fix(report): group chart cards in the existing grid and stop remounting on scroll (BUG-616, BUG-617)

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/app/globals.css

@@ -3832,31 +3832,17 @@ input:not([type="radio"]):not([type="checkbox"]):not([class^="ant-"]):not([class
   font-size: var(--type-title-sm);
   font-weight: 500;
 }
-@media (min-width: 720px) {
-  /* Charts live in the eager 摘要 lead, not only later lazy H2 sections. */
-  .personal-report-md-lead > h4.personal-report-chart-heading:has(+ .personal-report-chart-figure),
-  .personal-report-md-section > h4.personal-report-chart-heading:has(+ .personal-report-chart-figure) {
-    float: left;
-    width: 50%;
-    box-sizing: border-box;
-    padding-inline: var(--space-3);
-    margin-top: var(--space-5);
-    margin-bottom: 0;
-  }
-  .personal-report-md-lead > h4.personal-report-chart-heading + .personal-report-chart-figure,
-  .personal-report-md-section > h4.personal-report-chart-heading + .personal-report-chart-figure {
-    float: left;
-    width: 50%;
-    margin-left: -50%;
-    margin-top: var(--space-5);
-    padding-top: 2.4em;
-    box-sizing: border-box;
-    max-width: none;
-  }
-  .personal-report-md-lead > .personal-report-chart-figure + :not(h4):not(.personal-report-chart-figure),
-  .personal-report-md-section > .personal-report-chart-figure + :not(h4):not(.personal-report-chart-figure) {
-    clear: both;
-  }
+.personal-report-md-article .personal-report-chart-grid {
+  margin: var(--space-5) 0 var(--space-6);
+}
+.personal-report-md-article .personal-report-chart-card h4 {
+  margin: 0;
+  font-size: var(--type-title-sm);
+  font-weight: 500;
+}
+.personal-report-chart-card .personal-report-chart-figure {
+  max-width: none;
+  margin: var(--space-3) 0 0;
 }
 @media (max-width: 860px) {
   .personal-report-md-layout { grid-template-columns: 1fr; }
@@ -4418,23 +4404,18 @@ input:not([type="radio"]):not([type="checkbox"]):not([class^="ant-"]):not([class
   .personal-report-narrative p { font-size: 9.6pt; line-height: 1.72; orphans: 3; widows: 3; }
   .personal-report-lead-grid { grid-template-columns: minmax(0, 1.04fr) minmax(64mm, .96fr); gap: 8mm; }
   .personal-report-chart-svg { max-width: none; margin-top: 3mm; }
-  .personal-report-md-article .personal-report-chart-figure {
-    float: none;
+  .personal-report-md-article .personal-report-chart-card .personal-report-chart-figure {
+    max-width: none;
     width: auto;
-    max-width: 360px;
-    margin-left: auto;
-    margin-right: auto;
+    margin: 3mm 0 0;
     padding-top: 0;
     break-inside: avoid;
   }
-  .personal-report-md-article h4.personal-report-chart-heading {
-    float: none;
-    width: auto;
-    margin-left: auto;
-    margin-right: auto;
-    max-width: 360px;
+  .personal-report-md-article .personal-report-chart-card h4 {
+    max-width: none;
     padding-inline: 0;
   }
+  .personal-report-chart-card { break-inside: avoid; }
   .personal-report-chart-grid,
   .personal-report-chart-grid.is-single { grid-template-columns: 1fr; }
   .personal-report-chart-grid.is-single { max-width: 118mm; }

frontend/src/components/personal-report/personal-report-markdown-view.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { useEffect, useMemo, useRef, useState, type ReactNode } from "react";
+import { memo, useEffect, useMemo, useRef, useState, type ReactNode } from "react";
 import ReactMarkdown, { type Components } from "react-markdown";
 import remarkGfm from "remark-gfm";
 
@@ -10,6 +10,7 @@ import {
   parseReportChartBlock,
   toNorthIndianChart,
 } from "@/lib/report-chart-block";
+import { reportChartGrid } from "@/lib/report-chart-grid-rehype";
 import { NorthIndianChartSvg } from "@/components/personal-report/vedic-chart-svg";
 import {
   buildLongformOutline,
@@ -90,6 +91,7 @@ function renderMarkdown(markdown: string, headings: readonly LongformHeading[])
     <ReactMarkdown
       components={markdownComponents(headings)}
       disallowedElements={["script", "iframe", "object", "embed", "img"]}
+      rehypePlugins={[reportChartGrid]}
       remarkPlugins={[remarkGfm]}
       skipHtml
       unwrapDisallowed
@@ -100,7 +102,7 @@ function renderMarkdown(markdown: string, headings: readonly LongformHeading[])
   );
 }
 
-function LazyMarkdownSection({
+const LazyMarkdownSection = memo(function LazyMarkdownSection({
   section,
 }: {
   section: LongformSection;
@@ -120,21 +122,24 @@ function LazyMarkdownSection({
     observer.observe(ref.current);
     return () => observer.disconnect();
   }, [visible]);
+  const content = useMemo(
+    () => (visible ? renderMarkdown(section.markdown, section.headings) : (
+      <h2 id={section.id}>{section.title}</h2>
+    )),
+    [visible, section],
+  );
   return (
     <section ref={ref} className="personal-report-md-section">
-      {visible ? renderMarkdown(section.markdown, section.headings) : (
-        <h2 id={section.id}>{section.title}</h2>
-      )}
+      {content}
     </section>
   );
-}
+});
 
-export function PersonalReportMarkdownView({ markdown }: { markdown: string }) {
-  const outline = useMemo(() => buildLongformOutline(markdown), [markdown]);
-  const [activeId, setActiveId] = useState(outline.headings[0]?.id ?? "");
+function ReportToc({ headings }: { headings: readonly LongformHeading[] }) {
+  const [activeId, setActiveId] = useState(headings[0]?.id ?? "");
 
   useEffect(() => {
-    if (outline.headings.length === 0 || typeof IntersectionObserver === "undefined") return;
+    if (headings.length === 0 || typeof IntersectionObserver === "undefined") return;
     const observer = new IntersectionObserver((entries) => {
       const visible = entries
         .filter((entry) => entry.isIntersecting)
@@ -142,29 +147,41 @@ export function PersonalReportMarkdownView({ markdown }: { markdown: string }) {
       const id = visible[0]?.target.id;
       if (id) setActiveId(id);
     }, { rootMargin: "-20% 0px -70% 0px", threshold: [0, 1] });
-    for (const item of outline.headings) {
+    for (const item of headings) {
       const node = document.getElementById(item.id);
       if (node) observer.observe(node);
     }
     return () => observer.disconnect();
-  }, [outline.headings]);
+  }, [headings]);
+
+  return (
+    <nav aria-label="报告目录" className="personal-report-toc">
+      <details className="personal-report-toc-drawer">
+        <summary>目录</summary>
+        <TocList activeId={activeId} items={headings} />
+      </details>
+      <div className="personal-report-toc-desktop">
+        <p>目录</p>
+        <TocList activeId={activeId} items={headings} />
+      </div>
+    </nav>
+  );
+}
+
+export function PersonalReportMarkdownView({ markdown }: { markdown: string }) {
+  const outline = useMemo(() => buildLongformOutline(markdown), [markdown]);
+  const lead = useMemo(
+    () => (outline.leadMarkdown ? renderMarkdown(outline.leadMarkdown, outline.headings) : null),
+    [outline],
+  );
 
   return (
     <div className="personal-report-md-layout">
-      <nav aria-label="报告目录" className="personal-report-toc">
-        <details className="personal-report-toc-drawer">
-          <summary>目录</summary>
-          <TocList activeId={activeId} items={outline.headings} />
-        </details>
-        <div className="personal-report-toc-desktop">
-          <p>目录</p>
-          <TocList activeId={activeId} items={outline.headings} />
-        </div>
-      </nav>
+      <ReportToc headings={outline.headings} />
       <article className="personal-report-document personal-report-md-article">
-        {outline.leadMarkdown ? (
+        {lead ? (
           <section className="personal-report-md-lead">
-            {renderMarkdown(outline.leadMarkdown, outline.headings)}
+            {lead}
           </section>
         ) : null}
         {outline.sections.filter((section) => !section.eager).map((section) => (

frontend/src/lib/report-chart-grid-rehype.ts

@@ -0,0 +1,127 @@
+const CHART_HEADING_RE = /^(?:D\d{1,3}\b|Moon Chart)/;
+
+type HastProperties = {
+  className?: string | string[] | null;
+  [key: string]: unknown;
+};
+
+type HastNode = {
+  type: string;
+  tagName?: string;
+  value?: string;
+  properties?: HastProperties;
+  children?: HastNode[];
+};
+
+type HastRoot = {
+  type: "root";
+  children: HastNode[];
+};
+
+function classNames(node: HastNode | undefined): string[] {
+  const value = node?.properties?.className;
+  if (Array.isArray(value)) return value.map(String);
+  if (typeof value === "string") return value.split(/\s+/).filter(Boolean);
+  return [];
+}
+
+function hasClass(node: HastNode | undefined, name: string): boolean {
+  return classNames(node).includes(name);
+}
+
+function isWhitespace(node: HastNode | undefined): boolean {
+  return Boolean(node && node.type === "text" && !String(node.value ?? "").trim());
+}
+
+function flattenText(node: HastNode | undefined): string {
+  if (!node) return "";
+  if (node.type === "text") return String(node.value ?? "");
+  if (!Array.isArray(node.children)) return "";
+  return node.children.map(flattenText).join("");
+}
+
+function isElement(node: HastNode | undefined, tagName: string): node is HastNode {
+  return Boolean(node && node.type === "element" && node.tagName === tagName);
+}
+
+function isChartHeading(node: HastNode | undefined): boolean {
+  return isElement(node, "h4") && CHART_HEADING_RE.test(flattenText(node).trim());
+}
+
+function isChartPre(node: HastNode | undefined): boolean {
+  if (!isElement(node, "pre") || !Array.isArray(node.children)) return false;
+  const code = node.children.find((child) => isElement(child, "code"));
+  return hasClass(code, "language-jyotish-chart") || hasClass(code, "jyotish-chart");
+}
+
+function skipWhitespace(nodes: readonly HastNode[], index: number): number {
+  let cursor = index;
+  while (cursor < nodes.length && isWhitespace(nodes[cursor])) cursor += 1;
+  return cursor;
+}
+
+function element(tagName: string, className: string[], children: HastNode[]): HastNode {
+  return {
+    type: "element",
+    tagName,
+    properties: { className },
+    children,
+  };
+}
+
+function parseCard(nodes: readonly HastNode[], index: number): { card: HastNode; next: number } | null {
+  const heading = nodes[index];
+  if (!isChartHeading(heading)) return null;
+  const children: HastNode[] = [heading];
+  let cursor = skipWhitespace(nodes, index + 1);
+  if (isElement(nodes[cursor], "p")) {
+    const afterParagraph = skipWhitespace(nodes, cursor + 1);
+    if (isChartPre(nodes[afterParagraph])) {
+      children.push(nodes[cursor] as HastNode);
+      cursor = afterParagraph;
+    }
+  }
+  if (!isChartPre(nodes[cursor])) return null;
+  children.push(nodes[cursor] as HastNode);
+  return {
+    card: element("div", ["personal-report-chart-card"], children),
+    next: cursor + 1,
+  };
+}
+
+export function groupReportChartNodes(nodes: readonly HastNode[]): HastNode[] {
+  const grouped: HastNode[] = [];
+  let index = 0;
+  while (index < nodes.length) {
+    const first = parseCard(nodes, index);
+    if (!first) {
+      grouped.push(nodes[index] as HastNode);
+      index += 1;
+      continue;
+    }
+    const cards = [first.card];
+    index = first.next;
+    while (index < nodes.length) {
+      const peeked = skipWhitespace(nodes, index);
+      const next = parseCard(nodes, peeked);
+      if (!next) break;
+      cards.push(next.card);
+      index = next.next;
+    }
+    grouped.push(element(
+      "div",
+      cards.length === 1
+        ? ["personal-report-chart-grid", "is-single"]
+        : ["personal-report-chart-grid"],
+      cards,
+    ));
+  }
+  return grouped;
+}
+
+export function reportChartGrid() {
+  return function groupReportCharts(tree: HastRoot) {
+    if (tree?.type !== "root" || !Array.isArray(tree.children)) return;
+    tree.children = groupReportChartNodes(tree.children);
+  };
+}