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Greasy Fork is available in English.

Discord Link Copy Utility

专为 Discord 分享设计的链接转换工具,支持 Twitter/X、Reddit、Instagram、TikTok、Threads、Pixiv、Bilibili、Facebook、Tumblr、YouTube Shorts、Bluesky 等平台。支持原始与嵌入域名互转,双击 ` 键或自定义快捷键触发:只有一个转换目标时直接复制,多个目标时开启选择面板。自动移除追踪参数,支持自定义域名规则。

您需要先安装一款用户脚本管理器扩展,例如 Tampermonkey 篡改猴Greasemonkey 油猴子Violentmonkey 暴力猴,才能安装此脚本。

您需要先安装一款用户脚本管理器扩展,例如 Tampermonkey 篡改猴,才能安装此脚本。

您需要先安装一款用户脚本管理器扩展,例如 Tampermonkey 篡改猴Violentmonkey 暴力猴,才能安装此脚本。

您需要先安装一款用户脚本管理器扩展,例如 Tampermonkey 篡改猴Userscripts ,才能安装此脚本。

您需要先安装一款用户脚本管理器扩展,例如 Tampermonkey 篡改猴,才能安装此脚本。

您需要先安装一款用户脚本管理器扩展后才能安装此脚本。

(我已经安装了用户脚本管理器,让我安装!)

您需要先安装一款用户样式管理器扩展,比如 Stylus,才能安装此样式。

您需要先安装一款用户样式管理器扩展,比如 Stylus,才能安装此样式。

您需要先安装一款用户样式管理器扩展,比如 Stylus,才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

您需要先安装一款用户样式管理器扩展后才能安装此样式。

(我已经安装了用户样式管理器,让我安装!)

// ==UserScript==
// @name              Discord  Link Copy Utility
// @namespace         https://github.com/Startanuki07?tab=repositories
// @version           1.4.1
// @license           MIT
// @author            Star_tanuki07
// @description       Converts social media links (Twitter/X, Reddit, Instagram, TikTok, Threads, Pixiv, Bilibili, Facebook, Tumblr, YouTube Shorts, Bluesky) into embed-friendly formats for Discord sharing. Supports mutual conversion between original and embed domains. Double-press ` (backtick) or use a custom shortcut — single target copies instantly, multiple targets open a selection panel. Strips tracking parameters and supports custom domain rules.
// @description:zh-TW 專為 Discord 分享設計的連結轉換工具,支援 Twitter/X、Reddit、Instagram、TikTok、Threads、Pixiv、Bilibili、Facebook、Tumblr、YouTube Shorts、Bluesky 等平台。支援原始與嵌入網域互轉,雙擊 ` 鍵或自訂快捷鍵觸發:只有一個轉換目標時直接複製,多個目標時開啟選擇面板。自動移除追蹤參數,支援自訂域名規則。
// @description:zh-CN 专为 Discord 分享设计的链接转换工具,支持 Twitter/X、Reddit、Instagram、TikTok、Threads、Pixiv、Bilibili、Facebook、Tumblr、YouTube Shorts、Bluesky 等平台。支持原始与嵌入域名互转,双击 ` 键或自定义快捷键触发:只有一个转换目标时直接复制,多个目标时开启选择面板。自动移除追踪参数,支持自定义域名规则。
// @description:ja    Discord シェア向けリンク変換ツール。Twitter/X・Reddit・Instagram・TikTok・Threads・Pixiv・Bilibili・Tumblr・Bluesky を埋め込み対応形式に変換。元ドメイン⇔埋め込みドメイン間の相互変換に対応。` キー連打またはカスタムショートカットで起動:変換先が1つなら即コピー、複数なら選択パネルを表示。追跡パラメータを自動除去。
// @description:ko    Discord 공유용 링크 변환 도구. Twitter/X, Reddit, Instagram, TikTok, Threads, Pixiv, Bilibili, Tumblr, Bluesky URL을 임베드 지원 형식으로 변환합니다. ` 키 두 번 또는 커스텀 단축키로 동작: 변환 대상이 하나면 즉시 복사, 여러 개면 선택 패널 표시. 추적 파라미터 자동 제거.
// @description:es    Herramienta de conversión de enlaces para Discord. Convierte URLs de Twitter/X, Reddit, Instagram, TikTok, Threads, Pixiv, Bilibili, Facebook, Tumblr y Bluesky a formatos con vista previa. Presiona ` dos veces o usa un atajo: si hay un destino, copia directo; si hay varios, abre el panel.
// @description:pt-BR Ferramenta de conversão de links para Discord. Convierte URLs do Twitter/X, Reddit, Instagram, TikTok, Threads, Pixiv, Bilibili, Facebook, Tumblr e Bluesky para formatos com pré-visualização. Pressione ` duas vezes ou use atalho: um destino copia direto, vários abre o painel.
// @description:fr    Outil de conversion de liens pour Discord. Convertit les URLs Twitter/X, Reddit, Instagram, TikTok, Threads, Pixiv, Bilibili, Facebook, Tumblr et Bluesky en formats avec aperçu intégré. ` deux fois ou raccourci : une cible = copie directe, plusieurs = panneau de sélection.
// @description:ru    Инструмент конвертации ссылок для Discord. Преобразует ссылки Twitter/X, Reddit, Instagram, TikTok, Threads, Pixiv, Bilibili, Facebook, Tumblr и Bluesky в форматы с предпросмотром. Двойное ` или ярлык: один вариант = сразу копирует, несколько = открывает панель выбора.
// @icon              https://www.google.com/s2/favicons?sz=64&domain=tampermonkey.net
// @match             *://*/*
// @grant             GM_addStyle
// @grant             GM_setClipboard
// @grant             GM_setValue
// @grant             GM_getValue
// @grant             GM_registerMenuCommand
// ==/UserScript==

(function () {
  "use strict";

  const DEFAULT_CONFIG = {
    triggerKey: "`",
    shortcut: null,
    doublePressDelay: 300,
    lang: null,
  };

  const LANG_LABELS = {
    en: "EN",
    "zh-TW": "TW",
    "zh-CN": "CN",
    ja: "JA",
    ko: "KO",
    es: "ES",
    "pt-BR": "PT",
    fr: "FR",
    ru: "RU",
    __custom: "🌐",
  };

  const TRANSLATIONS = {
    en: {
      title: "Link Fixer",
      orig: "Original",
      orig_clean: "Original (Cleaned)",
      to: "to",
      add_rule_prompt: "➕ Add Rule for Site",
      manage_btn: "⚙️ Settings",
      settings_title: "Settings & Rules",
      sec_rules: "Custom Rules",
      sec_keys: "Key Bindings",
      ph_src: "Source Domain (e.g., youtube.com)",
      ph_tgt: "Target Domain (e.g., yewtu.be)",
      btn_add: "Add",
      btn_back: "← Back",
      lbl_trigger: "Double-Press Trigger",
      lbl_shortcut: "Global Shortcut",
      empty_rules: "No custom rules",
      rec_press: "Press any key... (Esc to cancel)",
      rec_none: "None (Click to set)",
      toast_copied: "Copied",
      toast_added: "Rule Added",
      toast_key_updated: "Key Updated",
      toast_key_cleared: "Shortcut Cleared",
      desc_trigger: "Double-press this key anywhere outside a text box. If the page has exactly one conversion target, it copies directly — no panel needed. If there are multiple targets, the panel opens so you can choose.",
      desc_shortcut: "Set a key combo (e.g. Ctrl+Shift+L) to trigger the same smart-copy logic. Press Backspace or Delete while recording to clear the shortcut.",
      desc_rules: "Rules are matched by domain. Add a source → target pair to convert any link on that domain. Your custom rules are applied on top of the built-in ones.",
      sec_prefs: "Site Preferences",
      pref_empty: "No preferences set",
      badge_last: "Last used",
      lbl_always_direct: "Always use this format for this site (skip panel)",
      pre_copied_hint: "Pre-copied (last used):",
      toast_pref_saved: "Preference saved",
      toast_pref_cleared: "Preference cleared",
      lbl_toast_jump: "Copy Toast Jump",
      desc_toast_jump: "When enabled, click or hover the copy notification to open a quick-jump list. Each entry opens in a new tab.",
      lbl_toast_action: "Trigger",
      opt_click: "Click",
      opt_hover: "Hover",
      sec_jump_links: "Jump Links",
      ph_link_name: "Site name",
      ph_link_url: "URL (https://...)",
      btn_add_link: "Add Link",
      empty_links: "No jump links",
      toast_link_added: "Link added",
      toast_link_deleted: "Deleted",
      lbl_edit: "Edit",
      lbl_done: "Done",
      lbl_cancel: "Cancel",
      toast_input_focus_warn: "⌨️ Press the shortcut again to copy the page URL",
    },
    "zh-TW": {
      title: "連結轉換工具",
      orig: "原始連結",
      orig_clean: "原始連結 (已淨化)",
      to: "轉為",
      add_rule_prompt: "➕ 為此網站新增規則",
      manage_btn: "⚙️ 設定與規則",
      settings_title: "設定與規則管理",
      sec_rules: "自定義規則管理",
      sec_keys: "按鍵偏好設定",
      ph_src: "來源網域 (如: youtube.com)",
      ph_tgt: "目標網域 (如: yewtu.be)",
      btn_add: "新增",
      btn_back: "← 返回",
      lbl_trigger: "連點觸發鍵",
      lbl_shortcut: "快捷鍵",
      empty_rules: "無自定義規則",
      rec_press: "請按下按鍵... (Esc 取消)",
      rec_none: "無 (點擊設定)",
      toast_copied: "已複製",
      toast_added: "規則已新增",
      toast_key_updated: "按鍵已更新",
      toast_key_cleared: "快捷鍵已清除",
      desc_trigger: "在任意非輸入框的頁面上快速連按兩下此鍵。若當前頁面只有一個轉換目標,會直接複製到剪貼簿,無需開啟面板;若有多個目標則開啟面板讓你選擇。",
      desc_shortcut: "設定一組組合鍵(如 Ctrl+Shift+L)來觸發相同的智慧複製邏輯。錄製中按 Backspace 或 Delete 可清除快捷鍵設定。",
      desc_rules: "規則以網域為單位進行比對。新增來源 → 目標網域對,即可在該網域的任意頁面上進行連結轉換。自訂規則會疊加在內建規則之上。",
      sec_prefs: "網站偏好設定",
      pref_empty: "尚未設定任何偏好",
      badge_last: "上次使用",
      lbl_always_direct: "此網站預設直接複製此格式(不再彈出選單)",
      pre_copied_hint: "已預先複製(上次使用):",
      toast_pref_saved: "偏好已儲存",
      toast_pref_cleared: "偏好已清除",
      lbl_toast_jump: "複製提示跳轉",
      desc_toast_jump: "啟用後,點擊或將滑鼠移入複製通知時,會彈出已設定的跳轉連結清單,點擊可在新分頁開啟對應網站。",
      lbl_toast_action: "觸發方式",
      opt_click: "點擊",
      opt_hover: "滑鼠移入",
      sec_jump_links: "跳轉連結",
      ph_link_name: "網站名稱",
      ph_link_url: "網址 (https://...)",
      btn_add_link: "新增連結",
      empty_links: "尚無跳轉連結",
      toast_link_added: "連結已新增",
      toast_link_deleted: "已刪除",
      lbl_edit: "編輯",
      lbl_done: "完成",
      lbl_cancel: "取消",
      toast_input_focus_warn: "⌨️ 焦點在輸入欄位,再按一次快捷鍵即可複製本頁網址",
    },
    "zh-CN": {
      title: "链接转换工具",
      orig: "原始链接",
      orig_clean: "原始链接 (已净化)",
      to: "转为",
      add_rule_prompt: "➕ 为此网站新增规则",
      manage_btn: "⚙️ 设置与规则",
      settings_title: "设置与规则管理",
      sec_rules: "自定义规则管理",
      sec_keys: "按键偏好设置",
      ph_src: "来源域名 (如: youtube.com)",
      ph_tgt: "目标域名 (如: yewtu.be)",
      btn_add: "新增",
      btn_back: "← 返回",
      lbl_trigger: "连击触发键",
      lbl_shortcut: "快捷键",
      empty_rules: "无自定义规则",
      rec_press: "请按下按键... (Esc 取消)",
      rec_none: "无 (点击设置)",
      toast_copied: "已复制",
      toast_added: "规则已新增",
      toast_key_updated: "按键已更新",
      toast_key_cleared: "快捷键已清除",
      desc_trigger: "在任意非输入框的页面上快速连按两下此键。若当前页面只有一个转换目标,将直接复制到剪贴板,无需打开面板;若有多个目标则打开面板让你选择。",
      desc_shortcut: "设置一组组合键(如 Ctrl+Shift+L)触发相同的智能复制逻辑。录制中按 Backspace 或 Delete 可清除快捷键设置。",
      desc_rules: "规则以域名为单位进行匹配。添加来源 → 目标域名对,即可在该域名的任意页面上进行链接转换。自定义规则将叠加在内置规则之上。",
      sec_prefs: "网站偏好设置",
      pref_empty: "尚未设置任何偏好",
      badge_last: "上次使用",
      lbl_always_direct: "此网站预设直接复制此格式(不再弹出选单)",
      pre_copied_hint: "已预先复制(上次使用):",
      toast_pref_saved: "偏好已保存",
      toast_pref_cleared: "偏好已清除",
      lbl_toast_jump: "复制提示跳转",
      desc_toast_jump: "启用后,点击或将鼠标移入复制通知时,会弹出已设置的跳转链接列表,点击可在新标签页打开对应网站。",
      lbl_toast_action: "触发方式",
      opt_click: "点击",
      opt_hover: "鼠标移入",
      sec_jump_links: "跳转链接",
      ph_link_name: "网站名称",
      ph_link_url: "网址 (https://...)",
      btn_add_link: "新增链接",
      empty_links: "暂无跳转链接",
      toast_link_added: "链接已新增",
      toast_link_deleted: "已删除",
      lbl_edit: "编辑",
      lbl_done: "完成",
      lbl_cancel: "取消",
      toast_input_focus_warn: "⌨️ 焦点在输入框,再按一次快捷键即可复制本页网址",
    },
    ja: {
      title: "リンク変換ツール",
      orig: "元のリンク",
      orig_clean: "元のリンク (浄化済)",
      to: "変換",
      add_rule_prompt: "➕ このサイトのルールを追加",
      manage_btn: "⚙️ 設定",
      settings_title: "設定とルール管理",
      sec_rules: "カスタムルール",
      sec_keys: "キー設定",
      ph_src: "ソースドメイン (例: youtube.com)",
      ph_tgt: "ターゲットドメイン (例: yewtu.be)",
      btn_add: "追加",
      btn_back: "← 戻る",
      lbl_trigger: "連打トリガー",
      lbl_shortcut: "ショートカット",
      empty_rules: "ルールなし",
      rec_press: "キーを押してください... (Escで取消)",
      rec_none: "なし (クリック設定)",
      toast_copied: "コピーしました",
      toast_added: "ルールを追加しました",
      toast_key_updated: "キーを更新しました",
      toast_key_cleared: "ショートカットを削除しました",
      desc_trigger: "テキスト入力欄の外ならどこでも、このキーをすばやく2回押すと動作します。変換先が1つだけの場合は直接クリップボードにコピーされ、複数ある場合はパネルが開きます。",
      desc_shortcut: "キーの組み合わせ(例:Ctrl+Shift+L)を設定して、同じスマートコピー機能を呼び出せます。記録中に Backspace または Delete を押すとショートカットをクリアできます。",
      desc_rules: "ルールはドメイン単位でマッチングされます。ソース → ターゲットのドメインペアを追加すると、そのドメインの任意のページでリンク変換が適用されます。",
      sec_prefs: "サイト設定",
      pref_empty: "設定なし",
      badge_last: "最後に使用",
      lbl_always_direct: "このサイトは常にこの形式を使用(パネルを開かない)",
      pre_copied_hint: "事前コピー済み(最後に使用):",
      toast_pref_saved: "設定を保存しました",
      toast_pref_cleared: "設定をクリアしました",
      lbl_toast_jump: "コピー通知ジャンプ",
      desc_toast_jump: "有効にすると、コピー通知をクリックまたはホバーでジャンプリストを表示し、クリックで新しいタブを開きます。",
      lbl_toast_action: "トリガー",
      opt_click: "クリック",
      opt_hover: "ホバー",
      sec_jump_links: "ジャンプリンク",
      ph_link_name: "サイト名",
      ph_link_url: "URL (https://...)",
      btn_add_link: "追加",
      empty_links: "ジャンプリンクなし",
      toast_link_added: "リンクを追加しました",
      toast_link_deleted: "削除しました",
      lbl_edit: "編集",
      lbl_done: "完了",
      lbl_cancel: "キャンセル",
      toast_input_focus_warn: "⌨️ 入力欄にフォーカス中 — もう一度ショートカットを押すとページURLをコピーできます",
    },
    ko: {
      title: "링크 변환 도구",
      orig: "원본 링크",
      orig_clean: "원본 링크 (정화됨)",
      to: "변환",
      add_rule_prompt: "➕ 이 사이트에 규칙 추가",
      manage_btn: "⚙️ 설정 및 규칙",
      settings_title: "설정 및 규칙 관리",
      sec_rules: "사용자 정의 규칙",
      sec_keys: "단축키 설정",
      ph_src: "소스 도메인 (예: youtube.com)",
      ph_tgt: "타겟 도메인 (예: yewtu.be)",
      btn_add: "추가",
      btn_back: "← 뒤로",
      lbl_trigger: "연타 트리거 키",
      lbl_shortcut: "단축키",
      empty_rules: "사용자 정의 규칙 없음",
      rec_press: "키를 누르세요... (Esc 취소)",
      rec_none: "없음 (클릭하여 설정)",
      toast_copied: "복사됨",
      toast_added: "규칙이 추가됨",
      toast_key_updated: "키 설정 업데이트됨",
      toast_key_cleared: "단축키 해제됨",
      desc_trigger: "텍스트 입력창 외부에서 이 키를 빠르게 두 번 누르면 동작합니다. 변환 대상이 하나뿐이면 바로 복사되고, 여러 개면 패널이 열립니다.",
      desc_shortcut: "키 조합(예: Ctrl+Shift+L)을 설정하여 동일한 스마트 복사 기능을 사용할 수 있습니다. 녹화 중 Backspace 또는 Delete를 누르면 단축키를 초기화합니다.",
      desc_rules: "규칙은 도메인 단위로 매칭됩니다. 소스 → 대상 도메인 쌍을 추가하면 해당 도메인의 모든 페이지에서 링크 변환이 적용됩니다.",
      sec_prefs: "사이트 환경설정",
      pref_empty: "설정된 환경설정 없음",
      badge_last: "마지막 사용",
      lbl_always_direct: "이 사이트는 항상 이 형식으로 복사 (패널 생략)",
      pre_copied_hint: "사전 복사됨 (마지막 사용):",
      toast_pref_saved: "환경설정 저장됨",
      toast_pref_cleared: "환경설정 해제됨",
      lbl_toast_jump: "복사 알림 점프",
      desc_toast_jump: "활성화하면 복사 알림을 클릭하거나 호버하면 점프 링크 목록이 표시됩니다.",
      lbl_toast_action: "트리거",
      opt_click: "클릭",
      opt_hover: "호버",
      sec_jump_links: "점프 링크",
      ph_link_name: "사이트 이름",
      ph_link_url: "URL (https://...)",
      btn_add_link: "링크 추가",
      empty_links: "점프 링크 없음",
      toast_link_added: "링크 추가됨",
      toast_link_deleted: "삭제됨",
      lbl_edit: "편집",
      lbl_done: "완료",
      lbl_cancel: "취소",
      toast_input_focus_warn: "⌨️ 입력창에 포커스 중 — 단축키를 한 번 더 누르면 이 페이지 URL을 복사합니다",
    },
    es: {
      title: "Convertidor de enlaces",
      orig: "Enlace original",
      orig_clean: "Enlace original (limpio)",
      to: "a",
      add_rule_prompt: "➕ Agregar regla para este sitio",
      manage_btn: "⚙️ Ajustes",
      settings_title: "Ajustes y reglas",
      sec_rules: "Reglas personalizadas",
      sec_keys: "Teclas de acceso",
      ph_src: "Dominio origen (ej: youtube.com)",
      ph_tgt: "Dominio destino (ej: yewtu.be)",
      btn_add: "Agregar",
      btn_back: "← Volver",
      lbl_trigger: "Tecla de doble pulsación",
      lbl_shortcut: "Atajo global",
      empty_rules: "Sin reglas personalizadas",
      rec_press: "Presiona una tecla... (Esc para cancelar)",
      rec_none: "Ninguna (clic para configurar)",
      toast_copied: "Copiado",
      toast_added: "Regla agregada",
      toast_key_updated: "Tecla actualizada",
      toast_key_cleared: "Atajo eliminado",
      desc_trigger: "Presiona esta tecla dos veces rápidamente fuera de cualquier cuadro de texto. Si hay un solo destino de conversión, se copia directamente; si hay varios, se abre el panel.",
      desc_shortcut: "Configura una combinación de teclas (ej.: Ctrl+Shift+L) para la misma lógica de copia inteligente. Presiona Retroceso o Supr mientras grabas para limpiar el atajo.",
      desc_rules: "Las reglas se comparan por dominio. Agrega un par fuente → destino para convertir cualquier enlace en ese dominio. Las reglas personalizadas se suman a las integradas.",
      sec_prefs: "Preferencias de sitio",
      pref_empty: "Sin preferencias configuradas",
      badge_last: "Último uso",
      lbl_always_direct: "Usar siempre este formato para este sitio (sin panel)",
      pre_copied_hint: "Precopiado (último uso):",
      toast_pref_saved: "Preferencia guardada",
      toast_pref_cleared: "Preferencia borrada",
      lbl_toast_jump: "Salto de notificación",
      desc_toast_jump: "Al activar, clic o hover en la notificación abre la lista de saltos.",
      lbl_toast_action: "Disparador",
      opt_click: "Clic",
      opt_hover: "Hover",
      sec_jump_links: "Enlaces de salto",
      ph_link_name: "Nombre del sitio",
      ph_link_url: "URL (https://...)",
      btn_add_link: "Agregar enlace",
      empty_links: "Sin enlaces de salto",
      toast_link_added: "Enlace agregado",
      toast_link_deleted: "Eliminado",
      lbl_edit: "Editar",
      lbl_done: "Listo",
      lbl_cancel: "Cancelar",
      toast_input_focus_warn: "⌨️ Foco en campo de texto — pulsa el atajo otra vez para copiar la URL de esta página",
    },
    "pt-BR": {
      title: "Conversor de links",
      orig: "Link original",
      orig_clean: "Link original (limpo)",
      to: "para",
      add_rule_prompt: "➕ Adicionar regra para este site",
      manage_btn: "⚙️ Configurações",
      settings_title: "Configurações e regras",
      sec_rules: "Regras personalizadas",
      sec_keys: "Teclas de atalho",
      ph_src: "Domínio de origem (ex: youtube.com)",
      ph_tgt: "Domínio de destino (ex: yewtu.be)",
      btn_add: "Adicionar",
      btn_back: "← Voltar",
      lbl_trigger: "Tecla de duplo toque",
      lbl_shortcut: "Atalho global",
      empty_rules: "Nenhuma regra personalizada",
      rec_press: "Pressione uma tecla... (Esc para cancelar)",
      rec_none: "Nenhuma (clique para configurar)",
      toast_copied: "Copiado",
      toast_added: "Regra adicionada",
      toast_key_updated: "Tecla atualizada",
      toast_key_cleared: "Atalho removido",
      desc_trigger: "Pressione esta tecla duas vezes rapidamente fora de qualquer caixa de texto. Se houver apenas um destino de conversão, ele é copiado diretamente; se houver vários, o painel é aberto.",
      desc_shortcut: "Configure uma combinação de teclas (ex.: Ctrl+Shift+L) para a mesma lógica de cópia inteligente. Pressione Backspace ou Delete durante a gravação para limpar o atalho.",
      desc_rules: "As regras são correspondidas por domínio. Adicione um par origem → destino para converter qualquer link nesse domínio. As regras personalizadas são aplicadas sobre as integradas.",
      sec_prefs: "Preferências de site",
      pref_empty: "Sem preferências definidas",
      badge_last: "Último uso",
      lbl_always_direct: "Usar sempre este formato (sem painel)",
      pre_copied_hint: "Pré-copiado (último uso):",
      toast_pref_saved: "Preferência salva",
      toast_pref_cleared: "Preferência removida",
      lbl_toast_jump: "Salto de notificação",
      desc_toast_jump: "Ao ativar, clicar ou passar o mouse na notificação abre a lista de saltos.",
      lbl_toast_action: "Gatilho",
      opt_click: "Clique",
      opt_hover: "Hover",
      sec_jump_links: "Links de salto",
      ph_link_name: "Nome do site",
      ph_link_url: "URL (https://...)",
      btn_add_link: "Adicionar link",
      empty_links: "Sem links de salto",
      toast_link_added: "Link adicionado",
      toast_link_deleted: "Removido",
      lbl_edit: "Editar",
      lbl_done: "Concluir",
      lbl_cancel: "Cancelar",
      toast_input_focus_warn: "⌨️ Foco no campo de texto — pressione o atalho novamente para copiar a URL desta página",
    },
    fr: {
      title: "Convertisseur de liens",
      orig: "Lien original",
      orig_clean: "Lien original (nettoyé)",
      to: "vers",
      add_rule_prompt: "➕ Ajouter une règle pour ce site",
      manage_btn: "⚙️ Paramètres",
      settings_title: "Paramètres et règles",
      sec_rules: "Règles personnalisées",
      sec_keys: "Raccourcis clavier",
      ph_src: "Domaine source (ex : youtube.com)",
      ph_tgt: "Domaine cible (ex : yewtu.be)",
      btn_add: "Ajouter",
      btn_back: "← Retour",
      lbl_trigger: "Touche double-pression",
      lbl_shortcut: "Raccourci global",
      empty_rules: "Aucune règle personnalisée",
      rec_press: "Appuyez sur une touche… (Échap pour annuler)",
      rec_none: "Aucun (cliquer pour configurer)",
      toast_copied: "Copié",
      toast_added: "Règle ajoutée",
      toast_key_updated: "Touche mise à jour",
      toast_key_cleared: "Raccourci supprimé",
      desc_trigger: "Appuyez deux fois rapidement sur cette touche en dehors de tout champ de texte. S'il n'y a qu'une seule cible de conversion, elle est copiée directement ; sinon, le panneau s'ouvre.",
      desc_shortcut: "Définissez une combinaison de touches (ex. : Ctrl+Shift+L) pour la même logique de copie intelligente. Appuyez sur Retour arrière ou Suppr pendant l'enregistrement pour effacer le raccourci.",
      desc_rules: "Les règles sont associées par domaine. Ajoutez une paire source → cible pour convertir tout lien de ce domaine. Les règles personnalisées s'ajoutent aux règles intégrées.",
      sec_prefs: "Préférences de site",
      pref_empty: "Aucune préférence définie",
      badge_last: "Dernier utilisé",
      lbl_always_direct: "Toujours utiliser ce format (sans panneau)",
      pre_copied_hint: "Pré-copié (dernier utilisé) :",
      toast_pref_saved: "Préférence enregistrée",
      toast_pref_cleared: "Préférence effacée",
      lbl_toast_jump: "Saut de notification",
      desc_toast_jump: "En activant, cliquez ou survolez la notification pour ouvrir la liste de sauts.",
      lbl_toast_action: "Déclencheur",
      opt_click: "Clic",
      opt_hover: "Survol",
      sec_jump_links: "Liens de saut",
      ph_link_name: "Nom du site",
      ph_link_url: "URL (https://...)",
      btn_add_link: "Ajouter un lien",
      empty_links: "Aucun lien de saut",
      toast_link_added: "Lien ajouté",
      toast_link_deleted: "Supprimé",
      lbl_edit: "Modifier",
      lbl_done: "Terminer",
      lbl_cancel: "Annuler",
      toast_input_focus_warn: "⌨️ Champ de texte actif — appuyez à nouveau sur le raccourci pour copier l'URL de cette page",
    },
    ru: {
      title: "Конвертер ссылок",
      orig: "Исходная ссылка",
      orig_clean: "Исходная ссылка (очищена)",
      to: "в",
      add_rule_prompt: "➕ Добавить правило для сайта",
      manage_btn: "⚙️ Настройки",
      settings_title: "Настройки и правила",
      sec_rules: "Пользовательские правила",
      sec_keys: "Горячие клавиши",
      ph_src: "Исходный домен (напр.: youtube.com)",
      ph_tgt: "Целевой домен (напр.: yewtu.be)",
      btn_add: "Добавить",
      btn_back: "← Назад",
      lbl_trigger: "Клавиша двойного нажатия",
      lbl_shortcut: "Глобальный ярлык",
      empty_rules: "Нет пользовательских правил",
      rec_press: "Нажмите клавишу… (Esc для отмены)",
      rec_none: "Нет (нажмите для настройки)",
      toast_copied: "Скопировано",
      toast_added: "Правило добавлено",
      toast_key_updated: "Клавиша обновлена",
      toast_key_cleared: "Ярлык удалён",
      desc_trigger: "Дважды быстро нажмите эту клавишу вне текстового поля. Если есть только одна цель преобразования, ссылка копируется напрямую; если несколько — открывается панель.",
      desc_shortcut: "Задайте комбинацию клавиш (напр., Ctrl+Shift+L) для той же логики умного копирования. Нажмите Backspace или Delete во время записи, чтобы сбросить ярлык.",
      desc_rules: "Правила сопоставляются по домену. Добавьте пару источник → цель, чтобы конвертировать любые ссылки на этом домене. Пользовательские правила применяются поверх встроенных.",
      sec_prefs: "Настройки сайта",
      pref_empty: "Настройки не заданы",
      badge_last: "Последнее использование",
      lbl_always_direct: "Всегда использовать этот формат (без панели)",
      pre_copied_hint: "Предварительно скопировано (последнее использование):",
      toast_pref_saved: "Настройка сохранена",
      toast_pref_cleared: "Настройка сброшена",
      lbl_toast_jump: "Прыжок из уведомления",
      desc_toast_jump: "При активации клик или наведение на уведомление открывает список переходов.",
      lbl_toast_action: "Триггер",
      opt_click: "Клик",
      opt_hover: "Наведение",
      sec_jump_links: "Ссылки для перехода",
      ph_link_name: "Название сайта",
      ph_link_url: "URL (https://...)",
      btn_add_link: "Добавить ссылку",
      empty_links: "Нет ссылок для перехода",
      toast_link_added: "Ссылка добавлена",
      toast_link_deleted: "Удалено",
      lbl_edit: "Изменить",
      lbl_done: "Готово",
      lbl_cancel: "Отмена",
      toast_input_focus_warn: "⌨️ Фокус в поле ввода — нажмите сочетание клавиш ещё раз, чтобы скопировать URL страницы",
    },
  };

  const CUSTOM_LANG_INSTRUCTIONS = `1. Click 「📤 Export」 to download the JSON template.
2. Open the file and translate only the VALUES (not the keys).
3. Set the "name" field to your language name.
4. Click 「📥 Import」 to apply.

English:    Export → translate the values → Import
Deutsch:    Exportieren → Werte übersetzen → Importieren
Français:   Exporter → traduire les valeurs → Importer
Español:    Exportar → traducir los valores → Importar
Italiano:   Esporta → traduci i valori → Importa
Português:  Exportar → traduzir os valores → Importar
Русский:    Экспорт → перевести значения → Импорт
Українська: Експорт → перекласти значення → Імпорт
ภาษาไทย:   ส่งออก → แปลค่า → นำเข้า
Türkçe:     Dışa aktar → değerleri çevir → İçe aktar
Polski:     Eksportuj → przetłumacz wartości → Importuj
Čeština:    Exportovat → přeložit hodnoty → Importovat
Română:     Exportați → traduceți valorile → Importați
Magyar:     Exportálás → értékek fordítása → Importálás
Ελληνικά:   Εξαγωγή → μετάφραση τιμών → Εισαγωγή
العربية:    تصدير ← ترجمة القيم ← استيراد
עברית:      ייצוא ← תרגום הערכים ← ייבוא
فارسی:      صادر کردن ← ترجمه مقادیر ← وارد کردن
हिन्दी:     निर्यात → मान अनुवाद करें → आयात
বাংলা:      রপ্তানি → মান অনুবাদ করুন → আমদানি
Indonesia:  Ekspor → terjemahkan nilai → Impor
Melayu:     Eksport → terjemah nilai → Import
Filipino:   I-export → isalin ang mga halaga → I-import
Tiếng Việt: Xuất → dịch các giá trị → Nhập
Nederlands: Exporteren → waarden vertalen → Importeren
Svenska:    Exportera → översätt värdena → Importera
Kiswahili:  Hamisha → tafsiri maadili → Ingiza`;

  const DEFAULT_RULES = [
    { source: "twitter.com", target: "fxtwitter.com", label: "fxtwitter" },
    { source: "twitter.com", target: "vxtwitter.com", label: "vxtwitter" },
    { source: "twitter.com", target: "fixupx.com", label: "fixupx" },
    { source: "twitter.com", target: "cunnyx.com", label: "cunnyx" },
    { source: "twitter.com", target: "fixvx.com", label: "fixvx" },
    { source: "x.com", target: "fxtwitter.com", label: "fxtwitter" },
    { source: "x.com", target: "vxtwitter.com", label: "vxtwitter" },
    { source: "x.com", target: "fixupx.com", label: "fixupx" },
    { source: "x.com", target: "cunnyx.com", label: "cunnyx" },
    { source: "x.com", target: "fixvx.com", label: "fixvx" },
    { source: "fxtwitter.com", target: "x.com", label: "x.com" },
    { source: "vxtwitter.com", target: "x.com", label: "x.com" },
    { source: "fixupx.com", target: "x.com", label: "x.com" },
    { source: "cunnyx.com", target: "x.com", label: "x.com" },
    { source: "fixvx.com", target: "x.com", label: "x.com" },
    { source: "fxtwitter.com", target: "vxtwitter.com", label: "vxtwitter" },
    { source: "fxtwitter.com", target: "fixupx.com", label: "fixupx" },
    { source: "fxtwitter.com", target: "cunnyx.com", label: "cunnyx" },
    { source: "fxtwitter.com", target: "fixvx.com", label: "fixvx" },
    { source: "vxtwitter.com", target: "fxtwitter.com", label: "fxtwitter" },
    { source: "vxtwitter.com", target: "fixupx.com", label: "fixupx" },
    { source: "vxtwitter.com", target: "cunnyx.com", label: "cunnyx" },
    { source: "vxtwitter.com", target: "fixvx.com", label: "fixvx" },
    { source: "fixupx.com", target: "fxtwitter.com", label: "fxtwitter" },
    { source: "fixupx.com", target: "vxtwitter.com", label: "vxtwitter" },
    { source: "fixupx.com", target: "cunnyx.com", label: "cunnyx" },
    { source: "fixupx.com", target: "fixvx.com", label: "fixvx" },
    { source: "cunnyx.com", target: "fxtwitter.com", label: "fxtwitter" },
    { source: "cunnyx.com", target: "vxtwitter.com", label: "vxtwitter" },
    { source: "cunnyx.com", target: "fixupx.com", label: "fixupx" },
    { source: "cunnyx.com", target: "fixvx.com", label: "fixvx" },
    { source: "fixvx.com", target: "fxtwitter.com", label: "fxtwitter" },
    { source: "fixvx.com", target: "vxtwitter.com", label: "vxtwitter" },
    { source: "fixvx.com", target: "fixupx.com", label: "fixupx" },
    { source: "fixvx.com", target: "cunnyx.com", label: "cunnyx" },

    { source: "reddit.com", target: "old.reddit.com", label: "old.reddit" },
    { source: "reddit.com", target: "vxreddit.com", label: "vxreddit" },
    { source: "reddit.com", target: "rxddit.com", label: "rxddit" },
    { source: "reddit.com", target: "rxyddit.com", label: "rxyddit" },
    { source: "old.reddit.com", target: "reddit.com", label: "reddit" },
    { source: "old.reddit.com", target: "vxreddit.com", label: "vxreddit" },
    { source: "old.reddit.com", target: "rxddit.com", label: "rxddit" },
    { source: "old.reddit.com", target: "rxyddit.com", label: "rxyddit" },
    { source: "vxreddit.com", target: "reddit.com", label: "reddit" },
    { source: "vxreddit.com", target: "old.reddit.com", label: "old.reddit" },
    { source: "vxreddit.com", target: "rxddit.com", label: "rxddit" },
    { source: "vxreddit.com", target: "rxyddit.com", label: "rxyddit" },
    { source: "rxddit.com", target: "reddit.com", label: "reddit" },
    { source: "rxddit.com", target: "vxreddit.com", label: "vxreddit" },
    { source: "rxddit.com", target: "old.reddit.com", label: "old.reddit" },
    { source: "rxddit.com", target: "rxyddit.com", label: "rxyddit" },
    { source: "rxyddit.com", target: "reddit.com", label: "reddit" },
    { source: "rxyddit.com", target: "vxreddit.com", label: "vxreddit" },
    { source: "rxyddit.com", target: "rxddit.com", label: "rxddit" },
    { source: "rxyddit.com", target: "old.reddit.com", label: "old.reddit" },

    { source: "instagram.com",    target: "kkinstagram.com",  label: "kkinstagram"  },
    { source: "instagram.com",    target: "vxinstagram.com",  label: "vxinstagram"  },
    { source: "instagram.com",    target: "ddinstagram.com",  label: "ddinstagram"  },
    { source: "instagram.com",    target: "uuinstagram.com",  label: "uuinstagram"  },
    { source: "instagram.com",    target: "eeinstagram.com",  label: "eeinstagram"  },
    { source: "instagram.com",    target: "instagramez.com",  label: "InstagramEZ"  },
    { source: "kkinstagram.com",  target: "instagram.com",    label: "instagram"    },
    { source: "kkinstagram.com",  target: "vxinstagram.com",  label: "vxinstagram"  },
    { source: "kkinstagram.com",  target: "ddinstagram.com",  label: "ddinstagram"  },
    { source: "kkinstagram.com",  target: "uuinstagram.com",  label: "uuinstagram"  },
    { source: "kkinstagram.com",  target: "eeinstagram.com",  label: "eeinstagram"  },
    { source: "kkinstagram.com",  target: "instagramez.com",  label: "InstagramEZ"  },
    { source: "vxinstagram.com",  target: "instagram.com",    label: "instagram"    },
    { source: "vxinstagram.com",  target: "kkinstagram.com",  label: "kkinstagram"  },
    { source: "vxinstagram.com",  target: "ddinstagram.com",  label: "ddinstagram"  },
    { source: "vxinstagram.com",  target: "uuinstagram.com",  label: "uuinstagram"  },
    { source: "vxinstagram.com",  target: "eeinstagram.com",  label: "eeinstagram"  },
    { source: "vxinstagram.com",  target: "instagramez.com",  label: "InstagramEZ"  },
    { source: "ddinstagram.com",  target: "instagram.com",    label: "instagram"    },
    { source: "ddinstagram.com",  target: "kkinstagram.com",  label: "kkinstagram"  },
    { source: "ddinstagram.com",  target: "vxinstagram.com",  label: "vxinstagram"  },
    { source: "ddinstagram.com",  target: "uuinstagram.com",  label: "uuinstagram"  },
    { source: "ddinstagram.com",  target: "eeinstagram.com",  label: "eeinstagram"  },
    { source: "ddinstagram.com",  target: "instagramez.com",  label: "InstagramEZ"  },
    { source: "uuinstagram.com",  target: "instagram.com",    label: "instagram"    },
    { source: "uuinstagram.com",  target: "kkinstagram.com",  label: "kkinstagram"  },
    { source: "uuinstagram.com",  target: "vxinstagram.com",  label: "vxinstagram"  },
    { source: "uuinstagram.com",  target: "ddinstagram.com",  label: "ddinstagram"  },
    { source: "uuinstagram.com",  target: "eeinstagram.com",  label: "eeinstagram"  },
    { source: "uuinstagram.com",  target: "instagramez.com",  label: "InstagramEZ"  },
    { source: "eeinstagram.com",  target: "instagram.com",    label: "instagram"    },
    { source: "eeinstagram.com",  target: "kkinstagram.com",  label: "kkinstagram"  },
    { source: "eeinstagram.com",  target: "vxinstagram.com",  label: "vxinstagram"  },
    { source: "eeinstagram.com",  target: "ddinstagram.com",  label: "ddinstagram"  },
    { source: "eeinstagram.com",  target: "uuinstagram.com",  label: "uuinstagram"  },
    { source: "eeinstagram.com",  target: "instagramez.com",  label: "InstagramEZ"  },
    { source: "instagramez.com",  target: "instagram.com",    label: "instagram"    },
    { source: "instagramez.com",  target: "kkinstagram.com",  label: "kkinstagram"  },
    { source: "instagramez.com",  target: "vxinstagram.com",  label: "vxinstagram"  },
    { source: "instagramez.com",  target: "ddinstagram.com",  label: "ddinstagram"  },
    { source: "instagramez.com",  target: "uuinstagram.com",  label: "uuinstagram"  },
    { source: "instagramez.com",  target: "eeinstagram.com",  label: "eeinstagram"  },

    { source: "tiktok.com", target: "vxtiktok.com", label: "vxtiktok" },
    { source: "tiktok.com", target: "tnktok.com", label: "tnktok" },
    { source: "tiktok.com", target: "tiktxk.com", label: "tiktxk" },
    { source: "tiktok.com", target: "tfxktok.com", label: "tfxktok" },
    { source: "tiktok.com", target: "tiktokez.com", label: "TikTokEZ" },
    { source: "vxtiktok.com", target: "tiktok.com", label: "tiktok" },
    { source: "vxtiktok.com", target: "tnktok.com", label: "tnktok" },
    { source: "vxtiktok.com", target: "tiktxk.com", label: "tiktxk" },
    { source: "vxtiktok.com", target: "tfxktok.com", label: "tfxktok" },
    { source: "tnktok.com", target: "tiktok.com", label: "tiktok" },
    { source: "tnktok.com", target: "vxtiktok.com", label: "vxtiktok" },
    { source: "tnktok.com", target: "tiktxk.com", label: "tiktxk" },
    { source: "tnktok.com", target: "tfxktok.com", label: "tfxktok" },
    { source: "tiktxk.com", target: "tiktok.com", label: "tiktok" },
    { source: "tiktxk.com", target: "vxtiktok.com", label: "vxtiktok" },
    { source: "tiktxk.com", target: "tnktok.com", label: "tnktok" },
    { source: "tiktxk.com", target: "tfxktok.com", label: "tfxktok" },
    { source: "tfxktok.com", target: "tiktok.com", label: "tiktok" },
    { source: "tfxktok.com", target: "vxtiktok.com", label: "vxtiktok" },
    { source: "tfxktok.com", target: "tnktok.com", label: "tnktok" },
    { source: "tfxktok.com", target: "tiktxk.com", label: "tiktxk" },
    { source: "tiktokez.com", target: "tiktok.com", label: "tiktok" },
    { source: "tiktokez.com", target: "vxtiktok.com", label: "vxtiktok" },

    { source: "threads.com", target: "fixthreads.net", label: "fixthreads" },
    { source: "threads.com", target: "fixthreads.seria.moe", label: "fixthreads(moe)" },
    { source: "threads.net", target: "fixthreads.net", label: "fixthreads" },
    { source: "threads.net", target: "fixthreads.seria.moe", label: "fixthreads(moe)" },

    { source: "tumblr.com", target: "tpmblr.com", label: "tpmblr" },
    { source: "tpmblr.com", target: "tumblr.com", label: "tumblr" },

    { source: "pixiv.net", target: "www.phixiv.net", label: "phixiv" },
    { source: "www.phixiv.net", target: "pixiv.net", label: "pixiv" },

    { source: "bilibili.com", target: "vxbilibili.com", label: "vxbilibili" },
    { source: "b23.tv", target: "vxbilibili.com", label: "vxbilibili" },
    { source: "vxbilibili.com", target: "bilibili.com", label: "bilibili" },

    { source: "facebook.com", target: "facebed.com", label: "facebed" },
    { source: "facebed.com", target: "facebook.com", label: "facebook" },

    { source: "bsky.app", target: "bskyx.app", label: "bskyx" },
    { source: "bsky.app", target: "bsyy.app", label: "bsyy" },
    { source: "bsky.app", target: "bskye.app", label: "bskye" },
    { source: "bsky.app", target: "vxbsky.app", label: "vxbsky" },
    { source: "bskyx.app", target: "bsky.app", label: "bsky" },
    { source: "bskyx.app", target: "bsyy.app", label: "bsyy" },
    { source: "bskyx.app", target: "bskye.app", label: "bskye" },
    { source: "bskyx.app", target: "vxbsky.app", label: "vxbsky" },
    { source: "bsyy.app", target: "bsky.app", label: "bsky" },
    { source: "bsyy.app", target: "bskyx.app", label: "bskyx" },
    { source: "bsyy.app", target: "bskye.app", label: "bskye" },
    { source: "bsyy.app", target: "vxbsky.app", label: "vxbsky" },
    { source: "bskye.app", target: "bsky.app", label: "bsky" },
    { source: "bskye.app", target: "bskyx.app", label: "bskyx" },
    { source: "bskye.app", target: "bsyy.app", label: "bsyy" },
    { source: "bskye.app", target: "vxbsky.app", label: "vxbsky" },
    { source: "vxbsky.app", target: "bsky.app", label: "bsky" },
    { source: "vxbsky.app", target: "bskyx.app", label: "bskyx" },
    { source: "vxbsky.app", target: "bsyy.app", label: "bsyy" },
    { source: "vxbsky.app", target: "bskye.app", label: "bskye" },
  ];

  let lastPressTime = 0;
  let lastInputWarnTime = 0;
  const INPUT_WARN_WINDOW = 2500;
  let _configCache = null;
  function getConfig() {
    if (!_configCache) _configCache = GM_getValue("flcu_config", DEFAULT_CONFIG);
    return { ...DEFAULT_CONFIG, ..._configCache };
  }
  function saveConfig(c) {
    _configCache = { ...DEFAULT_CONFIG, ...c };
    GM_setValue("flcu_config", _configCache);
  }

  GM_addStyle(`
        #flcu-overlay {
            position: fixed; inset: 0;
            background: rgba(0,0,0,.65); z-index: 2147483647;
            display: flex; align-items: center; justify-content: center;
            font-family: sans-serif;
            overscroll-behavior: contain;
            animation: flcu-bg-in .22s ease-out;
        }
        #flcu-overlay.flcu-closing { animation: flcu-bg-out .18s ease-in forwards; }
        #flcu-menu {
            background: #2f3136; color: #dcddde;
            width: 400px; border-radius: 10px; border: 1px solid #202225;
            box-shadow: 0 12px 32px rgba(0,0,0,.6);
            overflow: hidden; display: flex; flex-direction: column;
            animation: flcu-menu-spring .42s cubic-bezier(.22,.68,0,1.15) forwards;
            position: relative;
        }
        #flcu-menu.flcu-closing { animation: flcu-menu-out .18s ease-in forwards; }
        #flcu-header {
            background: #202225; padding: 13px 18px;
            font-size: 15px; font-weight: bold; color: #fff;
            display: flex; justify-content: space-between; align-items: center;
            border-bottom: 1px solid #111214;
        }
        .flcu-icon-btn { cursor: pointer; padding: 4px; border-radius: 4px; transition: background .2s; }
        .flcu-icon-btn:hover { background: rgba(255,255,255,0.1); color: #fff; }

        .flcu-content {
            max-height: 65vh; overflow-y: auto; padding: 12px 0; overscroll-behavior: contain;
        }

        .flcu-item {
            width: calc(100% - 24px);
            margin: 0 12px 8px 12px;
            padding: 13px 15px;
            background: rgba(79, 84, 92, 0.16);
            border: 1px solid rgba(79, 84, 92, 0.3);
            border-radius: 7px;
            text-align: left; font-size: 14px; color: #dcddde; cursor: pointer;
            display: flex; align-items: center;
            transition: all .2s ease;
            position: relative; overflow: hidden;
            animation: flcu-item-in .24s ease-out both;
            animation-delay: var(--flcu-i, 60ms);
        }
        .flcu-rip {
            position: absolute; border-radius: 50%;
            width: 8px; height: 8px; margin: -4px;
            background: rgba(88,101,242,.35);
            animation: flcu-rip .45s ease-out forwards;
            pointer-events: none;
        }
        .flcu-item:hover {
            background: #40444b;
            border-color: #5865F2;
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.15);
        }
        .flcu-item:active { transform: translateY(0); box-shadow: none; }

        .flcu-prefix {
            font-weight: bold; color: #5865F2; margin-right: 12px;
            min-width: 24px; text-align: left; display: inline-block;
        }

        .flcu-copy-hint {
            font-size: 12px; color: #b9bbbe; margin-left: auto;
            opacity: 0; transition: opacity .2s;
            background: rgba(0, 0, 0, 0.2); padding: 4px 8px; border-radius: 4px;
        }
        .flcu-item:hover .flcu-copy-hint { opacity: 1; color: #fff; }

        .flcu-item-content {
            flex: 1; min-width: 0;
            display: flex; flex-direction: column; text-align: left;
        }
        .flcu-item-title {
            font-size: 14px; font-weight: bold; color: #dcddde;
            white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
        }
        .flcu-item-desc {
            font-size: 12px; color: #8e9297; margin-top: 2px;
            white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
        }

        #flcu-manager {
            padding: 12px; background: #36393f;
            display: flex; flex-direction: column; gap: 8px;
            max-height: 82vh; overflow-y: auto; overscroll-behavior: contain;
        }

        .flcu-sec-title {
            font-size: 13px; font-weight: bold; color: #fff; margin-bottom: 8px;
            display: flex; align-items: center; gap: 8px;
        }
        .flcu-sec-sub {
            font-size: 11px; color: #8e9297; text-transform: uppercase;
            margin-top: 15px; border-top: 1px dashed #4f545c; padding-top: 15px;
        }

        .flcu-input-group { display: flex; gap: 8px; margin-bottom: 8px; }
        .flcu-input {
            flex: 1; background: #202225; border: 1px solid #202225;
            color: #dcddde; padding: 9px 10px; border-radius: 5px; font-size: 13px;
        }
        .flcu-input:focus { border-color: #5865F2; outline: none; }

        .flcu-rule-list {
            max-height: 130px; overflow-y: auto; background: #2f3136;
            border-radius: 5px; padding: 4px; border: 1px solid #202225;
            overscroll-behavior: contain;
        }
        .flcu-rule-item {
            display: flex; justify-content: space-between; align-items: center;
            font-size: 13px; color: #b9bbbe; padding: 7px 9px;
            border-bottom: 1px solid #36393f;
        }
        .flcu-rule-item:last-child { border-bottom: none; }
        .flcu-empty-msg { font-size: 13px; color: #72767d; text-align: center; padding: 16px; }

        .flcu-key-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
        .flcu-key-label { font-size: 13px; color: #b9bbbe; }
        .flcu-key-recorder {
            background: #202225; border: 1px solid #4f545c; color: #a1a3a7;
            padding: 5px 12px; border-radius: 4px; font-size: 12px; cursor: pointer;
            text-align: center; min-width: 80px; transition: all .2s;
        }
        .flcu-key-recorder:hover { border-color: #b9bbbe; color: #fff; }
        .flcu-key-recorder.recording {
            border-color: #ed4245; color: #ed4245; background: rgba(237, 66, 69, 0.05);
            animation: pulse 1.5s infinite;
        }

        .flcu-footer {
            background: #292b2f; padding: 9px 18px;
            display: flex; justify-content: space-between; align-items: center;
            border-top: 1px solid #202225;
        }

        .flcu-btn {
            padding: 7px 14px; border-radius: 4px; border: none; cursor: pointer;
            font-size: 13px; font-weight: bold; color: white;
        }
        .flcu-btn-primary { background: #5865F2; }
        .flcu-btn-primary:hover { background: #4752C4; }
        .flcu-btn-ghost { background: transparent; color: #b9bbbe; padding-left: 0; }
        .flcu-btn-ghost:hover { color: #fff; }

        .flcu-lang-switch { display: flex; flex-wrap: wrap; gap: 6px; justify-content: flex-end; max-width: 200px; }
        .flcu-lang-item { font-size: 11px; color: #4f545c; cursor: pointer; font-weight: bold; transition: color .2s; }
        .flcu-lang-item:hover, .flcu-lang-item.active { color: #8e9297; }

        .flcu-content::-webkit-scrollbar,
        #flcu-manager::-webkit-scrollbar,
        .flcu-rule-list::-webkit-scrollbar,
        .flcu-custom-instructions::-webkit-scrollbar,
        #flcu-tj-panel::-webkit-scrollbar { width: 4px; }
        .flcu-content::-webkit-scrollbar-track,
        #flcu-manager::-webkit-scrollbar-track,
        .flcu-rule-list::-webkit-scrollbar-track,
        .flcu-custom-instructions::-webkit-scrollbar-track,
        #flcu-tj-panel::-webkit-scrollbar-track { background: transparent; }
        .flcu-content::-webkit-scrollbar-thumb,
        #flcu-manager::-webkit-scrollbar-thumb,
        .flcu-rule-list::-webkit-scrollbar-thumb,
        .flcu-custom-instructions::-webkit-scrollbar-thumb,
        #flcu-tj-panel::-webkit-scrollbar-thumb {
            background: #4f545c; border-radius: 2px;
        }
        .flcu-content::-webkit-scrollbar-thumb:hover,
        #flcu-manager::-webkit-scrollbar-thumb:hover,
        .flcu-rule-list::-webkit-scrollbar-thumb:hover {
            background: #72767d;
        }

        .flcu-toast {
            position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%);
            background: #5865F2; color: #fff; padding: 9px 18px 12px;
            border-radius: 6px; font-size: 13px; opacity: 0;
            z-index: 2147483647; pointer-events: none; overflow: hidden;
        }
        .flcu-toast.show   { animation: flcu-toast-in .38s cubic-bezier(.22,.68,0,1.2) forwards; }
        .flcu-toast.hiding { animation: flcu-toast-out .22s ease-in forwards; }
        .flcu-toast-bar {
            position: absolute; bottom: 0; left: 0;
            height: 3px; width: 100%;
            background: rgba(255,255,255,.5);
            border-radius: 0 0 6px 6px;
            transform-origin: left;
            animation: flcu-bar 2s linear forwards;
        }
        @keyframes flcu-fadein { from { opacity: 0; transform: scale(.95); } to { opacity: 1; transform: scale(1); } }
        @keyframes pulse { 0% { opacity: 1; } 50% { opacity: 0.6; } 100% { opacity: 1; } }
        @keyframes flcu-bg-in       { from { opacity: 0; }                                              to { opacity: 1; } }
        @keyframes flcu-bg-out      { from { opacity: 1; }                                              to { opacity: 0; } }
        @keyframes flcu-menu-spring { 0%  { opacity:0; transform:scale(.84) translateY(20px); }
                                      55% { opacity:1; transform:scale(1.04) translateY(-4px); }
                                      78% { transform:scale(.98) translateY(2px); }
                                      100%{ transform:scale(1) translateY(0); } }
        @keyframes flcu-menu-out    { to  { opacity:0; transform:scale(.92) translateY(12px); } }
        @keyframes flcu-item-in     { from { opacity:0; transform:translateY(7px); } to { opacity:1; transform:none; } }
        @keyframes flcu-rip         { to  { transform:scale(32); opacity:0; } }
        @keyframes flcu-toast-in    { 0%  { opacity:0; transform:translateX(-50%) translateY(14px) scale(.92); }
                                      60% { opacity:1; transform:translateX(-50%) translateY(-3px) scale(1.02); }
                                      100%{ opacity:1; transform:translateX(-50%) translateY(0) scale(1); } }
        @keyframes flcu-toast-out   { to  { opacity:0; transform:translateX(-50%) translateY(10px) scale(.94); } }
        @keyframes flcu-bar         { to  { transform:scaleX(0); } }

        #flcu-custom-panel {
            padding: 16px 20px; background: #36393f;
            display: flex; flex-direction: column; gap: 12px;
        }
        .flcu-custom-instructions {
            font-size: 12px; color: #b9bbbe;
            background: #2f3136; border-radius: 4px;
            padding: 10px 12px; white-space: pre-wrap;
            font-family: monospace; max-height: 200px;
            overflow-y: auto; line-height: 1.6;
            border: 1px solid #202225;
            overscroll-behavior: contain;
        }
        .flcu-custom-btns { display: flex; gap: 8px; flex-wrap: wrap; }
        .flcu-btn-import {
            background: #43b581; color: #fff;
            padding: 6px 12px; border-radius: 4px;
            border: none; cursor: pointer;
            font-size: 13px; font-weight: bold; display: inline-block;
        }
        .flcu-btn-import:hover { background: #3ca374; }
        .flcu-import-status { font-size: 12px; color: #ed4245; min-height: 16px; }
        .flcu-custom-active {
            display: flex; align-items: center; justify-content: space-between;
            background: rgba(67,181,129,0.12); border: 1px solid rgba(67,181,129,0.3);
            border-radius: 4px; padding: 6px 10px;
        }
        .flcu-custom-active-name { font-size: 13px; color: #43b581; }
        .flcu-btn-revoke {
            background: transparent; border: 1px solid #ed4245;
            color: #ed4245; border-radius: 4px; padding: 3px 8px;
            font-size: 12px; cursor: pointer; transition: background .2s;
        }
        .flcu-btn-revoke:hover { background: rgba(237,66,69,0.15); }
        .flcu-lang-item[data-l="__custom"] {
            font-size: 11px; line-height: 1;
            border: 1px solid #4f545c;
            border-radius: 10px;
            padding: 2px 6px;
            color: #8e9297;
            transition: border-color .2s, color .2s, background .2s;
        }
        .flcu-lang-item[data-l="__custom"]:hover,
        .flcu-lang-item[data-l="__custom"].active {
            border-color: #5865F2;
            color: #fff;
            background: rgba(88,101,242,0.15);
        }
        
        .flcu-desc-text {
            font-size: 12px; color: #72767d; line-height: 1.5;
            margin: 2px 0 6px 0; word-break: break-word;
        }

        .flcu-precopy-hint {
            font-size: 12px; color: #43b581; margin: 0 12px 6px 12px;
            padding: 5px 10px; background: rgba(67,181,129,0.08);
            border-radius: 4px; border-left: 2px solid #43b581;
        }
        .flcu-badge-last {
            font-size: 10px; background: rgba(88,101,242,0.25);
            color: #8ea1e1; border-radius: 10px; padding: 1px 7px;
            margin-left: 6px; vertical-align: middle;
        }
        .flcu-pref-bar {
            margin: 6px 12px 8px 12px;
            padding: 9px 11px;
            background: rgba(79,84,92,0.12);
            border: 1px dashed #4f545c;
            border-radius: 6px;
        }
        .flcu-pref-label {
            display: flex; align-items: center; gap: 8px;
            font-size: 13px; color: #b9bbbe; cursor: pointer;
            user-select: none;
        }
        .flcu-pref-check { accent-color: #5865F2; cursor: pointer; }

        .flcu-toast { cursor: default; }
        .flcu-toast.flcu-toast-jumpable { cursor: pointer; pointer-events: auto; }
        .flcu-toast-jump-hint { opacity: 0.7; }

        .flcu-toast.flcu-toast-warn {
            background: rgba(230, 126, 34, 0.18);
            border: 2px dashed rgba(230, 126, 34, 0.85);
            color: #f0a060;
            backdrop-filter: blur(4px);
            animation: flcu-toast-in .38s cubic-bezier(.22,.68,0,1.2) forwards;
        }

        #flcu-jump-popup {
            position: fixed; bottom: 70px; left: 50%;
            transform: translateX(-50%);
            background: #2f3136; border: 1px solid #202225;
            border-radius: 8px; box-shadow: 0 8px 24px rgba(0,0,0,.5);
            min-width: 220px; max-width: 320px;
            z-index: 2147483647; overflow: hidden;
            animation: flcu-fadein .15s ease-out;
        }
        .flcu-jump-item {
            display: flex; align-items: center; gap: 10px;
            padding: 11px 15px; cursor: pointer;
            transition: background .15s;
            border-bottom: 1px solid #202225;
        }
        .flcu-jump-item:last-child { border-bottom: none; }
        .flcu-jump-item:hover { background: #40444b; }
        .flcu-jump-icon { width: 16px; height: 16px; border-radius: 3px; flex-shrink: 0; }
        .flcu-jump-name { flex: 1; font-size: 13px; color: #dcddde; }
        .flcu-jump-arrow { font-size: 12px; color: #72767d; }

        .flcu-toggle-wrap {
            position: relative; display: inline-block;
            width: 36px; height: 20px; flex-shrink: 0;
            cursor: pointer; border-radius: 20px;
        }
        .flcu-toggle-wrap input { display: none; }
        .flcu-toggle-slider {
            position: absolute; inset: 0;
            background: #4f545c; border-radius: 20px; transition: .2s;
            pointer-events: none;
        }
        .flcu-toggle-slider::before {
            content: ""; position: absolute; height: 14px; width: 14px;
            left: 3px; bottom: 3px; background: #fff;
            border-radius: 50%; transition: .2s;
        }
        .flcu-toggle-wrap.flcu-on .flcu-toggle-slider { background: #5865F2; }
        .flcu-toggle-wrap.flcu-on .flcu-toggle-slider::before { transform: translateX(16px); }

        .flcu-action-group { display: flex; gap: 4px; }
        .flcu-action-btn {
            padding: 4px 12px; border-radius: 4px; border: 1px solid #4f545c;
            background: transparent; color: #8e9297; font-size: 12px;
            cursor: pointer; transition: all .15s;
        }
        .flcu-action-btn.active, .flcu-action-btn:hover {
            background: rgba(88,101,242,0.2); border-color: #5865F2; color: #fff;
        }

        .flcu-jump-item { cursor: default; }
        .flcu-jump-btn {
            display: flex; align-items: center; justify-content: center;
            width: 28px; height: 28px; border-radius: 5px; border: 1px solid #4f545c;
            background: transparent; color: #8e9297; cursor: pointer; flex-shrink: 0;
            transition: all .15s;
        }
        .flcu-jump-btn:hover { background: rgba(88,101,242,0.2); border-color: #5865F2; color: #fff; }
        .flcu-jump-btn-spa { border-color: #3a3d44; color: #72767d; }
        .flcu-jump-btn-spa:hover { background: rgba(67,181,129,0.2); border-color: #43b581; color: #43b581; }

        .flcu-section-advanced > .flcu-section-hdr { background: rgba(79,84,92,0.10); }
        .flcu-section-advanced > .flcu-section-hdr:hover { background: rgba(79,84,92,0.20); }
        .flcu-adv-badge {
            font-size: 10px; font-weight: normal; color: #72767d;
            background: rgba(79,84,92,0.3); border-radius: 4px;
            padding: 1px 6px; margin-left: 8px; letter-spacing: 0.3px;
        }

        .flcu-nav-btn {
            display: flex; justify-content: space-between; align-items: center;
            padding: 9px 12px; background: rgba(79,84,92,0.15);
            border: 1px solid rgba(79,84,92,0.3); border-radius: 6px;
            cursor: pointer; font-size: 13px; color: #dcddde; transition: all .2s;
        }
        .flcu-nav-btn:hover { background: #40444b; border-color: #5865F2; }

        .flcu-jl-row { gap: 6px; flex-wrap: nowrap; }
        .flcu-jl-icon { width: 16px; height: 16px; border-radius: 3px; flex-shrink: 0; }

        .flcu-section { border: 1px solid #3a3d44; border-radius: 8px; overflow: hidden; flex-shrink: 0; }
        .flcu-section-hdr {
            display: flex; justify-content: space-between; align-items: center;
            padding: 11px 14px; cursor: pointer; user-select: none;
            background: rgba(79,84,92,0.18); transition: background .15s;
        }
        .flcu-section-hdr:hover { background: rgba(79,84,92,0.32); }
        .flcu-section-hdr-title {
            font-size: 13px; font-weight: bold; color: #dcddde;
            display: flex; align-items: center; gap: 8px;
        }
        .flcu-section-chevron {
            font-size: 11px; color: #72767d;
            transition: transform .2s; display: inline-block;
        }
        .flcu-section.open > .flcu-section-hdr .flcu-section-chevron { transform: rotate(90deg); }
        .flcu-section-body {
            display: none; padding: 14px;
            border-top: 1px solid #3a3d44;
            background: #36393f;
            display: none; flex-direction: column; gap: 10px;
        }
        .flcu-section.open > .flcu-section-body { display: flex; }
    `);

  function getUserRules() {
    return GM_getValue("user_rules", []);
  }
  function addUserRule(s, tgt) {
    const rules = getUserRules();
    if (rules.some((r) => r.source === s && r.target === tgt)) return false;
    const label = tgt.replace(/^www\./, "").split(".")[0];
    rules.push({ source: s, target: tgt, label });
    GM_setValue("user_rules", rules);
    return true;
  }
  function removeUserRule(i) {
    const rules = getUserRules();
    rules.splice(i, 1);
    GM_setValue("user_rules", rules);
  }

  function getLastUsed() {
    return GM_getValue("flcu_last_used", {});
  }
  function setLastUsedForHost(host, targetHostname) {
    const lu = getLastUsed();
    lu[host] = targetHostname;
    GM_setValue("flcu_last_used", lu);
  }
  function getSitePrefs() {
    return GM_getValue("flcu_site_pref", {});
  }
  function setSitePref(host, targetHostname) {
    const p = getSitePrefs();
    p[host] = targetHostname;
    GM_setValue("flcu_site_pref", p);
  }
  function removeSitePref(host) {
    const p = getSitePrefs();
    delete p[host];
    GM_setValue("flcu_site_pref", p);
  }

  function getToastJumpCfg() {
    return GM_getValue("flcu_toast_jump", { enabled: false, action: "click" });
  }
  function saveToastJumpCfg(cfg) {
    GM_setValue("flcu_toast_jump", cfg);
  }
  function getJumpLinks() {
    return GM_getValue("flcu_jump_links", []);
  }
  function saveJumpLinks(links) {
    GM_setValue("flcu_jump_links", links);
  }
  function genId() {
    return Math.random().toString(36).slice(2, 9);
  }

  function getSectionStates() {
    return GM_getValue("flcu_sections", {});
  }
  function setSectionState(id, open) {
    const s = getSectionStates();
    s[id] = open;
    GM_setValue("flcu_sections", s);
  }

  function escHtml(str) {
    return String(str)
      .replace(/&/g, "&")
      .replace(/</g, "&lt;")
      .replace(/>/g, "&gt;")
      .replace(/"/g, "&quot;");
  }

  function cleanUrl(urlStr) {
    try {
      const url = new URL(urlStr);
      const paramsToRemove = [
        "utm_source",
        "utm_medium",
        "utm_campaign",
        "utm_term",
        "utm_content",
        "utm_id",
        "utm_referrer",
        "fbclid",
        "gclid",
        "igsh",
        "twclid",
        "msclkid",
        "dclid",
        "yclid",
        "gbraid",
        "wbraid",
        "ref",
        "ref_src",
        "sp_ref",
        "sp_url",
        "sxsrf",
        "ved",
        "ei",
        "gs_lcp",
        "oq",
        "aqs",
        "sourceid",
        "ie",
        "client",
        "feature",
        "pp",
        "pbjreload",
        "annotation_id",
        "si",
        "s",
        "openExternalBrowser",
      ];
      paramsToRemove.forEach((p) => url.searchParams.delete(p));
      return url.toString();
    } catch (e) {
      return urlStr;
    }
  }

  function getLang() {
    const cfg = getConfig();
    if (cfg.lang) return cfg.lang;
    const navLang = navigator.language.toLowerCase();
    if (
      navLang.startsWith("zh-tw") ||
      navLang.startsWith("zh-hk") ||
      navLang.startsWith("zh-mo")
    )
      return "zh-TW";
    if (navLang.startsWith("zh")) return "zh-CN";
    if (navLang.startsWith("ja")) return "ja";
    if (navLang.startsWith("ko")) return "ko";
    if (navLang.startsWith("pt")) return "pt-BR";
    if (navLang.startsWith("es")) return "es";
    if (navLang.startsWith("fr")) return "fr";
    if (navLang.startsWith("ru")) return "ru";
    return "en";
  }
  function t(key) {
    const lang = getLang();
    if (lang === "__custom") {
      const custom = GM_getValue("custom_lang", null);
      if (custom && custom[key] !== undefined) return custom[key];
      return TRANSLATIONS["en"][key] ?? key;
    }
    return TRANSLATIONS[lang]?.[key] ?? TRANSLATIONS["en"][key] ?? key;
  }
  function setLang(langCode) {
    const c = getConfig();
    c.lang = langCode;
    saveConfig(c);
  }

  function getUrlInfo() {
    const u = new URL(location.href);
    return { host: u.hostname };
  }
  function getMatchedRules(host) {
    const userRules = getUserRules();
    const seen = new Set();
    return [...DEFAULT_RULES, ...userRules].filter((r) => {
      const matches = host === r.source || host.endsWith("." + r.source);
      if (!matches) return false;
      if (r.target === host) return false;
      if (seen.has(r.target)) return false;
      seen.add(r.target);
      return true;
    });
  }
  function shortcutToString(s) {
    if (!s) return t("rec_none");
    const p = [];
    if (s.ctrl) p.push("Ctrl");
    if (s.alt) p.push("Alt");
    if (s.shift) p.push("Shift");
    if (s.meta) p.push("Win");
    p.push(s.key);
    return p.join(" + ");
  }
  function isInput(el) {
    return ["INPUT", "TEXTAREA"].includes(el.tagName) || el.isContentEditable;
  }

  function createMenu() {
    if (document.getElementById("flcu-overlay")) return;

    const rawUrl = location.href;
    const cleanedUrl = cleanUrl(rawUrl);
    const isCleaned = rawUrl !== cleanedUrl;

    const { host } = getUrlInfo();
    const rules = getMatchedRules(host);

    const overlay = document.createElement("div");
    overlay.id = "flcu-overlay";
    overlay.innerHTML = `
            <div id="flcu-menu">
                <div id="flcu-header">
                    <span>${t("title")}</span>
                    <span class="flcu-icon-btn" id="flcu-close" style="font-size:18px">×</span>
                </div>
                <div class="flcu-content"></div>
                <div class="flcu-footer">
                    <span style="font-size:10px;color:#4f545c">v${typeof GM_info !== "undefined" ? GM_info.script.version : "0.3"}</span>
                    <span class="flcu-icon-btn" id="flcu-settings" style="font-size:12px;color:#b9bbbe">${t("manage_btn")}</span>
                </div>
            </div>
        `;

    document.body.appendChild(overlay);

    overlay._cleanupFI = null;
    const closeOverlay = () => {
      overlay._cleanupFI?.();
      overlay.classList.add("flcu-closing");
      overlay.querySelector("#flcu-menu")?.classList.add("flcu-closing");
      setTimeout(() => overlay.remove(), 190);
    };

    const stopScroll = (e) => {
      const inScrollable = e.target.closest(
        ".flcu-content, .flcu-rule-list, .flcu-custom-instructions, #flcu-manager",
      );
      if (!inScrollable) {
        e.preventDefault();
      }
      e.stopPropagation();
    };
    overlay.addEventListener("wheel", stopScroll, { passive: false });
    overlay.addEventListener("touchmove", stopScroll, { passive: false });

    const menu = overlay.querySelector("#flcu-menu");
    const content = menu.querySelector(".flcu-content");

    let _ripIdx = 0;
    content.addEventListener("mousedown", (e) => {
      const item = e.target.closest(".flcu-item");
      if (!item) return;
      const r = item.getBoundingClientRect();
      const rip = document.createElement("span");
      rip.className = "flcu-rip";
      rip.style.left = (e.clientX - r.left) + "px";
      rip.style.top  = (e.clientY - r.top)  + "px";
      item.appendChild(rip);
      rip.addEventListener("animationend", () => rip.remove());
    });

    const _origAppend = content.appendChild.bind(content);
    content.appendChild = (el) => {
      if (el?.classList?.contains("flcu-item")) {
        el.style.setProperty("--flcu-i", `${60 + _ripIdx * 48}ms`);
        _ripIdx++;
      }
      return _origAppend(el);
    };

    const origBtn = document.createElement("button");
    origBtn.className = "flcu-item";
    origBtn.style.backgroundColor = "rgba(88, 101, 242, 0.1)";
    origBtn.style.borderColor = "rgba(88, 101, 242, 0.3)";

    const origLabel = isCleaned ? `✨ ${t("orig_clean")}` : t("orig");

    origBtn.innerHTML = `
    <span class="flcu-prefix" style="color: #5865F2; min-width: 28px;">🔗</span>
    <div class="flcu-item-content">
        <div class="flcu-item-title" style="${isCleaned ? "color:#43b581" : ""}">${origLabel}</div>
        <div class="flcu-item-desc">${escHtml(cleanedUrl)}</div>
    </div>
    <span class="flcu-copy-hint" style="background: rgba(88,101,242,0.8);">📋</span>
`;
    origBtn.onclick = () => copy(cleanedUrl);
    content.appendChild(origBtn);

    const shortsMatch = rawUrl.match(
      /^https?:\/\/(?:www\.)?youtube\.com\/shorts\/([a-zA-Z0-9_-]{11})([?&].*)?$/,
    );
    if (shortsMatch) {
      content.appendChild(
        Object.assign(document.createElement("div"), {
          style: "height:1px;background:#3f4147;margin:0",
        }),
      );
      const videoId = shortsMatch[1];
      const extraParams = shortsMatch[2]
        ? shortsMatch[2].replace(/^[?&]/, "&")
        : "";
      const watchUrl = `https://www.youtube.com/watch?v=${videoId}${extraParams}`;
      const shortsBtn = document.createElement("button");
      shortsBtn.className = "flcu-item";
      shortsBtn.innerHTML = `
        <span class="flcu-prefix">▶️ WATCH</span>
        <span style="flex: 1; text-align: left;">${t("to")} youtube.com/watch</span>
        <span class="flcu-copy-hint">📋</span>
    `;
      shortsBtn.onclick = () => copy(watchUrl);
      content.appendChild(shortsBtn);
    }

    if (rules.length > 0) {
      content.appendChild(
        Object.assign(document.createElement("div"), {
          style: "height:1px;background:#3f4147;margin:0",
        }),
      );

      const lastUsedMap = getLastUsed();
      const lastUsedHostname = lastUsedMap[host] || null;
      let preCopied = false;

      if (lastUsedHostname) {
        const lastItem = rules.find((r) => r.target === lastUsedHostname);
        if (lastItem) {
          try {
            const u = new URL(cleanedUrl);
            u.hostname = lastItem.target;
            GM_setClipboard(u.toString(), "text");
            preCopied = true;
          } catch (_) {}
        }
      }

      if (preCopied) {
        const hint = document.createElement("div");
        hint.className = "flcu-precopy-hint";
        hint.textContent = `${t("pre_copied_hint")} ${lastUsedHostname}`;
        content.appendChild(hint);
      }

      rules.forEach((r) => {
        const isLast = r.target === lastUsedHostname;
        const btn = document.createElement("button");
        btn.className = "flcu-item" + (isLast ? " flcu-item-last" : "");
        btn.innerHTML = `
            <span class="prefix">${escHtml(r.label.toUpperCase())}</span>
            <div style="flex:1;text-align:left;min-width:0">
              <span>${t("to")} ${escHtml(r.label)}</span>
              ${isLast ? `<span class="flcu-badge-last">${escHtml(t("badge_last"))}</span>` : ""}
            </div>
            <span class="copy-hint">📋</span>
        `;

        let targetUrl = cleanedUrl;
        try {
          const u = new URL(cleanedUrl);
          u.hostname = r.target;
          targetUrl = u.toString();
        } catch (_) {}

        btn.onclick = () => {
          const prefCheckbox = content.querySelector("#flcu-pref-check");
          if (prefCheckbox?.checked) {
            setSitePref(host, r.target);
            toast(`${t("toast_pref_saved")}: ${r.target}`);
            const ov = document.getElementById("flcu-overlay");
            ov?._cleanupFI?.();
            if (ov) {
              ov.classList.add("flcu-closing");
              ov.querySelector("#flcu-menu")?.classList.add("flcu-closing");
              setTimeout(() => ov.remove(), 190);
            }
            GM_setClipboard(targetUrl, "text");
          } else {
            copy(targetUrl, r.target);
          }
        };
        content.appendChild(btn);
      });

      const prefBar = document.createElement("div");
      prefBar.className = "flcu-pref-bar";
      const prefLabel = document.createElement("label");
      prefLabel.className = "flcu-pref-label";
      const prefCheckbox = document.createElement("input");
      prefCheckbox.type = "checkbox";
      prefCheckbox.id = "flcu-pref-check";
      prefCheckbox.className = "flcu-pref-check";
      const prefSpan = document.createElement("span");
      prefSpan.textContent = t("lbl_always_direct");
      prefLabel.appendChild(prefCheckbox);
      prefLabel.appendChild(prefSpan);
      prefBar.appendChild(prefLabel);

      prefBar.addEventListener("mousedown", (e) => e.stopPropagation());
      prefLabel.addEventListener("click", (e) => {
        e.preventDefault();
        prefCheckbox.checked = !prefCheckbox.checked;
      });

      content.appendChild(prefBar);
    }

    overlay.onclick = (e) => e.target === overlay && closeOverlay();
    overlay.querySelector("#flcu-close").onclick = () => closeOverlay();
    overlay.querySelector("#flcu-settings").onclick = () =>
      switchToManager(menu, false);
  }

  function openTjSidePanel(menu, autoFill) {
    const manager = menu.querySelector("#flcu-manager");
    const headerTitle = menu.querySelector("#flcu-header span");
    if (!manager) return;
    manager.style.display = "none";
    headerTitle.textContent = t("lbl_toast_jump");

    const panel = document.createElement("div");
    panel.id = "flcu-tj-panel";
    panel.style.cssText = "padding:20px;background:#36393f;display:flex;flex-direction:column;gap:14px;max-height:82vh;overflow-y:auto;overscroll-behavior:contain;";

    const buildJumpLinkRow = (link, container, rerender) => {
      const domain = (() => { try { return new URL(link.url).hostname; } catch (_) { return ""; } })();
      const row = document.createElement("div");
      row.className = "flcu-rule-item flcu-jl-row";
      row.innerHTML = `
        <img class="flcu-jl-icon" src="https://www.google.com/s2/favicons?sz=32&domain=${encodeURIComponent(domain)}" alt="">
        <div style="flex:1;min-width:0;overflow:hidden">
          <div style="font-size:13px;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis">${escHtml(link.name)}</div>
          <div style="font-size:11px;color:#72767d;white-space:nowrap;overflow:hidden;text-overflow:ellipsis">${escHtml(link.url)}</div>
        </div>
        <div class="flcu-toggle-wrap${link.enabled ? " flcu-on" : ""}" data-jl-toggle style="margin-left:6px">
          <span class="flcu-toggle-slider"></span>
        </div>
        <span class="flcu-icon-btn" data-jl-edit style="color:#b9bbbe;font-size:13px;margin-left:6px" title="${escHtml(t("lbl_edit"))}">✏️</span>
        <span class="flcu-icon-btn" data-jl-del style="color:#ed4245;font-weight:bold;margin-left:4px" title="${escHtml(t("toast_link_deleted"))}">×</span>
      `;
      row.querySelector("[data-jl-toggle]").onclick = () => {
        const ls = getJumpLinks(); const idx = ls.findIndex((l) => l.id === link.id);
        if (idx !== -1) { ls[idx].enabled = !ls[idx].enabled; saveJumpLinks(ls); rerender(); }
      };
      row.querySelector("[data-jl-del]").onclick = () => {
        saveJumpLinks(getJumpLinks().filter((l) => l.id !== link.id));
        toast(t("toast_link_deleted")); rerender();
      };
      row.querySelector("[data-jl-edit]").onclick = () => {
        const ls = getJumpLinks(); const target = ls.find((l) => l.id === link.id);
        if (!target) return;
        row.innerHTML = `
          <div style="display:flex;gap:6px;flex:1;flex-wrap:wrap;align-items:center">
            <input class="flcu-input" id="flcu-jl-en" value="${escHtml(target.name)}" placeholder="${escHtml(t("ph_link_name"))}" style="flex:1;min-width:0">
            <input class="flcu-input" id="flcu-jl-eu" value="${escHtml(target.url)}" placeholder="${escHtml(t("ph_link_url"))}" style="flex:2;min-width:0">
            <button class="flcu-btn flcu-btn-primary" id="flcu-jl-eok">${t("lbl_done")}</button>
            <button class="flcu-btn flcu-btn-ghost" id="flcu-jl-ecancel">${t("lbl_cancel")}</button>
          </div>`;
        row.querySelector("#flcu-jl-eok").onclick = () => {
          const n = row.querySelector("#flcu-jl-en").value.trim();
          const u = row.querySelector("#flcu-jl-eu").value.trim();
          if (!n || !u) return;
          const ls2 = getJumpLinks(); const idx = ls2.findIndex((l) => l.id === link.id);
          if (idx !== -1) { ls2[idx].name = n; ls2[idx].url = u; saveJumpLinks(ls2); }
          rerender();
        };
        row.querySelector("#flcu-jl-ecancel").onclick = rerender;
      };
      container.appendChild(row);
    };

    const renderPanel = () => {
      panel.innerHTML = "";
      const cfg = getToastJumpCfg();

      const toggleRow = document.createElement("div");
      toggleRow.className = "flcu-key-row";
      toggleRow.innerHTML = `
        <span class="flcu-key-label" style="font-size:13px">${t("lbl_toast_jump")}</span>
        <div class="flcu-toggle-wrap${cfg.enabled ? " flcu-on" : ""}" id="flcu-tj-toggle" role="switch" tabindex="0">
          <span class="flcu-toggle-slider"></span>
        </div>`;
      const tog = toggleRow.querySelector("#flcu-tj-toggle");
      tog.onclick = () => {
        const c = getToastJumpCfg(); c.enabled = !tog.classList.contains("flcu-on");
        saveToastJumpCfg(c); renderPanel();
      };
      panel.appendChild(toggleRow);

      const desc = document.createElement("div");
      desc.className = "flcu-desc-text";
      desc.textContent = t("desc_toast_jump");
      panel.appendChild(desc);

      if (cfg.enabled) {
        const actRow = document.createElement("div");
        actRow.className = "flcu-key-row";
        actRow.innerHTML = `
          <span class="flcu-key-label">${t("lbl_toast_action")}</span>
          <div class="flcu-action-group">
            <button class="flcu-action-btn${cfg.action === "click" ? " active" : ""}" data-act="click">${t("opt_click")}</button>
            <button class="flcu-action-btn${cfg.action === "hover" ? " active" : ""}" data-act="hover">${t("opt_hover")}</button>
          </div>`;
        actRow.querySelectorAll(".flcu-action-btn").forEach((btn) => {
          btn.onclick = () => {
            const c = getToastJumpCfg(); c.action = btn.dataset.act; saveToastJumpCfg(c);
            actRow.querySelectorAll(".flcu-action-btn").forEach((b) => b.classList.toggle("active", b === btn));
          };
        });
        panel.appendChild(actRow);

        const jlTitle = document.createElement("div");
        jlTitle.className = "flcu-sec-title";
        jlTitle.textContent = t("sec_jump_links");
        panel.appendChild(jlTitle);

        const nameInput = document.createElement("input");
        nameInput.type = "text"; nameInput.id = "flcu-jl-name";
        nameInput.className = "flcu-input"; nameInput.placeholder = t("ph_link_name");
        nameInput.style.marginBottom = "6px";

        const urlRow = document.createElement("div");
        urlRow.className = "flcu-input-group";
        urlRow.style.marginBottom = "0";
        const urlInput = document.createElement("input");
        urlInput.type = "text"; urlInput.id = "flcu-jl-url";
        urlInput.className = "flcu-input"; urlInput.placeholder = t("ph_link_url");
        const addBtn = document.createElement("button");
        addBtn.id = "flcu-jl-add"; addBtn.className = "flcu-btn flcu-btn-primary";
        addBtn.style.whiteSpace = "nowrap"; addBtn.textContent = t("btn_add_link");
        urlRow.appendChild(urlInput); urlRow.appendChild(addBtn);
        panel.appendChild(nameInput); panel.appendChild(urlRow);

        const jlContainer = document.createElement("div");
        jlContainer.className = "flcu-rule-list";
        jlContainer.style.maxHeight = "200px";
        panel.appendChild(jlContainer);

        const rerender = () => renderPanel();
        const renderLinks = () => {
          jlContainer.innerHTML = "";
          const links = getJumpLinks();
          if (links.length === 0) {
            jlContainer.innerHTML = `<div class="flcu-empty-msg">${t("empty_links")}</div>`;
            return;
          }
          links.forEach((link) => buildJumpLinkRow(link, jlContainer, rerender));
        };
        renderLinks();

        const doAdd = () => {
          const n = nameInput.value.trim(); const u = urlInput.value.trim();
          if (!n || !u) return;
          const ls = getJumpLinks(); ls.push({ id: genId(), name: n, url: u, enabled: true });
          saveJumpLinks(ls); nameInput.value = ""; urlInput.value = "";
          toast(t("toast_link_added")); renderLinks();
        };
        addBtn.onclick = doAdd;
        urlInput.addEventListener("keydown", (e) => { if (e.key === "Enter") { e.preventDefault(); doAdd(); } });
        nameInput.addEventListener("keydown", (e) => { if (e.key === "Enter") { e.preventDefault(); urlInput.focus(); } });
      }

      const backBtn = document.createElement("button");
      backBtn.className = "flcu-btn flcu-btn-ghost"; backBtn.textContent = t("btn_back");
      backBtn.style.alignSelf = "flex-start";
      backBtn.onclick = () => {
        panel.remove();
        manager.style.display = "";
        headerTitle.textContent = t("settings_title");
      };
      panel.appendChild(backBtn);
    };

    renderPanel();
    menu.appendChild(panel);
  }

  function switchToManager(menu, autoFill = false) {
    const { host } = getUrlInfo();
    const config = getConfig();
    const content = menu.querySelector(".flcu-content");
    const footer = menu.querySelector(".flcu-footer");
    const headerTitle = menu.querySelector("#flcu-header span");

    content.style.display = "none";
    footer.style.display = "none";
    headerTitle.textContent = t("settings_title");

    const manager = document.createElement("div");
    manager.id = "flcu-manager";

    const langSwitcherHtml = Object.entries(LANG_LABELS)
      .map(
        ([code, label]) =>
          `<span class="flcu-lang-item" data-l="${code}">${label}</span>`,
      )
      .join("");

    const secStates = getSectionStates();
    const isOpen = (id, def) => (id in secStates ? secStates[id] : def);

    manager.innerHTML = `
            <!-- ① 按鍵偏好設定 -->
            <div class="flcu-section${isOpen("keys", true) ? " open" : ""}" data-sec="keys">
                <div class="flcu-section-hdr">
                    <span class="flcu-section-hdr-title">${t("sec_keys")}</span>
                    <span class="flcu-section-chevron">›</span>
                </div>
                <div class="flcu-section-body">
                    <div class="flcu-key-row" style="margin:0">
                        <span class="flcu-key-label">${t("lbl_trigger")}</span>
                        <div id="rec-trigger" class="flcu-key-recorder">${escHtml(config.triggerKey)}</div>
                    </div>
                    <div class="flcu-desc-text" style="margin:0">${escHtml(t("desc_trigger"))}</div>
                    <div class="flcu-key-row" style="margin:0">
                        <span class="flcu-key-label">${t("lbl_shortcut")}</span>
                        <div id="rec-shortcut" class="flcu-key-recorder">${escHtml(shortcutToString(config.shortcut))}</div>
                    </div>
                    <div class="flcu-desc-text" style="margin:0">${escHtml(t("desc_shortcut"))}</div>
                </div>
            </div>

            <!-- ② 複製提示跳轉(toggle + config in one section) -->
            <div class="flcu-section${isOpen("tj", false) ? " open" : ""}" data-sec="tj">
                <div class="flcu-section-hdr" id="flcu-tj-section-hdr">
                    <span class="flcu-section-hdr-title">
                        ${t("lbl_toast_jump")}
                    </span>
                    <div style="display:flex;align-items:center;gap:8px">
                        <div class="flcu-toggle-wrap${getToastJumpCfg().enabled ? " flcu-on" : ""}" id="flcu-tj-hdr-toggle" role="switch" tabindex="0">
                            <span class="flcu-toggle-slider"></span>
                        </div>
                        <span class="flcu-section-chevron">›</span>
                    </div>
                </div>
                <div class="flcu-section-body">
                    <div class="flcu-desc-text" style="margin:0">${escHtml(t("desc_toast_jump"))}</div>
                    <div class="flcu-key-row" style="margin:0;display:${getToastJumpCfg().enabled ? "flex" : "none"}" id="flcu-tj-action-row">
                        <span class="flcu-key-label">${t("lbl_toast_action")}</span>
                        <div class="flcu-action-group">
                            <button class="flcu-action-btn${getToastJumpCfg().action === "click" ? " active" : ""}" data-act="click">${t("opt_click")}</button>
                            <button class="flcu-action-btn${getToastJumpCfg().action === "hover" ? " active" : ""}" data-act="hover">${t("opt_hover")}</button>
                        </div>
                    </div>
                    <div id="flcu-tj-entry" class="flcu-nav-btn" style="display:${getToastJumpCfg().enabled ? "flex" : "none"}">
                        <span>${t("sec_jump_links")}</span>
                        <span style="color:#72767d">›</span>
                    </div>
                </div>
            </div>

            <!-- ③ 進階功能(自定義規則 + 網站偏好)-->
            <div class="flcu-section flcu-section-advanced${isOpen("advanced", false) ? " open" : ""}" data-sec="advanced">
                <div class="flcu-section-hdr">
                    <span class="flcu-section-hdr-title" style="color:#8e9297">
                        ${t("sec_rules")} / ${t("sec_prefs")}
                        <span class="flcu-adv-badge">⚙ Advanced</span>
                    </span>
                    <span class="flcu-section-chevron">›</span>
                </div>
                <div class="flcu-section-body">
                    <div class="flcu-desc-text" style="margin:0">${escHtml(t("desc_rules"))}</div>
                    <div class="flcu-input-group" style="margin:0">
                        <input type="text" id="flcu-src" class="flcu-input" placeholder="${escHtml(t("ph_src"))}" value="${autoFill ? escHtml(host) : ""}">
                    </div>
                    <div class="flcu-input-group" style="margin:0">
                        <input type="text" id="flcu-tgt" class="flcu-input" placeholder="${escHtml(t("ph_tgt"))}">
                        <button id="flcu-add" class="flcu-btn flcu-btn-primary" style="white-space:nowrap">${t("btn_add")}</button>
                    </div>
                    <div class="flcu-rule-list" id="flcu-list-container"></div>
                    <div class="flcu-desc-text" style="margin:4px 0 0 0;color:#4f545c">${t("sec_prefs")}</div>
                    <div class="flcu-rule-list" id="flcu-prefs-container"></div>
                </div>
            </div>

            <div style="display:flex; justify-content:space-between; align-items:flex-end; margin-top:4px;">
                <button id="flcu-back" class="flcu-btn flcu-btn-ghost">${t("btn_back")}</button>
                <div class="flcu-lang-switch">${langSwitcherHtml}</div>
            </div>
        `;

    menu.appendChild(manager);

    manager.querySelectorAll(".flcu-section").forEach((sec) => {
      const secId = sec.dataset.sec;
      sec.querySelector(".flcu-section-hdr").addEventListener("click", (e) => {
        if (e.target.closest("#flcu-tj-hdr-toggle")) return;
        const nowOpen = sec.classList.toggle("open");
        setSectionState(secId, nowOpen);
      });
    });

    const tjHdrToggle = manager.querySelector("#flcu-tj-hdr-toggle");
    if (tjHdrToggle) {
      const tjActionRow = manager.querySelector("#flcu-tj-action-row");
      const tjEntryBtn  = manager.querySelector("#flcu-tj-entry");
      tjHdrToggle.onclick = (e) => {
        e.stopPropagation();
        const c = getToastJumpCfg(); c.enabled = !tjHdrToggle.classList.contains("flcu-on");
        saveToastJumpCfg(c);
        tjHdrToggle.classList.toggle("flcu-on", c.enabled);
        if (tjActionRow) tjActionRow.style.display = c.enabled ? "flex" : "none";
        if (tjEntryBtn)  tjEntryBtn.style.display  = c.enabled ? "flex" : "none";
        const tjSec = manager.querySelector('[data-sec="tj"]');
        if (c.enabled && tjSec && !tjSec.classList.contains("open")) {
          tjSec.classList.add("open"); setSectionState("tj", true);
        }
      };
      tjHdrToggle.onkeydown = (e) => {
        if (e.key === " " || e.key === "Enter") { e.preventDefault(); tjHdrToggle.click(); }
      };
    }

    manager.querySelectorAll(".flcu-action-btn").forEach((btn) => {
      btn.onclick = () => {
        manager.querySelectorAll(".flcu-action-btn").forEach((b) => b.classList.remove("active"));
        btn.classList.add("active");
        const cfg = getToastJumpCfg(); cfg.action = btn.dataset.act; saveToastJumpCfg(cfg);
      };
    });

    if (autoFill) {
      const advSec = manager.querySelector('[data-sec="advanced"]');
      if (advSec && !advSec.classList.contains("open")) {
        advSec.classList.add("open"); setSectionState("advanced", true);
      }
      setTimeout(() => manager.querySelector("#flcu-tgt")?.focus(), 50);
    }

    const renderRules = () => {
      const container = manager.querySelector("#flcu-list-container");
      container.innerHTML = "";
      const rules = getUserRules();
      if (rules.length === 0) {
        container.innerHTML = `<div class="flcu-empty-msg">${t("empty_rules")}</div>`;
        return;
      }
      rules.forEach((r, i) => {
        const row = document.createElement("div");
        row.className = "flcu-rule-item";
        row.innerHTML = `
                    <div style="overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:240px;">
                        <span style="color:#fff">${escHtml(r.source)}</span> → <span style="color:#5865F2">${escHtml(r.target)}</span>
                    </div>
                    <span class="flcu-icon-btn del-btn" style="color:#ed4245;font-weight:bold">×</span>
                `;
        row.querySelector(".del-btn").onclick = () => {
          removeUserRule(i);
          renderRules();
        };
        container.appendChild(row);
      });
    };
    renderRules();

    const doAddRule = () => {
      const src = manager.querySelector("#flcu-src").value.trim();
      const tgt = manager.querySelector("#flcu-tgt").value.trim();
      if (src && tgt) {
        const added = addUserRule(src, tgt);
        if (added === false) {
          toast("⚠️ " + src + " → " + tgt);
          return;
        }
        renderRules();
        manager.querySelector("#flcu-src").value = "";
        manager.querySelector("#flcu-tgt").value = "";
        toast(t("toast_added"));
      }
    };
    manager.querySelector("#flcu-add").onclick = doAddRule;
    manager.querySelector("#flcu-tgt").addEventListener("keydown", (e) => {
      if (e.key === "Enter") {
        e.preventDefault();
        doAddRule();
      }
    });
    manager.querySelector("#flcu-src").addEventListener("keydown", (e) => {
      if (e.key === "Enter") {
        e.preventDefault();
        manager.querySelector("#flcu-tgt").focus();
      }
    });

    const bindRecorder = (el, type) => {
      el.onclick = () => {
        if (el.classList.contains("recording")) return;
        el.classList.add("recording");
        el.innerText = t("rec_press");

        const handler = (e) => {
          e.preventDefault();
          e.stopPropagation();
          if (e.key === "Escape") {
            el.classList.remove("recording");
            el.innerText =
              type === "trigger"
                ? config.triggerKey
                : shortcutToString(config.shortcut);
          } else if (type === "trigger") {
            config.triggerKey = e.key;
            saveConfig(config);
            el.innerText = e.key;
            el.classList.remove("recording");
            toast(t("toast_key_updated"));
          } else if (type === "shortcut") {
            if (["Control", "Alt", "Shift", "Meta"].includes(e.key)) return;
            if (e.key === "Backspace" || e.key === "Delete") {
              config.shortcut = null;
              toast(t("toast_key_cleared"));
            } else {
              config.shortcut = {
                ctrl: e.ctrlKey,
                alt: e.altKey,
                shift: e.shiftKey,
                meta: e.metaKey,
                key: e.key.length === 1 ? e.key.toUpperCase() : e.key,
              };
              toast(t("toast_key_updated"));
            }
            el.innerText = shortcutToString(config.shortcut);
            saveConfig(config);
            el.classList.remove("recording");
          }
          document.removeEventListener("keydown", handler, true);
        };
        document.addEventListener("keydown", handler, true);
      };
    };
    bindRecorder(manager.querySelector("#rec-trigger"), "trigger");
    bindRecorder(manager.querySelector("#rec-shortcut"), "shortcut");

    const renderPrefs = () => {
      const container = manager.querySelector("#flcu-prefs-container");
      container.innerHTML = "";
      const prefs = getSitePrefs();
      const entries = Object.entries(prefs);
      if (entries.length === 0) {
        container.innerHTML = `<div class="flcu-empty-msg">${t("pref_empty")}</div>`;
        return;
      }
      entries.forEach(([h, tgt]) => {
        const row = document.createElement("div");
        row.className = "flcu-rule-item";
        row.innerHTML = `
          <div style="overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:220px;flex:1">
            <span style="color:#b9bbbe">${escHtml(h)}</span>
            <span style="color:#4f545c"> → </span>
            <span style="color:#5865F2">${escHtml(tgt)}</span>
          </div>
          <span class="flcu-icon-btn del-btn" style="color:#ed4245;font-weight:bold" title="${escHtml(t("toast_pref_cleared"))}">×</span>
        `;
        row.querySelector(".del-btn").onclick = () => {
          removeSitePref(h);
          toast(t("toast_pref_cleared"));
          renderPrefs();
        };
        container.appendChild(row);
      });
    };
    renderPrefs();

    manager.querySelector("#flcu-tj-entry").onclick = () => {
      openTjSidePanel(menu, autoFill);
    };

    manager.querySelector("#flcu-back").onclick = () => {
      manager.remove();
      content.style.display = "block";
      footer.style.display = "flex";
      headerTitle.textContent = t("title");
    };

    manager.querySelectorAll(".flcu-lang-item").forEach((btn) => {
      if (btn.dataset.l === getLang()) btn.classList.add("active");
      btn.onclick = () => {
        if (btn.dataset.l === "__custom") {
          manager.remove();
          switchToCustomLang(menu, autoFill);
        } else {
          setLang(btn.dataset.l);
          manager.remove();
          menu.querySelector("#flcu-header span").textContent = t("title");
          switchToManager(menu, autoFill);
        }
      };
    });
  }

  function getCustomLang() {
    return GM_getValue("custom_lang", null);
  }
  function setCustomLang(obj) {
    GM_setValue("custom_lang", obj);
  }

  function buildExportJson() {
    const template = {
      _instructions: CUSTOM_LANG_INSTRUCTIONS,
      _note:
        "Translate the VALUES only. Do NOT change the KEYS. " +
        "Keep {placeholders} like {n} {s} {t} untouched. " +
        "Preserve HTML tags and class='...' attributes as-is. " +
        "The 'name' field will be shown in the language selector.",
      name: "My Custom Language",
      ...TRANSLATIONS["en"],
    };
    return JSON.stringify(template, null, 2);
  }

  function switchToCustomLang(menu, autoFill = false) {
    const content = menu.querySelector(".flcu-content");
    const footer = menu.querySelector(".flcu-footer");
    const headerTitle = menu.querySelector("#flcu-header span");

    content.style.display = "none";
    footer.style.display = "none";
    headerTitle.textContent =
      "🌐 " +
      (getLang() === "__custom"
        ? getCustomLang()?._name || "Custom Language"
        : "Custom Language");

    const panel = document.createElement("div");
    panel.id = "flcu-custom-panel";
    const existingCustom = getCustomLang();
    panel.innerHTML = `
            <div class="flcu-custom-instructions">${escHtml(CUSTOM_LANG_INSTRUCTIONS)}</div>
            ${
              existingCustom
                ? `
            <div class="flcu-custom-active">
                <span class="flcu-custom-active-name">✅ ${escHtml(existingCustom._name || "Custom Language")} active</span>
                <button id="flcu-revoke-lang" class="flcu-btn-revoke">🗑 Remove</button>
            </div>`
                : ""
            }
            <div class="flcu-custom-btns">
                <button id="flcu-export-lang" class="flcu-btn flcu-btn-primary">📤 Export</button>
                <button id="flcu-import-btn" class="flcu-btn-import">📥 Import</button>
            </div>
            <div id="flcu-import-status" class="flcu-import-status"></div>
            <div style="margin-top:4px">
                <button id="flcu-back-custom" class="flcu-btn flcu-btn-ghost">${t("btn_back")}</button>
            </div>
        `;
    menu.appendChild(panel);

    const revokeBtn = panel.querySelector("#flcu-revoke-lang");
    if (revokeBtn) {
      revokeBtn.onclick = () => {
        GM_setValue("custom_lang", null);
        setLang(null);
        toast("🗑 Custom language removed");
        cleanupInput();
        panel.remove();
        content.style.display = "block";
        footer.style.display = "flex";
        headerTitle.textContent = t("title");
      };
    }

    panel.querySelector("#flcu-export-lang").onclick = () => {
      const json = buildExportJson();
      const dataUrl =
        "data:application/json;charset=utf-8," + encodeURIComponent(json);
      const a = document.createElement("a");
      a.href = dataUrl;
      a.download = "flcu_custom_lang.json";
      document.body.appendChild(a);
      a.click();
      document.body.removeChild(a);
    };

    const fileInput = document.createElement("input");
    fileInput.type = "file";
    fileInput.accept = ".json";
    fileInput.style.cssText =
      "position:fixed;opacity:0;pointer-events:none;width:0;height:0;top:0;left:0;z-index:-1";
    document.body.appendChild(fileInput);

    panel.querySelector("#flcu-import-btn").onclick = (e) => {
      e.stopPropagation();
      fileInput.click();
    };

    const cleanupInput = () => {
      fileInput.remove();
      const ov = document.getElementById("flcu-overlay");
      if (ov) ov._cleanupFI = null;
    };
    const ov = document.getElementById("flcu-overlay");
    if (ov) ov._cleanupFI = cleanupInput;

    fileInput.onchange = (e) => {
      const file = e.target.files[0];
      if (!file) return;
      const statusEl = panel.querySelector("#flcu-import-status");
      const reader = new FileReader();
      reader.onload = (ev) => {
        try {
          const raw = JSON.parse(ev.target.result);
          const validKeys = Object.keys(TRANSLATIONS["en"]);
          const filtered = {};
          for (const k of validKeys) {
            if (raw[k] !== undefined) filtered[k] = String(raw[k]);
          }
          if (raw.name) filtered._name = String(raw.name);
          setCustomLang(filtered);
          setLang("__custom");
          toast("✅ " + (filtered._name || "Custom language") + " loaded!");
          cleanupInput();
          panel.remove();
          content.style.display = "block";
          footer.style.display = "flex";
          headerTitle.textContent = t("title");
        } catch (err) {
          statusEl.textContent = "❌ Invalid JSON: " + err.message;
        }
      };
      reader.readAsText(file);
    };

    panel.querySelector("#flcu-back-custom").onclick = () => {
      cleanupInput();
      panel.remove();
      switchToManager(menu, autoFill);
    };
  }

  function resolveLinks() {
    const rawUrl = location.href;
    const cleanedUrl = cleanUrl(rawUrl);
    const { host } = getUrlInfo();
    const rules = getMatchedRules(host);
    const targets = [];

    const shortsMatch = rawUrl.match(
      /^https?:\/\/(?:www\.)?youtube\.com\/shorts\/([a-zA-Z0-9_-]{11})([?&].*)?$/,
    );
    if (shortsMatch) {
      const videoId = shortsMatch[1];
      const extraParams = shortsMatch[2]
        ? shortsMatch[2].replace(/^[?&]/, "&")
        : "";
      targets.push({
        label: "YouTube Watch",
        url: `https://www.youtube.com/watch?v=${videoId}${extraParams}`,
      });
    }

    rules.forEach((r) => {
      try {
        const u = new URL(cleanedUrl);
        u.hostname = r.target;
        targets.push({ label: r.label, url: u.toString() });
      } catch (_) {}
    });

    return { cleanedUrl, targets };
  }

  function triggerSmartAction() {
    const { cleanedUrl, targets } = resolveLinks();
    const { host } = getUrlInfo();

    if (targets.length === 0) {
      GM_setClipboard(cleanedUrl, "text");
      const disp = cleanedUrl.length > 60 ? cleanedUrl.slice(0, 57) + "..." : cleanedUrl;
      toast(`${t("toast_copied")}: ${disp}`);
    } else if (targets.length === 1) {
      const url = targets[0].url;
      try { setLastUsedForHost(host, new URL(url).hostname); } catch (_) {}
      GM_setClipboard(url, "text");
      const disp = url.length > 60 ? url.slice(0, 57) + "..." : url;
      toast(`${t("toast_copied")}: ${disp}`);
    } else {
      const prefs = getSitePrefs();
      if (prefs[host]) {
        const prefItem = targets.find((item) => {
          try { return new URL(item.url).hostname === prefs[host]; } catch (_) { return false; }
        });
        if (prefItem) {
          try { setLastUsedForHost(host, new URL(prefItem.url).hostname); } catch (_) {}
          GM_setClipboard(prefItem.url, "text");
          const disp = prefItem.url.length > 60 ? prefItem.url.slice(0, 57) + "..." : prefItem.url;
          toast(`${t("toast_copied")}: ${disp}`);
          return;
        }
        removeSitePref(host);
      }
      createMenu();
    }
  }

  function copy(text, targetHostname) {
    GM_setClipboard(text, "text");
    if (targetHostname) {
      const { host } = getUrlInfo();
      setLastUsedForHost(host, targetHostname);
    }
    const displayText = text.length > 60 ? text.slice(0, 57) + "..." : text;
    toast(`${t("toast_copied")}: ${displayText}`);
    const ov = document.getElementById("flcu-overlay");
    if (ov) {
      ov._cleanupFI?.();
      ov.classList.add("flcu-closing");
      ov.querySelector("#flcu-menu")?.classList.add("flcu-closing");
      setTimeout(() => ov.remove(), 190);
    }
  }

  let _toastHideTimer = null;

  function toast(msg) {
    clearTimeout(_toastHideTimer);
    let toastEl = document.querySelector(".flcu-toast");
    if (!toastEl) {
      toastEl = document.createElement("div");
      toastEl.className = "flcu-toast";
      document.body.appendChild(toastEl);
    }

    const cfg = getToastJumpCfg();
    const links = cfg.enabled ? getJumpLinks().filter((l) => l.enabled) : [];

    const oldPopup = document.getElementById("flcu-jump-popup");
    if (oldPopup) oldPopup.remove();
    toastEl._cleanJump?.();

    toastEl.innerHTML = "";
    const msgSpan = document.createElement("span");
    msgSpan.className = "flcu-toast-msg";
    msgSpan.textContent = msg;
    toastEl.appendChild(msgSpan);

    const bar = document.createElement("div");
    bar.className = "flcu-toast-bar";
    toastEl.appendChild(bar);

    if (links.length > 0) {
      const hint = document.createElement("span");
      hint.className = "flcu-toast-jump-hint";
      hint.textContent = " ↗";
      toastEl.insertBefore(hint, bar);
      toastEl.classList.add("flcu-toast-jumpable");
    } else {
      toastEl.classList.remove("flcu-toast-jumpable");
    }

    toastEl.classList.remove("show", "hiding");
    void toastEl.offsetWidth;
    toastEl.classList.add("show");

    const hideToast = () => {
      toastEl.classList.add("hiding");
      setTimeout(() => toastEl.classList.remove("show", "hiding"), 230);
    };
    _toastHideTimer = setTimeout(hideToast, 2000);

    const resetTimer = () => {
      clearTimeout(_toastHideTimer);
      _toastHideTimer = setTimeout(hideToast, 2000);
    };

    if (links.length > 0) {
      let popup = null;

      const buildPopup = () => {
        if (popup) return;
        popup = document.createElement("div");
        popup.id = "flcu-jump-popup";
        links.forEach((link) => {
          const item = document.createElement("div");
          item.className = "flcu-jump-item";
          const domain = (() => { try { return new URL(link.url).hostname; } catch (_) { return ""; } })();
          item.innerHTML = `
            <img class="flcu-jump-icon" src="https://www.google.com/s2/favicons?sz=32&domain=${encodeURIComponent(domain)}" alt="">
            <span class="flcu-jump-name">${escHtml(link.name)}</span>
            <button class="flcu-jump-btn" data-action="newtab" title="另開新分頁">
              <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round">
                <path d="M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6"/>
                <polyline points="15 3 21 3 21 9"/>
                <line x1="10" y1="14" x2="21" y2="3"/>
              </svg>
            </button>
            <button class="flcu-jump-btn flcu-jump-btn-spa" data-action="spa" title="嘗試強制SPA跳轉進入連結">
              <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round">
                <circle cx="12" cy="12" r="10"/>
                <polyline points="12 8 16 12 12 16"/>
                <line x1="8" y1="12" x2="16" y2="12"/>
              </svg>
            </button>
          `;
          item.querySelector("[data-action='newtab']").onclick = (e) => {
            e.stopPropagation();
            window.open(link.url, "_blank", "noopener");
          };
          item.querySelector("[data-action='spa']").onclick = (e) => {
            e.stopPropagation();
            try {
              history.pushState(null, "", link.url);
              window.dispatchEvent(new PopStateEvent("popstate", { state: null }));
            } catch (_) {}
            location.href = link.url;
          };
          popup.appendChild(item);
        });
        document.body.appendChild(popup);
      };

      const destroyPopup = () => {
        popup?.remove();
        popup = null;
      };

      if (cfg.action === "hover") {
        let leaveTimer = null;
        const clearLeave = () => clearTimeout(leaveTimer);

        const onToastEnter = () => {
          clearLeave();
          clearTimeout(_toastHideTimer);
          buildPopup();
          const p = document.getElementById("flcu-jump-popup");
          if (p && !p._hovered) {
            p._hovered = true;
            p.addEventListener("mouseenter", clearLeave);
            p.addEventListener("mouseleave", () => {
              leaveTimer = setTimeout(() => { destroyPopup(); resetTimer(); }, 300);
            });
          }
        };
        const onToastLeave = () => {
          leaveTimer = setTimeout(() => { destroyPopup(); resetTimer(); }, 300);
        };

        toastEl.addEventListener("mouseenter", onToastEnter);
        toastEl.addEventListener("mouseleave", onToastLeave);

        toastEl._cleanJump = () => {
          destroyPopup();
          clearLeave();
          toastEl.removeEventListener("mouseenter", onToastEnter);
          toastEl.removeEventListener("mouseleave", onToastLeave);
        };
      } else {
        const onClick = (e) => {
          e.stopPropagation();
          if (popup) { destroyPopup(); return; }
          clearTimeout(_toastHideTimer);
          buildPopup();
          const onOutside = (ev) => {
            if (!popup?.contains(ev.target) && ev.target !== toastEl) {
              destroyPopup();
              document.removeEventListener("click", onOutside, true);
              resetTimer();
            }
          };
          setTimeout(() => document.addEventListener("click", onOutside, true), 0);
        };
        toastEl.addEventListener("click", onClick);
        toastEl._cleanJump = () => {
          destroyPopup();
          toastEl.removeEventListener("click", onClick);
        };
      }
    }
  }

  let _warnHideTimer = null;
  function showWarnToast(msg) {
    clearTimeout(_warnHideTimer);
    let toastEl = document.querySelector(".flcu-toast");
    if (!toastEl) {
      toastEl = document.createElement("div");
      toastEl.className = "flcu-toast";
      document.body.appendChild(toastEl);
    }
    document.getElementById("flcu-jump-popup")?.remove();
    toastEl._cleanJump?.();

    toastEl.innerHTML = "";
    const msgSpan = document.createElement("span");
    msgSpan.className = "flcu-toast-msg";
    msgSpan.textContent = msg;
    toastEl.appendChild(msgSpan);

    toastEl.classList.remove("show", "hiding", "flcu-toast-jumpable");
    toastEl.classList.add("flcu-toast-warn");
    void toastEl.offsetWidth;
    toastEl.classList.add("show");

    const hideWarn = () => {
      toastEl.classList.add("hiding");
      setTimeout(() => {
        toastEl.classList.remove("show", "hiding", "flcu-toast-warn");
      }, 230);
    };
    _warnHideTimer = setTimeout(hideWarn, INPUT_WARN_WINDOW);
  }

  document.addEventListener("keydown", (e) => {
    if (e.repeat) return;
    const config = getConfig();

    const isGlobalShortcut = (() => {
      if (!config.shortcut) return false;
      const s = config.shortcut;
      return (
        e.ctrlKey === !!s.ctrl &&
        e.altKey === !!s.alt &&
        e.shiftKey === !!s.shift &&
        e.metaKey === !!s.meta &&
        (e.key.toUpperCase() === s.key || e.key === s.key)
      );
    })();

    if (isInput(e.target)) {
      const now = Date.now();
      const isDoubleTriggerKey =
        e.key === config.triggerKey &&
        now - lastPressTime < config.doublePressDelay;

      if (isGlobalShortcut || isDoubleTriggerKey) {
        if (now - lastInputWarnTime < INPUT_WARN_WINDOW) {
          lastInputWarnTime = 0;
          clearTimeout(_warnHideTimer);
          const warnEl = document.querySelector(".flcu-toast");
          if (warnEl) warnEl.classList.remove("show", "flcu-toast-warn");
          triggerSmartAction();
        } else {
          lastInputWarnTime = now;
          showWarnToast(t("toast_input_focus_warn"));
        }
      } else if (e.key === config.triggerKey) {
        lastPressTime = now;
      } else if (!["Control", "Alt", "Shift", "Meta"].includes(e.key)) {
        lastPressTime = 0;
      }
      return;
    }

    if (isGlobalShortcut) {
      e.preventDefault();
      triggerSmartAction();
      return;
    }
    if (e.key === config.triggerKey) {
      const now = Date.now();
      if (now - lastPressTime < config.doublePressDelay) {
        e.preventDefault();
        triggerSmartAction();
        lastPressTime = 0;
      } else {
        lastPressTime = now;
      }
    } else if (!["Control", "Alt", "Shift", "Meta"].includes(e.key)) {
      lastPressTime = 0;
    }
  });

  if (typeof GM_registerMenuCommand !== "undefined") {
    GM_registerMenuCommand("🛠️ Open Link Conversion Panel", () => {
      createMenu();
    });
  }
})();