fix(core,security): safe update extraction and async bulk vk actions

services/auto_update_service.py

@@ -9,6 +9,18 @@ import zipfile
 
 
 class AutoUpdateService:
+    @staticmethod
+    def _safe_extract_zip(archive, destination_dir):
+        destination_real = os.path.realpath(destination_dir)
+        for member in archive.infolist():
+            member_name = member.filename or ""
+            if not member_name:
+                continue
+            target_path = os.path.realpath(os.path.join(destination_dir, member_name))
+            if target_path != destination_real and not target_path.startswith(destination_real + os.sep):
+                raise RuntimeError(f"Unsafe path in update archive: {member_name}")
+        archive.extractall(destination_dir)
+
     @staticmethod
     def download_update_archive(download_url, destination_path):
         request = urllib.request.Request(
@@ -215,6 +227,6 @@ class AutoUpdateService:
         cls.verify_update_checksum(zip_path, checksum_url, download_name)
         os.makedirs(unpack_dir, exist_ok=True)
         with zipfile.ZipFile(zip_path, "r") as archive:
-            archive.extractall(unpack_dir)
+            cls._safe_extract_zip(archive, unpack_dir)
         source_dir = cls.locate_extracted_root(unpack_dir)
         return work_dir, source_dir

services/update_service.py

@@ -5,7 +5,42 @@ import urllib.error
 import urllib.request
 from urllib.parse import urlparse
 
-from PySide6.QtCore import QObject, Signal
+try:
+    from PySide6.QtCore import QObject, Signal
+except Exception:
+    class _FallbackBoundSignal:
+        def __init__(self):
+            self._callbacks = []
+
+        def connect(self, callback):
+            if callback is not None:
+                self._callbacks.append(callback)
+
+        def emit(self, *args, **kwargs):
+            for callback in list(self._callbacks):
+                callback(*args, **kwargs)
+
+    class _FallbackSignalDescriptor:
+        def __init__(self):
+            self._storage_name = ""
+
+        def __set_name__(self, owner, name):
+            self._storage_name = f"__fallback_signal_{name}"
+
+        def __get__(self, instance, owner):
+            if instance is None:
+                return self
+            signal = instance.__dict__.get(self._storage_name)
+            if signal is None:
+                signal = _FallbackBoundSignal()
+                instance.__dict__[self._storage_name] = signal
+            return signal
+
+    class QObject:
+        pass
+
+    def Signal(*_args, **_kwargs):
+        return _FallbackSignalDescriptor()
 
 
 def _version_key(version_text):