feat(auth): pywebview вместо webengine

- добавлен auth_webview.py и режим --auth

- build.py обновлён, WebEngine исключён

- pywebview добавлен в requirements

auth_webview.py

@@ -0,0 +1,78 @@
+import os
+import sys
+import time
+import json
+import threading
+from urllib.parse import urlparse, parse_qs, unquote
+
+import webview
+
+
+def extract_token(url_string):
+    token = None
+    expires_in = 3600
+    parsed = urlparse(url_string)
+
+    if parsed.fragment:
+        params = parse_qs(parsed.fragment)
+    else:
+        params = parse_qs(parsed.query)
+
+    if 'access_token' in params:
+        token = params['access_token'][0]
+    if 'expires_in' in params:
+        try:
+            expires_in = int(params['expires_in'][0])
+        except ValueError:
+            pass
+
+    if not token:
+        start_marker = "access_token%253D"
+        end_marker = "%25"
+
+        start_index = url_string.find(start_marker)
+        if start_index != -1:
+            token_start_index = start_index + len(start_marker)
+            remaining_url = url_string[token_start_index:]
+            end_index = remaining_url.find(end_marker)
+
+            if end_index != -1:
+                raw_token = remaining_url[:end_index]
+            else:
+                amp_index = remaining_url.find('&')
+                if amp_index != -1:
+                    raw_token = remaining_url[:amp_index]
+                else:
+                    raw_token = remaining_url
+            token = unquote(raw_token)
+
+    return token, expires_in
+
+
+def main_auth(auth_url, output_path):
+    def poll_url():
+        try:
+            url = window.get_current_url()
+        except Exception:
+            url = None
+        if url:
+            token, expires_in = extract_token(url)
+            if token:
+                data = {"token": token, "expires_in": expires_in}
+                with open(output_path, "w", encoding="utf-8") as f:
+                    json.dump(data, f)
+                window.destroy()
+                return
+        threading.Timer(0.5, poll_url).start()
+
+    def on_loaded():
+        threading.Timer(0.5, poll_url).start()
+
+    window = webview.create_window("VK Авторизация", auth_url)
+    window.events.loaded += on_loaded
+    storage_path = os.path.join(os.path.dirname(output_path), "webview_profile")
+    webview.start(private_mode=False, storage_path=storage_path)
+
+
+if __name__ == "__main__":
+    main()