Add initial migrations, admin configurations, and base CSS for the project

static/css/colors_light.css

@@ -0,0 +1,14 @@
+/* Theme bridge (LIGHT) — 2025 design system
+   This file intentionally contains minimal overrides. The full palette,
+   components and tokens live in css/app.css using CSS variables.
+   Keeping this file ensures JS can swap theme stylesheets without FOUC. */
+
+/* Prefer light-friendly scrollbar & subtle touches without overriding tokens */
+html[data-theme='light'] {
+  color-scheme: light;
+}
+
+/* Optional: ensure nav backdrop looks crisp on light */
+nav.site-nav { 
+  background: var(--nav-bg);
+}