fix: public page print (#2476)

* fix pdf-print for public pages

* fix print in dark mode

apps/client/src/features/public-space/components/docs/docs-shell.tsx

@@ -25,6 +25,8 @@ import { SearchMobileControl } from "@/features/search/components/search-control
 import styles from "./docs.module.css";
 
 const MemoizedDocsSidebarTree = React.memo(DocsSidebarTree);
+const MANTINE_COLOR_SCHEME_ATTRIBUTE = "data-mantine-color-scheme";
+const DOCS_PRINT_COLOR_SCHEME_ATTRIBUTE = "data-docs-print-color-scheme";
 
 type DocsShellProps = {
   surface: DocsSurface;
@@ -47,6 +49,45 @@ export default function DocsShell({
   );
   const [mobileTocOpen, setMobileTocOpen] = useAtom(docsMobileTocAtom);
 
+  React.useEffect(() => {
+    const root = document.documentElement;
+    let previousColorScheme: string | null = null;
+    let isPrinting = false;
+
+    const restoreColorScheme = () => {
+      if (!isPrinting) return;
+
+      if (previousColorScheme === null) {
+        root.removeAttribute(MANTINE_COLOR_SCHEME_ATTRIBUTE);
+      } else {
+        root.setAttribute(MANTINE_COLOR_SCHEME_ATTRIBUTE, previousColorScheme);
+      }
+      root.removeAttribute(DOCS_PRINT_COLOR_SCHEME_ATTRIBUTE);
+      isPrinting = false;
+    };
+
+    const useLightPrintTheme = () => {
+      if (isPrinting) return;
+
+      previousColorScheme = root.getAttribute(MANTINE_COLOR_SCHEME_ATTRIBUTE);
+      root.setAttribute(
+        DOCS_PRINT_COLOR_SCHEME_ATTRIBUTE,
+        previousColorScheme ?? "light",
+      );
+      root.setAttribute(MANTINE_COLOR_SCHEME_ATTRIBUTE, "light");
+      isPrinting = true;
+    };
+
+    window.addEventListener("beforeprint", useLightPrintTheme);
+    window.addEventListener("afterprint", restoreColorScheme);
+
+    return () => {
+      window.removeEventListener("beforeprint", useLightPrintTheme);
+      window.removeEventListener("afterprint", restoreColorScheme);
+      restoreColorScheme();
+    };
+  }, []);
+
   return (
     <DocsSurfaceProvider value={surface}>
       <div className={clsx(styles.root, "public-typography")}>

apps/client/src/features/public-space/components/docs/docs.module.css

@@ -900,3 +900,59 @@
   display: flex;
   flex-direction: column;
 }
+
+/* ---------- Print ---------- */
+
+@page public-doc {
+  background-color: #fff;
+}
+
+/* Only the article prints; the body grid collapses so it takes the page width. */
+@media print {
+  :global(html):has(.root),
+  :global(body):has(.root) {
+    page: public-doc;
+    background-color: #fff !important;
+  }
+
+  :global(html[data-docs-print-color-scheme="dark"])
+    .root.root
+    :global(.codeBlock svg) {
+    filter: invert(1) hue-rotate(180deg);
+  }
+
+  .header,
+  .sidebar,
+  .toc,
+  .articleActions,
+  .breadcrumbs,
+  .pageNav,
+  .footer {
+    display: none !important;
+  }
+
+  .root {
+    --docs-bg: #fff;
+    --docs-fg: #1f1f1f;
+    --docs-content-fg: var(--docs-fg);
+    --docs-nav-fg: #495057;
+    --docs-muted: #5f6368;
+    --docs-hover: #f1f3f5;
+    --docs-faint: #868e96;
+    --docs-border: #dee2e6;
+    --docs-header-bg: #fff;
+
+    min-height: 0;
+    background-color: #fff;
+    color: var(--docs-fg);
+  }
+
+  .body {
+    display: block;
+  }
+
+  .article {
+    max-width: none;
+    padding: 0;
+  }
+}