Refactor updater checks to use QThread for async operations

Replaces manual threading for FFmpeg and Deno version checks with dedicated QThread subclasses (FFmpegCheckThread and DenoCheckThread). This improves integration with the Qt event loop, enables use of signals and slots for UI updates, and enhances error handling.

src/gui/ytsage_gui_dialogs/ytsage_dialogs_updater.py

@@ -9,7 +9,7 @@ import threading
 from typing import Optional, Tuple, TYPE_CHECKING, cast
 
 import requests
-from PySide6.QtCore import Qt, Signal
+from PySide6.QtCore import Qt, Signal, QThread, Slot
 from PySide6.QtWidgets import (
     QCheckBox,
     QGroupBox,
@@ -157,6 +157,32 @@ def check_ffmpeg_version() -> Tuple[bool, str, str]:
         return False, "Error", "Error"
 
 
+class FFmpegCheckThread(QThread):
+    finished = Signal(bool, str, str)
+    error = Signal(str)
+
+    def run(self):
+        try:
+            update_available, current_version, latest_version = check_ffmpeg_version()
+            self.finished.emit(update_available, current_version, latest_version)
+        except Exception as e:
+            logger.exception(f"Error checking FFmpeg version: {e}")
+            self.error.emit(str(e))
+
+
+class DenoCheckThread(QThread):
+    finished = Signal(bool, str, str)
+    error = Signal(str)
+
+    def run(self):
+        try:
+            update_available, current_version, latest_version = check_deno_update()
+            self.finished.emit(update_available, current_version, latest_version)
+        except Exception as e:
+            logger.exception(f"Error checking Deno version: {e}")
+            self.error.emit(str(e))
+
+
 class UpdaterTabWidget(QWidget):
     """Widget for the Updater tab in Custom Options dialog."""
     
@@ -754,22 +780,20 @@ class UpdaterTabWidget(QWidget):
             "background-color: #2a2d36; border-radius: 4px; margin: 5px 0;"
         )
         
-        # Run check in background thread
-        def check_thread():
-            try:
-                update_available, current_version, latest_version = check_ffmpeg_version()
-                
-                # Update UI in main thread
-                self.check_button.setEnabled(True)
-                self._update_check_results(update_available, current_version, latest_version)
-                
-            except Exception as e:
-                logger.exception(f"Error checking FFmpeg version: {e}")
-                self.check_button.setEnabled(True)
-                self._show_check_error(str(e))
-        
-        thread = threading.Thread(target=check_thread, daemon=True)
-        thread.start()
+        self.ffmpeg_check_thread = FFmpegCheckThread()
+        self.ffmpeg_check_thread.finished.connect(self._on_ffmpeg_check_finished)
+        self.ffmpeg_check_thread.error.connect(self._on_ffmpeg_check_error)
+        self.ffmpeg_check_thread.start()
+
+    @Slot(bool, str, str)
+    def _on_ffmpeg_check_finished(self, update_available, current_version, latest_version):
+        self.check_button.setEnabled(True)
+        self._update_check_results(update_available, current_version, latest_version)
+
+    @Slot(str)
+    def _on_ffmpeg_check_error(self, error):
+        self.check_button.setEnabled(True)
+        self._show_check_error(error)
     
     def _update_check_results(self, update_available: bool, current_version: str, latest_version: str) -> None:
         """Handle completion of version check."""
@@ -819,22 +843,20 @@ class UpdaterTabWidget(QWidget):
             "background-color: #2a2d36; border-radius: 4px; margin: 5px 0;"
         )
         
-        # Run check in background thread
-        def check_thread():
-            try:
-                update_available, current_version, latest_version = check_deno_update()
-                
-                # Update UI in main thread
-                self.deno_check_button.setEnabled(True)
-                self._update_deno_check_results(update_available, current_version, latest_version)
-                
-            except Exception as e:
-                logger.exception(f"Error checking Deno version: {e}")
-                self.deno_check_button.setEnabled(True)
-                self._show_deno_check_error(str(e))
-        
-        thread = threading.Thread(target=check_thread, daemon=True)
-        thread.start()
+        self.deno_check_thread = DenoCheckThread()
+        self.deno_check_thread.finished.connect(self._on_deno_check_finished)
+        self.deno_check_thread.error.connect(self._on_deno_check_error)
+        self.deno_check_thread.start()
+
+    @Slot(bool, str, str)
+    def _on_deno_check_finished(self, update_available, current_version, latest_version):
+        self.deno_check_button.setEnabled(True)
+        self._update_deno_check_results(update_available, current_version, latest_version)
+
+    @Slot(str)
+    def _on_deno_check_error(self, error):
+        self.deno_check_button.setEnabled(True)
+        self._show_deno_check_error(error)
     
     def _update_deno_check_results(self, update_available: bool, current_version: str, latest_version: str) -> None:
         """Handle completion of Deno version check."""