Fix account page SIGSEGV: el_img extern signature mismatch

account.el declared el_img with 1 arg (attrs only) while the runtime
implementation and all other files use 3 args (src, alt, attrs).
The arity mismatch caused the server to crash with signal 11 on every
request — TCP probe passed (bind was fine) but first HTTP hit segfaulted.

src/account.el

@@ -13,7 +13,7 @@ extern fn el_script_inline(code: String) -> String
 extern fn el_nav(attrs: String, children: String) -> String
 extern fn el_div(attrs: String, children: String) -> String
 extern fn el_a(href: String, attrs: String, children: String) -> String
-extern fn el_img(attrs: String) -> String
+extern fn el_img(src: String, alt: String, attrs: String) -> String
 extern fn el_p(attrs: String, children: String) -> String
 extern fn el_h1(attrs: String, text: String) -> String
 extern fn el_button(attrs: String, label: String) -> String
@@ -520,7 +520,7 @@ fn account_css() -> String {
 }
 
 fn account_nav() -> String {
-    let logo_img: String = el_img("src=\"/assets/brand/neuron-wordmark-on-light.png\" srcset=\"/assets/brand/neuron-wordmark-on-light@2x.png 2x\" alt=\"Neuron\" height=\"28\"")
+    let logo_img: String = el_img("/assets/brand/neuron-wordmark-on-light.png", "Neuron", "srcset=\"/assets/brand/neuron-wordmark-on-light@2x.png 2x\" height=\"28\"")
     el_nav(
         "id=\"nav\"",
         el_div(