0.3.21.

js/src/config.ts

@@ -211,27 +211,16 @@ export function getDefaultStealthArgs(): string[] {
 
   const base = [
     "--no-sandbox",
-    "--disable-blink-features=AutomationControlled",
     `--fingerprint=${seed}`,
   ];
 
   if (isMac) {
     // macOS: run as native Mac browser — GPU/UA match natively
-    return [
-      ...base,
-      "--fingerprint-platform=macos",
-      "--fingerprint-gpu-vendor=Google Inc. (Apple)",
-      "--fingerprint-gpu-renderer=ANGLE (Apple, ANGLE Metal Renderer: Apple M3, Unspecified Version)",
-    ];
+    return [...base, "--fingerprint-platform=macos"];
   }
 
   // Linux/Windows: spoof as Windows desktop
-  // Hardware concurrency, device memory, screen, and window size are
+  // Hardware concurrency, device memory, screen, window size, and GPU are
   // auto-generated by the binary from the seed (v14+).
-  return [
-    ...base,
-    "--fingerprint-platform=windows",
-    "--fingerprint-gpu-vendor=Google Inc. (NVIDIA)",
-    "--fingerprint-gpu-renderer=ANGLE (NVIDIA, NVIDIA GeForce RTX 3070 (0x00002484) Direct3D11 vs_5_0 ps_5_0, D3D11)",
-  ];
+  return [...base, "--fingerprint-platform=windows"];
 }