refactor: remove developer mode and related components

add glowing effect component for tab tiles
improve tab tile appearance with new glow effect
add 'none' log level and simplify log level handling
simplify tab configuration store by removing developer tabs
remove useDebugStatus hook and related debug functionality
remove system info endpoints no longer needed

app/utils/cn.ts

@@ -0,0 +1,6 @@
+import { type ClassValue, clsx } from 'clsx';
+import { twMerge } from 'tailwind-merge';
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs));
+}