Restore proxy endpoint setting

src/SystemTab.tsx

@@ -75,7 +75,19 @@ export default function SystemTab({
             <div className="card-header">
               <h2>{text.settings.panelTitle}</h2>
             </div>
-            <div className="settings-toolbar">
+            <div className="panel-settings-grid">
+              <label className="field-group panel-settings-wide">
+                <span>{text.settings.proxyHost}</span>
+                <input
+                  value={draft.publicHost}
+                  onChange={(event) =>
+                    setDraft((current) => ({
+                      ...current,
+                      publicHost: event.target.value,
+                    }))
+                  }
+                />
+              </label>
               <label className="field-group compact-field">
                 <span>{text.common.language}</span>
                 <select