Fix device count: show 1 for free plan, 2 for professional/founding

src/account.el

@@ -818,7 +818,7 @@ fn account_devices_card() -> String {
             el_div("class=\"device-icon\"", account_signin_svg_device()) +
             el_div(
                 "",
-                el_p("class=\"devices-count\"", "2 devices included with your plan") +
+                el_p("class=\"devices-count\" id=\"devices-count-el\"", "2 devices included with your plan") +
                 el_p("class=\"devices-sub\"", "Currently: Setup at launch")
             )
         ) +

src/js/account-dashboard.el

@@ -103,6 +103,13 @@ fn main() -> Void {
     }
     setHtml('plan-billing-note-el', billingNote);
 
+    var devicesEl = document.getElementById('devices-count-el');
+    if (devicesEl) {
+      devicesEl.textContent = (plan === 'free')
+        ? '1 device included with your plan'
+        : '2 devices included with your plan';
+    }
+
     var meta = '';
     if (createdAt) {
       var d = new Date(createdAt);