feat: add copy bubble button to copy entire message content (#245)

- Hover over any message to reveal a copy icon button
- Click to copy the full message text to clipboard
- Shows success/error toast notification
- Skips tool messages (no copy button shown)
- i18n support for all 8 languages (EN/ZH/DE/ES/FR/JA/KO/PT)
- Dark mode compatible styling

Co-authored-by: 356252190-star <356252190-star@users.noreply.github.com>

packages/client/src/components/hermes/chat/MessageItem.vue

@@ -27,6 +27,25 @@ const previewUrl = ref<string | null>(null);
 const chatStore = useChatStore();
 const settingsStore = useSettingsStore();
 
+// Copy entire bubble content
+const copyableContent = computed(() => {
+  if (props.message.role === 'tool') return null
+  const content = props.message.content || ''
+  if (!content.trim()) return null
+  return content
+})
+
+async function copyBubbleContent() {
+  const text = copyableContent.value
+  if (!text) return
+  try {
+    await navigator.clipboard.writeText(text)
+    toast.success(t('chat.copiedBubble'))
+  } catch {
+    toast.error(t('chat.copyFailed'))
+  }
+}
+
 const parsedThinking = computed(() =>
   parseThinking(props.message.content || "", { streaming: !!props.message.isStreaming }),
 );
@@ -414,7 +433,20 @@ const renderedToolResult = computed(() => {
               <span></span><span></span><span></span>
             </span>
           </div>
-          <div class="message-time">{{ timeStr }}</div>
+          <div class="message-meta">
+            <button
+              v-if="copyableContent"
+              class="copy-bubble-btn"
+              @click="copyBubbleContent"
+              :title="t('chat.copyBubble')"
+            >
+              <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                <rect x="9" y="9" width="13" height="13" rx="2" ry="2"/>
+                <path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"/>
+              </svg>
+            </button>
+            <span class="message-time">{{ timeStr }}</span>
+          </div>
         </div>
       </div>
     </template>
@@ -620,11 +652,53 @@ const renderedToolResult = computed(() => {
   }
 }
 
+.message-meta {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  margin-top: 4px;
+  padding: 0 4px;
+  opacity: 0;
+  transition: opacity 0.15s ease;
+
+  .message:hover & {
+    opacity: 1;
+  }
+}
+
+.copy-bubble-btn {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 24px;
+  height: 24px;
+  border: none;
+  background: transparent;
+  color: $text-muted;
+  cursor: pointer;
+  border-radius: $radius-sm;
+  padding: 0;
+  transition: color 0.15s ease, background 0.15s ease;
+
+  &:hover {
+    color: $text-secondary;
+    background: rgba(0, 0, 0, 0.06);
+  }
+
+  .dark & {
+    color: #999999;
+
+    &:hover {
+      color: #cccccc;
+      background: rgba(255, 255, 255, 0.08);
+    }
+  }
+}
+
 .message-time {
   font-size: 11px;
   color: $text-muted;
-  margin-top: 4px;
-  padding: 0 4px;
+  user-select: none;
 
   .dark & {
     color: #999999;

packages/client/src/i18n/locales/de.ts

@@ -137,6 +137,9 @@ export default {
     thinkingHide: 'Denkprozess ausblenden',
     thinkingDuration: 'Beobachtet {duration}',
     thinkingChars: '{count} Zeichen',
+    copyBubble: 'Nachricht kopieren',
+    copiedBubble: 'Nachricht kopiert',
+    copyFailed: 'Kopieren fehlgeschlagen',
   },
 
   // Jobs

packages/client/src/i18n/locales/en.ts

@@ -160,6 +160,9 @@ export default {
     thinkingHide: 'Hide thinking',
     thinkingDuration: 'Observed {duration}',
     thinkingChars: '{count} chars',
+    copyBubble: 'Copy message',
+    copiedBubble: 'Message copied',
+    copyFailed: 'Copy failed',
   },
 
   // Jobs

packages/client/src/i18n/locales/es.ts

@@ -137,6 +137,9 @@ export default {
     thinkingHide: 'Ocultar pensamiento',
     thinkingDuration: 'Observado {duration}',
     thinkingChars: '{count} caracteres',
+    copyBubble: 'Copiar mensaje',
+    copiedBubble: 'Mensaje copiado',
+    copyFailed: 'Error al copiar',
   },
 
   // Jobs

packages/client/src/i18n/locales/fr.ts

@@ -137,6 +137,9 @@ export default {
     thinkingHide: 'Masquer le raisonnement',
     thinkingDuration: 'Observé {duration}',
     thinkingChars: '{count} caractères',
+    copyBubble: 'Copier le message',
+    copiedBubble: 'Message copié',
+    copyFailed: 'Échec de la copie',
   },
 
   // Jobs

packages/client/src/i18n/locales/ja.ts

@@ -137,6 +137,9 @@ export default {
     thinkingHide: '思考過程を隠す',
     thinkingDuration: '観測 {duration}',
     thinkingChars: '{count} 文字',
+    copyBubble: 'メッセージをコピー',
+    copiedBubble: 'コピーしました',
+    copyFailed: 'コピーに失敗しました',
   },
 
   // スケジュールジョブ

packages/client/src/i18n/locales/ko.ts

@@ -137,6 +137,9 @@ export default {
     thinkingHide: '사고 과정 접기',
     thinkingDuration: '관측 {duration}',
     thinkingChars: '{count}자',
+    copyBubble: '메시지 복사',
+    copiedBubble: '복사됨',
+    copyFailed: '복사 실패',
   },
 
   // 예약 작업

packages/client/src/i18n/locales/pt.ts

@@ -137,6 +137,9 @@ export default {
     thinkingHide: 'Ocultar raciocínio',
     thinkingDuration: 'Observado {duration}',
     thinkingChars: '{count} caracteres',
+    copyBubble: 'Copiar mensagem',
+    copiedBubble: 'Mensagem copiada',
+    copyFailed: 'Falha ao copiar',
   },
 
   // Jobs

packages/client/src/i18n/locales/zh.ts

@@ -160,6 +160,9 @@ export default {
     thinkingHide: '收起思考过程',
     thinkingDuration: '已观察 {duration}',
     thinkingChars: '{count} 字',
+    copyBubble: '复制消息',
+    copiedBubble: '已复制',
+    copyFailed: '复制失败',
   },
 
   // 定时任务