game kit gear menu + login form UX polish; left-side position indicator flip

game kit: new Applet model rows (context=game-kit) for Trinkets, Tokens, Card Decks, Dice Sets via applets migration 0008; _game_kit_context() helper in gameboard.views; toggle_game_kit_sections view + URL; new _game_kit_sections.html (HTMX-swappable, visibility-conditional) + _game_kit_applet_menu.html partials; game_kit.html wired to gear btn + menu; Dice Sets now renders _forthcoming.html partial; 16 new green ITs in GameKitViewTest + ToggleGameKitSectionsViewTest

login form: .input-group now position:fixed + vertically centred (top:50%) across all breakpoints as default; landscape block reduced to left/right sidebar offsets only; form-control width 24rem, text-align:center; alert block moved below h2 in base.html; alert margin 0.75rem all sides; home.html header switches between Howdy Stranger (anon) and Dashboard (authed)

room.html position indicators: slots 3/4/5 (AC/SC/EC) column order flipped via SCSS data-slot selectors so .fa-chair sits table-side and label+status icon sit outward

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/templates/core/base.html

@@ -21,6 +21,14 @@
         <div class="container">
             {% include "core/_partials/_navbar.html" %}
 
+            <div class="row">
+                <div class="col-lg-6">
+                    <h2 >{% block header_text %}{% endblock header_text %}</h2>
+                    {% block extra_header %}
+                    {% endblock extra_header %}
+                </div>
+            </div>
+
             {% if messages %}
                 <div class="row">
                     <div class="col-md-12">
@@ -35,14 +43,6 @@
                 </div>
             {% endif %}
 
-            <div class="row">
-                <div class="col-lg-6">
-                    <h2 >{% block header_text %}{% endblock header_text %}</h2>
-                    {% block extra_header %}
-                    {% endblock extra_header %}
-                </div>
-            </div>
-
             {% block content %}
             {% endblock content %}