feat: add copy icon for user messages (#449)

* feat: add copy icon for user messages

Expose a copy control on user chat bubbles so previous content can be reused quickly.

* fix: Copy control is effectively hidden on touch devices

* fix: copyTextToClipboard doesn't need timer

---------

Co-authored-by: dev <dev@host.local>
Co-authored-by: Haileyesus <118998054+blackmammoth@users.noreply.github.com>

src/components/chat/view/subcomponents/MessageComponent.tsx

@@ -10,6 +10,7 @@ import type {
 import { Markdown } from './Markdown';
 import { formatUsageLimitText } from '../../utils/chatFormatting';
 import { getClaudePermissionSuggestion } from '../../utils/chatPermissions';
+import { copyTextToClipboard } from '../../../../utils/clipboard';
 import type { Project } from '../../../../types/app';
 import { ToolRenderer, shouldHideToolResult } from '../../tools';
 
@@ -53,6 +54,7 @@ const MessageComponent = memo(({ message, index, prevMessage, createDiff, onFile
   const [isExpanded, setIsExpanded] = React.useState(false);
   const permissionSuggestion = getClaudePermissionSuggestion(message, provider);
   const [permissionGrantState, setPermissionGrantState] = React.useState<PermissionGrantState>('idle');
+  const [messageCopied, setMessageCopied] = React.useState(false);
 
 
   React.useEffect(() => {
@@ -100,7 +102,7 @@ const MessageComponent = memo(({ message, index, prevMessage, createDiff, onFile
       {message.type === 'user' ? (
         /* User message bubble on the right */
         <div className="flex items-end space-x-0 sm:space-x-3 w-full sm:w-auto sm:max-w-[85%] md:max-w-md lg:max-w-lg xl:max-w-xl">
-          <div className="bg-blue-600 text-white rounded-2xl rounded-br-md px-3 sm:px-4 py-2 shadow-sm flex-1 sm:flex-initial">
+          <div className="bg-blue-600 text-white rounded-2xl rounded-br-md px-3 sm:px-4 py-2 shadow-sm flex-1 sm:flex-initial group">
             <div className="text-sm whitespace-pre-wrap break-words">
               {message.content}
             </div>
@@ -117,8 +119,45 @@ const MessageComponent = memo(({ message, index, prevMessage, createDiff, onFile
                 ))}
               </div>
             )}
-            <div className="text-xs text-blue-100 mt-1 text-right">
+            <div className="flex items-center justify-end gap-1 mt-1 text-xs text-blue-100">
-              {formattedTime}
+              <button
+                type="button"
+                onClick={() => {
+                  const text = String(message.content || '');
+                  if (!text) return;
+
+                  copyTextToClipboard(text).then((success) => {
+                    if (!success) return;
+                    setMessageCopied(true);
+                  });
+                }}
+                title={messageCopied ? t('copyMessage.copied') : t('copyMessage.copy')}
+                aria-label={messageCopied ? t('copyMessage.copied') : t('copyMessage.copy')}
+              >
+                {messageCopied ? (
+                  <svg className="w-3.5 h-3.5" viewBox="0 0 20 20" fill="currentColor">
+                    <path
+                      fillRule="evenodd"
+                      d="M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z"
+                      clipRule="evenodd"
+                    />
+                  </svg>
+                ) : (
+                  <svg
+                    className="w-3.5 h-3.5"
+                    viewBox="0 0 24 24"
+                    fill="none"
+                    stroke="currentColor"
+                    strokeWidth="2"
+                    strokeLinecap="round"
+                    strokeLinejoin="round"
+                  >
+                    <rect x="9" y="9" width="13" height="13" rx="2" ry="2"></rect>
+                    <path d="M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1"></path>
+                  </svg>
+                )}
+              </button>
+              <span>{formattedTime}</span>
             </div>
           </div>
           {!isGrouped && (

src/i18n/locales/en/chat.json

@@ -4,6 +4,10 @@
     "copied": "Copied",
     "copyCode": "Copy code"
   },
+  "copyMessage": {
+    "copy": "Copy message",
+    "copied": "Message copied"
+  },
   "messageTypes": {
     "user": "U",
     "error": "Error",

src/i18n/locales/ja/chat.json

@@ -4,6 +4,10 @@
     "copied": "コピーしました",
     "copyCode": "コードをコピー"
   },
+  "copyMessage": {
+    "copy": "メッセージをコピー",
+    "copied": "メッセージをコピーしました"
+  },
   "messageTypes": {
     "user": "U",
     "error": "エラー",

src/i18n/locales/ko/chat.json

@@ -4,6 +4,10 @@
     "copied": "복사됨",
     "copyCode": "코드 복사"
   },
+  "copyMessage": {
+    "copy": "메시지 복사",
+    "copied": "메시지 복사됨"
+  },
   "messageTypes": {
     "user": "U",
     "error": "오류",

src/i18n/locales/zh-CN/chat.json

@@ -4,6 +4,10 @@
     "copied": "已复制",
     "copyCode": "复制代码"
   },
+  "copyMessage": {
+    "copy": "复制消息",
+    "copied": "消息已复制"
+  },
   "messageTypes": {
     "user": "U",
     "error": "错误",