Add SettingsDisplay component to show graph settings

- Create SettingsDisplay component
- Display graphQueryMaxDepth and graphMinDegree
- Position display at bottom-left corner

lightrag_webui/src/components/graph/SettingsDisplay.tsx

@@ -0,0 +1,19 @@
+import { useSettingsStore } from '@/stores/settings'
+
+/**
+ * Component that displays current values of important graph settings
+ * Positioned to the right of the toolbar at the bottom-left corner
+ */
+const SettingsDisplay = () => {
+  const graphQueryMaxDepth = useSettingsStore.use.graphQueryMaxDepth()
+  const graphMinDegree = useSettingsStore.use.graphMinDegree()
+
+  return (
+    <div className="absolute bottom-2 left-[calc(2rem+2.5rem)] flex items-center gap-2 text-xs text-gray-400">
+      <div>Depth: {graphQueryMaxDepth}</div>
+      <div>Degree: {graphMinDegree}</div>
+    </div>
+  )
+}
+
+export default SettingsDisplay