style: align client with NHCarrigan style guide

- Remove shared stylesheet stripping; let headers/index.js apply the
  witch palette, Griffy/Kalam fonts, and mystical backgrounds
- Replace custom CSS vars and Vampyr font with style guide tokens
- Update all component CSS to use witch palette variables
- Fix sanctions sort to descending by case number
- Update Hikari image URLs to cdn.nhcarrigan.com/hikari.png

client/src/app/products/products.html

@@ -1,8 +1,9 @@
 <h1>Products</h1>
 <img
-  src="https://cdn.nhcarrigan.com/new-avatars/hikari-thinking-full.png"
+  src="https://cdn.nhcarrigan.com/hikari.png"
   alt="Hikari"
   height="250"
+  style="display: block; margin: auto;"
 />
 <p>Excellent! What sort of product are you looking for?</p>
 <div class="row">