Remove Bootstrap classes from property forms and 404 pages

Convert remaining high-priority views from Bootstrap to Tailwind:

Property views:
- _request_prop_info.html.erb: Convert panel/form-group to Tailwind
- not_found.html.erb: Convert container/row/col-* to centered layout

Error pages:
- page_not_found.html.erb: Add proper 404 styling with Tailwind

These views had Bootstrap grid classes (row, col-md-*, etc) but no
Bootstrap CSS loaded. Now properly styled with Tailwind CSS.

Note: Error views in app/views/pwb/errors/ already use Tailwind.

Part of Bootstrap deprecation cleanup (HIGH PRIORITY files complete).

Author: etewiah

app/views/pwb/page_not_found.html.erb

@@ -1,13 +1,16 @@
 <!-- MAIN CONTENT -->
-<section class="slice bg-white bb">
-  <div class="wp-section estate">
-    <div class="container">
-      <div class="row">
-        <div class="col-md-9" style="min-height:300px;">
-          <h2>
-            <%= t "pageNotFound" %>
-          </h2>
-        </div>
+<section class="min-h-screen flex items-center justify-center bg-gray-50">
+  <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
+    <div class="text-center">
+      <div class="bg-white shadow-md rounded-lg px-8 py-12">
+        <div class="text-6xl font-bold text-gray-300 mb-4">404</div>
+        <h2 class="text-3xl font-bold text-gray-900 mb-4">
+          <%= t "pageNotFound" %>
+        </h2>
+        <p class="text-gray-600 mb-6">
+          The page you're looking for doesn't exist or has been moved.
+        </p>
+        <%= link_to "← Back to Home", root_path, class: "inline-flex items-center px-4 py-2 border border-transparent text-sm font-medium rounded-md text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500" %>
       </div>
     </div>
   </div>

app/views/pwb/props/_request_prop_info.html.erb

@@ -1,50 +1,49 @@
-<div class="panel panel-default panel-sidebar-1">
-  <div class="panel-heading">
-    <h2>
+<div class="bg-white rounded-lg shadow-sm border border-gray-200 p-6">
+  <div class="mb-6">
+    <h2 class="text-xl font-semibold text-gray-900">
       <%= I18n.t("requestPropertyInfo") %>
     </h2>
   </div>
-  <div class="panel-body">
+  <div>
 
 <%= form_for :contact, :url => '/request_property_info.js', :method => 'post', 
-  :html => { :class => 'form-light mi_form' }, :remote => true do |f| %>
+  :html => { :class => 'space-y-4' }, :remote => true do |f| %>
 
-      <p style="display:none;">
+      <p class="hidden">
         <%= 'solicite_info' %>
       </p>
       <%=  f.hidden_field :locale, :value => I18n.locale %>
       <%=  f.hidden_field :property_id, :value => @property_details.id %>
 
-      <div class="form-group fila_form">
+      <div class="space-y-1">
 
         <%= simple_inmo_input f, "name", "name", "text", true %>
       </div>
-      <div class="form-group fila_form">
+      <div class="space-y-1">
         <%= simple_inmo_input f, "email", "email", "email", true %>
       </div>
 
-      <div class="form-group fila_form">
+      <div class="space-y-1">
         <%= simple_inmo_input f, "tel", "tel", "text", false %>
       </div>
 
-      <div class="form-group fila_form">
+      <div class="space-y-1">
         <%= simple_inmo_textarea f, "message", "message", "text", false %>
       </div>
 
-      <div class="row">
-        <div class="col-sm-12">
+      <div class="space-y-3">
+        <div>
           <div id="request-info-result"></div>
         </div>
-        <div class="col-sm-12">
-          <button type="submit" class="btn fondo_accion width100"><%= icon(:email, size: :sm) %>
-          <%= I18n.t("send") %>
+        <div>
+          <button type="submit" class="w-full flex items-center justify-center px-4 py-2 border border-transparent text-sm font-medium rounded-md text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500">
+            <%= icon(:email, size: :sm) %>
+            <span class="ml-2"><%= I18n.t("send") %></span>
           </button>
         </div>
       </div>
-      <div class="row">
-        <div class="col-sm-12">
-          <div id="resp_enviar"></div>
-        </div>
+      <div>
+        <div id="resp_enviar"></div>
       </div>
 <% end %>
 

app/views/pwb/props/not_found.html.erb

@@ -1,13 +1,15 @@
 <!-- MAIN CONTENT -->
-<section class="slice bg-white bb">
-  <div class="wp-section estate">
-    <div class="container">
-      <div class="row">
-        <div class="col-md-9" style="min-height:300px;">
-          <h2>
-            <%= t "propertyNotFound" %>
-          </h2>
-        </div>
+<section class="min-h-screen flex items-center justify-center bg-gray-50">
+  <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
+    <div class="text-center">
+      <div class="bg-white shadow-md rounded-lg px-8 py-12">
+        <h2 class="text-3xl font-bold text-gray-900 mb-4">
+          <%= t "propertyNotFound" %>
+        </h2>
+        <p class="text-gray-600 mb-6">
+          The property you're looking for doesn't exist or has been removed.
+        </p>
+        <%= link_to "← Back to Properties", root_path, class: "inline-flex items-center px-4 py-2 border border-transparent text-sm font-medium rounded-md text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500" %>
       </div>
     </div>
   </div>