refactor: introduce RevealManager and Article DOM context

Decouple the reveal logic from the `Article` component by introducing
a `RevealManager` component and an `ArticleDomCtx`. This allows the
reveal logic to reactively manage DOM injections and classes without
polluting the `Article` component's props or lifecycle.

Additionally, implements a robust `cleanupInjections` mechanism to
ensure that injected buttons and styling artifacts are properly removed
during navigation, role changes, or disconnections.

src/App.tsx

@@ -1,8 +1,6 @@
 import { Component, createEffect, createMemo, createSignal } from "solid-js";
 import { useLocation } from "@solidjs/router";
 import { useJournalStream } from "./components/stores/journalStream";
-import { addRevealedClasses } from "./components/stores/reveal";
-import { useJournalCompletions } from "./components/journal/completions";
 
 // 导入组件以注册自定义元素
 import "./components";
@@ -12,6 +10,7 @@ import {
   DesktopSidebar,
   DocDialog,
   DataSourceDialog,
+  RevealManager,
 } from "./components";
 import { generateToc, type FileNode, type TocNode } from "./data-loader";
 import { JournalPanel } from "./components/journal";
@@ -19,7 +18,6 @@ import { JournalPanel } from "./components/journal";
 const App: Component = () => {
   const location = useLocation();
   const stream = useJournalStream();
-  const comp = useJournalCompletions();
   const [isSidebarOpen, setIsSidebarOpen] = createSignal(false);
   const [isDocOpen, setIsDocOpen] = createSignal(false);
   const [isDataSourceOpen, setIsDataSourceOpen] = createSignal(false);
@@ -126,10 +124,9 @@ const App: Component = () => {
           <Article
             class="prose text-black prose-sm max-w-full flex-1"
             src={currentPath()}
-            onDom={(dom) =>
-              addRevealedClasses(dom, location.pathname, comp.data)
-            }
-          />
+          >
+            <RevealManager />
+          </Article>
         </main>
       </div>
       <DocDialog isOpen={isDocOpen()} onClose={() => setIsDocOpen(false)} />

src/components/Article.tsx

@@ -1,10 +1,14 @@
 import {
   Component,
+  ParentProps,
+  createContext,
+  useContext,
   createEffect,
   onCleanup,
   Show,
   createResource,
   createMemo,
+  createSignal,
 } from "solid-js";
 import { parseMarkdown } from "../markdown";
 import { extractSection } from "../data-loader";
@@ -21,7 +25,19 @@ export interface ArticleProps {
   onError?: (error: Error) => void;
   class?: string; // 额外的 class 用于样式控制
   scrollToHash?: boolean; // 是否自动滚动到 hash
-  onDom?: (dom: HTMLDivElement) => void;
+}
+
+// ---------------------------------------------------------------------------
+// Article DOM context – lets child components react to the content container
+// ---------------------------------------------------------------------------
+
+const ArticleDomCtx = createContext<() => HTMLDivElement | undefined>();
+
+/** Access the article's content DOM element from a child component. */
+export function useArticleDom(): () => HTMLDivElement | undefined {
+  const ctx = useContext(ArticleDomCtx);
+  if (!ctx) throw new Error("useArticleDom must be used inside an <Article>");
+  return ctx;
 }
 
 async function fetchArticleContent(params: {
@@ -59,13 +75,13 @@ function scrollToHash(hash: string) {
  * Article 组件
  * 用于将特定 src 位置的 md 文件显示为 markdown 文章
  */
-export const Article: Component<ArticleProps> = (props) => {
+export const Article: Component<ArticleProps & ParentProps> = (props) => {
   const location = useLocation();
   const [content, { refetch }] = createResource(
     () => ({ src: props.src, section: props.section }),
     fetchArticleContent,
   );
-  let innerDiv!: HTMLDivElement;
+  const [contentDom, setContentDom] = createSignal<HTMLDivElement>();
 
   // 解析 iconPath，默认为 "./assets"，空字符串表示禁用
   const iconPrefix = createMemo(() => {
@@ -82,8 +98,6 @@ export const Article: Component<ArticleProps> = (props) => {
 
       // 内容渲染后检查 hash 并滚动
       scrollToHash(location.hash);
-
-      props.onDom?.(innerDiv);
     }
   });
 
@@ -103,11 +117,14 @@ export const Article: Component<ArticleProps> = (props) => {
         <div class="text-red-500">加载失败：{content.error?.message}</div>
       </Show>
       <Show when={!content.loading && !content.error && content()}>
-        <div
-          class="relative"
-          ref={innerDiv}
-          innerHTML={parseMarkdown(content()!, iconPrefix())}
-        />
+        <ArticleDomCtx.Provider value={contentDom}>
+          <div
+            class="relative"
+            ref={setContentDom}
+            innerHTML={parseMarkdown(content()!, iconPrefix())}
+          />
+          {props.children}
+        </ArticleDomCtx.Provider>
       </Show>
     </article>
   );

src/components/RevealManager.tsx

@@ -0,0 +1,40 @@
+/**
+ * RevealManager — mounts as a child of <Article> and reactively applies
+ * reveal classes (non-GM) or injects action buttons (GM) whenever the
+ * content DOM, stream connection state, role, or completions change.
+ */
+
+import { Component, createEffect, onCleanup } from "solid-js";
+import { useLocation } from "@solidjs/router";
+import { useArticleDom } from "./Article";
+import { journalStreamState } from "./stores/journalStream";
+import { useJournalCompletions } from "./journal/completions";
+import { addRevealedClasses, cleanupInjections } from "./stores/reveal";
+
+export const RevealManager: Component = () => {
+  const contentDom = useArticleDom();
+  const location = useLocation();
+  const comp = useJournalCompletions();
+
+  createEffect(() => {
+    const dom = contentDom();
+    if (!dom) return;
+
+    // Access stream state reactively so the effect re-runs whenever
+    // connection status or role changes.
+    const state = journalStreamState;
+    void state.connected;
+    void state.myRole;
+
+    addRevealedClasses(dom, location.pathname, comp.data);
+  });
+
+  onCleanup(() => {
+    const dom = contentDom();
+    if (dom) cleanupInjections(dom);
+  });
+
+  return null;
+};
+
+export default RevealManager;

src/components/index.ts

@@ -16,6 +16,7 @@ import "./md-token-viewer";
 // 导出组件
 export { Article } from "./Article";
 export type { ArticleProps } from "./Article";
+export { RevealManager } from "./RevealManager";
 export { MobileSidebar, DesktopSidebar } from "./Sidebar";
 export type { SidebarProps } from "./Sidebar";
 export { FileTreeNode, HeadingNode } from "./FileTree";

src/components/stores/reveal.ts

@@ -66,6 +66,13 @@ export function setLinkPrefill(text: string | null) {
   setActionPrefill(text ? { command: "/link", text } : null);
 }
 
+// ---------------------------------------------------------------------------
+// DOM markers for injected artifacts (used by cleanup) --------------__________
+// ---------------------------------------------------------------------------
+
+const DATA_BUTTON = "data-reveal-button";
+const DATA_INJECTED = "data-reveal-injected";
+
 // ---------------------------------------------------------------------------
 // addRevealedClasses — GM injects buttons; non-GM applies revealed/concealed
 // ---------------------------------------------------------------------------
@@ -95,10 +102,19 @@ export function addRevealedClasses(
   completions: CompletionsForInject = { sparkTables: [] },
 ) {
   const state = journalStreamState;
-  if (!state.connected) return;
+  if (!state.connected) {
+    // Disconnected — scrub all artifacts so the page looks clean
+    cleanupInjections(root);
+    return;
+  }
 
   const normalized = normalizePath(path);
 
+  // Always clean up previous injections before applying new ones.
+  // This handles role changes, reconnects, and navigation without
+  // leaving stale buttons or classes behind.
+  cleanupInjections(root);
+
   // ---- GM mode: inject action buttons on headings and spark tables ----
   if (state.myRole === "gm") {
     injectActionButtons(root, normalized, completions);
@@ -114,6 +130,28 @@ export function addRevealedClasses(
   applyClasses(root, revealedSet);
 }
 
+// ---------------------------------------------------------------------------
+// Cleanup — strip all previously injected artifacts
+// ---------------------------------------------------------------------------
+
+export function cleanupInjections(root: Element): void {
+  // Remove injected buttons
+  root.querySelectorAll(`[${DATA_BUTTON}]`).forEach((el) => el.remove());
+
+  // Clean up injected classes and inline styles on headings / wrappers
+  root.querySelectorAll(`[${DATA_INJECTED}]`).forEach((el) => {
+    const htmlEl = el as HTMLElement;
+    htmlEl.classList.remove("group", "flex", "items-center");
+    htmlEl.style.position = "";
+    htmlEl.removeAttribute(DATA_INJECTED);
+  });
+
+  // Remove revealed / concealed classes from all elements
+  root
+    .querySelectorAll(".revealed, .concealed")
+    .forEach((el) => el.classList.remove("revealed", "concealed"));
+}
+
 // ---------------------------------------------------------------------------
 // Completions payload type (mirrors the completions module shape)
 // ---------------------------------------------------------------------------
@@ -144,8 +182,11 @@ function injectActionButtons(
       const headingText = el.id || el.textContent?.trim() || "";
       if (headingText) {
         const btn = createLinkButton(normalizedPath, headingText);
+        btn.setAttribute(DATA_BUTTON, "");
         el.insertBefore(btn, el.firstChild);
-        (el as HTMLElement).classList.add("group", "flex", "items-center");
+        const htmlEl = el as HTMLElement;
+        htmlEl.setAttribute(DATA_INJECTED, "");
+        htmlEl.classList.add("group", "flex", "items-center");
       }
     }
     for (const child of el.children) walk(child);
@@ -211,8 +252,10 @@ function injectSparkButtons(
 
     // Inject the spark button into the <md-table> wrapper
     const btn = createSparkButton(match.slug);
+    btn.setAttribute(DATA_BUTTON, "");
     const wrapper = el.parentElement;
     if (wrapper) {
+      wrapper.setAttribute(DATA_INJECTED, "");
       wrapper.style.position = "relative";
       wrapper.classList.add("group");
       wrapper.insertBefore(btn, wrapper.firstChild);