feat(ui): loyalty stamp redesign and admin account restrictions

Redesigned fuchsia-themed loyalty stamp card with procedural SVG flower-petal stamps (unique shape per slot via sine-wave perturbation), star cutout mask, hover animations, and gradient background. Admin accounts now see simplified account page with History, Referral, Danger Zone tabs and loyalty stamp card hidden.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

frontend/src/app.css

@@ -2,6 +2,8 @@
 
 @import 'tw-animate-css';
 
+@import "shadcn-svelte/tailwind.css";
+
 @custom-variant dark (&:is(.dark *));
 
 :root {
@@ -119,6 +121,12 @@
 	body {
 		@apply bg-background text-foreground;
 	}
+	.maplibregl-popup-content {
+		@apply bg-transparent! shadow-none! p-0! rounded-none!;
+	}
+	.maplibregl-popup-tip {
+		@apply hidden!;
+	}
 }
 
 .calendar-container {