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/components/LoginForm.tsx

@@ -22,16 +22,16 @@ const LoginForm: React.FC<LoginFormProps> = ({ onLogin }) => {
   };
 
   return (
-    <div className="bg-blue-950 min-h-screen">
-      <div className="max-w-sm mx-auto mt-20 bg-white rounded-xl shadow-lg p-8 border border-blue-100">
-        <h2 className="text-2xl font-bold text-blue-700 mb-6 text-center">
+    <div className="min-h-screen flex items-center justify-center bg-slate-100 p-4">
+      <div className="w-full max-w-sm bg-white rounded-2xl shadow-md p-6 sm:p-8 border border-slate-200">
+        <h2 className="text-2xl font-bold text-slate-900 mb-6 text-center">
           Login
         </h2>
-        <form onSubmit={handleSubmit} className="space-y-5">
+        <form onSubmit={handleSubmit} className="space-y-4">
           <div>
             <label
               htmlFor="username"
-              className="block text-sm font-medium text-gray-700 mb-1"
+              className="block text-sm font-medium text-slate-700 mb-1"
             >
               Username
             </label>
@@ -39,14 +39,14 @@ const LoginForm: React.FC<LoginFormProps> = ({ onLogin }) => {
               type="text"
               onChange={(e) => setUsername(e.target.value)}
               id="username"
-              className="mt-1 block w-full border border-gray-300 rounded-md shadow-sm focus:ring-blue-500 focus:border-blue-500 px-3 py-2"
+              className="mt-1 block w-full border border-slate-300 rounded-md shadow-sm focus:ring-2 focus:ring-indigo-500 focus:border-indigo-500 px-3 py-2.5 bg-white"
               required
             />
           </div>
           <div>
             <label
               htmlFor="password"
-              className="block text-sm font-medium text-gray-700 mb-1"
+              className="block text-sm font-medium text-slate-700 mb-1"
             >
               Password
             </label>
@@ -54,13 +54,13 @@ const LoginForm: React.FC<LoginFormProps> = ({ onLogin }) => {
               onChange={(e) => setPassword(e.target.value)}
               type="password"
               id="password"
-              className="mt-1 block w-full border border-gray-300 rounded-md shadow-sm focus:ring-blue-500 focus:border-blue-500 px-3 py-2"
+              className="mt-1 block w-full border border-slate-300 rounded-md shadow-sm focus:ring-2 focus:ring-indigo-500 focus:border-indigo-500 px-3 py-2.5 bg-white"
               required
             />
           </div>
           <button
             type="submit"
-            className="w-full bg-blue-600 text-white font-bold py-2 px-4 rounded-md shadow hover:bg-blue-700 transition"
+            className="w-full bg-indigo-600 text-white font-bold py-2.5 px-4 rounded-md shadow hover:bg-indigo-700 transition"
           >
             Login
           </button>