Initial commit: EGBE chatbot template

Stripped from vercel/chatbot (Apache 2.0):
- Dropped @vercel/* packages and AI Gateway
- Removed artifacts feature (code/text/sheet/image side panel)
- Switched AI provider to @ai-sdk/openai-compatible -> EGBE LiteLLM
- Replaced Vercel Blob upload with data URLs
- Dropped Redis resumable streams and rate limiter (in-memory now)
- Added Dockerfile (Next.js standalone) + entrypoint that runs migrations
- Wired DATABASE_URL, EGBE_AI_API_URL/KEY, NEXT_PUBLIC_BASE_URL for app-deploy.sh

components/chat/preview.tsx

@@ -0,0 +1,59 @@
+"use client";
+
+import { useRouter } from "next/navigation";
+import { suggestions } from "@/lib/constants";
+import { SparklesIcon } from "./icons";
+
+export function Preview() {
+  const router = useRouter();
+
+  const handleAction = (query?: string) => {
+    const url = query ? `/?query=${encodeURIComponent(query)}` : "/";
+    router.push(url);
+  };
+
+  return (
+    <div className="flex h-full flex-col overflow-hidden rounded-tl-2xl bg-background">
+      <div className="flex h-14 shrink-0 items-center gap-3 border-b border-border/20 px-5">
+        <div className="flex size-5 items-center justify-center rounded bg-muted/60 ring-1 ring-border/50">
+          <SparklesIcon size={10} />
+        </div>
+        <span className="text-[13px] text-muted-foreground">Chatbot</span>
+      </div>
+
+      <div className="flex flex-1 flex-col items-center justify-center gap-8 px-8">
+        <div className="text-center">
+          <h2 className="text-xl font-semibold tracking-tight">
+            What can I help with?
+          </h2>
+          <p className="mt-1.5 text-sm text-muted-foreground">
+            Ask a question, write code, or explore ideas.
+          </p>
+        </div>
+
+        <div className="grid w-full max-w-md grid-cols-2 gap-2">
+          {suggestions.map((suggestion) => (
+            <button
+              className="rounded-xl border border-border/30 bg-card/20 px-3 py-2.5 text-left text-[11px] leading-relaxed text-muted-foreground/70 transition-all duration-200 hover:border-border/60 hover:bg-card/40 hover:text-muted-foreground"
+              key={suggestion}
+              onClick={() => handleAction(suggestion)}
+              type="button"
+            >
+              {suggestion}
+            </button>
+          ))}
+        </div>
+      </div>
+
+      <div className="shrink-0 px-5 pb-5">
+        <button
+          className="flex w-full items-center rounded-2xl border border-border/30 bg-card/30 px-4 py-3 text-left text-[13px] text-muted-foreground/40 transition-colors hover:border-border/50 hover:text-muted-foreground/60"
+          onClick={() => handleAction()}
+          type="button"
+        >
+          Ask anything...
+        </button>
+      </div>
+    </div>
+  );
+}