Update PDF export to use localized filenames and remove extra text

Modify the API server and frontend to generate dynamic, localized PDF filenames for executive meetings, and remove descriptive text from the PDF export page.

artifacts/api-server/src/routes/executive-meetings.ts

@@ -2749,10 +2749,12 @@ router.get(
       console.error("[executive-meetings] PDF archive insert failed", err);
     }
 
+    const dayName = new Intl.DateTimeFormat(langRaw === "ar" ? "ar-SA" : "en-US", { weekday: "long" }).format(new Date(dateRaw + "T00:00:00"));
+    const pdfFileName = langRaw === "ar" ? `قائمة الاجتماعات يوم ${dayName}.pdf` : `meetings-${dayName}.pdf`;
     res.setHeader("Content-Type", "application/pdf");
     res.setHeader(
       "Content-Disposition",
-      `attachment; filename="executive-meetings-${dateRaw}.pdf"`,
+      `attachment; filename="${encodeURIComponent(pdfFileName)}"; filename*=UTF-8''${encodeURIComponent(pdfFileName)}`,
     );
     res.setHeader("Content-Length", String(pdf.byteLength));
     res.setHeader("Cache-Control", "no-store");