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/ui/popover.tsx

@@ -0,0 +1,40 @@
+"use client";
+
+import { Popover } from "radix-ui";
+import { cn } from "@/lib/utils";
+
+function PopoverRoot({ ...props }: React.ComponentProps<typeof Popover.Root>) {
+  return <Popover.Root data-slot="popover" {...props} />;
+}
+
+function PopoverTrigger({ ...props }: React.ComponentProps<typeof Popover.Trigger>) {
+  return <Popover.Trigger data-slot="popover-trigger" {...props} />;
+}
+
+function PopoverAnchor({ ...props }: React.ComponentProps<typeof Popover.Anchor>) {
+  return <Popover.Anchor data-slot="popover-anchor" {...props} />;
+}
+
+function PopoverContent({
+  className,
+  align = "center",
+  sideOffset = 4,
+  ...props
+}: React.ComponentProps<typeof Popover.Content>) {
+  return (
+    <Popover.Portal>
+      <Popover.Content
+        align={align}
+        className={cn(
+          "z-50 w-72 rounded-xl border border-border/60 bg-card/95 p-4 shadow-[var(--shadow-float)] backdrop-blur-xl outline-hidden data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2",
+          className
+        )}
+        data-slot="popover-content"
+        sideOffset={sideOffset}
+        {...props}
+      />
+    </Popover.Portal>
+  );
+}
+
+export { PopoverRoot as Popover, PopoverTrigger, PopoverContent, PopoverAnchor };