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/sanctions/sanctions.css

@@ -1,11 +1,11 @@
 hr {
   width: 100%;
   border: none;
-  border-top: 1px solid var(--foreground);
+  border-top: 1px solid var(--border);
   margin: 0;
 }
 
-:host ::ng-deep ul{
+:host ::ng-deep ul {
   list-style-type: disc;
   list-style-position: inside;
 }
@@ -15,13 +15,14 @@ hr {
   margin-bottom: 1em;
   width: 90%;
 }
+
 .tag {
   display: inline-block;
   padding: 0 0.5em;
   border-radius: 50px;
   font-size: 0.8em;
-  background-color: #e0f7fa;
-  color: #006064;
+  background-color: var(--witch-plum);
+  color: var(--witch-moon);
 }
 
 .date {