chore(settings): update Claude Code preferred location and remove ruler setting

- Changed the preferred location for Claude Code from 'panel' to 'sidebar'.
- Removed the ruler setting for 72 from the editor configuration.

settings.json

@@ -130,7 +130,7 @@
   // Extension:
   // - https://marketplace.visualstudio.com/items?itemName=anthropic.claude-code
   //
-  "claudeCode.preferredLocation": "panel",
+  "claudeCode.preferredLocation": "sidebar",
   //
   // ===========================================================================
   // MARK: Editor
@@ -158,7 +158,6 @@
   //
   // Rulers
   "editor.rulers": [
-    72,
     80,
     100,
     120