- Update project SDK to Python 3.13.

- Refactor main.py for improved readability, type-hinting, and UI enhancements using `ttk` widgets.
- Adjust `.idea` configuration for compatibility with updated SDK.

.idea/Autoclicker.iml

@@ -4,7 +4,7 @@
     <content url="file://$MODULE_DIR$">
       <excludeFolder url="file://$MODULE_DIR$/.venv" />
     </content>
-    <orderEntry type="jdk" jdkName="Python 3.11 (Autoclicker)" jdkType="Python SDK" />
+    <orderEntry type="jdk" jdkName="Python 3.13" jdkType="Python SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
 </module>

.idea/misc.xml

@@ -3,4 +3,5 @@
   <component name="Black">
     <option name="sdkName" value="Python 3.11 (Autoclicker)" />
   </component>
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.13" project-jdk-type="Python SDK" />
 </project>