diff --git a/lightrag_webui/package.json b/lightrag_webui/package.json
index 6016174c..7ed9ffcb 100644
--- a/lightrag_webui/package.json
+++ b/lightrag_webui/package.json
@@ -8,105 +8,98 @@
     "build": "bunx --bun vite build",
     "lint": "eslint .",
     "preview": "bunx --bun vite preview",
-    "test": "bun test",
-    "test:watch": "bun test --watch",
-    "test:coverage": "bun test --coverage",
     "dev-no-bun": "vite",
     "build-no-bun": "vite build --emptyOutDir",
     "preview-no-bun": "vite preview"
   },
   "dependencies": {
-    "@faker-js/faker": "^9.9.0",
-    "@radix-ui/react-alert-dialog": "^1.1.15",
-    "@radix-ui/react-checkbox": "^1.3.3",
-    "@radix-ui/react-dialog": "^1.1.15",
-    "@radix-ui/react-popover": "^1.1.15",
-    "@radix-ui/react-progress": "^1.1.8",
-    "@radix-ui/react-scroll-area": "^1.2.10",
-    "@radix-ui/react-select": "^2.2.6",
-    "@radix-ui/react-separator": "^1.1.8",
-    "@radix-ui/react-slot": "^1.2.4",
-    "@radix-ui/react-tabs": "^1.1.13",
-    "@radix-ui/react-tooltip": "^1.2.8",
-    "@radix-ui/react-use-controllable-state": "^1.2.2",
-    "@react-sigma/core": "^5.0.4",
-    "@react-sigma/graph-search": "^5.0.4",
-    "@react-sigma/layout-circlepack": "^5.0.4",
-    "@react-sigma/layout-circular": "^5.0.4",
-    "@react-sigma/layout-force": "^5.0.4",
-    "@react-sigma/layout-forceatlas2": "^5.0.4",
-    "@react-sigma/layout-noverlap": "^5.0.4",
-    "@react-sigma/layout-random": "^5.0.4",
-    "@react-sigma/minimap": "^5.0.5",
+    "@faker-js/faker": "^9.5.0",
+    "@radix-ui/react-alert-dialog": "^1.1.6",
+    "@radix-ui/react-checkbox": "^1.1.4",
+    "@radix-ui/react-dialog": "^1.1.6",
+    "@radix-ui/react-popover": "^1.1.6",
+    "@radix-ui/react-progress": "^1.1.2",
+    "@radix-ui/react-scroll-area": "^1.2.3",
+    "@radix-ui/react-select": "^2.1.6",
+    "@radix-ui/react-separator": "^1.1.2",
+    "@radix-ui/react-slot": "^1.1.2",
+    "@radix-ui/react-tabs": "^1.1.3",
+    "@radix-ui/react-tooltip": "^1.1.8",
+    "@radix-ui/react-use-controllable-state": "^1.1.0",
+    "@react-sigma/core": "^5.0.2",
+    "@react-sigma/graph-search": "^5.0.3",
+    "@react-sigma/layout-circlepack": "^5.0.2",
+    "@react-sigma/layout-circular": "^5.0.2",
+    "@react-sigma/layout-force": "^5.0.2",
+    "@react-sigma/layout-forceatlas2": "^5.0.2",
+    "@react-sigma/layout-noverlap": "^5.0.2",
+    "@react-sigma/layout-random": "^5.0.2",
+    "@react-sigma/minimap": "^5.0.2",
     "@sigma/edge-curve": "^3.1.0",
     "@sigma/node-border": "^3.0.0",
-    "@tanstack/react-table": "^8.21.3",
-    "axios": "^1.13.2",
+    "axios": "^1.7.9",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
-    "cmdk": "^1.1.1",
+    "cmdk": "^1.0.4",
     "graphology": "^0.26.0",
     "graphology-generators": "^0.11.2",
     "graphology-layout": "^0.6.1",
     "graphology-layout-force": "^0.2.4",
     "graphology-layout-forceatlas2": "^0.10.1",
     "graphology-layout-noverlap": "^0.4.2",
-    "i18next": "^25.6.3",
-    "katex": "^0.16.25",
-    "mermaid": "^11.12.1",
-    "lucide-react": "^0.554.0",
-    "minisearch": "^7.2.0",
-    "react": "^19.2.0",
-    "react-dom": "^19.2.0",
-    "react-dropzone": "^14.3.8",
-    "react-error-boundary": "^6.0.0",
-    "react-i18next": "^16.2.3",
+    "i18next": "^24.2.2",
+    "katex": "^0.16.22",
+    "lucide-react": "^0.475.0",
+    "mermaid": "^11.9.0",
+    "minisearch": "^7.1.2",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0",
+    "react-dropzone": "^14.3.6",
+    "react-error-boundary": "^5.0.0",
+    "react-i18next": "^15.4.1",
     "react-markdown": "^9.1.0",
-    "react-number-format": "^5.4.4",
-    "react-router-dom": "^7.9.6",
+    "react-number-format": "^5.4.3",
+    "react-router-dom": "^7.3.0",
     "react-select": "^5.10.2",
-    "react-syntax-highlighter": "^15.6.6",
+    "react-syntax-highlighter": "^15.6.1",
     "rehype-katex": "^7.0.1",
-    "rehype-raw": "^7.0.0",
     "rehype-react": "^8.0.0",
     "remark-gfm": "^4.0.1",
     "remark-math": "^6.0.0",
     "seedrandom": "^3.0.5",
-    "sigma": "^3.0.2",
+    "sigma": "^3.0.1",
     "sonner": "^1.7.4",
-    "tailwind-merge": "^3.4.0",
-    "tailwind-scrollbar": "^4.0.2",
+    "tailwind-merge": "^3.0.2",
+    "tailwind-scrollbar": "^4.0.1",
     "typography": "^0.16.24",
-    "unist-util-visit": "^5.0.0",
-    "zustand": "^5.0.8"
+    "zustand": "^5.0.3"
   },
   "devDependencies": {
-    "@eslint/js": "^9.39.1",
-    "@stylistic/eslint-plugin-js": "^4.4.1",
-    "@types/bun": "^1.3.3",
-    "@tailwindcss/vite": "^4.1.17",
+    "@eslint/js": "^9.21.0",
+    "@stylistic/eslint-plugin-js": "^3.1.0",
+    "@tailwindcss/vite": "^4.0.8",
+    "@types/bun": "^1.2.3",
     "@types/katex": "^0.16.7",
-    "@types/node": "^22.18.9",
-    "@tailwindcss/typography": "^0.5.15",
-    "@types/react": "^19.2.7",
-    "@types/react-dom": "^19.2.3",
+    "@types/node": "^22.13.5",
+    "@types/react": "^19.0.10",
+    "@types/react-dom": "^19.0.4",
     "@types/react-i18next": "^8.1.0",
     "@types/react-syntax-highlighter": "^15.5.13",
     "@types/seedrandom": "^3.0.8",
-    "@vitejs/plugin-react-swc": "^4.2.2",
-    "eslint": "^9.39.1",
-    "eslint-config-prettier": "^10.1.8",
-    "eslint-plugin-react": "^7.37.5",
-    "eslint-plugin-react-hooks": "^7.0.1",
-    "eslint-plugin-react-refresh": "^0.4.24",
-    "globals": "^16.5.0",
+    "@vitejs/plugin-react-swc": "^3.8.0",
+    "eslint": "^9.21.0",
+    "eslint-config-prettier": "^10.0.1",
+    "eslint-plugin-react": "^7.37.4",
+    "eslint-plugin-react-hooks": "^5.1.0",
+    "eslint-plugin-react-refresh": "^0.4.19",
+    "globals": "^15.15.0",
     "graphology-types": "^0.24.8",
-    "prettier": "^3.6.2",
-    "prettier-plugin-tailwindcss": "^0.7.1",
-    "typescript-eslint": "^8.48.0",
-    "tailwindcss": "^4.1.17",
+    "prettier": "^3.5.2",
+    "prettier-plugin-tailwindcss": "^0.6.11",
+    "tailwindcss": "^4.0.8",
     "tailwindcss-animate": "^1.0.7",
-    "typescript": "~5.9.3",
-    "vite": "^7.1.12"
+    "typescript": "~5.7.3",
+    "typescript-eslint": "^8.24.1",
+    "vite": "^6.1.1"
   }
 }
diff --git a/lightrag_webui/src/components/graph/GraphControl.tsx b/lightrag_webui/src/components/graph/GraphControl.tsx
index 20d6d603..6d040c47 100644
--- a/lightrag_webui/src/components/graph/GraphControl.tsx
+++ b/lightrag_webui/src/components/graph/GraphControl.tsx
@@ -2,7 +2,7 @@ import { useRegisterEvents, useSetSettings, useSigma } from '@react-sigma/core'
 import { AbstractGraph } from 'graphology-types'
 // import { useLayoutCircular } from '@react-sigma/layout-circular'
 import { useLayoutForceAtlas2 } from '@react-sigma/layout-forceatlas2'
-import { useEffect } from 'react'
+import { useEffect, useState } from 'react'
 
 // import useRandomGraph, { EdgeType, NodeType } from '@/hooks/useRandomGraph'
 import { EdgeType, NodeType } from '@/hooks/useLightragGraph'
@@ -43,6 +43,20 @@ const GraphControl = ({ disableHoverEffect }: { disableHoverEffect?: boolean })
   const selectedEdge = useGraphStore.use.selectedEdge()
   const focusedEdge = useGraphStore.use.focusedEdge()
   const sigmaGraph = useGraphStore.use.sigmaGraph()
+  
+  // Track system theme changes when theme is set to 'system'
+  const [systemThemeIsDark, setSystemThemeIsDark] = useState(() => 
+    window.matchMedia('(prefers-color-scheme: dark)').matches
+  )
+  
+  useEffect(() => {
+    if (theme === 'system') {
+      const mediaQuery = window.matchMedia('(prefers-color-scheme: dark)')
+      const handler = (e: MediaQueryListEvent) => setSystemThemeIsDark(e.matches)
+      mediaQuery.addEventListener('change', handler)
+      return () => mediaQuery.removeEventListener('change', handler)
+    }
+  }, [theme])
 
   /**
    * When component mount or maxIterations changes
@@ -204,7 +218,9 @@ const GraphControl = ({ disableHoverEffect }: { disableHoverEffect?: boolean })
    * => Setting the sigma reducers
    */
   useEffect(() => {
-    const isDarkTheme = theme === 'dark'
+    // Check if dark mode is actually applied (handles both 'dark' theme and 'system' theme when OS is dark)
+    const isDarkTheme = theme === 'dark' || 
+      (theme === 'system' && window.document.documentElement.classList.contains('dark'))
     const labelColor = isDarkTheme ? Constants.labelColorDarkTheme : undefined
     const edgeColor = isDarkTheme ? Constants.edgeColorDarkTheme : undefined
 
@@ -329,6 +345,7 @@ const GraphControl = ({ disableHoverEffect }: { disableHoverEffect?: boolean })
     sigma,
     disableHoverEffect,
     theme,
+    systemThemeIsDark,
     hideUnselectedEdges,
     enableEdgeEvents,
     renderEdgeLabels,
diff --git a/lightrag_webui/src/components/graph/Settings.tsx b/lightrag_webui/src/components/graph/Settings.tsx
index 37a36305..41da2f22 100644
--- a/lightrag_webui/src/components/graph/Settings.tsx
+++ b/lightrag_webui/src/components/graph/Settings.tsx
@@ -7,8 +7,10 @@ import Input from '@/components/ui/Input'
 
 import { controlButtonVariant } from '@/lib/constants'
 import { useSettingsStore } from '@/stores/settings'
+import { useGraphStore } from '@/stores/graph'
+import useRandomGraph from '@/hooks/useRandomGraph'
 
-import { SettingsIcon, Undo2 } from 'lucide-react'
+import { SettingsIcon, Undo2, Shuffle } from 'lucide-react'
 import { useTranslation } from 'react-i18next';
 
 /**
@@ -163,6 +165,9 @@ export default function Settings() {
 
   const enableHealthCheck = useSettingsStore.use.enableHealthCheck()
 
+  // Random graph functionality for development/testing
+  const { randomGraph } = useRandomGraph()
+
   const setEnableNodeDrag = useCallback(
     () => useSettingsStore.setState((pre) => ({ enableNodeDrag: !pre.enableNodeDrag })),
     []
@@ -228,6 +233,11 @@ export default function Settings() {
     useSettingsStore.setState({ graphLayoutMaxIterations: iterations })
   }, [])
 
+  const handleGenerateRandomGraph = useCallback(() => {
+    const graph = randomGraph()
+    useGraphStore.getState().setSigmaGraph(graph)
+  }, [randomGraph])
+
   const { t } = useTranslation();
 
   const saveSettings = () => setOpened(false);
@@ -376,6 +386,24 @@ export default function Settings() {
               defaultValue={15}
               onEditFinished={setGraphLayoutMaxIterations}
             />
+            <Separator />
+            
+            {/* Development/Testing Section */}
+            <div className="flex flex-col gap-2">
+              <label className="text-sm leading-none font-medium text-muted-foreground">
+                Development
+              </label>
+              <Button
+                onClick={handleGenerateRandomGraph}
+                variant="outline"
+                size="sm"
+                className="flex items-center gap-2"
+              >
+                <Shuffle className="h-3.5 w-3.5" />
+                Generate Random Graph
+              </Button>
+            </div>
+
             <Separator />
             <Button
               onClick={saveSettings}
diff --git a/lightrag_webui/src/hooks/useRandomGraph.tsx b/lightrag_webui/src/hooks/useRandomGraph.tsx
index c022bab8..6bc0a1a2 100644
--- a/lightrag_webui/src/hooks/useRandomGraph.tsx
+++ b/lightrag_webui/src/hooks/useRandomGraph.tsx
@@ -56,6 +56,16 @@ const useRandomGraph = () => {
         image: faker.image.urlLoremFlickr()
       })
     })
+    
+    // Add edge attributes
+    graph.edges().forEach((edge: string) => {
+      graph.mergeEdgeAttributes(edge, {
+        label: faker.lorem.words(faker.number.int({ min: 1, max: 3 })),
+        size: faker.number.float({ min: 1, max: 5 }),
+        color: randomColor()
+      })
+    })
+    
     return graph as Graph<NodeType, EdgeType>
   }, [faker])
 
diff --git a/lightrag_webui/src/lib/constants.ts b/lightrag_webui/src/lib/constants.ts
index 3d089281..d1efcc2e 100644
--- a/lightrag_webui/src/lib/constants.ts
+++ b/lightrag_webui/src/lib/constants.ts
@@ -1,55 +1,24 @@
 import { ButtonVariantType } from '@/components/ui/Button'
 
-// Get backend URL from environment variable, or construct it from window location
-const getBackendUrl = (): string => {
-  // First try environment variable
-  if (import.meta.env.VITE_API_BASE_URL) {
-    return import.meta.env.VITE_API_BASE_URL
-  }
-  
-  // Try to construct from current location if we're behind a reverse proxy
-  if (typeof window !== 'undefined') {
-    const protocol = window.location.protocol
-    const host = window.location.host
-    // Assume API is at :9621 on same host (standard dev port), or check if specified in environment
-    return `${protocol}//${host.split(':')[0]}:9621`
-  }
-  
-  // Fallback to localhost on port 9621 (standard development port)
-  return 'http://localhost:9621'
-}
-
-export const backendBaseUrl = getBackendUrl()
-export const webuiPrefix = '/'
+export const backendBaseUrl = ''
+export const webuiPrefix = '/webui/'
 
 export const controlButtonVariant: ButtonVariantType = 'ghost'
 
-export const labelColorDarkTheme = '#B2EBF2'
-export const labelColorLightTheme = '#000'
-export const LabelColorHighlightedDarkTheme = '#000'
+export const labelColorDarkTheme = '#FFFFFF'
+export const LabelColorHighlightedDarkTheme = '#000000'
 
 export const nodeColorDisabled = '#E2E2E2'
 export const nodeBorderColor = '#EEEEEE'
 export const nodeBorderColorSelected = '#F57F17'
 
-export const edgeColorDarkTheme = '#969696'
+export const edgeColorDarkTheme = '#888888'
 export const edgeColorSelected = '#F57F17'
-export const edgeColorHighlighted = '#B2EBF2'
+export const edgeColorHighlighted = '#FFFFFF'
 
 export const searchResultLimit = 50
 export const labelListLimit = 100
 
-// Search History Configuration
-export const searchHistoryMaxItems = 500
-export const searchHistoryVersion = '1.0'
-
-// API Request Limits
-export const popularLabelsDefaultLimit = 300
-export const searchLabelsDefaultLimit = 50
-
-// UI Display Limits
-export const dropdownDisplayLimit = 300
-
 export const minNodeSize = 4
 export const maxNodeSize = 20