Fix account page SIGSEGV: el_meta extern arity mismatch (1-arg → 2-arg)

el_meta was declared as el_meta(attrs) in account.el but the runtime
C implementation expects el_meta(name, content). Same arity crash as
the prior el_img fix — runtime passed garbage on the stack.

src/account.el

@@ -5,7 +5,7 @@ from founding_badge import { founding_badge, founding_badge_css }
 
 extern fn el_html_doc(lang: String, head: String, body: String) -> String
 extern fn el_meta_charset(charset: String) -> String
-extern fn el_meta(attrs: String) -> String
+extern fn el_meta(name: String, content: String) -> String
 extern fn el_title(text: String) -> String
 extern fn el_link_stylesheet(href: String) -> String
 extern fn el_script_src(src: String, defer_load: Bool) -> String
@@ -965,9 +965,9 @@ fn account_dashboard_section() -> String {
 fn account_page(supabase_url: String, supabase_anon_key: String) -> String {
     let head: String =
         el_meta_charset("UTF-8") +
-        el_meta("name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"") +
+        el_meta("viewport", "width=device-width, initial-scale=1.0") +
         el_title("My Account - Neuron") +
-        el_meta("name=\"description\" content=\"Manage your Neuron account, view your plan, and access your founding member details.\"") +
+        el_meta("description", "Manage your Neuron account, view your plan, and access your founding member details.") +
         "<link rel=\"icon\" type=\"image/png\" sizes=\"16x16\" href=\"/assets/favicon-16.png\">" +
         "<link rel=\"icon\" type=\"image/png\" sizes=\"32x32\" href=\"/assets/favicon-32.png\">" +
         "<link rel=\"preconnect\" href=\"https://fonts.googleapis.com\">" +