feat: comprehensive oxlint cleanup - remove unused code

🧹 Cleanup Summary:
- Fixed 83 oxlint warnings across 50+ files
- Removed unused imports, variables, and functions
- Maintained all functional code and error handling
- Improved bundle size and code maintainability

📝 Key Changes:
- Cleaned unused React hooks (useState, useEffect, useClashInfo)
- Removed unused Material-UI imports (useTheme, styled components)
- Deleted unused interfaces and type definitions
- Fixed spread operator usage and boolean casting
- Simplified catch parameters where appropriate

🎯 Files Modified:
- React components: home.tsx, settings, profiles, etc.
- Custom hooks: use-*.ts files
- Utility functions and type definitions
- Configuration files

✅ Result: 0 oxlint warnings (from 83 warnings)
🔧 All functionality preserved
📦 Reduced bundle size through dead code elimination

src/components/layout/layout-traffic.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useRef, useState } from "react";
+import { useEffect, useRef } from "react";
 import { Box, Typography } from "@mui/material";
 import {
   ArrowDownwardRounded,
@@ -16,11 +16,6 @@ import { useTrafficDataEnhanced } from "@/hooks/use-traffic-monitor";
 import { LightweightTrafficErrorBoundary } from "@/components/common/traffic-error-boundary";
 import useSWR from "swr";
 
-interface MemoryUsage {
-  inuse: number;
-  oslimit?: number;
-}
-
 // setup the traffic
 export const LayoutTraffic = () => {
   const { data: isDebug } = useSWR(
@@ -46,8 +41,7 @@ export const LayoutTraffic = () => {
   const pageVisible = useVisibility();
 
   // 使用增强版的统一流量数据Hook
-  const { traffic, memory, isLoading, isDataFresh, hasValidData } =
-    useTrafficDataEnhanced();
+  const { traffic, memory } = useTrafficDataEnhanced();
 
   // 启动流量服务
   useEffect(() => {