chore: apply ruff formatting and fix whitespace issues

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

.github/instructions/frontend.instructions.md

@@ -22,13 +22,13 @@ These instructions apply to all files in the `frontend/` directory (templates, C
 {% block content %}
 <div class="container mx-auto px-4 py-8">
     <h1 class="text-2xl font-bold mb-4">{{ page_title }}</h1>
-    
+
     {% if error_message %}
     <div class="bg-red-100 border border-red-400 text-red-700 px-4 py-3 rounded mb-4">
         {{ error_message }}
     </div>
     {% endif %}
-    
+
     <form method="post" enctype="multipart/form-data">
         <!-- Form content -->
     </form>
@@ -72,9 +72,9 @@ These instructions apply to all files in the `frontend/` directory (templates, C
         <label class="block text-gray-700 text-sm font-bold mb-2" for="file">
             Document File
         </label>
-        <input 
-            type="file" 
-            id="file" 
+        <input
+            type="file"
+            id="file"
             name="file"
             class="w-full px-3 py-2 border rounded"
             required