fix: Remove unused variables to resolve ESLint errors

🔧 ESLint Fixes:
- Remove unused 'categoryConfig' variable in Layout.js (line 167)
- Remove unused 'isHome' variable in ToolSidebar.js (line 77)
- Remove unused 'Sparkles' import in tools.js (line 1)

✅ Build Status:
- All ESLint errors resolved
- Build now compiles successfully
- Ready for deployment

📁 Files Modified:
- /src/components/Layout.js - Removed unused categoryConfig for NON_TOOLS
- /src/components/ToolSidebar.js - Removed unused isHome for NON_TOOLS
- /src/config/tools.js - Removed unused Sparkles import

src/components/Layout.js

@@ -164,7 +164,6 @@ const Layout = ({ children }) => {
               {/* Non-Tools Section */}
               {NON_TOOLS.map((tool) => {
                 const IconComponent = tool.icon;
-                const categoryConfig = getCategoryConfig(tool.category);
                 
                 return (
                   <Link

src/components/ToolSidebar.js

@@ -74,7 +74,6 @@ const ToolSidebar = () => {
             {filteredNonTools.map((tool) => {
               const IconComponent = tool.icon;
               const isActiveItem = isActive(tool.path);
-              const isHome = tool.path === '/';
               
               return (
                 <Link

src/config/tools.js

@@ -1,4 +1,4 @@
-import { Edit3, Table, LinkIcon, Hash, Wand2, GitCompare, Type, Home, Sparkles, Zap } from 'lucide-react';
+import { Edit3, Table, LinkIcon, Hash, Wand2, GitCompare, Type, Home, Zap } from 'lucide-react';
 
 // Master tools configuration - single source of truth
 export const TOOL_CATEGORIES = {