Vendor Tailwind via the standalone CLI; drop the Play CDN

Tailwind is now compiled from static/css/input.css into a committed static/css/tailwind.css by the standalone CLI, fetched on demand into bin/ (gitignored) so no Node toolchain is required. layout.templ loads the local stylesheet instead of cdn.tailwindcss.com. Adds a Makefile with generate/css/build/run/test/clean targets.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tailwind.config.js

@@ -0,0 +1,13 @@
+/** @type {import('tailwindcss').Config} */
+// Scans the .templ sources for utility classes. Custom v-* component classes
+// live in static/css/app.css, not here, so they need no safelisting. If a
+// utility class is ever built dynamically in Go rather than written as a
+// literal in a template, add it to `safelist` below.
+module.exports = {
+  content: ["./templates/**/*.templ"],
+  safelist: [],
+  theme: {
+    extend: {},
+  },
+  plugins: [],
+};