Adjust force-directed layout parameters for better stability

lightrag_webui/src/components/graph/LayoutsControl.tsx

@@ -218,8 +218,8 @@ const LayoutsControl = () => {
     maxIterations: maxIterations,
     settings: {
       attraction: 0.0003,  // Lower attraction force to reduce oscillation
-      repulsion: 0.01,     // Lower repulsion force to reduce oscillation
-      gravity: 0.01,      // Increase gravity to make nodes converge to center faster
+      repulsion: 0.02,     // Lower repulsion force to reduce oscillation
+      gravity: 0.02,      // Increase gravity to make nodes converge to center faster
       inertia: 0.4,        // Lower inertia to add damping effect
       maxMove: 100         // Limit maximum movement per step to prevent large jumps
     }