Fix alert item name to use floatData.fullItemName like watchlist

ISSUE:
- Alerts showing 'CS2 Item' instead of actual item name
- Selector '.market_listing_largeimage .market_listing_item_name' not finding element

FIX:
1. showPriceAlertDialog now tries:
   - floatData.fullItemName (same as watchlist)
   - floatData.skinName
   - DOM selectors as fallback
   - document.title as final fallback

2. Quick alert path also improved with better selectors

Now matches watchlist implementation which successfully gets:
'AK-47 | Legion of Anubis (Field-Tested)'

Author: rainerstudios

content.js

@@ -1353,11 +1353,14 @@ function createFloatingAlertButton() {
       return;
     }
 
-    // Get item name from page
-    const itemNameElement = document.querySelector('.market_listing_largeimage .market_listing_item_name') ||
-                          document.querySelector('.market_listing_item_name') ||
-                          document.querySelector('h1');
-    const itemName = itemNameElement ? itemNameElement.textContent.trim() : 'Current Item';
+    // Get item name from page (try multiple selectors)
+    const itemName = document.querySelector('.market_listing_largeimage .market_listing_item_name')?.textContent.trim() ||
+                     document.querySelector('.market_listing_item_name')?.textContent.trim() ||
+                     document.title.split(' :: ')[0] ||
+                     document.querySelector('h1')?.textContent.trim() ||
+                     'Current Item';
+
+    console.log('[Quick Alert] Item name:', itemName);
 
     // Create mock float data for quick alerts
     const mockFloatData = {
@@ -1596,9 +1599,14 @@ function showPriceAlertDialog(floatData) {
   const existing = document.getElementById('cs2-price-alert-modal');
   if (existing) existing.remove();
 
-  // Get item name from page
-  const itemNameElement = document.querySelector('.market_listing_largeimage .market_listing_item_name');
-  const itemName = itemNameElement ? itemNameElement.textContent.trim() : 'CS2 Item';
+  // Get item name from floatData or page (same as watchlist does)
+  const itemName = floatData.fullItemName ||
+                   floatData.skinName ||
+                   document.querySelector('.market_listing_largeimage .market_listing_item_name')?.textContent.trim() ||
+                   document.title.split(' :: ')[0] ||
+                   'CS2 Item';
+
+  console.log('[Alert] Item name for alert:', itemName);
 
   // Create modal
   const modal = document.createElement('div');