fix(dashboard): name the plan on self-hosted installs instead of "--"

A self-hosted install has no /marketplace/subscriptions/current route, and
Home treated its 404 like any failed read, leaving "Your Plan" at "--" for
good. A 404 now shows the plan every account starts on. The upgrade badge
and link, which have nothing to reach there, go too, unless the hosted
upgrade dialog is loaded.

src/gui/src/UI/Dashboard/TabHome.js

@@ -487,14 +487,19 @@ const TabHome = {
      */
     async _renderPlanCard($el_window) {
         let subscription = null;
+        // A self-hosted install has no billing routes; its users have the
+        // plan every account starts on, with nothing to upgrade to (no
+        // upgrade dialog either, which only hosted Puter loads).
+        let noBilling = false;
         try {
             const resp = await fetch(
                 `${window.api_origin}/marketplace/subscriptions/current`,
                 { headers: { Authorization: `Bearer ${puter.authToken}` } },
             );
+            noBilling = resp.status === 404;
             // A refusal is not a free plan: a seat owing a password change 403s.
-            if (!resp.ok) return;
-            const data = await resp.json();
+            if (!resp.ok && !noBilling) return;
+            const data = noBilling ? null : await resp.json();
             subscription = data?.subscription ?? null;
         } catch (e) {
             console.error('Failed to load plan data:', e);
@@ -595,6 +600,11 @@ const TabHome = {
                 $el_window.find('.bento-plan-upgrade').hide();
             }
 
+            if (noBilling && typeof window.UIUpgradeAccount !== 'function') {
+                $badge.text('').removeClass('free');
+                $el_window.find('.bento-plan-upgrade').hide();
+            }
+
             $el_window
                 .find('.bento-plan-upgrade')
                 .off('click.billing')