feat: 品牌裁剪弹窗/Markdown 行内短代码与详情视频块等

新增：
- BrandCropModal 品牌图裁剪弹窗 + cropImage 工具
- Markdown 行内短代码（inlineShortcodes + remark 插件）
- MdDetails 折叠块、MdVideo 视频块组件
- directiveBlocks/inlineShortcodes 测试

其它：
- 聊天后端（handler/service chat）调整
- Markdown 渲染链路、编辑器、全局样式与品牌相关面板更新

frontend/components/MarkdownEditor.tsx

@@ -34,6 +34,11 @@ import {
   Ellipsis,
   Smile,
   LayoutList,
+  Highlighter,
+  Keyboard,
+  Palette,
+  MonitorPlay,
+  Pipette,
 } from "lucide-react";
 import { apiSearchPosts, apiUploadPostImage, type PostListItem } from "@/lib/api";
 import { toast } from "@/lib/toast";
@@ -42,7 +47,8 @@ import ImageInsertModal from "@/components/ImageInsertModal";
 import TimelineEditor from "@/components/TimelineEditor";
 import { ENTRIES_TEMPLATE, ENTRIES_TEMPLATE_AUTO } from "@/lib/entryBlocks";
 import EmojiPicker from "@/components/EmojiPicker";
-import { resolveTimelineBlockForEdit } from "@/lib/directiveBlocks";
+import { resolveTimelineBlockForEdit, parseVideoInput } from "@/lib/directiveBlocks";
+import { isValidColorValue } from "@/lib/inlineShortcodes";
 import { SHIKI_LANG_IDS } from "@/components/markdown/shikiHighlighter";
 import { postPath } from "@/lib/urlStyle";
 import { useUrlStyle } from "@/components/SiteBrandProvider";
@@ -96,7 +102,61 @@ type WrapOpts = {
   linePrefix?: string;
 };
 
-type PopoverKind = "link" | "code" | "hide" | "heading" | "more" | "emoji" | null;
+type PopoverKind = "link" | "code" | "hide" | "heading" | "more" | "emoji" | "color" | "video" | null;
+
+/** 文字颜色弹窗预设色板（均为合法短代码颜色值） */
+const COLOR_FG_PRESETS = [
+  "#e03131", "#e8590c", "#f08c00", "#2f9e44", "#0c8599",
+  "#1971c2", "#6741d9", "#c2255c", "#1f2328", "#5f6b7a",
+];
+const COLOR_BG_PRESETS = [
+  "#fff3bf", "#ffe3e3", "#d3f9d8", "#d0ebff",
+  "#e5dbff", "#ffd8a8", "#ffff8f", "#e9ecef",
+];
+
+type HSV = { h: number; s: number; v: number };
+
+/** #rgb/#rrggbb → HSV；非 hex（如颜色名）返回 null */
+function hexToHsv(hex: string): HSV | null {
+  const m = /^#?([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$/.exec(hex.trim());
+  if (!m) return null;
+  let x = m[1];
+  if (x.length === 3) x = x.split("").map((c) => c + c).join("");
+  const r = parseInt(x.slice(0, 2), 16) / 255;
+  const g = parseInt(x.slice(2, 4), 16) / 255;
+  const b = parseInt(x.slice(4, 6), 16) / 255;
+  const max = Math.max(r, g, b);
+  const min = Math.min(r, g, b);
+  const d = max - min;
+  let h = 0;
+  if (d !== 0) {
+    if (max === r) h = ((g - b) / d) % 6;
+    else if (max === g) h = (b - r) / d + 2;
+    else h = (r - g) / d + 4;
+    h *= 60;
+    if (h < 0) h += 360;
+  }
+  return { h, s: max === 0 ? 0 : d / max, v: max };
+}
+
+/** HSV → #rrggbb */
+function hsvToHex({ h, s, v }: HSV): string {
+  const c = v * s;
+  const x = c * (1 - Math.abs(((h / 60) % 2) - 1));
+  const m = v - c;
+  let r = 0, g = 0, b = 0;
+  if (h < 60) [r, g, b] = [c, x, 0];
+  else if (h < 120) [r, g, b] = [x, c, 0];
+  else if (h < 180) [r, g, b] = [0, c, x];
+  else if (h < 240) [r, g, b] = [0, x, c];
+  else if (h < 300) [r, g, b] = [x, 0, c];
+  else [r, g, b] = [c, 0, x];
+  const to = (n: number) =>
+    Math.max(0, Math.min(255, Math.round((n + m) * 255)))
+      .toString(16)
+      .padStart(2, "0");
+  return `#${to(r)}${to(g)}${to(b)}`;
+}
 
 const CODE_LANGS = ["plaintext", "aardio", ...SHIKI_LANG_IDS.filter((l) => l !== "plaintext")] as const;
 
@@ -190,6 +250,16 @@ export default function MarkdownEditor({
   const [hidePoints, setHidePoints] = useState(10);
   const [hidePassword, setHidePassword] = useState("");
   const [hideStep, setHideStep] = useState<"menu" | "points" | "password">("menu");
+  /** 颜色弹窗：前景/背景独立选择，可同时设置；null=不设置该侧 */
+  const [colorFg, setColorFg] = useState<string | null>("#e03131");
+  const [colorBg, setColorBg] = useState<string | null>(null);
+  /** 色轮/自定义输入框的当前值（始终 #hex，供 HSV 取色器使用） */
+  const [colorFgWheel, setColorFgWheel] = useState("#e03131");
+  const [colorBgWheel, setColorBgWheel] = useState("#fff3bf");
+  /** 内联 HSV 取色器展开侧；打开期间 colorHsv 为该侧当前色 */
+  const [activeWheel, setActiveWheel] = useState<"fg" | "bg" | null>(null);
+  const [colorHsv, setColorHsv] = useState<HSV>({ h: 0, s: 1, v: 1 });
+  const [videoInput, setVideoInput] = useState("");
   const [toolNarrow, setToolNarrow] = useState(false);
   const [uploadError, setUploadError] = useState("");
   const [modKey, setModKey] = useState("Ctrl");
@@ -504,6 +574,14 @@ export default function MarkdownEditor({
       setLinkAdvanced(false);
     }
     if (kind === "code") setCodeQuery("");
+    if (kind === "color") {
+      setColorFg("#e03131");
+      setColorBg(null);
+      setColorFgWheel("#e03131");
+      setColorBgWheel("#fff3bf");
+      setActiveWheel(null);
+    }
+    if (kind === "video") setVideoInput("");
     if (kind === "hide") {
       setHideStep("menu");
       setHidePoints(10);
@@ -614,6 +692,176 @@ export default function MarkdownEditor({
     setPopover(null);
   };
 
+  /**
+   * 颜色短代码插入：前景/背景可独立或组合。
+   * 两侧都有 → [color=前景 bg=背景]…[/color]；仅一侧 → [color] / [bg]。
+   */
+  const applyColor = () => {
+    const fg = colorFg?.trim();
+    const bg = colorBg?.trim();
+    if (!fg && !bg) {
+      toast("请至少选择前景色或背景色", "error");
+      return;
+    }
+    if ((fg && !isValidColorValue(fg)) || (bg && !isValidColorValue(bg))) {
+      toast("颜色仅支持 #RGB/#RRGGBB/#RRGGBBAA 或英文颜色名", "error");
+      return;
+    }
+    restoreSel();
+    const el = taRef.current;
+    const start = el?.selectionStart ?? 0;
+    const end = el?.selectionEnd ?? 0;
+    const selected = value.slice(start, end);
+    const body = selected || "彩色文字";
+    let md: string;
+    if (fg && bg) md = `[color=${fg} bg=${bg}]${body}[/color]`;
+    else if (fg) md = `[color=${fg}]${body}[/color]`;
+    else md = `[bg=${bg}]${body}[/bg]`;
+    const next = value.slice(0, start) + md + value.slice(end);
+    onChange(next);
+    requestAnimationFrame(() => {
+      if (!el) return;
+      el.focus();
+      const caret = start + md.length;
+      el.setSelectionRange(caret, caret);
+    });
+    setPopover(null);
+  };
+
+  /** 内联 HSV 取色器开关：打开时以该侧当前 hex（或上次色轮值）初始化 */
+  const toggleColorWheel = (side: "fg" | "bg") => {
+    if (activeWheel === side) {
+      setActiveWheel(null);
+      return;
+    }
+    const wheelHex = side === "fg" ? colorFgWheel : colorBgWheel;
+    setColorHsv(hexToHsv(wheelHex) ?? { h: 0, s: 1, v: 1 });
+    setActiveWheel(side);
+  };
+
+  /** HSV 拖动 → 同步该侧 wheel hex 与选中色 */
+  const commitHsv = (next: HSV) => {
+    setColorHsv(next);
+    const hex = hsvToHex(next);
+    if (activeWheel === "fg") {
+      setColorFgWheel(hex);
+      setColorFg(hex);
+    } else if (activeWheel === "bg") {
+      setColorBgWheel(hex);
+      setColorBg(hex);
+    }
+  };
+
+  /**
+   * 饱和度/明度面板拖拽：坐标以真实渲染元素 rect 映射（pointer capture 保证移出仍跟手）。
+   * 注意：必须在同步阶段取出 currentTarget 存入 el——React 在事件派发结束后会把
+   * e.currentTarget 置空，延迟回调里再读会拿到 null 导致拖拽中断。
+   */
+  const onSvPointer = (e: React.PointerEvent<HTMLDivElement>) => {
+    e.preventDefault();
+    const el = e.currentTarget;
+    el.setPointerCapture(e.pointerId);
+    const update = (clientX: number, clientY: number) => {
+      const rect = el.getBoundingClientRect();
+      const s = Math.max(0, Math.min(1, (clientX - rect.left) / rect.width));
+      const v = 1 - Math.max(0, Math.min(1, (clientY - rect.top) / rect.height));
+      setColorHsv((prev) => {
+        const next = { ...prev, s, v };
+        const hex = hsvToHex(next);
+        if (activeWheel === "fg") {
+          setColorFgWheel(hex);
+          setColorFg(hex);
+        } else if (activeWheel === "bg") {
+          setColorBgWheel(hex);
+          setColorBg(hex);
+        }
+        return next;
+      });
+    };
+    update(e.clientX, e.clientY);
+    const onMove = (ev: PointerEvent) => update(ev.clientX, ev.clientY);
+    const cleanup = () => {
+      el.removeEventListener("pointermove", onMove);
+      el.removeEventListener("pointerup", cleanup);
+      el.removeEventListener("pointercancel", cleanup);
+    };
+    el.addEventListener("pointermove", onMove);
+    el.addEventListener("pointerup", cleanup);
+    el.addEventListener("pointercancel", cleanup);
+  };
+
+  /** 色相条拖拽（水平）；同样在同步阶段缓存元素 */
+  const onHuePointer = (e: React.PointerEvent<HTMLDivElement>) => {
+    e.preventDefault();
+    const el = e.currentTarget;
+    el.setPointerCapture(e.pointerId);
+    const update = (clientX: number) => {
+      const rect = el.getBoundingClientRect();
+      const h = Math.max(0, Math.min(360, ((clientX - rect.left) / rect.width) * 360));
+      commitHsv({ ...colorHsv, h });
+    };
+    update(e.clientX);
+    const onMove = (ev: PointerEvent) => update(ev.clientX);
+    const cleanup = () => {
+      el.removeEventListener("pointermove", onMove);
+      el.removeEventListener("pointerup", cleanup);
+      el.removeEventListener("pointercancel", cleanup);
+    };
+    el.addEventListener("pointermove", onMove);
+    el.addEventListener("pointerup", cleanup);
+    el.addEventListener("pointercancel", cleanup);
+  };
+
+  /** [bilibili]/[youtube] 整行插入：表单裸输入统一走 parseVideoInput */
+  const applyVideo = () => {
+    const parsed = parseVideoInput(videoInput);
+    if (!parsed) {
+      toast("请输入 B站 BV 号/链接 或 YouTube 视频 ID/链接", "error");
+      return;
+    }
+    restoreSel();
+    const el = taRef.current;
+    const start = el?.selectionStart ?? 0;
+    const end = el?.selectionEnd ?? 0;
+    const tag = `[${parsed.provider}]${parsed.id}[/${parsed.provider}]`;
+    const padBefore = start > 0 && value[start - 1] !== "\n" ? "\n" : "";
+    const padAfter = end < value.length && value[end] !== "\n" ? "\n" : "";
+    const inserted = padBefore + tag + padAfter;
+    const next = value.slice(0, start) + inserted + value.slice(end);
+    onChange(next);
+    requestAnimationFrame(() => {
+      if (!el) return;
+      el.focus();
+      const caret = start + inserted.length;
+      el.setSelectionRange(caret, caret);
+    });
+    setPopover(null);
+  };
+
+  /** [details 标题]…[/details] 折叠面板：包住选区或占位正文 */
+  const insertDetails = () => {
+    restoreSel();
+    const el = taRef.current;
+    const start = el?.selectionStart ?? 0;
+    const end = el?.selectionEnd ?? 0;
+    const selected = value.slice(start, end);
+    const body = selected || "折叠内容";
+    const open = "[details 点击展开]";
+    const block = `${open}\n${body}\n[/details]`;
+    const padBefore = start > 0 && value[start - 1] !== "\n" ? "\n" : "";
+    const padAfter = end < value.length && value[end] !== "\n" ? "\n" : "";
+    const inserted = padBefore + block + padAfter;
+    const next = value.slice(0, start) + inserted + value.slice(end);
+    onChange(next);
+    requestAnimationFrame(() => {
+      if (!el) return;
+      el.focus();
+      const bodyStart = start + padBefore.length + open.length + 1;
+      el.setSelectionRange(bodyStart, bodyStart + body.length);
+    });
+    setPopover(null);
+  };
+
   const openTimelineEditor = () => {
     rememberSel();
     const el = taRef.current;
@@ -923,6 +1171,164 @@ export default function MarkdownEditor({
       </div>
     ) : null;
 
+  // 文字颜色弹层：前景/背景两行独立选择，可同时设置；每行含预设、内联 HSV 取色器与自定义输入。
+  // 用普通函数调用而非 <ColorPickRow/> 组件：避免内联组件每次渲染重挂载导致输入框失焦。
+  const renderColorRow = (
+    side: "fg" | "bg",
+    label: string,
+    presets: readonly string[],
+    picked: string | null
+  ) => {
+    const setPicked = (v: string | null) =>
+      side === "fg" ? setColorFg(v) : setColorBg(v);
+    const wheelOpen = activeWheel === side;
+    return (
+      <div className="j13-md-color-row">
+        <span className="j13-md-color-row-label">{label}</span>
+        <div className="j13-md-color-row-items">
+          <button
+            type="button"
+            className={`j13-md-color-none${picked === null ? " is-active" : ""}`}
+            onClick={() => setPicked(null)}
+          >
+            无
+          </button>
+          {presets.map((c) => (
+            <button
+              key={c}
+              type="button"
+              className={`j13-md-color-dot${picked?.toLowerCase() === c.toLowerCase() ? " is-active" : ""}`}
+              style={{ background: c }}
+              data-tip={c}
+              aria-label={`使用 ${c}`}
+              onClick={() => setPicked(c)}
+            />
+          ))}
+          <button
+            type="button"
+            className={`j13-md-color-wheel${wheelOpen ? " is-active" : ""}`}
+            data-tip="自定义颜色"
+            aria-label="自定义颜色"
+            aria-expanded={wheelOpen}
+            onClick={() => toggleColorWheel(side)}
+          >
+            <Pipette size={12} />
+          </button>
+          <input
+            className="j13-md-color-hex j13-md-popover-input"
+            value={picked ?? ""}
+            placeholder="#e03131 或 tomato"
+            onChange={(e) => {
+              const v = e.target.value;
+              setPicked(v);
+              if (/^#[0-9a-fA-F]{6}$/.test(v)) {
+                if (side === "fg") setColorFgWheel(v);
+                else setColorBgWheel(v);
+                if (wheelOpen) setColorHsv(hexToHsv(v) ?? colorHsv);
+              }
+            }}
+            onKeyDown={(e) => {
+              if (e.key === "Enter") {
+                e.preventDefault();
+                applyColor();
+              }
+            }}
+          />
+        </div>
+        {wheelOpen && (
+          <div className="j13-md-hsv">
+            <div
+              className="j13-md-hsv-sv"
+              style={{
+                background: `linear-gradient(to top, #000, rgba(0,0,0,0)), linear-gradient(to right, #fff, ${hsvToHex({ h: colorHsv.h, s: 1, v: 1 })})`,
+              }}
+              onPointerDown={onSvPointer}
+            >
+              <span
+                className="j13-md-hsv-sv-thumb"
+                style={{
+                  left: `${colorHsv.s * 100}%`,
+                  top: `${(1 - colorHsv.v) * 100}%`,
+                }}
+              />
+            </div>
+            <div className="j13-md-hsv-hue" onPointerDown={onHuePointer}>
+              <span
+                className="j13-md-hsv-hue-thumb"
+                style={{ left: `${(colorHsv.h / 360) * 100}%` }}
+              />
+            </div>
+          </div>
+        )}
+      </div>
+    );
+  };
+
+  const colorPopover =
+    popover === "color" ? (
+      <div
+        className={`j13-md-popover j13-md-popover-form j13-md-color-popover${toolNarrow ? " j13-md-popover-center" : ""}`}
+        role="dialog"
+        aria-label="文字颜色"
+      >
+        <div className="j13-md-color-preview">
+          <span
+            style={{
+              color: colorFg ?? "inherit",
+              backgroundColor: colorBg ?? "transparent",
+            }}
+          >
+            Aa 示例文字
+          </span>
+        </div>
+        {renderColorRow("fg", "前景", COLOR_FG_PRESETS, colorFg)}
+        {renderColorRow("bg", "背景", COLOR_BG_PRESETS, colorBg)}
+        <div className="j13-md-popover-footer">
+          <button type="button" className="btn btn-line btn-sm" onClick={() => setPopover(null)}>
+            取消
+          </button>
+          <button type="button" className="btn btn-primary btn-sm" onClick={() => applyColor()}>
+            插入
+          </button>
+        </div>
+      </div>
+    ) : null;
+
+  // 视频嵌入弹层：裸输入统一交给 parseVideoInput 归一化
+  const videoPopover =
+    popover === "video" ? (
+      <div
+        className={`j13-md-popover j13-md-popover-form${toolNarrow ? " j13-md-popover-center" : ""}`}
+        role="dialog"
+        aria-label="插入视频"
+      >
+        <label className="j13-md-field">
+          <span>B站 / YouTube</span>
+          <input
+            autoFocus
+            value={videoInput}
+            onChange={(e) => setVideoInput(e.target.value)}
+            className="j13-md-popover-input"
+            placeholder="BV1… / 视频链接 / YouTube ID"
+            onKeyDown={(e) => {
+              if (e.key === "Enter") {
+                e.preventDefault();
+                applyVideo();
+              }
+            }}
+          />
+        </label>
+        <div className="j13-md-popover-footer">
+          <button type="button" className="btn btn-line btn-sm" onClick={() => setPopover(null)}>
+            取消
+          </button>
+          <button type="button" className="btn btn-primary btn-sm" onClick={applyVideo}>
+            插入
+          </button>
+        </div>
+      </div>
+    ) : null;
+
   const ToolBtn = ({
     label,
     icon,
@@ -981,6 +1387,31 @@ export default function MarkdownEditor({
               onClick={() => runWrap({ before: "~~", after: "~~", placeholder: "删除线" })}
             />
           )}
+          {!isComment && !toolNarrow && (
+            <ToolBtn
+              label="高亮 =="
+              icon={<Highlighter size={15} />}
+              onClick={() => runWrap({ before: "==", after: "==", placeholder: "高亮" })}
+            />
+          )}
+          {!isComment && !toolNarrow && (
+            <ToolBtn
+              label="键帽"
+              icon={<Keyboard size={15} />}
+              onClick={() => runWrap({ before: "[kbd]", after: "[/kbd]", placeholder: "Ctrl" })}
+            />
+          )}
+          {!toolNarrow && (
+            <div className="j13-md-popover-anchor relative">
+              <ToolBtn
+                label="文字颜色"
+                icon={<Palette size={15} />}
+                active={popover === "color"}
+                onClick={() => openPopover("color")}
+              />
+              {popover === "color" && colorPopover}
+            </div>
+          )}
           {!isComment && !toolNarrow && <Sep />}
           {!isComment && (
             <div className="j13-md-popover-anchor relative">
@@ -1217,6 +1648,9 @@ export default function MarkdownEditor({
                   )}
                   <button type="button" role="menuitem" className="j13-md-menu-item" onMouseDown={(e) => e.preventDefault()} onClick={() => { runWrap({ before: "*", after: "*", placeholder: "斜体" }); setPopover(null); }}>斜体</button>
                   <button type="button" role="menuitem" className="j13-md-menu-item" onMouseDown={(e) => e.preventDefault()} onClick={() => { runWrap({ before: "~~", after: "~~", placeholder: "删除线" }); setPopover(null); }}>删除线</button>
+                  <button type="button" role="menuitem" className="j13-md-menu-item" onMouseDown={(e) => e.preventDefault()} onClick={() => { runWrap({ before: "==", after: "==", placeholder: "高亮" }); setPopover(null); }}>高亮</button>
+                  <button type="button" role="menuitem" className="j13-md-menu-item" onMouseDown={(e) => e.preventDefault()} onClick={() => { runWrap({ before: "[kbd]", after: "[/kbd]", placeholder: "Ctrl" }); setPopover(null); }}>键帽</button>
+                  <button type="button" role="menuitem" className="j13-md-menu-item" onMouseDown={(e) => e.preventDefault()} onClick={() => openPopover("color")}>颜色…</button>
                   {!isComment && (
                     <button type="button" role="menuitem" className="j13-md-menu-item" onMouseDown={(e) => e.preventDefault()} onClick={() => openPopover("emoji")}>表情</button>
                   )}
@@ -1230,12 +1664,20 @@ export default function MarkdownEditor({
                   )}
                   <button type="button" role="menuitem" className="j13-md-menu-item" onMouseDown={(e) => e.preventDefault()} onClick={() => { setPopover(null); openTimelineEditor(); }}>时间线</button>
                   <button type="button" role="menuitem" className="j13-md-menu-item" onMouseDown={(e) => e.preventDefault()} onClick={() => { insertAtCursor(entriesAuto ? ENTRIES_TEMPLATE_AUTO : ENTRIES_TEMPLATE); setPopover(null); }}>条目卡</button>
+                  {!isComment && (
+                    <button type="button" role="menuitem" className="j13-md-menu-item" onMouseDown={(e) => e.preventDefault()} onClick={() => insertDetails()}>折叠面板</button>
+                  )}
+                  {!isComment && (
+                    <button type="button" role="menuitem" className="j13-md-menu-item" onMouseDown={(e) => e.preventDefault()} onClick={() => openPopover("video")}>视频…</button>
+                  )}
                   {toolNarrow && (
                     <button type="button" role="menuitem" className="j13-md-menu-item" onMouseDown={(e) => e.preventDefault()} onClick={() => { setPopover(null); toggleFullscreen(); }}>{fullscreen ? "退出全屏" : "全屏写作"}</button>
                   )}
                 </div>
               )}
               {toolNarrow && codePopover}
+              {toolNarrow && popover === "color" && colorPopover}
+              {toolNarrow && popover === "video" && videoPopover}
               {toolNarrow && popover === "emoji" && !isComment && (
                 <div className="j13-md-popover j13-md-emoji-popover j13-md-popover-center" role="dialog" aria-label="插入表情">
                   <EmojiPicker onPick={pickEmoji} />
@@ -1259,6 +1701,17 @@ export default function MarkdownEditor({
             onClick={() => insertAtCursor(entriesAuto ? ENTRIES_TEMPLATE_AUTO : ENTRIES_TEMPLATE)}
           />
           )}
+          {!isComment && !toolNarrow && (
+            <div className="j13-md-popover-anchor relative">
+              <ToolBtn
+                label="视频"
+                icon={<MonitorPlay size={15} />}
+                active={popover === "video"}
+                onClick={() => openPopover("video")}
+              />
+              {popover === "video" && videoPopover}
+            </div>
+          )}
           {allowHide && !toolNarrow ? (
             <div className="j13-md-popover-anchor relative">
               <ToolBtn