feat: update UI components and styles for improved user experience

- Removed obsolete PDF file from the mock directory.
- Updated index.html to change the favicon and title for the application.
- Deleted unused vite.svg file and replaced it with shapes.svg.
- Enhanced App component layout and styling.
- Refined Form1 component with better spacing and updated styles.
- Improved Form2 component to enhance item selection UI and responsiveness.
- Updated Form4 component to improve loan display and interaction.
- Enhanced Header component styling for better visibility.
- Refined LoginForm component for a more modern look.
- Updated Object component styles for better text visibility.
- Improved Sidebar component layout and item display.
- Updated global CSS for better touch target improvements.
- Enhanced Layout component for better responsiveness and structure.
- Updated main.tsx to change toast notification theme.
- Updated tailwind.config.js to include index.html for Tailwind CSS processing.

frontend/src/layout/Layout.tsx

@@ -10,28 +10,29 @@ type LayoutProps = {
 
 const Layout: React.FC<LayoutProps> = ({ children, onLogout }) => {
   return (
-    <div className="min-h-screen flex bg-gradient-to-r from-blue-50 via-white to-blue-100">
-      {/* Sidebar */}
-      <div className="hidden md:block">
-        <Sidebar />
-      </div>
-
+    <div className="min-h-screen flex bg-slate-50 text-slate-800">
       {/* Main */}
-      <main className="flex-1 flex flex-col items-center py-10 px-4 md:py-14">
-        <div className="w-full max-w-3xl">
-          <Header onLogout={onLogout} />
-        </div>
-        <div className="w-full max-w-3xl bg-white/90 shadow-2xl rounded-3xl p-6 md:p-10 ring-1 ring-blue-100">
-          {children}
+      <main className="flex-1 flex flex-col items-center px-3 sm:px-5 py-4 sm:py-8">
+        {/* Sidebar on mobile appears inline on top; on desktop it's a sticky column */}
+        <div className="w-full max-w-5xl md:flex md:gap-6">
+          <div className="block md:hidden mb-3">
+            <Sidebar />
+          </div>
+
+          <div className="hidden md:block md:shrink-0 md:w-72">
+            <Sidebar />
+          </div>
+
+          <div className="flex-1 min-w-0">
+            <div className="w-full">
+              <Header onLogout={onLogout} />
+            </div>
+            <div className="w-full bg-white shadow-md md:shadow-lg rounded-2xl p-4 sm:p-6 ring-1 ring-slate-200">
+              {children}
+            </div>
+          </div>
         </div>
       </main>
-
-      {/* Mobile sidebar at bottom */}
-      <div className="fixed bottom-4 left-4 right-4 md:hidden z-10">
-        <div className="bg-white/95 backdrop-blur rounded-2xl shadow-xl ring-1 ring-blue-100 p-4">
-          <Sidebar />
-        </div>
-      </div>
     </div>
   );
 };