new FT test_theme for theme switcher functionality; theme-switcher content added to home.html, several dashboard views & urls, all appropriate ITs & UTs; lyric user model saves theme (migrations run); django-compressor and django-libsass libraries added to dependencies

src/apps/dashboard/views.py

@@ -7,6 +7,9 @@ from .models import Item, List
 from apps.lyric.models import User
 
 
+UNLOCKED_THEMES = frozenset(["theme-default"])
+
+
 def home_page(request):
     return render(request, "apps/dashboard/home.html", {"form": ItemForm()})
 
@@ -59,3 +62,13 @@ def share_list(request, list_id):
         pass
     messages.success(request, "An invite has been sent if that address is registered.")
     return redirect(our_list)
+
+def set_theme(request):
+    if not request.user.is_authenticated:
+        return redirect("home")
+    if request.method == "POST":
+        theme = request.POST.get("theme", "")
+        if theme in UNLOCKED_THEMES:
+            request.user.theme = theme
+            request.user.save(update_fields=["theme"])
+    return redirect("home")