claude: Fix stack trace shown for Typst compilation errors

Use ErrorEx with printStack=false so users see only the Typst error
message without a confusing internal stack trace.

Fixes #13942

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

Author: gordonwoodhull

src/command/render/output-typst.ts

@@ -27,6 +27,7 @@ import {
   kVariant,
 } from "../../config/constants.ts";
 import { error, warning } from "../../deno_ral/log.ts";
+import { ErrorEx } from "../../core/lib/error.ts";
 import { Format } from "../../config/types.ts";
 import { writeFileToStdout } from "../../core/console.ts";
 import { dirAndStem, expandPath } from "../../core/path.ts";
@@ -161,11 +162,10 @@ export function typstPdfOutputRecipe(
       typstOptions,
     );
     if (!result.success) {
-      // Log the error so test framework can detect it via shouldError
       if (result.stderr) {
         error(result.stderr);
       }
-      throw new Error("Typst compilation failed");
+      throw new ErrorEx("Error", "Typst compilation failed", false, false);
     }
 
     // Validate PDF against specified standards using verapdf (if available)