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/profile/profile-item.tsx

@@ -315,7 +315,7 @@ export const ProfileItem = (props: Props) => {
       // 更新成功，刷新列表
       showNotice("success", t("Update subscription successfully"));
       mutate("getProfiles");
-    } catch (err: any) {
+    } catch {
       // 更新完全失败（包括后端的回退尝试）
       // 不需要做处理，后端会通过事件通知系统发送错误
     } finally {