Fix: Preserve decimal commas in numbers (e.g., 4443,445)

- Modified itemParser to detect commas between digits
- Prevents splitting money/numbers with comma decimal separators
- Example: '4443,445 gold coins' now stays as one item
- Added documentation and example for decimal comma handling

src/utils/itemParser.js

@@ -17,6 +17,7 @@ import { sanitizeItemName, MAX_ITEMS_PER_SECTION } from './security.js';
  * - Strips list markers: -, •, 1., 2., etc.
  * - Collapses newlines inside parentheses to spaces
  * - Only splits on commas OUTSIDE parentheses (preserves commas in descriptions)
+ * - Preserves commas in numbers (decimal separators like 4443,445)
  * - Gracefully handles unmatched parentheses
  *
  * @param {string} itemString - Item string from AI (various formats supported)
@@ -35,6 +36,10 @@ import { sanitizeItemName, MAX_ITEMS_PER_SECTION } from './security.js';
  * parseItems("Potato (Cursed, Sexy, Your Mum & Dick, Etc), Sword")
  * // → ["Potato (Cursed, Sexy, Your Mum & Dick, Etc)", "Sword"]
  *
+ * // Decimal commas in numbers (preserved)
+ * parseItems("4443,445 gold coins, Sword, 1,234,567 credits")
+ * // → ["4443,445 gold coins", "Sword", "1,234,567 credits"]
+ *
  * // Markdown formatting (stripped)
  * parseItems("**Sword** (equipped), *Shield*") // ["Sword (equipped)", "Shield"]
  *
@@ -125,7 +130,7 @@ export function parseItems(itemString) {
     // STEP 5: Normalize whitespace
     processed = processed.replace(/\s+/g, ' ');
 
-    // STEP 6: Smart comma splitting (only split on commas OUTSIDE parentheses)
+    // STEP 6: Smart comma splitting (only split on commas OUTSIDE parentheses and NOT in numbers)
     // Also handles list markers, quotes, and security validation per-item
     const items = [];
     let currentItem = '';
@@ -146,7 +151,16 @@ export function parseItems(itemString) {
             }
             currentItem += char;
         } else if (char === ',' && parenDepth === 0) {
-            // Comma outside parentheses - this is a separator
+            // Check if this comma is between digits (decimal separator like 4443,445)
+            const prevChar = i > 0 ? processed[i - 1] : '';
+            const nextChar = i < processed.length - 1 ? processed[i + 1] : '';
+            const isDecimalComma = /\d/.test(prevChar) && /\d/.test(nextChar);
+
+            if (isDecimalComma) {
+                // This is a decimal comma, not a separator - keep it
+                currentItem += char;
+            } else {
+                // Comma outside parentheses and not in a number - this is a separator
                 const cleaned = cleanSingleItem(currentItem);
                 if (cleaned) {
                     // Security check: validate and sanitize item name
@@ -162,6 +176,7 @@ export function parseItems(itemString) {
                     }
                 }
                 currentItem = ''; // Start new item
+            }
         } else {
             currentItem += char;
         }