Fix JSDOM CSS parsing errors (border-width issue)

JSDOM crashes on modern CSS with variables like var(--border-width,1px).
Fix by stripping all <style> tags and inline style attributes before
parsing - Readability only needs DOM structure, not CSS.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/lib/utils/extract.ts

@@ -1,5 +1,28 @@
 import { Readability } from "@mozilla/readability";
-import { JSDOM } from "jsdom";
+import { JSDOM, VirtualConsole } from "jsdom";
+
+// Create a virtual console that suppresses CSS parsing errors
+// JSDOM has issues with modern CSS (variables, etc.) that don't affect Readability
+function createVirtualConsole() {
+  const virtualConsole = new VirtualConsole();
+  virtualConsole.on("error", () => {
+    // Suppress CSS parsing errors
+  });
+  virtualConsole.on("warn", () => {
+    // Suppress warnings
+  });
+  return virtualConsole;
+}
+
+// Strip style tags and inline styles from HTML to prevent JSDOM CSS parsing errors
+// Readability doesn't need CSS - it only needs the DOM structure
+function stripStyles(html: string): string {
+  // Remove <style> tags and their contents
+  let cleaned = html.replace(/<style[^>]*>[\s\S]*?<\/style>/gi, "");
+  // Remove style attributes (but keep the rest of the tag)
+  cleaned = cleaned.replace(/\s+style\s*=\s*["'][^"']*["']/gi, "");
+  return cleaned;
+}
 
 export interface ExtractedArticle {
   title: string;
@@ -41,7 +64,11 @@ export async function extractArticle(url: string): Promise<ExtractedArticle> {
   }
 
   const html = await response.text();
-  const dom = new JSDOM(html, { url });
+  const cleanedHtml = stripStyles(html);
+  const dom = new JSDOM(cleanedHtml, {
+    url,
+    virtualConsole: createVirtualConsole(),
+  });
   const document = dom.window.document;
 
   // Extract using Readability
@@ -83,7 +110,11 @@ export async function extractFromHtml(
   url: string,
   fallbackTitle?: string
 ): Promise<ExtractedArticle> {
-  const dom = new JSDOM(html, { url });
+  const cleanedHtml = stripStyles(html);
+  const dom = new JSDOM(cleanedHtml, {
+    url,
+    virtualConsole: createVirtualConsole(),
+  });
   const document = dom.window.document;
 
   // Extract using Readability