fix: web client styling and nav updates (#21)

## Summary

- Aligns the client with the NHCarrigan style guide (witch palette, Griffy/Kalam fonts, shared stylesheet)
- Fixes sanctions page to sort by case number descending
- Updates all Hikari image URLs to `cdn.nhcarrigan.com/hikari.png`
- Adds Support link to nav (https://support.nhcarrigan.com)
- Fixes Chat nav link to point to https://chat.nhcarrigan.com

✨ This issue was created with help from Hikari~ 🌸

Reviewed-on: #21
Co-authored-by: Hikari <hikari@nhcarrigan.com>
Co-committed-by: Hikari <hikari@nhcarrigan.com>

client/src/app/home/home.html

@@ -1,8 +1,9 @@
 <h1>Hi there, I'm Hikari~!</h1>
 <img
-  src="https://cdn.nhcarrigan.com/new-avatars/hikari-full.png"
+  src="https://cdn.nhcarrigan.com/hikari.png"
   alt="Hikari"
   height="250"
+  style="display: block; margin: auto;"
 />
 <p id="one">How may I help you today?</p>
 <p id="two">I can assist you with:</p>