Added minimum degree filter for graph queries

- Introduced min_degree parameter in graph query
- Updated UI to include minimum degree setting
- Modified API to handle min_degree parameter
- Updated graph query logic in LightRAG

lightrag_webui/src/components/graph/Settings.tsx

@@ -90,9 +90,12 @@ const LabeledNumberInput = ({
         {label}
       </label>
       <Input
-        value={currentValue || ''}
+        type="number"
+        value={currentValue === null ? '' : currentValue}
         onChange={onValueChange}
-        className="h-6 w-full min-w-0"
+        className="h-6 w-full min-w-0 pr-1"
+        min={min}
+        max={max}
         onBlur={onBlur}
         onKeyDown={(e) => {
           if (e.key === 'Enter') {
@@ -119,6 +122,7 @@ export default function Settings() {
   const enableHideUnselectedEdges = useSettingsStore.use.enableHideUnselectedEdges()
   const showEdgeLabel = useSettingsStore.use.showEdgeLabel()
   const graphQueryMaxDepth = useSettingsStore.use.graphQueryMaxDepth()
+  const graphMinDegree = useSettingsStore.use.graphMinDegree()
   const graphLayoutMaxIterations = useSettingsStore.use.graphLayoutMaxIterations()
 
   const enableHealthCheck = useSettingsStore.use.enableHealthCheck()
@@ -177,6 +181,11 @@ export default function Settings() {
     useSettingsStore.setState({ graphQueryMaxDepth: depth })
   }, [])
 
+  const setGraphMinDegree = useCallback((degree: number) => {
+    if (degree < 0) return
+    useSettingsStore.setState({ graphMinDegree: degree })
+  }, [])
+
   const setGraphLayoutMaxIterations = useCallback((iterations: number) => {
     if (iterations < 1) return
     useSettingsStore.setState({ graphLayoutMaxIterations: iterations })
@@ -266,6 +275,12 @@ export default function Settings() {
             value={graphQueryMaxDepth}
             onEditFinished={setGraphQueryMaxDepth}
           />
+          <LabeledNumberInput
+            label="Minimum Degree"
+            min={0}
+            value={graphMinDegree}
+            onEditFinished={setGraphMinDegree}
+          />
           <LabeledNumberInput
             label="Max Layout Iterations"
             min={1}