refactor: enhance onboarding experience

- Replaced the completion step component with a more streamlined onboarding page that includes action cards for managing teams, adding sources, and starting chats.
- Updated the search space form to make the description field optional and improved validation messages.
- Adjusted the onboarding logic to support auto-configuration of LLM roles and improved loading states.
- Removed unused imports and components to clean up the codebase.

surfsense_web/components/onboard/onboard-loading.tsx

@@ -0,0 +1,47 @@
+"use client";
+
+import { Wand2 } from "lucide-react";
+import { motion } from "motion/react";
+
+interface OnboardLoadingProps {
+	title: string;
+	subtitle: string;
+}
+
+export function OnboardLoading({ title, subtitle }: OnboardLoadingProps) {
+	return (
+		<div className="min-h-screen bg-background flex items-center justify-center p-4">
+			<motion.div
+				initial={{ opacity: 0, scale: 0.9 }}
+				animate={{ opacity: 1, scale: 1 }}
+				transition={{ duration: 0.5 }}
+				className="text-center"
+			>
+				<div className="relative mb-8 flex justify-center">
+					<motion.div
+						animate={{ rotate: 360 }}
+						transition={{ duration: 2, repeat: Infinity, ease: "linear" }}
+					>
+						<Wand2 className="w-16 h-16 text-primary" />
+					</motion.div>
+				</div>
+				<h2 className="text-2xl font-bold text-foreground mb-2">{title}</h2>
+				<p className="text-muted-foreground">{subtitle}</p>
+				<div className="mt-6 flex justify-center gap-1.5">
+					{[0, 1, 2].map((i) => (
+						<motion.div
+							key={i}
+							className="w-2 h-2 rounded-full bg-primary"
+							animate={{ scale: [1, 1.5, 1], opacity: [0.5, 1, 0.5] }}
+							transition={{
+								duration: 1,
+								repeat: Infinity,
+								delay: i * 0.2,
+							}}
+						/>
+					))}
+				</div>
+			</motion.div>
+		</div>
+	);
+}