cookcli: build frontend assets

Add Node.js build dependency and npm build steps to compile
the Tailwind CSS frontend assets during installation. This
ensures the web server interface has all required static
files when installed via Homebrew.

The formula now:
- Installs npm dependencies with `npm ci`
- Builds CSS with `npm run build-css`
- Installs static assets to pkgshare directory

Author: dubadub

Formula/c/cookcli.rb

@@ -15,12 +15,19 @@ class Cookcli < Formula
     sha256 cellar: :any_skip_relocation, x86_64_linux:  "aa0f606df53567658253934322d581095af09b97572d5e1a7e4e9c48d97db52f"
   end
 
+  depends_on "node" => :build
   depends_on "rust" => :build
   depends_on "openssl@3"
 
   def install
     ENV["OPENSSL_NO_VENDOR"] = "1"
     ENV["OPENSSL_DIR"] = Formula["openssl@3"].opt_prefix
+
+    # Install npm dependencies and build CSS
+    system "npm", "install", *std_npm_args(prefix: false), "--ignore-scripts"
+    system "npm", "run", "build-css"
+
+    # Build and install the binary
     system "cargo", "install", *std_cargo_args
   end