Make RPG attributes (STR/DEX/etc) customizable and editable

- Replace showRPGAttributes boolean with rpgAttributes array in trackerConfig
- Add RPG Attributes section in Edit Trackers with add/remove/rename/toggle
- Dynamically generate attribute display from config in userStats.js
- Add migration from old showRPGAttributes to new rpgAttributes array
- Initialize new attributes with default value of 10 in classicStats
- Default attributes: STR, DEX, CON, INT, WIS, CHA (all enabled)

index.js

@@ -118,6 +118,9 @@ import { ensureHtmlCleaningRegex, detectConflictingRegexScripts } from './src/sy
 import { setupMemoryRecollectionButton, updateMemoryRecollectionButton } from './src/systems/features/memoryRecollection.js';
 import { initLorebookLimiter } from './src/systems/features/lorebookLimiter.js';
 
+// Utility modules
+import { importAllDefaults } from './src/utils/importDefaults.js';
+
 // Integration modules
 import {
     commitTrackerData,
@@ -601,6 +604,14 @@ jQuery(async () => {
             // Non-critical - continue anyway
         }
 
+        // Import default preset and regexes if user doesn't have them
+        try {
+            await importAllDefaults();
+        } catch (error) {
+            console.error('[RPG Companion] Failed to import defaults:', error);
+            // Non-critical - continue anyway
+        }
+
         // Register all event listeners
         try {
             registerAllEvents({