Copy button + hover highlight on assistant messages

raggr-frontend/src/components/AnswerBubble.tsx

@@ -1,6 +1,7 @@
-import React from "react";
+import { useState } from "react";
 import ReactMarkdown from "react-markdown";
 import remarkGfm from "remark-gfm";
+import { Copy, Check } from "lucide-react";
 
 type AnswerBubbleProps = {
   text: string;
@@ -8,6 +9,19 @@ type AnswerBubbleProps = {
 };
 
 export const AnswerBubble = React.memo(({ text, loading }: AnswerBubbleProps) => {
+  const [copied, setCopied] = useState(false);
+
+  const handleCopy = async (event: React.MouseEvent) => {
+    event.stopPropagation();
+    try {
+      await navigator.clipboard.writeText(text);
+      setCopied(true);
+      setTimeout(() => setCopied(false), 2000);
+    } catch {
+      // Clipboard unavailable (e.g. insecure context) — ignore
+    }
+  };
+
   return (
     <div className="message-enter">
       {loading ? (
@@ -17,8 +31,17 @@ export const AnswerBubble = React.memo(({ text, loading }: AnswerBubbleProps) =>
           <span className="loading-dot w-2 h-2 rounded-full bg-amber-soft inline-block" />
         </div>
       ) : (
-        <div className="markdown-content text-[15px] leading-relaxed text-charcoal">
-          <ReactMarkdown remarkPlugins={[remarkGfm]}>{text}</ReactMarkdown>
+        <div className="group relative -mx-3 -my-2 rounded-xl px-3 py-2 transition-colors duration-150 hover:bg-amber-soft/10">
+          <div className="markdown-content text-[15px] leading-relaxed text-charcoal">
+            <ReactMarkdown remarkPlugins={[remarkGfm]}>{text}</ReactMarkdown>
+          </div>
+          <button
+            onClick={handleCopy}
+            aria-label={copied ? "Copied" : "Copy message"}
+            className="absolute top-0 right-0 flex h-7 w-7 items-center justify-center rounded-lg border border-sand-light/60 bg-warm-white text-warm-gray shadow-sm opacity-0 transition-opacity duration-150 group-hover:opacity-100 hover:text-charcoal hover:bg-cream-dark focus:opacity-100 focus:outline-none cursor-pointer"
+          >
+            {copied ? <Check size={14} className="text-green-600" /> : <Copy size={14} />}
+          </button>
         </div>
       )}
     </div>