fix(dashboard): prevent resize handle overlap and clipping

- Change .rpg-widget overflow from hidden to visible to prevent handle clipping
- Reduce horizontal handle offset from -6px to -3px to prevent overlap
- Keep vertical offset at -6px (adequate gap between rows)
- Handles now have 6px clearance when widgets are side-by-side (12px gap - 3px - 3px)

style.css

@@ -1189,7 +1189,7 @@ body:has(.rpg-panel.rpg-position-left) #sheld {
 /* Base widget container - ensures content stays within bounds */
 .rpg-widget {
     box-sizing: border-box;
-    overflow: hidden;
+    overflow: visible; /* Allow resize handles to extend beyond widget bounds */
     display: flex;
     flex-direction: column;