fix(hud): reset Shrapnel counter on non-Shrapnel loot

- Non-Shrapnel loot = 1 kill AND reset Shrapnel counter
- Prevents overcounting when mob drops Shrapnel + Oil
- Shrapnel counted as 1 kill per 2 pieces

ui/main_window.py

@@ -962,10 +962,13 @@ class MainWindow(QMainWindow):
                 return
             
             # Kill tracking heuristic:
-            # - Non-Shrapnel loot = definite kill
-            # - Shrapnel: count as kill every 2 Shrapnel (since mobs drop 1-2 Shrapnel)
+            # - Non-Shrapnel loot = definite kill (reset Shrapnel counter)
+            # - Shrapnel: count as kill every 2 Shrapnel
             if item_name != 'Shrapnel':
+                # Real loot = 1 kill, and reset Shrapnel counter
+                # (The Shrapnel we collected belongs to this kill)
                 self.hud.update_stats({'kills_add': 1})
+                self._shrapnel_count = 0
             else:
                 # Track Shrapnel count for this session
                 if not hasattr(self, '_shrapnel_count'):