feat: validate user availability

app/internal/templates/address.html

@@ -18,10 +18,10 @@
       <div class="flex flex-col sm:flex-row items-start sm:items-center gap-4 w-full sm:w-auto">
         <div class="flex items-center gap-2">
 
-          
+
 
         <button
-              class="px-6 py-2.5 bg-green-600 text-white text-sm font-medium hover:bg-green-700 transition-colors"
+              class="px-6 py-2.5 bg-green-600 text-white text-sm font-medium hover:bg-green-700 transition-colors rounded-lg"
               onclick="window.location.href='/addresses/upload-csv'"
             >
               <i class="fas fa-file-import mr-2"></i>Import Data
@@ -39,7 +39,7 @@
             <option value="100" {{if eq .Pagination.PageSize 100}}selected{{end}}>100</option>
           </select>
         </div>
-        
+
         <div class="flex items-center gap-2">
           <button
             onclick="goToPage({{.Pagination.PreviousPage}})"
@@ -67,7 +67,7 @@
   <!-- Table Container -->
   <div class="flex-1 p-4 md:p-6 overflow-auto">
     <div class="bg-white rounded-lg shadow-sm border border-gray-200 overflow-hidden">
-      
+
       <!-- Desktop Table -->
       <div class="hidden lg:block overflow-x-auto">
         <table class="w-full min-w-full">
@@ -141,8 +141,9 @@
                   <button
                     class="px-3 py-1 bg-gray-100 text-gray-500 text-sm rounded-md cursor-not-allowed"
                     disabled
+                    hidden
                   >
-                    Assigned
+                  <i class="fa-solid fa-plus text-orange-400"></i>
                   </button>
                   <form action="/remove_assigned_address" method="POST" class="inline-block">
                     <input type="hidden" name="address_id" value="{{ .AddressID }}" />
@@ -151,16 +152,17 @@
                       type="submit"
                       class="text-red-400 hover:text-red-600 p-1"
                       title="Remove assignment"
+
                     >
                       <i class="fas fa-trash"></i>
                     </button>
                   </form>
                   {{ else }}
                   <button
-                    class="px-3 py-1 bg-blue-500 text-white text-sm rounded-md hover:bg-blue-600 transition-colors"
+                    class="px-3 py-1 bg-blue-100 text-white text-sm rounded-md hover:bg-blue-600 transition-colors"
                     onclick="openAssignModal({{ .AddressID }}, '{{ .Address }}')"
                   >
-                    Assign
+                    <i class="fa-solid fa-plus text-blue-500"></i>
                   </button>
                   {{ end }}
                 </div>