Polish onboarding, invoices, and time clock while promoting the first registrant to admin.

Refresh onboarding wizard and shell, tighten invoice edit/detail flows, align timer widgets with the redesigned clock panel, and assign admin role on first signup.

Co-authored-by: Cursor <cursoragent@cursor.com>

eslint.config.js

@@ -5,7 +5,7 @@ import drizzle from "eslint-plugin-drizzle";
 
 export default tseslint.config(
   {
-    ignores: [".next"],
+    ignores: [".next", "scripts/**"],
   },
   ...nextCoreWebVitals,
   {