Initial commit: extracted from impostor-bbs gems/bbs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/bbs/banner.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+require 'artii'
+
+module BBS
+  module Banner
+    def self.render(text, color: "\e[1;32m", padding: 2)
+      inner = "#{' ' * padding}#{text}#{' ' * padding}"
+      bar   = '═' * inner.length
+      rst   = "\e[0m"
+      "\r\n  #{color}╔#{bar}╗#{rst}\r\n" \
+      "  #{color}║#{inner}║#{rst}\r\n"   \
+      "  #{color}╚#{bar}╝#{rst}\r\n\r\n"
+    end
+
+    def self.render_big(text, color: "\e[1;32m", font: 'slant')
+      rst  = "\e[0m"
+      art  = Artii::Base.new(font: font).asciify(text)
+      lines = art.split("\n").map { |l| "  #{color}#{l}#{rst}" }
+      "\r\n#{lines.join("\r\n")}\r\n\r\n"
+    end
+  end
+end