feat: 论坛 emoji 表情支持

- 新增 dyEmoji 表情库与解析测试、EmojiPicker 选择器与 EmojiImg 组件
- Markdown 编辑器/渲染支持表情图片，新增 public/emoji 资源与生成脚本
- 聊天室与首页适配

frontend/app/chat/[id]/ChatRoomClient.tsx

@@ -17,6 +17,7 @@ import {
   Reply,
   Copy,
   ChevronsDown,
+  Smile,
 } from "lucide-react";
 import {
   apiListChatMessages,
@@ -56,6 +57,9 @@ import AutolinkText from "@/components/AutolinkText";
 import ConfirmDialog from "@/components/ConfirmDialog";
 import ContextMenu, { type CtxMenuItem } from "@/components/ContextMenu";
 import ChatUserCard, { type ChatUserCardTarget } from "@/components/ChatUserCard";
+import EmojiPicker from "@/components/EmojiPicker";
+import EmojiImg from "@/components/EmojiImg";
+import { collectDyEmojiSpans, dyEmojiUrl } from "@/lib/dyEmoji";
 import { userPath } from "@/lib/urlStyle";
 import { useUrlStyle } from "@/components/SiteBrandProvider";
 
@@ -216,16 +220,36 @@ function highlightMentions(
   users: Map<string, User>,
   onOpenCard: (u: User) => void
 ) {
-  const parts: React.ReactNode[] = [];
+  if (!content) return null;
+  // 合并 @提及 与表情短代码 span（互不重叠：短代码字符集内无 @）
+  const emojiSpans = collectDyEmojiSpans(content);
+  const inEmoji = new Array<boolean>(content.length).fill(false);
+  for (const s of emojiSpans) {
+    for (let j = s.start; j < s.end; j++) inEmoji[j] = true;
+  }
+
+  // 纯表情消息（去掉短代码后只剩空白）按贴纸大图渲染
+  let rest = "";
+  let emojiPrev = 0;
+  for (const s of emojiSpans) {
+    rest += content.slice(emojiPrev, s.start);
+    emojiPrev = s.end;
+  }
+  rest += content.slice(emojiPrev);
+  const emojiOnly = emojiSpans.length > 0 && rest.trim() === "";
+
+  type Span = { start: number; end: number; node: React.ReactNode };
+  const spans: Span[] = [];
   const re = /@([A-Za-z0-9_-]{3,32})/g;
-  let last = 0;
   let m: RegExpExecArray | null;
   let i = 0;
   while ((m = re.exec(content)) !== null) {
-    if (m.index > last) parts.push(content.slice(last, m.index));
+    if (inEmoji[m.index]) continue;
     const user = users.get(m[1].toLowerCase());
-    parts.push(
-      user ? (
+    spans.push({
+      start: m.index,
+      end: m.index + m[0].length,
+      node: user ? (
         <button
           key={`m-${i}`}
           type="button"
@@ -240,12 +264,33 @@ function highlightMentions(
         </button>
       ) : (
         <span key={`m-${i}`}>@{m[1]}</span>
-      )
-    );
-    last = m.index + m[0].length;
+      ),
+    });
     i++;
   }
-  if (last < content.length) parts.push(content.slice(last));
+  for (const s of emojiSpans) {
+    spans.push({
+      start: s.start,
+      end: s.end,
+      node: (
+        <EmojiImg
+          key={`e-${s.start}`}
+          k={s.key}
+          className={`j13-chat-emoji${emojiOnly ? " j13-chat-emoji-lg" : ""}`}
+        />
+      ),
+    });
+  }
+  spans.sort((a, b) => a.start - b.start);
+
+  const parts: React.ReactNode[] = [];
+  let prev = 0;
+  spans.forEach((s) => {
+    if (s.start > prev) parts.push(content.slice(prev, s.start));
+    parts.push(s.node);
+    prev = s.end;
+  });
+  if (prev < content.length) parts.push(content.slice(prev));
   return parts;
 }
 
@@ -306,25 +351,163 @@ function collectMentionSpans(
   return spans.sort((a, b) => a.start - b.start);
 }
 
-/** 输入区镜像层：已确认的 @ 以蓝色昵称呈现（胶囊样式在发出后的气泡里） */
-function renderComposerMirror(content: string, tokens: Map<string, string>) {
-  if (!content) return null;
-  const spans = collectMentionSpans(content, tokens);
-  const parts: React.ReactNode[] = [];
-  let last = 0;
-  spans.forEach((s, i) => {
-    if (s.start > last) parts.push(content.slice(last, s.start));
-    parts.push(
-      <span key={`t-${i}`} className="j13-mention-token">
-        @{s.key}
-      </span>
-    );
-    last = s.end;
+/**
+ * 富输入区（contentEditable）：编辑框内直接渲染表情图片与 @ 昵称胶囊，
+ * content 状态始终保存纯文本（表情为 [:key:] 短代码、@ 为 @昵称），
+ * 发送/提醒/草稿等既有字符串逻辑不变。DOM 为临时视图，外部内容变更时整树重建。
+ */
+const ZWSP = "\u200B";
+
+/** DOM 子树 → 纯文本长度（表情短代码按 data-sc 长度计，ZWSP 不计） */
+function richNodeLen(node: Node): number {
+  if (node.nodeType === Node.TEXT_NODE) {
+    return (node as Text).data.split(ZWSP).join("").length;
+  }
+  if (node.nodeType !== Node.ELEMENT_NODE) return 0;
+  const el = node as HTMLElement;
+  if (el.tagName === "IMG" && el.dataset.sc) return el.dataset.sc.length;
+  if (el.tagName === "BR") return 1;
+  let sum = 0;
+  el.childNodes.forEach((c) => {
+    sum += richNodeLen(c);
   });
-  if (last < content.length) parts.push(content.slice(last));
-  // 末尾换行在 pre-wrap 镜像里需要占位，否则高度会少一行
-  if (content.endsWith("\n")) parts.push("\n");
-  return parts;
+  return sum;
+}
+
+/** contentEditable DOM → content 纯文本 */
+function domToText(root: HTMLElement): string {
+  let out = "";
+  root.childNodes.forEach((node) => {
+    out += serializeRichNode(node);
+  });
+  return out;
+}
+
+function serializeRichNode(node: Node): string {
+  if (node.nodeType === Node.TEXT_NODE) {
+    return (node as Text).data.split(ZWSP).join("");
+  }
+  if (node.nodeType !== Node.ELEMENT_NODE) return "";
+  const el = node as HTMLElement;
+  if (el.tagName === "IMG" && el.dataset.sc) return el.dataset.sc;
+  if (el.tagName === "BR") return "\n";
+  let out = "";
+  el.childNodes.forEach((c) => {
+    out += serializeRichNode(c);
+  });
+  return out;
+}
+
+/** 光标在 content 纯文本中的偏移（表情按短代码长度、@ 胶囊按昵称长度计） */
+function richCaretOffset(root: HTMLElement, container: Node, offsetIdx: number): number {
+  let count = 0;
+  let node: Node | null = container;
+  while (node && node !== root) {
+    const parent: HTMLElement | null = node.parentElement;
+    if (!parent) break;
+    let sib: Node | null = node.previousSibling;
+    while (sib) {
+      count += richNodeLen(sib);
+      sib = sib.previousSibling;
+    }
+    node = parent;
+  }
+  if (container.nodeType === Node.TEXT_NODE) {
+    count += (container as Text).data.slice(0, offsetIdx).split(ZWSP).join("").length;
+  } else if (container.nodeType === Node.ELEMENT_NODE) {
+    const kids = (container as Element).childNodes;
+    for (let i = 0; i < offsetIdx && i < kids.length; i++) {
+      count += richNodeLen(kids[i]);
+    }
+  }
+  return count;
+}
+
+/** content 纯文本偏移 → DOM 位置（仅用于定位纯文本区间，如 @ 触发串） */
+function richResolveOffset(
+  root: HTMLElement,
+  target: number
+): { node: Node; offset: number } {
+  let acc = 0;
+  const kids = root.childNodes;
+  for (let i = 0; i < kids.length; i++) {
+    const child = kids[i];
+    const len = richNodeLen(child);
+    if (target < acc + len) {
+      if (child.nodeType === Node.TEXT_NODE) {
+        // 文本节点可能以零宽字符开头（表情后输入的文本），偏移需按可见字符折算
+        const t = child as Text;
+        const data = t.data;
+        let j = 0;
+        while (j < data.length && data[j] === ZWSP) j++;
+        let need = target - acc;
+        while (j < data.length && need > 0) {
+          if (data[j] !== ZWSP) need--;
+          j++;
+        }
+        return { node: t, offset: j };
+      }
+      return { node: root, offset: i };
+    }
+    acc += len;
+  }
+  return { node: root, offset: kids.length };
+}
+
+/** content 纯文本 → 富 DOM（表情图 + @ 昵称胶囊 + 文本） */
+function rebuildRichInput(
+  el: HTMLElement,
+  text: string,
+  tokens: Map<string, string>
+) {
+  el.textContent = "";
+  const frag = document.createDocumentFragment();
+  const pieces = [
+    ...collectMentionSpans(text, tokens).map((s) => ({ ...s, kind: "mention" as const })),
+    ...collectDyEmojiSpans(text).map((s) => ({ ...s, kind: "emoji" as const })),
+  ].sort((a, b) => a.start - b.start);
+  let last = 0;
+  for (const p of pieces) {
+    if (p.start < last) continue; // 与 @ 胶囊重叠的表情跳过
+    if (p.start > last) {
+      frag.appendChild(document.createTextNode(text.slice(last, p.start)));
+    }
+    if (p.kind === "mention") {
+      const span = document.createElement("span");
+      span.className = "j13-mention-token";
+      span.contentEditable = "false";
+      span.textContent = `@${p.key}`;
+      frag.appendChild(span);
+    } else {
+      frag.appendChild(makeEmojiNode(p.key));
+    }
+    last = p.end;
+  }
+  if (last < text.length) {
+    frag.appendChild(document.createTextNode(text.slice(last)));
+  }
+  el.appendChild(frag);
+}
+
+function makeEmojiNode(key: string): HTMLImageElement {
+  const img = document.createElement("img");
+  img.src = dyEmojiUrl(key);
+  img.dataset.sc = `[:${key}:]`;
+  img.alt = "表情";
+  img.title = `[:${key}:]`;
+  img.draggable = false;
+  img.className = "j13-input-emoji";
+  return img;
+}
+
+function placeCaretEnd(el: HTMLElement) {
+  const sel = window.getSelection();
+  if (!sel) return;
+  const range = document.createRange();
+  range.selectNodeContents(el);
+  range.collapse(false);
+  sel.removeAllRanges();
+  sel.addRange(range);
 }
 
 /** 发送前翻译：@昵称 → @用户名（后端按用户名解析提及） */
@@ -371,35 +554,6 @@ function hydrateMentionsIn(
   return { text: out, tokens };
 }
 
-/** 光标前是否紧贴一个已确认的 @token（含可选尾随空格） */
-function mentionTokenBefore(
-  text: string,
-  cursor: number,
-  tokens: Map<string, string>
-): { start: number; end: number } | null {
-  for (const s of collectMentionSpans(text, tokens)) {
-    if (s.end === cursor) return { start: s.start, end: cursor };
-    if (s.end + 1 === cursor && text[s.end] === " ") {
-      return { start: s.start, end: cursor };
-    }
-  }
-  return null;
-}
-
-/** 光标后是否紧跟一个已确认的 @token（含可选尾随空格） */
-function mentionTokenAfter(
-  text: string,
-  cursor: number,
-  tokens: Map<string, string>
-): { start: number; end: number } | null {
-  for (const s of collectMentionSpans(text, tokens)) {
-    if (s.start !== cursor) continue;
-    const end = s.end < text.length && text[s.end] === " " ? s.end + 1 : s.end;
-    return { start: cursor, end };
-  }
-  return null;
-}
-
 export default function ChatRoomClient({
   roomId,
   roomName,
@@ -443,6 +597,7 @@ export default function ChatRoomClient({
   const [mentionOpen, setMentionOpen] = useState(false);
   const [mentionFilter, setMentionFilter] = useState("");
   const [mentionIndex, setMentionIndex] = useState(0);
+  const [emojiOpen, setEmojiOpen] = useState(false);
   /** 从选择器/悬浮确认插入的 @：key=展示昵称，value=用户名（发送时翻译回） */
   const [mentionTokens, setMentionTokens] = useState<Map<string, string>>(
     () => new Map()
@@ -456,9 +611,52 @@ export default function ChatRoomClient({
   const longPressTimer = useRef<ReturnType<typeof setTimeout> | null>(null);
 
   const listRef = useRef<HTMLDivElement>(null);
-  const inputRef = useRef<HTMLTextAreaElement>(null);
-  const mirrorRef = useRef<HTMLDivElement>(null);
+  const inputRef = useRef<HTMLDivElement>(null);
+  /** 富输入区最近一次同步到 DOM 的 content 纯文本（区分内部输入与外部内容变更） */
+  const lastRichText = useRef<string>("");
   const msgRefs = useRef<Map<number, HTMLDivElement>>(new Map());
+  const composerBoxRef = useRef<HTMLDivElement>(null);
+  /** 表情按钮+面板容器：外点（含点击输入框）即关面板 */
+  const emojiPanelWrapRef = useRef<HTMLDivElement>(null);
+
+  // iOS/WebKit 不支持 interactive-widget=resizes-content（仅 Android Chrome 生效）：
+  // 软键盘弹出时直接盖住锁视口布局的底部输入框，页面 overflow:hidden 又无处可滚。
+  // 监听 visualViewport，把 composer 整体上移键盘遮挡高度，并给消息列表加同等
+  // 底部内边距让最新消息保持在输入框上方。Android 下遮挡恒为 0，自动空转。
+  // 不按聚焦状态门控：键盘未收起期间保持位移，避免点发送按钮时按钮下移丢点击；
+  // 用 scale===1 排除双指缩放造成的 visualViewport 变化（键盘不改变 scale）。
+  useEffect(() => {
+    const vv = window.visualViewport;
+    const composerBox = composerBoxRef.current;
+    if (!vv || !composerBox) return;
+    let raf = 0;
+    const apply = () => {
+      raf = 0;
+      const overlap = Math.round(
+        window.innerHeight - vv.offsetTop - vv.height
+      );
+      const list = listRef.current;
+      if (overlap > 80 && vv.scale === 1) {
+        composerBox.style.transform = `translateY(-${overlap}px)`;
+        if (list) list.style.paddingBottom = `${overlap + 16}px`;
+      } else {
+        composerBox.style.transform = "";
+        if (list) list.style.paddingBottom = "";
+      }
+    };
+    const schedule = () => {
+      if (!raf) raf = requestAnimationFrame(apply);
+    };
+    vv.addEventListener("resize", schedule);
+    vv.addEventListener("scroll", schedule);
+    return () => {
+      vv.removeEventListener("resize", schedule);
+      vv.removeEventListener("scroll", schedule);
+      if (raf) cancelAnimationFrame(raf);
+      composerBox.style.transform = "";
+      if (listRef.current) listRef.current.style.paddingBottom = "";
+    };
+  }, []);
 
   const isOwner = myRole === "owner";
   const isRoomAdmin = myRole === "admin";
@@ -773,9 +971,10 @@ export default function ChatRoomClient({
   })();
 
   /**
-   * 插入 @提及：
+   * 插入 @提及（DOM 级操作）：
    * - replaceTrigger：替换光标前未完成的 "@xx" 触发串（选择器路径）
    * - 否则在光标处追加（昵称悬浮 @ 路径），必要时补前导空格
+   * 插入后序列化 DOM 回 content 纯文本并记录 昵称→用户名 映射
    */
   const insertMention = (
     username: string,
@@ -783,29 +982,56 @@ export default function ChatRoomClient({
     opts?: { replaceTrigger?: boolean }
   ) => {
     const el = inputRef.current;
-    const val = content;
-    const cursor = el?.selectionStart ?? val.length;
-    let before = val.slice(0, cursor);
-    const after = val.slice(cursor);
-    if (opts?.replaceTrigger) {
-      const at = before.lastIndexOf("@");
-      if (at >= 0) before = before.slice(0, at);
-    } else if (before && !/\s$/.test(before)) {
-      before = `${before} `;
+    if (!el) return;
+    el.focus();
+    const sel = window.getSelection();
+    let range: Range;
+    if (sel && sel.rangeCount > 0 && el.contains(sel.getRangeAt(0).startContainer)) {
+      range = sel.getRangeAt(0);
+    } else {
+      range = document.createRange();
+      range.selectNodeContents(el);
+      range.collapse(false);
     }
-    // 编辑框直接写入昵称（宽度即昵称宽度），映射表记录昵称→用户名
+    const caret = richCaretOffset(el, range.startContainer, range.startOffset);
+    const text = domToText(el);
     const display = nickname || username;
-    const next = `${before}@${display} ${after}`;
+    let removeStart = caret;
+    let leadSpace = false;
+    if (opts?.replaceTrigger) {
+      const at = text.slice(0, caret).lastIndexOf("@");
+      if (at >= 0) removeStart = at;
+    } else if (caret > 0 && text[caret - 1] && !/\s/.test(text[caret - 1])) {
+      leadSpace = true;
+    }
+    const span = document.createElement("span");
+    span.className = "j13-mention-token";
+    span.contentEditable = "false";
+    span.textContent = `@${display}`;
+    const space = document.createTextNode(" ");
+    const p1 = richResolveOffset(el, removeStart);
+    const r2 = document.createRange();
+    r2.setStart(p1.node, p1.offset);
+    const p2 = richResolveOffset(el, caret);
+    r2.setEnd(p2.node, p2.offset);
+    r2.deleteContents();
+    const frag = document.createDocumentFragment();
+    if (leadSpace) frag.appendChild(document.createTextNode(" "));
+    frag.appendChild(span);
+    frag.appendChild(space);
+    r2.insertNode(frag);
+    const r3 = document.createRange();
+    r3.setStartAfter(space);
+    r3.collapse(true);
+    sel?.removeAllRanges();
+    sel?.addRange(r3);
+    const next = domToText(el);
+    lastRichText.current = next;
     setContent(next);
     setMentionTokens((prev) => new Map(prev).set(display, username));
     setMentionOpen(false);
     setMentionFilter("");
-    requestAnimationFrame(() => {
-      const pos = before.length + display.length + 2;
-      el?.focus();
-      el?.setSelectionRange(pos, pos);
-      syncComposerHeight();
-    });
+    requestAnimationFrame(syncComposerHeight);
   };
 
   const pruneMentionTokens = (text: string, tokens: Map<string, string>) => {
@@ -821,12 +1047,98 @@ export default function ChatRoomClient({
     return next;
   };
 
-  const onComposerChange = (raw: string) => {
-    setContent(raw);
-    setMentionTokens((prev) => pruneMentionTokens(raw, prev));
+  /** 表情面板：外点（含输入框）/ Esc 关闭 */
+  useEffect(() => {
+    if (!emojiOpen) return;
+    const onDoc = (e: MouseEvent) => {
+      if (
+        emojiPanelWrapRef.current &&
+        !emojiPanelWrapRef.current.contains(e.target as Node)
+      ) {
+        setEmojiOpen(false);
+      }
+    };
+    const onKey = (e: KeyboardEvent) => {
+      if (e.key !== "Escape") return;
+      e.stopPropagation();
+      setEmojiOpen(false);
+      inputRef.current?.focus();
+    };
+    document.addEventListener("mousedown", onDoc);
+    document.addEventListener("keydown", onKey, true);
+    return () => {
+      document.removeEventListener("mousedown", onDoc);
+      document.removeEventListener("keydown", onKey, true);
+    };
+  }, [emojiOpen]);
+
+  /** 表情面板选表情：光标处插入表情图节点，选完即关面板 */
+  const insertEmoji = (key: string) => {
     const el = inputRef.current;
-    const cursor = el?.selectionStart ?? raw.length;
-    const before = raw.slice(0, cursor);
+    if (!el) return;
+    setEmojiOpen(false);
+    el.focus();
+    const sel = window.getSelection();
+    let range: Range;
+    if (sel && sel.rangeCount > 0 && el.contains(sel.getRangeAt(0).startContainer)) {
+      range = sel.getRangeAt(0);
+    } else {
+      range = document.createRange();
+      range.selectNodeContents(el);
+      range.collapse(false);
+    }
+    range.deleteContents();
+    const img = makeEmojiNode(key);
+    range.insertNode(img);
+    // 表情后补零宽空格，给光标一个落点（序列化时剔除）
+    const zw = document.createTextNode(ZWSP);
+    range.setStartAfter(img);
+    range.collapse(true);
+    range.insertNode(zw);
+    range.setStartAfter(zw);
+    range.collapse(true);
+    sel?.removeAllRanges();
+    sel?.addRange(range);
+    const next = domToText(el);
+    lastRichText.current = next;
+    setContent(next);
+    setMentionTokens((prev) => pruneMentionTokens(next, prev));
+    requestAnimationFrame(syncComposerHeight);
+  };
+
+  /** 外部内容变更（清空/草稿/撤回后恢复等）→ 重建富 DOM；内部输入不触发（DOM 即视图） */
+  useEffect(() => {
+    const el = inputRef.current;
+    if (!el || lastRichText.current === content) return;
+    rebuildRichInput(el, content, mentionTokens);
+    lastRichText.current = content;
+    if (document.activeElement === el) placeCaretEnd(el);
+    requestAnimationFrame(syncComposerHeight);
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [content, mentionTokens]);
+
+  const handleRichInput = () => {
+    const el = inputRef.current;
+    if (!el) return;
+    const text = domToText(el);
+    if (text === lastRichText.current) return;
+    if (text.length > 2000) {
+      // 超 2000 字：回滚到上次合法内容
+      rebuildRichInput(el, lastRichText.current, mentionTokens);
+      placeCaretEnd(el);
+      return;
+    }
+    lastRichText.current = text;
+    setContent(text);
+    setMentionTokens((prev) => pruneMentionTokens(text, prev));
+    // @ 触发检测（与原 textarea 逻辑一致）
+    const sel = window.getSelection();
+    let caret = text.length;
+    if (sel && sel.rangeCount > 0) {
+      const r = sel.getRangeAt(0);
+      caret = richCaretOffset(el, r.startContainer, r.startOffset);
+    }
+    const before = text.slice(0, caret);
     const m = before.match(/@([^\s@]{0,32})$/);
     if (m && isRealMember && !isDirect) {
       setMentionOpen(true);
@@ -838,7 +1150,9 @@ export default function ChatRoomClient({
     }
   };
 
-  const onKeyDown = (e: React.KeyboardEvent<HTMLTextAreaElement>) => {
+  const handleRichKeyDown = (e: React.KeyboardEvent<HTMLDivElement>) => {
+    // IME 组合中不拦截按键
+    if (e.nativeEvent.isComposing || e.keyCode === 229) return;
     if (mentionOpen && mentionCandidates.length > 0) {
       if (e.key === "ArrowDown") {
         e.preventDefault();
@@ -870,76 +1184,44 @@ export default function ChatRoomClient({
         return;
       }
     }
-
-    const el = e.currentTarget;
-    const start = el.selectionStart;
-    const end = el.selectionEnd;
-
-    // 已确认 @token 按整体跳过 / 删除（飞书体验）
-    if (start === end && mentionTokens.size > 0) {
-      if (e.key === "Backspace") {
-        const range = mentionTokenBefore(content, start, mentionTokens);
-        if (range) {
-          e.preventDefault();
-          const next = content.slice(0, range.start) + content.slice(range.end);
-          onComposerChange(next);
-          requestAnimationFrame(() => {
-            el.setSelectionRange(range.start, range.start);
-            syncComposerHeight();
-          });
-          return;
-        }
-      }
-      if (e.key === "Delete") {
-        const range = mentionTokenAfter(content, start, mentionTokens);
-        if (range) {
-          e.preventDefault();
-          const next = content.slice(0, range.start) + content.slice(range.end);
-          onComposerChange(next);
-          requestAnimationFrame(() => {
-            el.setSelectionRange(range.start, range.start);
-            syncComposerHeight();
-          });
-          return;
-        }
-      }
-      if (e.key === "ArrowLeft" && !e.shiftKey) {
-        const range = mentionTokenBefore(content, start, mentionTokens);
-        if (range) {
-          e.preventDefault();
-          el.setSelectionRange(range.start, range.start);
-          return;
-        }
-      }
-      if (e.key === "ArrowRight" && !e.shiftKey) {
-        const range = mentionTokenAfter(content, start, mentionTokens);
-        if (range) {
-          e.preventDefault();
-          el.setSelectionRange(range.end, range.end);
-          return;
-        }
-      }
-    }
-
-    if (e.key === "Enter" && !e.shiftKey) {
+    if (e.key === "Enter") {
       e.preventDefault();
+      if (e.shiftKey) {
+        document.execCommand("insertLineBreak");
+      } else {
         send();
       }
+    }
   };
 
-  /** 光标落点在已确认 @token 内部时吸附到 token 末尾（token 原子化，飞书体验） */
-  const onComposerSelect = () => {
+  /** 粘贴一律按纯文本插入（换行转 <br>），避免富文本结构污染序列化 */
+  const handleRichPaste = (e: React.ClipboardEvent<HTMLDivElement>) => {
+    e.preventDefault();
+    const text = e.clipboardData.getData("text/plain");
+    if (!text) return;
     const el = inputRef.current;
-    if (!el || mentionTokens.size === 0) return;
-    const start = el.selectionStart;
-    const end = el.selectionEnd;
-    if (start !== end) return;
-    for (const s of collectMentionSpans(content, mentionTokens)) {
-      if (start > s.start && start < s.end) {
-        el.setSelectionRange(s.end, s.end);
-        return;
-      }
+    if (!el) return;
+    const sel = window.getSelection();
+    let range: Range;
+    if (sel && sel.rangeCount > 0 && el.contains(sel.getRangeAt(0).startContainer)) {
+      range = sel.getRangeAt(0);
+    } else {
+      range = document.createRange();
+      range.selectNodeContents(el);
+      range.collapse(false);
     }
+    range.deleteContents();
+    const frag = document.createDocumentFragment();
+    const lines = text.replace(/\r\n/g, "\n").split("\n");
+    lines.forEach((line, i) => {
+      if (i > 0) frag.appendChild(document.createElement("br"));
+      if (line) frag.appendChild(document.createTextNode(line));
+    });
+    range.insertNode(frag);
+    range.collapse(false);
+    sel?.removeAllRanges();
+    sel?.addRange(range);
+    handleRichInput();
   };
 
   const openMsgMenu = (m: ChatMessage, x: number, y: number) => {
@@ -1117,9 +1399,8 @@ export default function ChatRoomClient({
       const el = inputRef.current;
       if (!el) return;
       el.focus();
-      el.setSelectionRange(display.length, display.length);
-      el.style.height = "auto";
-      el.style.height = `${Math.min(el.scrollHeight, 120)}px`;
+      placeCaretEnd(el);
+      syncComposerHeight();
     });
   };
 
@@ -1650,8 +1931,12 @@ export default function ChatRoomClient({
 
         {isRealMember ? (
           <div
+            ref={composerBoxRef}
             className="shrink-0 px-3 sm:px-4 py-3"
-            style={{ borderTop: "1px solid var(--line)" }}
+            style={{
+              borderTop: "1px solid var(--line)",
+              background: "var(--panel)",
+            }}
           >
             {replyTo && (
               <div
@@ -1735,57 +2020,50 @@ export default function ChatRoomClient({
                   // 点空白/内边距时聚焦输入，避免抢走发送按钮的点击
                   const t = e.target as HTMLElement;
                   if (t.closest("button, a, [role='button']")) return;
-                  if (t.tagName === "TEXTAREA") return;
+                  if (t.closest("[contenteditable='true']")) return;
                   e.preventDefault();
                   inputRef.current?.focus();
                 }}
               >
-                <div className="relative flex-1 min-w-0 self-stretch flex items-center">
-                  {content ? (
-                    <div
-                      ref={mirrorRef}
-                      className="j13-chat-composer-mirror text-[14px] leading-5 py-2"
-                      aria-hidden
-                    >
-                      {renderComposerMirror(content, mentionTokens)}
-                    </div>
-                  ) : null}
-                  <textarea
-                    ref={inputRef}
-                    value={content}
-                    onChange={(e) => onComposerChange(e.target.value)}
-                    onKeyDown={onKeyDown}
-                    onSelect={onComposerSelect}
-                    onScroll={(e) => {
-                      if (mirrorRef.current) {
-                        mirrorRef.current.scrollTop = e.currentTarget.scrollTop;
-                        mirrorRef.current.scrollLeft = e.currentTarget.scrollLeft;
-                      }
-                    }}
-                    rows={1}
-                    placeholder={
-                      isDirect
-                        ? "输入消息…"
-                        : "输入消息，@ 可提醒成员"
-                    }
-                    maxLength={2000}
-                    className={`j13-chat-scroll j13-chat-composer-input relative w-full bg-transparent text-[14px] leading-5 py-2 max-h-32 min-h-[36px]${
-                      content ? " has-value" : ""
+                <div className="relative shrink-0 flex items-center" ref={emojiPanelWrapRef}>
+                  <button
+                    type="button"
+                    className={`w-9 h-9 flex items-center justify-center rounded-full shrink-0 transition-colors${
+                      emojiOpen ? " bg-[var(--accent-soft)]" : " hover:bg-[var(--panel-2)]"
                     }`}
-                    style={{ color: content ? undefined : "var(--ink)" }}
+                    style={{ color: emojiOpen ? "var(--accent)" : "var(--ink-2)" }}
+                    aria-label="表情"
+                    aria-expanded={emojiOpen}
+                    onMouseDown={(e) => e.preventDefault()}
+                    onClick={() => setEmojiOpen((v) => !v)}
+                  >
+                    <Smile size={19} />
+                  </button>
+                  {emojiOpen && (
+                    <div className="j13-chat-emoji-panel">
+                      <EmojiPicker onPick={insertEmoji} />
+                    </div>
+                  )}
+                </div>
+                <div
+                  ref={inputRef}
+                  contentEditable
+                  suppressContentEditableWarning
+                  role="textbox"
+                  aria-multiline="true"
+                  aria-label="输入消息"
+                  data-placeholder={isDirect ? "输入消息…" : "输入消息，@ 可提醒成员"}
+                  className="j13-chat-scroll j13-chat-composer-input j13-chat-rich-input relative flex-1 min-w-0 text-[14px] leading-5 py-2"
+                  onInput={handleRichInput}
+                  onKeyDown={handleRichKeyDown}
+                  onPaste={handleRichPaste}
                   onFocus={(e) => {
                     // 键盘弹出兜底：把输入框滚入可视区（个别浏览器
                     // interactiveWidget=resizes-content 不生效时仍能聚焦可见）
                     const composer = e.currentTarget.closest(".j13-chat-composer");
                     composer?.scrollIntoView({ block: "end", behavior: "smooth" });
                   }}
-                    onInput={(e) => {
-                      const t = e.currentTarget;
-                      t.style.height = "auto";
-                      t.style.height = Math.min(t.scrollHeight, 128) + "px";
-                    }}
                 />
-                </div>
                 <button
                   type="button"
                   onClick={send}

frontend/app/globals.css

@@ -3662,20 +3662,50 @@ select:focus-visible {
 .j13-chat-composer-input:focus-visible {
   outline: none !important;
   box-shadow: none !important;
-  resize: none !important;
 }
-.j13-chat-composer-input.has-value {
-  color: transparent;
+/* 富输入区（contentEditable）：表情图片与 @ 胶囊直接在输入框内渲染 */
+.j13-chat-rich-input {
+  white-space: pre-wrap;
+  overflow-wrap: break-word;
+  word-break: break-word;
+  overflow-y: auto;
+  cursor: text;
+  min-height: 36px;
+  max-height: 128px;
+  color: var(--ink);
   caret-color: var(--ink);
 }
-/* 框选时 ::selection 前景色会盖过透明字色，露出底层真实文本（@用户名）；
-   这里保持字形透明 + 半透明高亮，让镜像层的 @昵称 透出（宽度已补偿对齐） */
-.j13-chat-composer-input.has-value::selection {
-  background: color-mix(in srgb, var(--accent) 24%, transparent);
-  color: transparent;
+.j13-chat-rich-input:empty::before {
+  content: attr(data-placeholder);
+  color: var(--ink-3);
+  pointer-events: none;
 }
-.j13-chat-composer-input.has-value::placeholder {
-  color: transparent;
+.j13-input-emoji {
+  display: inline-block;
+  width: 20px;
+  height: 20px;
+  object-fit: contain;
+  /* 与汉字视觉居中：汉字字面中心在基线上方 ≈0.385em，vertical-align = 0.385×字号 − 图高/2
+     20px 图 @14px 字号：5.4 − 10 = −4.6（负值=图片下沉；middle 会以 x-height 对齐导致偏下） */
+  vertical-align: -4.6px;
+  margin: 0 1px;
+  cursor: default;
+  user-select: none;
+  -webkit-user-select: none;
+  -webkit-touch-callout: none;
+}
+/* 输入框内的 @ 胶囊：与镜像期一致的蓝色文字风格，contenteditable=false 原子整体 */
+.j13-chat-rich-input .j13-mention-token {
+  display: inline;
+  padding: 0;
+  margin: 0;
+  line-height: inherit;
+  font-weight: 500;
+  border-radius: 0;
+  box-shadow: none;
+  background: transparent !important;
+  color: var(--accent) !important;
+  cursor: text;
 }
 
 .admin-field-shell,
@@ -3732,16 +3762,6 @@ select:focus-visible {
   width: 0;
   height: 0;
 }
-.j13-chat-composer-mirror {
-  position: absolute;
-  inset: 0;
-  overflow: hidden;
-  pointer-events: none;
-  white-space: pre-wrap;
-  overflow-wrap: break-word;
-  word-break: break-word;
-  color: var(--ink);
-}
 .j13-mention-token {
   display: inline-block;
   padding: 2px 8px;
@@ -3768,19 +3788,6 @@ a.j13-mention-token:hover {
   background: var(--accent);
   color: var(--accent-on) !important;
 }
-/* 输入镜像层：token 仅蓝色文字（胶囊样式只在发出后的气泡里显示）；
-   基础胶囊色带 !important，此处需同权重覆盖 */
-.j13-chat-composer-mirror .j13-mention-token {
-  display: inline;
-  padding: 0;
-  margin: 0;
-  line-height: inherit;
-  font-weight: 500;
-  border-radius: 0;
-  box-shadow: none;
-  background: transparent !important;
-  color: var(--accent) !important;
-}
 
 @layer components {
   /* ----- 小标签（旧名 .kicker 保留兼容） ----- */
@@ -8586,6 +8593,8 @@ html.dark .prose-content pre[data-theme] span {
 }
 
 /* 首页桌面：顶部留白 20px → 8px，中栏信息流上移贴页头；
+   main 变 flex 列、三栏区 flex:1 撑满 main——分隔线不随帖子数量缩短，
+   从页头下沿贯通到页脚上沿；
    sticky 侧栏的 --rail-top/--rail-max-h 在 #main 上重算（custom property
    在声明处求值，:root 的 --rail-max-h 不会因子级重定义 --rail-top 而更新） */
 @media (min-width: 1024px) {
@@ -8593,6 +8602,13 @@ html.dark .prose-content pre[data-theme] span {
     padding-top: 0.5rem;
     --rail-top: calc(var(--header-h) + 0.5rem);
     --rail-max-h: calc(100vh - var(--rail-top) - 1rem);
+    display: flex;
+    flex-direction: column;
+  }
+  .j13-fluid-home {
+    display: flex;
+    flex-direction: column;
+    flex: 1;
   }
 }
 
@@ -8644,7 +8660,9 @@ html:not(.j13-has-site-bg) #main {
   font-size: 13px;
 }
 /* 首页三栏竖向分隔线：与页头下边线同色同宽，居中于栏间距（gap-6 / xl:gap-7），
-   画在中栏伪元素上与左右栏共用一条；类名跟随左右栏显隐，避免悬空线 */
+   画在中栏伪元素上与左右栏共用一条；类名跟随左右栏显隐，避免悬空线。
+   上接页头下边线（抵消 #main 顶部 0.5rem）、下接页脚上沿（抵消 #main 底部
+   --main-pad-y）：中栏 self-stretch 撑满行高（左右栏保持 items-start 不破坏 sticky） */
 .j13-home-sep-l,
 .j13-home-sep-r {
   position: relative;
@@ -8654,8 +8672,8 @@ html:not(.j13-has-site-bg) #main {
   .j13-home-sep-r::after {
     content: "";
     position: absolute;
-    top: 0;
-    bottom: 0;
+    top: -0.5rem;
+    bottom: calc(-1 * var(--main-pad-y));
     width: 1px;
     background: var(--line);
   }
@@ -9768,3 +9786,150 @@ html.j13-reduce-chrome .j13-att-card.is-fresh {
   min-width: 0;
 }
 
+/* ── 抖音表情（douyin-emoji）：编辑器弹层面板 / 聊天面板 / 行内图片 ── */
+.j13-emoji-picker {
+  display: flex;
+  flex-direction: column;
+  min-width: 0;
+}
+.j13-emoji-tabs {
+  display: flex;
+  gap: 2px;
+  padding: 0 0 6px;
+  border-bottom: 1px solid var(--line);
+  margin-bottom: 6px;
+}
+.j13-emoji-tabs button {
+  padding: 4px 10px;
+  border-radius: 8px;
+  border: 0;
+  appearance: none;
+  -webkit-appearance: none;
+  font-size: 12.5px;
+  font-weight: 500;
+  cursor: pointer;
+  color: var(--ink-2);
+  background: transparent;
+  transition: background 0.12s ease, color 0.12s ease;
+}
+.j13-emoji-tabs button:hover {
+  background: var(--panel-2);
+  color: var(--ink);
+}
+.j13-emoji-tabs button.is-on {
+  background: var(--accent-soft);
+  color: var(--accent);
+}
+/* 分组滚动容器：整体滚动，分组小标题随内容排列 */
+.j13-emoji-scroll {
+  max-height: 264px;
+  overflow-y: auto;
+  overscroll-behavior: contain;
+}
+.j13-emoji-group + .j13-emoji-group {
+  margin-top: 4px;
+}
+.j13-emoji-group-label {
+  padding: 6px 2px 4px;
+  font-size: 11.5px;
+  color: var(--ink-3);
+}
+.j13-emoji-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, 36px);
+  justify-content: space-between;
+  gap: 2px;
+}
+.j13-emoji-cell {
+  width: 36px;
+  height: 36px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  border: 0;
+  appearance: none;
+  -webkit-appearance: none;
+  border-radius: 8px;
+  background: transparent;
+  cursor: pointer;
+  transition: background 0.12s ease;
+}
+.j13-emoji-cell:hover {
+  background: var(--panel-2);
+}
+.j13-emoji-cell:focus-visible {
+  outline: 2px solid var(--accent);
+  outline-offset: 0;
+}
+.j13-emoji-cell img {
+  width: 28px;
+  height: 28px;
+  object-fit: contain;
+  pointer-events: none;
+}
+.j13-emoji-empty {
+  grid-column: 1 / -1;
+  text-align: center;
+  padding: 18px 0;
+}
+/* Markdown 正文中的表情：当作文字表情而非媒体图片——
+   显式关闭 .prose-content img 的边框/放大手势/hover 阴影；
+   垂直方向贴合文字视觉中线 */
+.md-content-img.j13-md-emoji,
+.prose-content img.j13-md-emoji {
+  display: inline-block;
+  width: 28px;
+  height: 28px;
+  object-fit: contain;
+  /* 与汉字视觉居中：28px 图 @16.5px 正文：6.35 − 14 = −7.7（推导同 .j13-input-emoji） */
+  vertical-align: -7.7px;
+  margin: 0 1px;
+  border: 0;
+  border-radius: 0;
+  cursor: default;
+  user-select: none;
+  -webkit-user-select: none;
+  -webkit-touch-callout: none;
+}
+/* 聊天消息气泡中的表情：视为文字表情而非图片——
+   不可选中、不可拖拽、长按/右键不出现图片操作（保存/拷贝图像等）；
+   垂直方向贴合文字视觉中线 */
+.j13-chat-emoji {
+  display: inline-block;
+  width: 28px;
+  height: 28px;
+  object-fit: contain;
+  /* 与汉字视觉居中：28px 图 @14px 字号：5.4 − 14 = −8.6（推导同 .j13-input-emoji） */
+  vertical-align: -8.6px;
+  margin: 0 1px;
+  cursor: default;
+  user-select: none;
+  -webkit-user-select: none;
+  -webkit-touch-callout: none;
+}
+/* 纯表情消息的贴纸大图 */
+.j13-chat-emoji-lg {
+  width: 96px;
+  height: 96px;
+  vertical-align: middle;
+}
+/* 编辑器弹层里的表情面板容器 */
+.j13-md-emoji-popover {
+  width: 320px;
+  max-width: calc(100vw - 32px);
+}
+/* 聊天输入区上方的表情面板 */
+.j13-chat-emoji-panel {
+  position: absolute;
+  bottom: calc(100% + 8px);
+  left: 0;
+  z-index: 40;
+  width: 320px;
+  max-width: calc(100vw - 48px);
+  padding: 10px;
+  border-radius: 14px;
+  background: var(--panel);
+  border: 1px solid var(--line);
+  box-shadow: var(--shadow-lg);
+}
+

frontend/app/page.tsx

@@ -242,7 +242,7 @@ export default async function HomePage({ searchParams }: HomePageProps) {
       <JsonLd data={listingLd} />
       <WorkspaceNavMobile boards={boards} />
 
-      <div className={`flex items-start gap-6 xl:gap-7 ${activeBoard ? "" : "lg:mt-0"}`}>
+      <div className={`flex items-start gap-6 xl:gap-7 flex-1 ${activeBoard ? "" : "lg:mt-0"}`}>
         {/* 左栏：按配置渲染（缺省 = 板块目录） */}
         {scopeLists.left.length > 0 && (
           <aside className="j13-rail-left hidden lg:block w-56 xl:w-60 shrink-0 sticky top-[var(--rail-top)] max-h-[var(--rail-max-h)]">
@@ -250,9 +250,9 @@ export default async function HomePage({ searchParams }: HomePageProps) {
           </aside>
         )}
 
-        {/* 中栏：tab 栏与帖子流为同一个整体（左栏切板块只替换这一列） */}
+        {/* 中栏：tab 栏与帖子流为同一个整体（左栏切板块只替换这一列）；self-stretch 撑满行高供分隔线贯通 */}
         <div
-          className={`flex-1 min-w-0 ${hasLeftRail ? "j13-home-sep-l" : ""} ${
+          className={`flex-1 min-w-0 self-stretch ${hasLeftRail ? "j13-home-sep-l" : ""} ${
             hasRightRail ? "j13-home-sep-r" : ""
           }`}
         >

frontend/components/EmojiImg.tsx

@@ -0,0 +1,30 @@
+"use client";
+
+import { useState } from "react";
+import { dyEmojiUrl } from "@/lib/dyEmoji";
+
+type EmojiImgProps = {
+  /** 表情 key（短代码 [:key:] 的 key） */
+  k: string;
+  className?: string;
+};
+
+/** 抖音表情小图：加载失败回退为 [表情] 文本，避免破图 */
+export default function EmojiImg({ k, className }: EmojiImgProps) {
+  const [broken, setBroken] = useState(false);
+  if (broken) {
+    return <span className={className}>[表情]</span>;
+  }
+  return (
+    // eslint-disable-next-line @next/next/no-img-element
+    <img
+      src={dyEmojiUrl(k)}
+      alt={`[:${k}:]`}
+      title={`[:${k}:]`}
+      className={className}
+      draggable={false}
+      onContextMenu={(e) => e.preventDefault()}
+      onError={() => setBroken(true)}
+    />
+  );
+}

frontend/components/EmojiPicker.tsx

@@ -0,0 +1,195 @@
+"use client";
+
+import { useEffect, useMemo, useRef, useState } from "react";
+import { DY_EMOJI_BASE, DY_EMOJI_GROUPS, dyEmojiUrl, type DyEmojiManifest } from "@/lib/dyEmoji";
+
+type EmojiPickerProps = {
+  onPick: (key: string) => void;
+};
+
+type Tab = "tos" | "fus";
+
+const CHUNK = 120;
+/** 最近使用一排的容量（与面板 8 列对齐，多了挤掉最旧的） */
+const RECENT_MAX = 8;
+const RECENT_STORAGE_KEY = "j13_dy_emoji_recent";
+
+let manifestPromise: Promise<DyEmojiManifest | null> | null = null;
+
+async function fetchManifest(): Promise<DyEmojiManifest | null> {
+  try {
+    const res = await fetch(`${DY_EMOJI_BASE}/manifest.json`);
+    if (!res.ok) return null;
+    const data = (await res.json()) as DyEmojiManifest;
+    if (!Array.isArray(data.tos) || !Array.isArray(data.fus)) return null;
+    return data;
+  } catch {
+    return null;
+  }
+}
+
+/** 拉取表情清单（模块级缓存，全站只请求一次；仅「合成」tab 使用） */
+function useDyEmojiManifest(): { manifest: DyEmojiManifest | null; failed: boolean } {
+  const [state, setState] = useState<{ manifest: DyEmojiManifest | null; failed: boolean }>({
+    manifest: null,
+    failed: false,
+  });
+  useEffect(() => {
+    if (!manifestPromise) manifestPromise = fetchManifest();
+    let cancelled = false;
+    manifestPromise.then((m) => {
+      if (!cancelled) setState({ manifest: m, failed: m === null });
+    });
+    return () => {
+      cancelled = true;
+    };
+  }, []);
+  return state;
+}
+
+function loadRecentKeys(): string[] {
+  try {
+    const raw = localStorage.getItem(RECENT_STORAGE_KEY);
+    if (!raw) return [];
+    const arr = JSON.parse(raw);
+    return Array.isArray(arr) ? arr.filter((k) => typeof k === "string").slice(0, RECENT_MAX) : [];
+  } catch {
+    return [];
+  }
+}
+
+function saveRecentKeys(keys: string[]) {
+  try {
+    localStorage.setItem(RECENT_STORAGE_KEY, JSON.stringify(keys));
+  } catch {
+    // 隐私模式等存储不可用时静默降级为会话内记忆
+  }
+}
+
+/** 记录最近使用：最新插前、去重、超出一排丢弃最旧（LRU），返回新列表 */
+function pushRecentKey(k: string): string[] {
+  const next = [k, ...loadRecentKeys().filter((x) => x !== k)].slice(0, RECENT_MAX);
+  saveRecentKeys(next);
+  return next;
+}
+
+function EmojiCell({ k, onPick }: { k: string; onPick: (k: string) => void }) {
+  return (
+    <button
+      type="button"
+      className="j13-emoji-cell"
+      aria-label={`表情 ${k}`}
+      title={`[:${k}:]`}
+      onMouseDown={(e) => e.preventDefault()}
+      onClick={() => onPick(k)}
+    >
+      {/* eslint-disable-next-line @next/next/no-img-element */}
+      <img src={dyEmojiUrl(k)} alt="" loading="lazy" draggable={false} />
+    </button>
+  );
+}
+
+/**
+ * 抖音表情面板：默认 tab 按分组排列（同类型相邻）+ 顶部最近使用一排；
+ * 合成 tab 分块渲染避免一次挂载数千图片。
+ */
+export default function EmojiPicker({ onPick }: EmojiPickerProps) {
+  const { manifest, failed } = useDyEmojiManifest();
+  const [tab, setTab] = useState<Tab>("tos");
+  const [visible, setVisible] = useState(CHUNK);
+  const [recent, setRecent] = useState<string[]>(() => loadRecentKeys());
+  const scrollRef = useRef<HTMLDivElement>(null);
+  const sentinelRef = useRef<HTMLDivElement | null>(null);
+
+  const fusKeys = useMemo(() => (manifest ? manifest.fus : []), [manifest]);
+
+  // 切 tab / 清单变化时重置分块
+  useEffect(() => {
+    setVisible(CHUNK);
+  }, [tab, manifest]);
+
+  // 合成 tab 滚动到底部分块加载（哨兵离开/进入视口反复触发）
+  useEffect(() => {
+    const el = sentinelRef.current;
+    if (tab !== "fus" || !el || visible >= fusKeys.length) return;
+    const io = new IntersectionObserver(
+      (entries) => {
+        if (entries.some((e) => e.isIntersecting)) {
+          setVisible((v) => Math.min(v + CHUNK, fusKeys.length));
+        }
+      },
+      { root: scrollRef.current, rootMargin: "240px" }
+    );
+    io.observe(el);
+    return () => io.disconnect();
+  }, [tab, visible, fusKeys.length]);
+
+  const pick = (k: string) => {
+    setRecent(pushRecentKey(k));
+    onPick(k);
+  };
+
+  return (
+    <div className="j13-emoji-picker">
+      <div className="j13-emoji-tabs" role="tablist" aria-label="表情类型">
+        <button
+          type="button"
+          role="tab"
+          aria-selected={tab === "tos"}
+          className={tab === "tos" ? "is-on" : ""}
+          onClick={() => setTab("tos")}
+        >
+          默认
+        </button>
+        <button
+          type="button"
+          role="tab"
+          aria-selected={tab === "fus"}
+          className={tab === "fus" ? "is-on" : ""}
+          onClick={() => setTab("fus")}
+        >
+          合成
+        </button>
+      </div>
+      <div className="j13-emoji-scroll" ref={scrollRef}>
+        {recent.length > 0 && (
+          <div className="j13-emoji-group" aria-label="最近使用">
+            <div className="j13-emoji-group-label">最近</div>
+            <div className="j13-emoji-grid">
+              {recent.map((k) => (
+                <EmojiCell key={k} k={k} onPick={pick} />
+              ))}
+            </div>
+          </div>
+        )}
+        {tab === "tos"
+          ? DY_EMOJI_GROUPS.map((g) => (
+              <div className="j13-emoji-group" key={g.label}>
+                <div className="j13-emoji-group-label">{g.label}</div>
+                <div className="j13-emoji-grid">
+                  {g.keys.map((k) => (
+                    <EmojiCell key={k} k={k} onPick={pick} />
+                  ))}
+                </div>
+              </div>
+            ))
+          : (
+            <div className="j13-emoji-group">
+              <div className="j13-emoji-group-label">合成</div>
+              <div className="j13-emoji-grid">
+                {fusKeys.slice(0, visible).map((k) => (
+                  <EmojiCell key={k} k={k} onPick={pick} />
+                ))}
+                {fusKeys.length > visible && <div ref={sentinelRef} aria-hidden />}
+              </div>
+            </div>
+          )}
+        {tab === "fus" && !manifest && !failed && <p className="j13-emoji-empty meta">表情加载中…</p>}
+        {tab === "fus" && !manifest && failed && <p className="j13-emoji-empty meta">表情加载失败</p>}
+        {manifest && tab === "fus" && fusKeys.length === 0 && (
+          <p className="j13-emoji-empty meta">暂无表情</p>
+        )}
+      </div>
+    </div>
+  );
+}

frontend/components/MarkdownBody.tsx

@@ -2,6 +2,7 @@ import type { ReactNode } from "react";
 import type { Components } from "react-markdown";
 import { renderMarkdownToReact } from "@/components/markdown/renderMarkdown";
 import { splitContentSegments } from "@/lib/directiveBlocks";
+import { expandDyEmojiShortcodes } from "@/lib/dyEmoji";
 import type { HideKind } from "@/lib/hideBlocks";
 import MdHideBlock from "@/components/markdown/MdHideBlock";
 import MdTimeline from "@/components/markdown/MdTimeline";
@@ -28,7 +29,7 @@ export default async function MarkdownBody({
   loginHref,
   loggedIn = false,
 }: MarkdownBodyProps) {
-  const segs = splitContentSegments(content || "");
+  const segs = splitContentSegments(expandDyEmojiShortcodes(content || ""));
   const nodes = [];
   for (let i = 0; i < segs.length; i++) {
     const seg = segs[i];
@@ -48,7 +49,7 @@ export default async function MarkdownBody({
           continue;
         }
         // 条目正文不挂目录 id，避免与块外 headingRenderer 错位
-        bodies.push(await renderMarkdownToReact(it.body));
+        bodies.push(await renderMarkdownToReact(expandDyEmojiShortcodes(it.body)));
       }
       nodes.push(
         <MdTimeline
@@ -75,7 +76,7 @@ export default async function MarkdownBody({
       continue;
     }
     const inner = seg.body.trim()
-      ? await renderMarkdownToReact(seg.body)
+      ? await renderMarkdownToReact(expandDyEmojiShortcodes(seg.body))
       : null;
     nodes.push(
       <MdHideBlock key={`hide-${i}`} kind={kind} points={seg.points}>

frontend/components/MarkdownBodyClient.tsx

@@ -4,6 +4,7 @@ import ReactMarkdown, { type Components } from "react-markdown";
 import remarkGfm from "remark-gfm";
 import { mergeMarkdownComponents } from "@/components/markdown/mergeComponents";
 import { splitContentSegments } from "@/lib/directiveBlocks";
+import { expandDyEmojiShortcodes } from "@/lib/dyEmoji";
 import type { HideKind } from "@/lib/hideBlocks";
 import MdHideBlock from "@/components/markdown/MdHideBlock";
 import MdTimeline from "@/components/markdown/MdTimeline";
@@ -28,7 +29,7 @@ export default function MarkdownBodyClient({
   loginHref,
   loggedIn = false,
 }: MarkdownBodyClientProps) {
-  const segs = splitContentSegments(content || "");
+  const segs = splitContentSegments(expandDyEmojiShortcodes(content || ""));
   const mdComponents = mergeMarkdownComponents(components);
   // 时间线/隐藏块正文不套外层 heading 覆盖，避免预览与正文目录 id 错位
   const nestedMd = mergeMarkdownComponents();
@@ -52,7 +53,7 @@ export default function MarkdownBodyClient({
               renderBody={(it) =>
                 it.body.trim() ? (
                   <ReactMarkdown remarkPlugins={[remarkGfm]} components={nestedMd}>
-                    {it.body}
+                    {expandDyEmojiShortcodes(it.body)}
                   </ReactMarkdown>
                 ) : null
               }
@@ -77,7 +78,7 @@ export default function MarkdownBodyClient({
           <MdHideBlock key={`hide-${i}`} kind={kind} points={seg.points}>
             {seg.body.trim() ? (
               <ReactMarkdown remarkPlugins={[remarkGfm]} components={nestedMd}>
-                {seg.body}
+                {expandDyEmojiShortcodes(seg.body)}
               </ReactMarkdown>
             ) : null}
           </MdHideBlock>

frontend/components/MarkdownEditor.tsx

@@ -32,12 +32,14 @@ import {
   ChevronDown,
   History,
   Ellipsis,
+  Smile,
 } from "lucide-react";
 import { apiSearchPosts, apiUploadPostImage, type PostListItem } from "@/lib/api";
 import { toast } from "@/lib/toast";
 import MarkdownBodyClient from "@/components/MarkdownBodyClient";
 import ImageInsertModal from "@/components/ImageInsertModal";
 import TimelineEditor from "@/components/TimelineEditor";
+import EmojiPicker from "@/components/EmojiPicker";
 import { resolveTimelineBlockForEdit } from "@/lib/directiveBlocks";
 import { SHIKI_LANG_IDS } from "@/components/markdown/shikiHighlighter";
 import { postPath } from "@/lib/urlStyle";
@@ -88,7 +90,7 @@ type WrapOpts = {
   linePrefix?: string;
 };
 
-type PopoverKind = "link" | "code" | "hide" | "heading" | "more" | null;
+type PopoverKind = "link" | "code" | "hide" | "heading" | "more" | "emoji" | null;
 
 const CODE_LANGS = ["plaintext", "aardio", ...SHIKI_LANG_IDS.filter((l) => l !== "plaintext")] as const;
 
@@ -412,6 +414,36 @@ export default function MarkdownEditor({
     [value, onChange]
   );
 
+  /** 行内插入（无换行 padding）：表情等短代码用 */
+  const insertInline = useCallback(
+    (text: string) => {
+      const el = taRef.current;
+      if (!el) {
+        onChange(value + text);
+        return;
+      }
+      const start = savedSel.current?.start ?? el.selectionStart;
+      const end = savedSel.current?.end ?? el.selectionEnd;
+      const next = value.slice(0, start) + text + value.slice(end);
+      onChange(next);
+      requestAnimationFrame(() => {
+        el.focus();
+        const caret = start + text.length;
+        el.setSelectionRange(caret, caret);
+      });
+      savedSel.current = null;
+    },
+    [value, onChange]
+  );
+
+  const pickEmoji = useCallback(
+    (key: string) => {
+      insertInline(`[:${key}:]`);
+      setPopover(null);
+    },
+    [insertInline]
+  );
+
   const uploadImageFile = async (file: File | null) => {
     if (!file || disabled) return;
     retryFile.current = file;
@@ -976,6 +1008,19 @@ export default function MarkdownEditor({
               </div>
             )}
           </div>
+          <div className="j13-md-popover-anchor relative">
+            <ToolBtn
+              label="表情"
+              icon={<Smile size={15} />}
+              active={popover === "emoji"}
+              onClick={() => openPopover("emoji")}
+            />
+            {popover === "emoji" && (
+              <div className="j13-md-popover j13-md-emoji-popover" role="dialog" aria-label="插入表情">
+                <EmojiPicker onPick={pickEmoji} />
+              </div>
+            )}
+          </div>
           <div className="j13-md-popover-anchor relative">
             <ToolBtn
               label={uploading ? "上传中…" : "图片"}

frontend/components/markdown/MdImage.tsx

@@ -42,6 +42,29 @@ export default function MdImage({ src, alt, title, className, ...rest }: MdImage
   const provided = (typeof alt === "string" ? alt.trim() : "") || (typeof title === "string" ? title.trim() : "");
   const imgAlt = provided || "图片";
 
+  // 抖音表情（/emoji/ 路径）：行内小图，不进图箱、不带 caption；
+  // alt 由 expandDyEmojiShortcodes 产出（"dy:<key>"），悬停 title 显示其短代码
+  const isEmoji = typeof src === "string" && src.includes("/emoji/");
+  const emojiSc =
+    typeof alt === "string" && alt.startsWith("dy:") ? `[:${alt.slice(3)}:]` : undefined;
+  if (isEmoji && !broken) {
+    return (
+      /* eslint-disable-next-line @next/next/no-img-element */
+      <img
+        {...rest}
+        src={src}
+        alt={imgAlt}
+        title={emojiSc}
+        className={`j13-md-emoji${className ? ` ${className}` : ""}`}
+        loading="lazy"
+        decoding="async"
+        draggable={false}
+        onContextMenu={(e) => e.preventDefault()}
+        onError={() => setBroken(true)}
+      />
+    );
+  }
+
   if (!src || broken) {
     return (
       <span className="md-img-fallback" role="img" aria-label={provided || "图片加载失败"}>

frontend/lib/dyEmoji.test.ts

@@ -0,0 +1,100 @@
+import assert from "node:assert/strict";
+import { describe, it } from "node:test";
+import { readFileSync } from "node:fs";
+import { fileURLToPath } from "node:url";
+import {
+  DY_EMOJI_ALIASES,
+  DY_EMOJI_GROUPS,
+  DY_EMOJI_RE,
+  dyEmojiFileKey,
+  dyEmojiUrl,
+  expandDyEmojiShortcodes,
+} from "./dyEmoji.ts";
+
+const CAT_HASH = DY_EMOJI_ALIASES["猫猫"];
+
+describe("DY_EMOJI_ALIASES", () => {
+  it("中文语义名 → hash 文件名，文件名全局唯一", () => {
+    assert.match(CAT_HASH, /^[A-Za-z0-9_-]+$/);
+    const files = Object.values(DY_EMOJI_ALIASES);
+    assert.equal(new Set(files).size, files.length);
+  });
+  it("完整覆盖 manifest.tos（集合一致；面板分组顺序独立于 manifest）", () => {
+    const manifest = JSON.parse(
+      readFileSync(fileURLToPath(new URL("../public/emoji/dy/manifest.json", import.meta.url)), "utf8")
+    );
+    assert.deepEqual(Object.values(DY_EMOJI_ALIASES).sort(), [...manifest.tos].sort());
+  });
+});
+
+describe("DY_EMOJI_GROUPS", () => {
+  it("分组 keys 无重复", () => {
+    const all = DY_EMOJI_GROUPS.flatMap((g) => g.keys);
+    assert.equal(new Set(all).size, all.length);
+  });
+  it("分组 keys 恰好覆盖全部中文语义名（不多不少）", () => {
+    const grouped = DY_EMOJI_GROUPS.flatMap((g) => g.keys).sort();
+    const allKeys = Object.keys(DY_EMOJI_ALIASES).sort();
+    assert.deepEqual(grouped, allKeys);
+  });
+});
+
+describe("dyEmojiFileKey / dyEmojiUrl", () => {
+  it("中文 key 解析为实际文件名，合成表情组合名透传", () => {
+    assert.equal(dyEmojiFileKey("猫猫"), CAT_HASH);
+    assert.equal(dyEmojiFileKey("001--002--heart"), "001--002--heart");
+  });
+  it("拼接扁平目录 URL", () => {
+    assert.equal(dyEmojiUrl("猫猫"), `/emoji/dy/${CAT_HASH}.png`);
+    assert.equal(dyEmojiUrl("001--002--heart"), "/emoji/dy/001--002--heart.png");
+  });
+  it("未知 key 原样 URL 编码透传", () => {
+    assert.equal(dyEmojiUrl("不存在"), `/emoji/dy/${encodeURIComponent("不存在")}.png`);
+  });
+});
+
+describe("expandDyEmojiShortcodes", () => {
+  it("中文短代码替换为 markdown 图片", () => {
+    assert.equal(
+      expandDyEmojiShortcodes("你好[:猫猫:]!"),
+      `你好![dy:猫猫](/emoji/dy/${CAT_HASH}.png)!`
+    );
+  });
+  it("合成表情组合名短代码", () => {
+    assert.equal(
+      expandDyEmojiShortcodes("[:001--002--heart:]"),
+      "![dy:001--002--heart](/emoji/dy/001--002--heart.png)"
+    );
+  });
+  it("多次替换且共享前缀", () => {
+    assert.equal(
+      expandDyEmojiShortcodes("[:猫猫:][:aa:][:猫猫:]"),
+      `![dy:猫猫](/emoji/dy/${CAT_HASH}.png)![dy:aa](/emoji/dy/aa.png)![dy:猫猫](/emoji/dy/${CAT_HASH}.png)`
+    );
+  });
+  it("无短代码时原样返回", () => {
+    const s = "普通文本 [a:] :x: [[y]]";
+    assert.equal(expandDyEmojiShortcodes(s), s);
+    assert.equal(expandDyEmojiShortcodes(""), "");
+  });
+  it("非法 key 不匹配（含 . / 空 / @ / 空白）", () => {
+    assert.equal(expandDyEmojiShortcodes("[:a.b:][:]"), "[:a.b:][:]");
+    assert.equal(expandDyEmojiShortcodes("[:空 格:]"), "[:空 格:]");
+    assert.equal(expandDyEmojiShortcodes("[:@x:]"), "[:@x:]");
+  });
+  it("跨行文本", () => {
+    assert.equal(
+      expandDyEmojiShortcodes("第一行[:猫猫:]\n第二行"),
+      `第一行![dy:猫猫](/emoji/dy/${CAT_HASH}.png)\n第二行`
+    );
+  });
+  it("连续使用共享同一正则（lastIndex 复用安全）", () => {
+    assert.equal(expandDyEmojiShortcodes("[:猫猫:]"), `![dy:猫猫](/emoji/dy/${CAT_HASH}.png)`);
+    assert.equal(expandDyEmojiShortcodes("[:b:]"), "![dy:b](/emoji/dy/b.png)");
+    assert.equal(expandDyEmojiShortcodes("纯文本"), "纯文本");
+    assert.equal(expandDyEmojiShortcodes("[:c:]"), "![dy:c](/emoji/dy/c.png)");
+  });
+  it("正则含 g 标志（供分段渲染使用）", () => {
+    assert.ok(DY_EMOJI_RE.global);
+  });
+});

frontend/lib/dyEmoji.ts

@@ -0,0 +1,341 @@
+/**
+ * 抖音表情共享逻辑：短代码正则 / URL / 展开为 markdown 图片 / span 收集。
+ * 纯逻辑模块（无 React 依赖），服务端与客户端组件均可安全引入。
+ */
+
+/**
+ * 抖音表情短代码：[:key:]。key 有两种形态：
+ * - 默认表情：中文语义名（如 猫猫），经 DY_EMOJI_ALIASES 映射到实际文件
+ * - 合成表情：组合文件名（fus），原样透传
+ * 字符集排除 [ ] : 空白 . @（. 防止误吞文件扩展名写法；@ 保证与 @提及 span 不重叠）
+ */
+export const DY_EMOJI_RE = /\[:([^\[\]:\n\s.@]+):\]/g;
+
+export const DY_EMOJI_BASE = "/emoji/dy";
+
+/**
+ * 默认表情语义别名（人工看图命名），顺序与 manifest.json 的 tos 一致。
+ * 面板「默认」tab 与消息内容均以中文短代码为准；更新表情资产时需同步维护本表。
+ * 用有序数组做单一数据源：对象键会把整数型 key（如 "666"）重排到最前，不能依赖键顺序。
+ */
+const DY_EMOJI_ALIAS_PAIRS: readonly (readonly [string, string])[] = [
+  ["猫猫", "003d8daaa58e4a2fb324bcd3baf4c785"],
+  ["大哭", "0043de2fff65408ab7522538f7b3292a"],
+  ["晕", "01ccc692f9094a0f9839706665c7e8bb"],
+  ["炸弹", "02a91594d67e462faf7c77e827a16eec"],
+  ["禁止", "02fcc587c8b4499080e0c03994967511"],
+  ["5V5", "032007fd6c254a72a162d8c5bf78d512"],
+  ["坏笑", "0431a35382c641679fe74f690241b533"],
+  ["纸飞机", "0636e634f58f4410a8b22675d36f52a9"],
+  ["玫瑰", "06abb0913446422cbac6ab18ea8fa44a"],
+  ["翻白眼", "06df57cc81954ef8bf65dad06a01a69a"],
+  ["无语", "072caed2f2bd4ed5ba35142965845d85"],
+  ["摸头", "0795718a5fe247b19ff80b064d02c66d"],
+  ["礼物", "08d888562e1f4ea086fc4f3eff2ef517"],
+  ["火苗", "094c1f852c2343658b2677023755249b"],
+  ["嘟嘴", "0e13c8681abe4239b3d468635b723d40"],
+  ["心碎", "0eb6e5cde36346289150a83a118bfa62"],
+  ["精选", "1482ac09926b45a1bab8f1dc98a68d22"],
+  ["笑哭", "167a2c32c7874da889fc902f8cf4500a"],
+  ["不屑", "1691cd385ecd4fb6b888d000900d74bc"],
+  ["鞭炮", "16c850aade5b475fa83b67e0266f0222"],
+  ["庆祝", "18d02bf442484371bb918e1f07c43a05"],
+  ["粽子", "1e8aef1795db468682f8b63521834f39"],
+  ["酷哭", "1eabd1db85dd4bddbbd842abe9cdce49"],
+  ["大喊", "1ec163608a2a49ffbbc766e505885bb1"],
+  ["怒", "1edc3de7713647c2b269f7f48b494b2d"],
+  ["发奋", "1f71ffdc4df041ac836cdc81940f68ff"],
+  ["OK", "21b1e1cdd15742e9aacc6cfd764260cc"],
+  ["气球", "24a048472a4c429c8d01d0401e846285"],
+  ["抱抱", "24b237f43dee47c5a068bf4457b97145"],
+  ["生气", "2609e5a35a3f436084bd618ef819227f"],
+  ["卖萌", "2618a9c1f9424c78aaf7e6174f0242b4"],
+  ["尴尬", "28d74529207c43178cc72cba847daf12"],
+  ["得意", "29288834d417481f97eb63fee5c30b53"],
+  ["凋谢", "2b7cfe4c3c524b709bd3f15537c06911"],
+  ["大笑", "2d1fca45aceb46b8b3a8d55084977851"],
+  ["太阳", "2fb7d94d6e7642349793def00e5b3e0c"],
+  ["彩带", "30d222de7c4a42cdb6d7a9ea7bea162b"],
+  ["睡觉", "30d9ccb7e4ae4a43997e76fbabd6b5cd"],
+  ["奸笑", "3139a081129f4832a70da8d7808114fa"],
+  ["OK手", "317a9b7fe5f94023a8b2987173708362"],
+  ["露齿笑", "33745171e4a544ad913b52ebb6b46b60"],
+  ["捂脸笑", "3545637c30284f6bb732a444f91196ab"],
+  ["吐舌", "365405db173b45978ea6a45bd47e9d87"],
+  ["手枪", "3b366738018343ae9831a79fa17b3dae"],
+  ["惊恐", "3c8520db7cbd418f95aea788ee6a7cf0"],
+  ["舔屏", "3d13332de5da45498cd1ef193cc4afff"],
+  ["捂脸", "3df5f3ca07e546b697b301ab9e2e3c23"],
+  ["难受", "3e8a89ca5dc74cb88b4000551a1312a7"],
+  ["眯眼", "4201288b0e1b47b59f9f031a53c3d687"],
+  ["嘿嘿", "42fd189ab7ad4f478f220d34046916fb"],
+  ["亲亲", "434e5830fe874fdca427b0d8b23a751d"],
+  ["花痴", "4364693f63a34e2999c54cbbc75df4e9"],
+  ["眨眼", "44ddc9a6bcd9471a858a33c382f6fafa"],
+  ["鸡腿", "45a1632fd059454b91c71d8d54e46a1b"],
+  ["小蓝", "45f8ce9a22b0466fbcd1bb2a841d2225"],
+  ["愤怒", "476e92daceb14bee99e36b8f50a40e81"],
+  ["祈祷", "478afb0911604f5289d9cbfd4183b404"],
+  ["贱笑", "47eb8964fef7479c80a1088f405beb43"],
+  ["汗", "47fe86652a1b4cf288de5f929cba5d80"],
+  ["擦汗", "49b5a54103ae43b0b02a564a3feec5a8"],
+  ["思考", "49bb5e7832d644dd99f50d3b6733a4c6"],
+  ["咖啡", "4b5f538005d148248338d97c47e20f9e"],
+  ["晕圈", "4c0f3ba463734e50981103650f440be0"],
+  ["点赞", "4c4a175aaf2b4e0c98b8d46684d64564"],
+  ["可怜", "4cd68b81179d421ebaf2c4e36b3630c6"],
+  ["开心", "4ec5e9c2001249b79bf4ff0c6a431cae"],
+  ["圣诞帽", "4f1aeeedf61a4051aaf0bc96a6ead49f"],
+  ["爱心眼", "4f6a86e4bfd14f8c8434f6d643782a41"],
+  ["碰拳", "4f815c8c1795412cbb67233685d785a1"],
+  ["冒烟", "517f7385630e4641af73c3ea93e44c7d"],
+  ["委屈", "52aeca47432745729c08609d46211ed1"],
+  ["指左", "54994d1e88d94722a71960508a8e9ce6"],
+  ["二哈", "54afb78ebf6a45a09c6dc7d77fc3d3fb"],
+  ["加油", "54e9a10981a242dba426a4f63d4103ab"],
+  ["疑问", "55656c6385754a35acce9f807c4afa32"],
+  ["惊呆", "55c305ac8ebe4f2a8e5fed639f188614"],
+  ["笑泪", "590d12b8677d4738ad9e989ea0280f81"],
+  ["绝", "5aaaff01fd1f493a82821b1a3943bf68"],
+  ["香蕉", "5b0b93a490394665bed2a52ae67a2975"],
+  ["福", "5cdc7b1819c3484db61fa60eeb989e2e"],
+  ["捧腹", "5d7d5f3c3f9548679fb73090a69f538a"],
+  ["红包", "5defde4959044aaeae628e060e82043f"],
+  ["猫震惊", "5faa8e1516204480b74b6f6a3122d578"],
+  ["呆", "600e9cfaf3a14174b451e2206baf1e0f"],
+  ["柴犬", "603e30989b05474788e3709d7eebd4ef"],
+  ["666", "61267a18cbf847b3af73190bc52ae36a"],
+  ["握手", "613459694fa24ae689aa306fd07944f8"],
+  ["吐", "616147770ba044a3abed4224c46fe605"],
+  ["惊讶", "622ddf449a5d4ac6a0e15445356cfb94"],
+  ["套头", "626ec790acdf4c10b5309a99ae75ecb1"],
+  ["嫌弃", "62d34256ab7845709616c5a7bf42aee1"],
+  ["给力", "63b22c1e04f34e8a8816ba2b8ac46ae3"],
+  ["斜眼", "6572851608ba4ab3acc0f0c879594d1b"],
+  ["星星脸", "66fb1287c3f04b4bbb427a1368d12a22"],
+  ["蓝怪", "6b280673ae0740e78d82178ee018a811"],
+  ["猪猪", "6c3589f8daec4143bd9b9d9b41e802ec"],
+  ["点踩", "6c80753d816442718d2f5ca44e1eb13a"],
+  ["关注我", "6ed70f4a306a48bcbc12a138165fb09d"],
+  ["巧克力", "71e20043b5f34b03b7dd85afb69f0503"],
+  ["调皮", "72045b3ac8654458a94767f463804c82"],
+  ["红心", "740e29f4ca6547ccb4f7cf3fe0463629"],
+  ["泪喷", "770948b40fe14c51a73e18dff5a8d29c"],
+  ["红唇", "77a76f873a1f4e6ba5eeff343391b213"],
+  ["怪笑", "77e480a1a9234d94bfcab3429f5f96bb"],
+  ["钻戒", "7d2da9bea4f0477aa530340355fda832"],
+  ["崩溃", "7e606e0d73d843a2bc1c15219a1318cd"],
+  ["绿帽", "7e79587db89a4404a0ebcf4aabba3d2d"],
+  ["圣诞树", "8260b9fef99e430aa08ff9259355e907"],
+  ["敲打", "831ef27451104b0e9eb89660c3d7b716"],
+  ["龇牙", "86d772fc25a0404090613bad4a123947"],
+  ["扎心", "8a054c74604844498fa9c4ae809f1c79"],
+  ["爱心枪", "8a7a9fb41d444aa68dd5568ba72040aa"],
+  ["心动", "8bb95fd220bf4efeb44c9b3e6c63afdf"],
+  ["墨镜笑", "8cd39208016c428ca80d3468e24edb0a"],
+  ["贴贴", "8dcb4606e9f14613a3bbf98a1646e56f"],
+  ["微笑", "907e61eb04e54074a101b43035d50145"],
+  ["挨揍", "91656d99d6d645a5995187454e3293f4"],
+  ["耳机", "91aa9af22f664ba08ca3c66184f2a838"],
+  ["打响指", "94266b5d083d45afb4309ed6ed905dd6"],
+  ["转眼", "94c011b83a3e40cbbcfeb09c6adb2b43"],
+  ["狂笑", "9501220f825547d699c8409184846166"],
+  ["麻将", "956e469de272416ebeb0aafd780bd78e"],
+  ["雪花", "98c4f361b8cc49e2aeff0b546664af42"],
+  ["飞吻", "9a0887a55ff94cbbbadbbbdb14c7396a"],
+  ["指右", "9a35f66a62804e90b31455ab6f0d99ee"],
+  ["沉思", "9e2b0289cd994a91a77676265d5ab7a7"],
+  ["裂开", "9eb467c1c4d849f39b45ad4e7beff0ce"],
+  ["烟花", "9ebf943dbb974a5e8dd13e5a339cff18"],
+  ["仓鼠", "9ff343dc38e54a9f98e7fa896dd95715"],
+  ["揉脸", "a3d1ce9301c5410d88cc2470a3e11c30"],
+  ["鼓掌", "a4d28f23c10e4efaa979b4d119b7ade4"],
+  ["黑脸", "a4d9f336b64f4554a0790eed0f0e1a71"],
+  ["数钱", "a7a5a4db025642a392ee10d5c74e65c9"],
+  ["哇", "a90f7139a14140dbba575425193ca6c5"],
+  ["尬笑", "a993e64d05cd428e876600a75129332f"],
+  ["舒心", "ab54a06f377346f88f094fe6281103ff"],
+  ["作揖", "abf7cc107d4740e4bc1e238b770ac889"],
+  ["窃喜", "aca47d7bc40a442b933812e3f482549d"],
+  ["跌倒", "aceb3d3827574b68a40f7c7ebf1e3049"],
+  ["楚楚", "ad1d6ca9bc694b78b8b3ad816aaccf0d"],
+  ["拍脸", "ada62e0815f141cdbdc5a76e6781786d"],
+  ["击掌", "ae9cd379b8c448d5a3c3aa107c3272d8"],
+  ["香吻", "aec920e3a21444c79a79defd76a45a75"],
+  ["抓狂", "afa666d51d474fc6b2f0a10aca57c372"],
+  ["摇扇", "b1c3d09acfe84b9280a28c4190fa0056"],
+  ["doge", "b217d170f0c349fc8ea86615738a5c81"],
+  ["咋舌", "b21a518ebd8b48caab9c814e40b63115"],
+  ["咧嘴", "b341f7cdcaea452a83a78eb81b5a30b4"],
+  ["掩面", "b379ea709e484581830373adf1bce572"],
+  ["狗拳", "b485611a693d4eadadf29f5f055511f6"],
+  ["糖葫芦", "b67a198b447a45d0a36041196e26e447"],
+  ["黄瓜", "ba6c382121e94f52bb44f41b9156f447"],
+  ["脸红", "bbcb745bbb1c463089a0d40177623c9e"],
+  ["叫好", "bd1068daba564862be71631451611ba7"],
+  ["白菜狗", "bd5541fc02514e7e8aefde9b0aabc652"],
+  ["捂嘴", "bf6b3de54ab34732af82809635c704f8"],
+  ["互粉", "bfa5963893bd41519ff31c7415f6956f"],
+  ["蛋糕", "c08640142c304d76959ee198cc8a2efd"],
+  ["撇嘴", "c10ec8abb6da4adbb3388d435a980568"],
+  ["求机位", "c5c18a6bfb3d43f9a96f833f9a758d71"],
+  ["心心眼", "c6605942715f4717805101c311b41f24"],
+  ["蓝毛", "c6646c7cd6fc4f8d89f332c2d46e4597"],
+  ["元宝", "c67bf9ed7bb34e00af6ef863d6ecfdad"],
+  ["吐血", "c98569a7f04943d7a8de0c15cef36151"],
+  ["便便", "cabe6bcd9889449daa87c2df765f379e"],
+  ["鞠躬", "cb9f16ad45d84f7ca4256f20048e422a"],
+  ["苹果", "cc5884dd4b814d81a9982bbcee136e45"],
+  ["痴笑", "cca02095fe5f448ea2289ece0e2ac49f"],
+  ["哈士奇", "cce25443e61846699d1f08782fb365bb"],
+  ["猜拳", "cd619c9151a14094ab32f44f7487b980"],
+  ["棒棒糖", "cd8647d2106b48fd9142c9c41562c8f7"],
+  ["掩嘴", "cf1a3c5b317f4c0399ed39888d73abe7"],
+  ["彩虹", "cfeddc926d3846eabda23e750364e82d"],
+  ["酷脸", "d15c89c9f3364485b514d51b43b16771"],
+  ["吃橘", "d2a361001193458ab3250ab557c7ec4b"],
+  ["西瓜", "d2c0b2c0484b4bd59d6b266c5a80c199"],
+  ["躺平", "d3084c0ac6e74eae84dd39cbc26d990d"],
+  ["掩脸", "d34c2cb72f9f45a1bd21669f832b9a94"],
+  ["鬼脸", "d3cbf267d0d8426e90edfb9c75059314"],
+  ["加油牌", "d525a68955854abda1c8bdf7f62ebadb"],
+  ["出拳", "d8a316cb0427498b87e396350b83b504"],
+  ["加一", "d9840b29c0d84082b758580ff6da0281"],
+  ["吃瓜", "db6bb519e6bc4b9b819e04b05e194586"],
+  ["瞪眼", "dcaa1bb24fed447b9ef155462db2a890"],
+  ["黑球", "ddd30bbe0a194430af6bcd6fef98570f"],
+  ["狼狗", "de102f5602824afb88009091971a862d"],
+  ["猫哭", "df7b9c648eef4720962f604f1c81a77c"],
+  ["捂眼", "dfaa3f289fd54142ad6c8088ee516852"],
+  ["蹲下", "e44b432ef18e4d84844e9eb1e7d135ac"],
+  ["干笑", "e4b71ab984154f0ab1709bd88e9defda"],
+  ["不悦", "e5275fd92a234e34984044e3b2213ebc"],
+  ["捧脸", "e58ab050664b44eaa7a7c8b8d6fe9cf7"],
+  ["羞涩", "e7f9e93ae5da435884e17c57442729f1"],
+  ["盯", "e80c05fa6c4943759dba8486512901e0"],
+  ["开怀", "e9078540aac945b4992ae19dbf4d0783"],
+  ["红酒", "e959a423dd0a43fd8fcd5dd0499928cf"],
+  ["灯笼", "ea0d63f135594b82ac3e386cf684046a"],
+  ["干杯", "ea97458fd890435c9fa6df3520f66b1f"],
+  ["军帽", "eb8d8e8a04e34db082437c083539dd2f"],
+  ["禁烟花", "ebff2644a4ab4149a41f1bc7282879b1"],
+  ["减一", "efa80a6e10f04dcc8de89092744b2bf9"],
+  ["叼玫瑰", "f1d000c0d62a4d77b14641076a05f5b9"],
+  ["嚣张", "f266b481b9e14e588228016138913c75"],
+  ["拍我", "f2efb004f2f842b1bc20284bd2e010e3"],
+  ["干饭", "f68c5e1160c449508d55cbe2acc0bd47"],
+  ["德牧", "f730fe9f0bd44b59b8f0ed5069a747dc"],
+  ["糖果", "f75de5be772c458e9a5469b32c75413e"],
+  ["甜点", "f840c0bdd606425a8dd1190b80126674"],
+  ["比心", "f87a6fb3ac774f2e8f9f1760e3d2de45"],
+  ["迷恋", "fba0f99d4b8049cd905bfd076d4efbf2"],
+  ["惊呼", "fba1c2ac23394a31bc1c3405148bd363"],
+  ["郁闷", "fbbbf98a169642d386020f79d06af11c"],
+  ["含泪", "fbd4350861fe49cd991e76e82e382715"],
+  ["三文鱼", "fd24c9f2258f4640af610472b442f9ec"],
+];
+
+/**
+ * 默认表情分组：同类型相邻排列（参考抖音/飞书面板）。
+ * keys 必须恰好覆盖 DY_EMOJI_ALIAS_PAIRS 的全部中文 key 且不重复（有单测锁定）。
+ */
+export const DY_EMOJI_GROUPS: readonly { label: string; keys: string[] }[] = [
+  {
+    label: "笑脸",
+    keys: [
+      "微笑", "露齿笑", "笑哭", "笑泪", "捂脸笑", "嘿嘿", "贱笑", "奸笑", "怪笑", "痴笑",
+      "狂笑", "大笑", "捧腹", "开怀", "窃喜", "尬笑", "干笑", "咧嘴", "龇牙", "吐舌",
+      "舔屏", "星星脸", "花痴", "得意", "坏笑", "墨镜笑", "嚣张", "酷哭", "酷脸", "调皮",
+      "卖萌", "呆", "鬼脸", "脸红", "羞涩", "楚楚", "捧脸", "舒心", "开心", "精选",
+    ],
+  },
+  {
+    label: "情绪",
+    keys: [
+      "大哭", "含泪", "泪喷", "委屈", "难受", "郁闷", "不悦", "无语", "汗", "擦汗",
+      "晕", "晕圈", "崩溃", "抓狂", "怒", "生气", "愤怒", "黑脸", "尴尬", "可怜",
+      "裂开", "吐", "吐血", "嘟嘴", "撇嘴", "嫌弃", "不屑", "翻白眼", "斜眼", "哇",
+      "大喊", "惊呆", "惊讶", "惊呼", "惊恐", "瞪眼", "盯", "眨眼", "眯眼", "转眼",
+      "疑问", "思考", "沉思", "咋舌", "绝", "睡觉", "躺平",
+    ],
+  },
+  {
+    label: "手势",
+    keys: [
+      "OK", "OK手", "点赞", "点踩", "碰拳", "击掌", "出拳", "猜拳", "狗拳", "握手",
+      "作揖", "鞠躬", "祈祷", "打响指", "鼓掌", "加油", "加油牌", "发奋", "指左", "指右",
+      "摸头", "揉脸", "捂脸", "掩面", "掩脸", "掩嘴", "捂嘴", "捂眼", "拍脸", "拍我",
+      "套头", "挨揍", "跌倒", "蹲下", "抱抱",
+    ],
+  },
+  {
+    label: "爱心",
+    keys: [
+      "红心", "心碎", "爱心眼", "心心眼", "爱心枪", "心动", "比心", "迷恋", "贴贴", "亲亲",
+      "香吻", "飞吻", "红唇", "绿帽",
+    ],
+  },
+  {
+    label: "动物",
+    keys: [
+      "猫猫", "猫震惊", "猫哭", "二哈", "哈士奇", "柴犬", "白菜狗", "德牧", "狼狗", "猪猪",
+      "仓鼠", "小蓝", "蓝怪", "蓝毛", "三文鱼", "doge",
+    ],
+  },
+  {
+    label: "食物",
+    keys: [
+      "鸡腿", "咖啡", "香蕉", "苹果", "西瓜", "黄瓜", "吃瓜", "吃橘", "糖葫芦", "棒棒糖",
+      "巧克力", "蛋糕", "糖果", "甜点", "粽子", "红酒", "干饭", "干杯",
+    ],
+  },
+  {
+    label: "物品",
+    keys: [
+      "炸弹", "禁止", "手枪", "火苗", "冒烟", "太阳", "雪花", "彩虹", "气球", "纸飞机",
+      "玫瑰", "凋谢", "叼玫瑰", "礼物", "钻戒", "元宝", "红包", "数钱", "便便", "黑球",
+      "耳机", "摇扇", "麻将", "军帽", "圣诞帽", "圣诞树", "灯笼", "福", "鞭炮", "烟花",
+      "禁烟花", "彩带", "庆祝", "叫好", "求机位", "关注我", "互粉", "5V5", "666", "加一",
+      "减一", "给力", "敲打", "扎心",
+    ],
+  },
+];
+
+/** 中文语义名 → 实际文件名查找表 */
+export const DY_EMOJI_ALIASES: Record<string, string> =
+  Object.fromEntries(DY_EMOJI_ALIAS_PAIRS);
+
+/** key → 实际文件名：中文语义名查别名表，合成表情组合名原样透传 */
+export function dyEmojiFileKey(key: string): string {
+  return DY_EMOJI_ALIASES[key] ?? key;
+}
+
+export function dyEmojiUrl(key: string): string {
+  return `${DY_EMOJI_BASE}/${encodeURIComponent(dyEmojiFileKey(key))}.png`;
+}
+
+/**
+ * 把 [:key:] 短代码展开为 markdown 行内图片（供 Markdown 渲染管线）。
+ * 注意：不感知代码围栏，围栏内的短代码也会被展开（v1 已知限制）。
+ */
+export function expandDyEmojiShortcodes(text: string): string {
+  if (!text || !text.includes("[:")) return text;
+  return text.replace(DY_EMOJI_RE, (_m, key: string) => {
+    return `![dy:${key}](${dyEmojiUrl(key)})`;
+  });
+}
+
+export type DyEmojiManifest = { tos: string[]; fus: string[] };
+
+/** 收集文本中的表情短代码位置（聊天等纯文本渲染用；每次用独立正则避免 g 的 lastIndex 状态） */
+export function collectDyEmojiSpans(
+  text: string
+): { start: number; end: number; key: string }[] {
+  if (!text || !text.includes("[:")) return [];
+  const spans: { start: number; end: number; key: string }[] = [];
+  const re = new RegExp(DY_EMOJI_RE.source, "g");
+  for (let m = re.exec(text); m; m = re.exec(text)) {
+    spans.push({ start: m.index, end: m.index + m[0].length, key: m[1] });
+  }
+  return spans;
+}

frontend/package.json

@@ -7,7 +7,7 @@
     "build": "next build",
     "start": "next start -p 3000",
     "lint": "next lint",
-    "test": "node --experimental-strip-types --test lib/siteUrl.test.ts lib/jsonLd.test.ts lib/urlStyle.test.ts lib/widgetCode.test.ts lib/smartDiff.test.ts"
+    "test": "node --experimental-strip-types --test lib/siteUrl.test.ts lib/jsonLd.test.ts lib/urlStyle.test.ts lib/widgetCode.test.ts lib/smartDiff.test.ts lib/dyEmoji.test.ts"
   },
   "dependencies": {
     "hast-util-to-jsx-runtime": "^2.3.6",