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/apps/applets/migrations/0008_game_kit_applets.py

@@ -0,0 +1,25 @@
+from django.db import migrations
+
+
+def seed_game_kit_applets(apps, schema_editor):
+    Applet = apps.get_model('applets', 'Applet')
+    for slug, name in [
+        ('gk-trinkets', 'Trinkets'),
+        ('gk-tokens', 'Tokens'),
+        ('gk-decks', 'Card Decks'),
+        ('gk-dice', 'Dice Sets'),
+    ]:
+        Applet.objects.get_or_create(
+            slug=slug,
+            defaults={'name': name, 'grid_cols': 3, 'grid_rows': 3, 'context': 'game-kit'},
+        )
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('applets', '0007_fix_billboard_applets'),
+    ]
+
+    operations = [
+        migrations.RunPython(seed_game_kit_applets, migrations.RunPython.noop)
+    ]