Add customizable RPG attributes and fix character stats editing

Features:
- Made RPG attributes (STR/DEX/CON/INT/WIS/CHA) fully customizable
- Added enable/disable toggle for entire RPG Attributes section
- Users can add/remove/rename/toggle individual attributes
- Custom attribute names now appear in AI prompts for dice rolls
- Added proper CSS styling for attribute editor fields

Bug Fixes:
- Fixed character stat editing showing 0% on blur but saving correctly
- Character stats now create Stats line if missing from AI response
- Separated stat name from editable percentage value
- Added value sanitization (removes %, validates 0-100 range)
- Stats line now inserts before Thoughts line when created

Technical:
- Added buildAttributesString() helper in promptBuilder.js
- Updated generateTrackerInstructions and generateContextualSummary
- Restructured character stat HTML to prevent nested contenteditable
- Enhanced updateCharacterField to handle missing Stats lines
- Removed legacy default preset/regex import code

src/systems/generation/promptBuilder.js

@@ -56,6 +56,41 @@ export function buildInventorySummary(inventory) {
     return 'None';
 }
 
+/**
+ * Builds a dynamic attributes string based on configured RPG attributes.
+ * Uses custom attribute names and values from classicStats.
+ *
+ * @returns {string} Formatted attributes string (e.g., "STR 10, DEX 12, INT 15, LVL 5")
+ */
+function buildAttributesString() {
+    const trackerConfig = extensionSettings.trackerConfig;
+    const classicStats = extensionSettings.classicStats;
+    const userStatsConfig = trackerConfig?.userStats;
+
+    // Get enabled attributes from config
+    const rpgAttributes = userStatsConfig?.rpgAttributes || [
+        { id: 'str', name: 'STR', enabled: true },
+        { id: 'dex', name: 'DEX', enabled: true },
+        { id: 'con', name: 'CON', enabled: true },
+        { id: 'int', name: 'INT', enabled: true },
+        { id: 'wis', name: 'WIS', enabled: true },
+        { id: 'cha', name: 'CHA', enabled: true }
+    ];
+
+    const enabledAttributes = rpgAttributes.filter(attr => attr && attr.enabled && attr.name && attr.id);
+
+    // Build attributes string dynamically
+    const attributeParts = enabledAttributes.map(attr => {
+        const value = classicStats[attr.id] !== undefined ? classicStats[attr.id] : 10;
+        return `${attr.name} ${value}`;
+    });
+
+    // Add level at the end
+    attributeParts.push(`LVL ${extensionSettings.level}`);
+
+    return attributeParts.join(', ');
+}
+
 /**
  * Generates an example block showing current tracker states in markdown code blocks.
  * Uses COMMITTED data (not displayed data) for generation context.
@@ -250,7 +285,8 @@ export function generateTrackerInstructions(includeHtmlPrompt = true, includeCon
         // Include attributes and dice roll only if there was a dice roll
         if (extensionSettings.lastDiceRoll) {
             const roll = extensionSettings.lastDiceRoll;
-            instructions += `${userName}'s attributes: STR ${classicStats.str}, DEX ${classicStats.dex}, CON ${classicStats.con}, INT ${classicStats.int}, WIS ${classicStats.wis}, CHA ${classicStats.cha}, LVL ${extensionSettings.level}\n`;
+            const attributesString = buildAttributesString();
+            instructions += `${userName}'s attributes: ${attributesString}\n`;
             instructions += `${userName} rolled ${roll.total} on the last ${roll.formula} roll. Based on their attributes, decide whether they succeeded or failed the action they attempted.\n\n`;
         }
     }
@@ -327,9 +363,9 @@ export function generateContextualSummary() {
 
     // Include attributes and dice roll only if there was a dice roll
     if (extensionSettings.lastDiceRoll) {
-        const classicStats = extensionSettings.classicStats;
         const roll = extensionSettings.lastDiceRoll;
-        summary += `${userName}'s attributes: STR ${classicStats.str}, DEX ${classicStats.dex}, CON ${classicStats.con}, INT ${classicStats.int}, WIS ${classicStats.wis}, CHA ${classicStats.cha}, LVL ${extensionSettings.level}\n`;
+        const attributesString = buildAttributesString();
+        summary += `${userName}'s attributes: ${attributesString}\n`;
         summary += `${userName} rolled ${roll.total} on the last ${roll.formula} roll. Based on their attributes, decide whether they succeeded or failed the action they attempted.\n\n`;
     }