chore: 项目文件结构重构

删除多个不再使用的源文件，包括动画、下载、配置、UI 相关文件及图标，清理代码库以提高可维护性。

source/workers/extraction_thread.py

@@ -0,0 +1,31 @@
+import os
+import shutil
+import py7zr
+from PySide6.QtCore import QThread, Signal
+from data.config import PLUGIN, GAME_INFO
+
+class ExtractionThread(QThread):
+    finished = Signal(bool, str, str)  # success, error_message, game_version
+
+    def __init__(self, _7z_path, game_folder, plugin_path, game_version, parent=None):
+        super().__init__(parent)
+        self._7z_path = _7z_path
+        self.game_folder = game_folder
+        self.plugin_path = plugin_path
+        self.game_version = game_version
+
+    def run(self):
+        try:
+            with py7zr.SevenZipFile(self._7z_path, mode="r") as archive:
+                archive.extractall(path=PLUGIN)
+            
+            os.makedirs(self.game_folder, exist_ok=True)
+            shutil.copy(self.plugin_path, self.game_folder)
+            
+            if self.game_version == "NEKOPARA After":
+                sig_path = os.path.join(PLUGIN, GAME_INFO[self.game_version]["sig_path"])
+                shutil.copy(sig_path, self.game_folder)
+                
+            self.finished.emit(True, "", self.game_version)
+        except (py7zr.Bad7zFile, FileNotFoundError, Exception) as e:
+            self.finished.emit(False, f"\n文件操作失败，请重试\n\n【错误信息】：{e}\n", self.game_version)