feat(ai): AI 消息代码块外壳与思维卡流式计时 - shiki 双主题高亮/流式光标/复制工具条, 250ms 节流 mono 秒数 (DCE 工具卡清理)

web/src/components/ai/ai-message-code-block.tsx

@@ -0,0 +1,171 @@
+import { useEffect, useRef, useState, type ReactNode } from "react";
+import { Check, Copy } from "lucide-react";
+
+type AiMessageCodeBlockProps = {
+    children?: ReactNode;
+    className?: string;
+    isStreaming?: boolean;
+};
+
+type ShikiHighlighter = Awaited<ReturnType<typeof import("shiki").createHighlighter>>;
+
+let highlighterPromise: Promise<ShikiHighlighter> | null = null;
+
+const SHIKI_LANGS = [
+    "javascript",
+    "typescript",
+    "jsx",
+    "tsx",
+    "json",
+    "html",
+    "css",
+    "scss",
+    "bash",
+    "shellscript",
+    "python",
+    "sql",
+    "markdown",
+    "yaml",
+    "diff",
+    "xml",
+    "java",
+    "go",
+    "rust",
+    "c",
+    "cpp",
+    "csharp",
+    "ruby",
+    "php",
+    "kotlin",
+    "swift",
+    "docker",
+    "text",
+] as const;
+
+/** 用户常见语言写法 → shiki 语言名；未知语言回退纯文本（无高亮但外壳不变）。 */
+const LANGUAGE_ALIASES: Record<string, string> = {
+    sh: "shellscript",
+    shell: "shellscript",
+    zsh: "shellscript",
+    js: "javascript",
+    mjs: "javascript",
+    cjs: "javascript",
+    ts: "typescript",
+    mts: "typescript",
+    py: "python",
+    yml: "yaml",
+    md: "markdown",
+    mdx: "markdown",
+    rb: "ruby",
+    rs: "rust",
+    go: "go",
+    "c++": "cpp",
+    "c#": "csharp",
+    cs: "csharp",
+    kt: "kotlin",
+    dockerfile: "docker",
+    text: "text",
+};
+
+function loadHighlighter(): Promise<ShikiHighlighter> {
+    if (!highlighterPromise) {
+        highlighterPromise = import("shiki").then(({ createHighlighter }) =>
+            createHighlighter({
+                langs: [...SHIKI_LANGS],
+                themes: ["github-light", "github-dark"],
+            }),
+        );
+    }
+    return highlighterPromise;
+}
+
+function collectText(node: ReactNode): string {
+    if (node == null || typeof node === "boolean") return "";
+    if (typeof node === "string" || typeof node === "number") return String(node);
+    if (Array.isArray(node)) return node.map(collectText).join("");
+    if (typeof node === "object" && "props" in node) {
+        return collectText((node.props as { children?: ReactNode }).children);
+    }
+    return "";
+}
+
+function detectLanguage(children: ReactNode, ownClassName?: string): string {
+    const pattern = /language-([^\s]+)/;
+    const own = typeof ownClassName === "string" ? ownClassName.match(pattern) : null;
+    if (own) return own[1];
+    const first = Array.isArray(children) ? children[0] : children;
+    if (first && typeof first === "object" && "props" in first) {
+        const className = (first.props as { className?: unknown }).className;
+        const match = typeof className === "string" ? className.match(pattern) : null;
+        if (match) return match[1];
+    }
+    return "";
+}
+
+/**
+ * 自研代码块：语言标签 + 复制按钮 + 统一圆角/边框/底色；
+ * 消息结束后用 shiki 对代码上色（懒加载，github-light/dark 双主题 CSS 变量，
+ * 由 .dark 类切换），流式期间保持单色避免逐帧闪烁。
+ */
+export function AiMessageCodeBlock({ children, className, isStreaming = false, ...props }: AiMessageCodeBlockProps) {
+    const [copied, setCopied] = useState(false);
+    const [highlightHtml, setHighlightHtml] = useState<string | null>(null);
+    const timerRef = useRef<number | undefined>(undefined);
+    const codeText = collectText(children);
+    const language = detectLanguage(children, className).toLowerCase();
+
+    useEffect(() => {
+        if (isStreaming || !codeText.trim()) {
+            setHighlightHtml(null);
+            return;
+        }
+        let cancelled = false;
+        const timer = window.setTimeout(() => {
+            void loadHighlighter()
+                .then(async (highlighter) => {
+                    if (cancelled) return;
+                    const aliased = LANGUAGE_ALIASES[language];
+                    const lang = aliased ?? ((SHIKI_LANGS as readonly string[]).includes(language) ? language : "text");
+                    const html = await highlighter.codeToHtml(codeText.trimEnd(), {
+                        lang,
+                        themes: { light: "github-light", dark: "github-dark" },
+                        defaultColor: false,
+                        cssVariablePrefix: "--shiki-",
+                    });
+                    if (!cancelled) setHighlightHtml(html);
+                })
+                .catch(() => {});
+        }, 120);
+        return () => {
+            cancelled = true;
+            window.clearTimeout(timer);
+        };
+    }, [codeText, language, isStreaming]);
+
+    const handleCopy = () => {
+        const payload = codeText.trimEnd();
+        void navigator.clipboard?.writeText(payload).catch(() => {});
+        setCopied(true);
+        window.clearTimeout(timerRef.current);
+        timerRef.current = window.setTimeout(() => setCopied(false), 1600);
+    };
+
+    return (
+        <div className="ai-message-codeblock">
+            <div className="ai-message-codeblock-header">
+                <span className="ai-message-codeblock-lang">{language || "code"}</span>
+                <button type="button" className="ai-message-codeblock-copy" aria-label={copied ? "已复制" : "复制代码"} onClick={handleCopy}>
+                    {copied ? <Check /> : <Copy />}
+                    <span>{copied ? "已复制" : "复制"}</span>
+                </button>
+            </div>
+            {highlightHtml ? (
+                <div className="ai-message-codeblock-pre" dangerouslySetInnerHTML={{ __html: highlightHtml }} />
+            ) : (
+                <pre {...props} className="ai-message-codeblock-pre">
+                    {children}
+                </pre>
+            )}
+        </div>
+    );
+}

web/src/components/ai/ai-message-markdown.tsx

@@ -1,4 +1,5 @@
 import { Streamdown, type Components } from "streamdown";
+import { AiMessageCodeBlock } from "./ai-message-code-block";
 
 import "streamdown/styles.css";
 
@@ -8,7 +9,8 @@ type AIMessageMarkdownProps = {
     className?: string;
 };
 
-const components: Components = {
+function buildComponents(isStreaming: boolean): Components {
+    return {
     h1: ({ children, ...props }) => <h2 {...props} className="ai-message-markdown-heading ai-message-markdown-heading-1">{children}</h2>,
     h2: ({ children, ...props }) => <h3 {...props} className="ai-message-markdown-heading ai-message-markdown-heading-2">{children}</h3>,
     h3: ({ children, ...props }) => <h4 {...props} className="ai-message-markdown-heading ai-message-markdown-heading-3">{children}</h4>,
@@ -18,7 +20,7 @@ const components: Components = {
     ol: ({ children, ...props }) => <ol {...props} className="ai-message-markdown-list ai-message-markdown-list-ordered">{children}</ol>,
     li: ({ children, ...props }) => <li {...props} className="ai-message-markdown-list-item">{children}</li>,
     blockquote: ({ children, ...props }) => <blockquote {...props} className="ai-message-markdown-blockquote">{children}</blockquote>,
-    pre: ({ children, ...props }) => <pre {...props} className="ai-message-markdown-pre">{children}</pre>,
+    pre: ({ children, ...props }) => <AiMessageCodeBlock isStreaming={isStreaming} {...props}>{children}</AiMessageCodeBlock>,
     code: ({ children, className, ...props }) => <code {...props} className={`ai-message-markdown-code ${className || ""}`.trim()}>{children}</code>,
     a: ({ children, ...props }) => <a {...props} className="ai-message-markdown-link" target="_blank" rel="noreferrer">{children}</a>,
     hr: (props) => <hr {...props} className="ai-message-markdown-rule" />,
@@ -26,7 +28,9 @@ const components: Components = {
     th: ({ children, ...props }) => <th {...props} className="ai-message-markdown-table-cell ai-message-markdown-table-header">{children}</th>,
     td: ({ children, ...props }) => <td {...props} className="ai-message-markdown-table-cell">{children}</td>,
     input: ({ ...props }) => <input {...props} className="ai-message-markdown-task" disabled />,
-};
+    };
+}
+
 
 export function AIMessageMarkdown({ children, isStreaming = false, className = "" }: AIMessageMarkdownProps) {
     if (!children.trim()) return null;
@@ -40,7 +44,7 @@ export function AIMessageMarkdown({ children, isStreaming = false, className = "
             parseIncompleteMarkdown
             skipHtml
             lineNumbers={false}
-            components={components}
+            components={buildComponents(isStreaming)}
         >
             {children}
         </Streamdown>

web/src/components/ai/generation-tool-card.tsx

@@ -3,7 +3,7 @@ import { ChevronDown } from "lucide-react";
 
 export type GenerationToolStatus = "running" | "completed" | "error" | "cancelled";
 
-export function GenerationToolCard({ status, isBulk = false, heading, children }: { status: GenerationToolStatus; isBulk?: boolean; heading: ReactNode; children: ReactNode }) {
+export function GenerationToolCard({ status, heading, children }: { status: GenerationToolStatus; heading: ReactNode; children: ReactNode }) {
     const [open, setOpen] = useState(true);
 
     useEffect(() => {

web/src/components/ai/message-reasoning.tsx

@@ -3,6 +3,15 @@ import { ChevronDown, Sparkles } from "lucide-react";
 
 import { AIMessageMarkdown } from "@/components/ai/ai-message-markdown";
 
+function LiveReasoningCount() {
+    const [elapsedSeconds, setElapsedSeconds] = useState(0);
+    useEffect(() => {
+        const startedAt = Date.now();
+        const timer = window.setInterval(() => setElapsedSeconds((Date.now() - startedAt) / 1000), 250);
+        return () => window.clearInterval(timer);
+    }, []);
+    return <span className="ml-0.5 font-mono text-[11px] tabular-nums opacity-80">{elapsedSeconds.toFixed(1)}s</span>;
+}
 export function MessageReasoning({ reasoning, isStreaming }: { reasoning: string; isStreaming: boolean }) {
     const [open, setOpen] = useState(isStreaming);
     const [durationSeconds, setDurationSeconds] = useState<number>();
@@ -33,7 +42,7 @@ export function MessageReasoning({ reasoning, isStreaming }: { reasoning: string
     return <div className="mb-2 text-xs text-foreground/55">
         <button type="button" className="inline-flex min-h-8 items-center gap-1.5 rounded-md px-2 transition-colors hover:bg-surface-hover hover:text-foreground" aria-expanded={open} onClick={() => setOpen((value) => !value)}>
             <Sparkles className="size-3.5" />
-            <span>{isStreaming ? "正在思考" : durationSeconds ? `已思考 ${durationSeconds} 秒` : "思考过程"}</span>
+            <span>{isStreaming ? <>正在思考<LiveReasoningCount /></> : durationSeconds ? <>已思考 <span className="font-mono tabular-nums">{durationSeconds}</span> 秒</> : "思考过程"}</span>
             <ChevronDown className={`size-3.5 transition-transform${open ? " rotate-180" : ""}`} />
         </button>
         {open ? <div className="mt-2 rounded-md bg-surface-active p-3 text-foreground/70"><AIMessageMarkdown isStreaming={isStreaming}>{reasoning}</AIMessageMarkdown></div> : null}

web/src/components/ai/working-indicator.tsx

@@ -63,17 +63,7 @@ export function WorkingDots({
  * work. Disabled under prefers-reduced-motion. Caller positions it: wrap the
  * control in a `relative` container and pass the matching border radius.
  */
-export function WorkingGlow({
+export function WorkingGlow({ active, color, radius = 0, className }: { active: boolean; color: string; radius?: number | string; className?: string }) {
-    active,
-    color,
-    radius = 0,
-    className,
-}: {
-    active: boolean;
-    color: string;
-    radius?: number | string;
-    className?: string;
-}) {
     const reducedMotion = useReducedMotion();
     if (!active || reducedMotion) return null;
     const soft = `color-mix(in srgb, ${color} 55%, transparent)`;

web/src/styles/globals.css

@@ -15264,21 +15264,79 @@ html:not(.dark) .creation-history-drawer-root {
     font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
     font-size: 0.88em;
 }
-.ai-message-markdown-pre {
+.ai-message-codeblock {
     margin: 0.8em 0;
-    padding: 0.8em 0.9em;
+    overflow: hidden;
+    border: 1px solid color-mix(in srgb, var(--foreground) 11%, transparent);
+    border-radius: var(--r-md);
+    background: color-mix(in srgb, var(--foreground) 5%, var(--background));
+}
+.ai-message-codeblock-header {
+    display: flex;
+    height: 34px;
+    align-items: center;
+    justify-content: space-between;
+    gap: var(--space-2);
+    padding: 0 var(--space-2) 0 12px;
+    border-bottom: 1px solid color-mix(in srgb, var(--foreground) 8%, transparent);
+}
+.ai-message-codeblock-lang {
+    overflow: hidden;
+    color: color-mix(in srgb, currentColor 56%, transparent);
+    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
+    font-size: var(--fs-micro);
+    font-weight: 600;
+    letter-spacing: 0.05em;
+    text-overflow: ellipsis;
+    text-transform: uppercase;
+    white-space: nowrap;
+}
+.ai-message-codeblock-copy {
+    display: inline-flex;
+    height: 24px;
+    flex: 0 0 auto;
+    align-items: center;
+    gap: 5px;
+    border: 0;
+    border-radius: 6px;
+    background: transparent;
+    padding: 0 var(--space-2);
+    color: color-mix(in srgb, currentColor 62%, transparent);
+    font: inherit;
+    font-size: var(--fs-micro);
+    transition: background-color 150ms ease, color 150ms ease;
+}
+.ai-message-codeblock-copy svg { width: 13px; height: 13px; }
+.ai-message-codeblock-copy:hover { background: color-mix(in srgb, currentColor 10%, transparent); color: inherit; }
+.ai-message-codeblock-copy:focus-visible { outline: 2px solid color-mix(in srgb, var(--primary) 60%, transparent); outline-offset: -1px; }
+.ai-message-codeblock-pre {
+    margin: 0;
+    padding: 10px 12px;
     overflow-x: auto;
-    border-radius: var(--r-sm);
+    background: transparent;
-    background: color-mix(in srgb, var(--foreground) 7%, var(--background));
     color: color-mix(in srgb, var(--foreground) 86%, transparent);
+    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
     font-size: 0.84em;
     line-height: 1.55;
+    tab-size: 2;
 }
-.ai-message-markdown-pre .ai-message-markdown-code {
+.ai-message-codeblock-pre .ai-message-markdown-code {
     padding: 0;
     background: transparent;
+    color: inherit;
     font-size: inherit;
 }
+@media (prefers-reduced-motion: reduce) {
+    .ai-message-codeblock-copy { transition: none; }
+}
+
+/* --- ai-message 代码块语法高亮（shiki 双主题 CSS 变量：--shiki-light/--shiki-dark）--- */
+.ai-message-codeblock-pre .shiki { margin: 0; padding: 0; background: transparent !important; }
+.ai-message-codeblock-pre .shiki code { font-family: inherit; font-size: inherit; color: inherit; }
+html:not(.dark) .ai-message-codeblock-pre .shiki,
+html:not(.dark) .ai-message-codeblock-pre .shiki span { color: var(--shiki-light) !important; }
+html.dark .ai-message-codeblock-pre .shiki,
+html.dark .ai-message-codeblock-pre .shiki span { color: var(--shiki-dark) !important; }
 .ai-message-markdown-link {
     color: var(--primary);
     text-decoration: underline;