feat(conversation): add copy text context menu action with preserved selection

src/components/chat/chat-input.tsx

@@ -88,7 +88,10 @@ export const ChatInput = memo(function ChatInput({
   const isConnecting = status === "connecting"
 
   return (
-    <div className="p-4 pt-0">
+    <div
+      className="p-4 pt-0"
+      onContextMenu={(event) => event.stopPropagation()}
+    >
       {queue &&
         queue.length > 0 &&
         onQueueReorder &&

src/components/conversations/conversation-detail-panel.tsx

@@ -1,7 +1,16 @@
 "use client"
 
-import { memo, useCallback, useEffect, useMemo, useRef, useState } from "react"
 import {
+  memo,
+  useCallback,
+  useEffect,
+  useMemo,
+  useRef,
+  useState,
+  type PointerEvent as ReactPointerEvent,
+} from "react"
+import {
+  Copy,
   Download,
   FileCode,
   FileImage,
@@ -1221,6 +1230,72 @@ export function ConversationDetailPanel() {
     }))
   }, [activeConversationTab])
 
+  const [contextMenuSelectedText, setContextMenuSelectedText] = useState("")
+  const savedSelectionRangeRef = useRef<Range | null>(null)
+  const isContextMenuOpenRef = useRef(false)
+
+  const handleContextMenuOpenChange = useCallback((open: boolean) => {
+    isContextMenuOpenRef.current = open
+    if (!open) {
+      savedSelectionRangeRef.current = null
+      return
+    }
+    const selection = window.getSelection()
+    const text = selection?.toString() ?? ""
+    setContextMenuSelectedText(text)
+    savedSelectionRangeRef.current =
+      selection && selection.rangeCount > 0 && !selection.isCollapsed
+        ? selection.getRangeAt(0).cloneRange()
+        : null
+  }, [])
+
+  const handleContextMenuTriggerPointerDown = useCallback(
+    (event: ReactPointerEvent<HTMLDivElement>) => {
+      if (event.button !== 2) return
+      const selection = window.getSelection()
+      if (selection && !selection.isCollapsed) {
+        event.preventDefault()
+      }
+    },
+    []
+  )
+
+  useEffect(() => {
+    const handler = () => {
+      if (!isContextMenuOpenRef.current) return
+      const range = savedSelectionRangeRef.current
+      if (!range) return
+      if (
+        !document.contains(range.startContainer) ||
+        !document.contains(range.endContainer)
+      ) {
+        savedSelectionRangeRef.current = null
+        return
+      }
+      const selection = window.getSelection()
+      if (!selection) return
+      if (selection.toString().length > 0) return
+      selection.removeAllRanges()
+      selection.addRange(range)
+    }
+    document.addEventListener("selectionchange", handler)
+    return () => document.removeEventListener("selectionchange", handler)
+  }, [])
+
+  const handleCopySelectedText = useCallback(async () => {
+    if (!contextMenuSelectedText) return
+    if (!navigator.clipboard?.writeText) {
+      toast.error(t("copyTextFailed"))
+      return
+    }
+    try {
+      await navigator.clipboard.writeText(contextMenuSelectedText)
+      toast.success(t("copyTextSuccess"))
+    } catch {
+      toast.error(t("copyTextFailed"))
+    }
+  }, [contextMenuSelectedText, t])
+
   const handleNewConversation = useCallback(() => {
     if (!folder) return
     openNewConversationTab(folder.path)
@@ -1309,13 +1384,14 @@ export function ConversationDetailPanel() {
   }
 
   return (
-    <ContextMenu>
+    <ContextMenu onOpenChange={handleContextMenuOpenChange}>
       <ContextMenuTrigger asChild>
         <div
           className={cn(
             "relative h-full min-h-0 overflow-hidden",
             canTile && "flex flex-row"
           )}
+          onPointerDown={handleContextMenuTriggerPointerDown}
         >
           {tabs.map((tab, index) => {
             const active = tab.id === activeTabId
@@ -1352,6 +1428,14 @@ export function ConversationDetailPanel() {
         </div>
       </ContextMenuTrigger>
       <ContextMenuContent>
+        <ContextMenuItem
+          disabled={!contextMenuSelectedText}
+          onSelect={handleCopySelectedText}
+        >
+          <Copy className="h-4 w-4" />
+          {t("copyText")}
+        </ContextMenuItem>
+        <ContextMenuSeparator />
         <ContextMenuItem
           disabled={!canReloadActiveConversation}
           onSelect={handleReloadActiveConversation}

src/i18n/messages/ar.json

@@ -828,6 +828,9 @@
       "reload": "إعادة تحميل",
       "newConversation": "محادثة جديدة",
       "closeConversation": "إغلاق المحادثة",
+      "copyText": "نسخ النص",
+      "copyTextSuccess": "تم النسخ",
+      "copyTextFailed": "فشل النسخ",
       "forkSession": "تفريع الجلسة",
       "forkSessionSuccess": "تم تفريع الجلسة بنجاح",
       "forkSessionFailed": "فشل في تفريع الجلسة: {error}",

src/i18n/messages/de.json

@@ -828,6 +828,9 @@
       "reload": "Neu laden",
       "newConversation": "Neue Konversation",
       "closeConversation": "Konversation schließen",
+      "copyText": "Text kopieren",
+      "copyTextSuccess": "Kopiert",
+      "copyTextFailed": "Kopieren fehlgeschlagen",
       "forkSession": "Sitzung forken",
       "forkSessionSuccess": "Sitzung erfolgreich geforkt",
       "forkSessionFailed": "Sitzung konnte nicht geforkt werden: {error}",

src/i18n/messages/en.json

@@ -828,6 +828,9 @@
       "reload": "Reload",
       "newConversation": "New Conversation",
       "closeConversation": "Close Conversation",
+      "copyText": "Copy Text",
+      "copyTextSuccess": "Copied",
+      "copyTextFailed": "Copy failed",
       "forkSession": "Fork Session",
       "forkSessionSuccess": "Session forked successfully",
       "forkSessionFailed": "Failed to fork session: {error}",

src/i18n/messages/es.json

@@ -828,6 +828,9 @@
       "reload": "Recargar",
       "newConversation": "Nueva conversación",
       "closeConversation": "Cerrar conversación",
+      "copyText": "Copiar texto",
+      "copyTextSuccess": "Copiado",
+      "copyTextFailed": "Error al copiar",
       "forkSession": "Bifurcar sesión",
       "forkSessionSuccess": "Sesión bifurcada exitosamente",
       "forkSessionFailed": "Error al bifurcar la sesión: {error}",

src/i18n/messages/fr.json

@@ -828,6 +828,9 @@
       "reload": "Recharger",
       "newConversation": "Nouvelle conversation",
       "closeConversation": "Fermer la conversation",
+      "copyText": "Copier le texte",
+      "copyTextSuccess": "Copié",
+      "copyTextFailed": "Échec de la copie",
       "forkSession": "Dupliquer la session",
       "forkSessionSuccess": "Session dupliquée avec succès",
       "forkSessionFailed": "Échec de la duplication de la session : {error}",

src/i18n/messages/ja.json

@@ -828,6 +828,9 @@
       "reload": "再読み込み",
       "newConversation": "新しい会話",
       "closeConversation": "会話を閉じる",
+      "copyText": "テキストをコピー",
+      "copyTextSuccess": "コピーしました",
+      "copyTextFailed": "コピーに失敗しました",
       "forkSession": "セッションをフォーク",
       "forkSessionSuccess": "セッションのフォークに成功しました",
       "forkSessionFailed": "セッションのフォークに失敗しました：{error}",

src/i18n/messages/ko.json

@@ -828,6 +828,9 @@
       "reload": "다시 불러오기",
       "newConversation": "새 대화",
       "closeConversation": "대화 닫기",
+      "copyText": "텍스트 복사",
+      "copyTextSuccess": "복사됨",
+      "copyTextFailed": "복사 실패",
       "forkSession": "세션 포크",
       "forkSessionSuccess": "세션 포크 성공",
       "forkSessionFailed": "세션 포크 실패: {error}",

src/i18n/messages/pt.json

@@ -828,6 +828,9 @@
       "reload": "Recarregar",
       "newConversation": "Nova conversa",
       "closeConversation": "Fechar conversa",
+      "copyText": "Copiar texto",
+      "copyTextSuccess": "Copiado",
+      "copyTextFailed": "Falha ao copiar",
       "forkSession": "Bifurcar sessão",
       "forkSessionSuccess": "Sessão bifurcada com sucesso",
       "forkSessionFailed": "Falha ao bifurcar a sessão: {error}",

src/i18n/messages/zh-CN.json

@@ -828,6 +828,9 @@
       "reload": "重新加载",
       "newConversation": "新建会话",
       "closeConversation": "关闭会话",
+      "copyText": "复制文本",
+      "copyTextSuccess": "已复制",
+      "copyTextFailed": "复制失败",
       "forkSession": "分叉会话",
       "forkSessionSuccess": "会话分叉成功",
       "forkSessionFailed": "会话分叉失败：{error}",

src/i18n/messages/zh-TW.json

@@ -828,6 +828,9 @@
       "reload": "重新載入",
       "newConversation": "新增會話",
       "closeConversation": "關閉會話",
+      "copyText": "複製文字",
+      "copyTextSuccess": "已複製",
+      "copyTextFailed": "複製失敗",
       "forkSession": "分叉會話",
       "forkSessionSuccess": "會話分叉成功",
       "forkSessionFailed": "會話分叉失敗：{error}",