Fix federated feed only showing remote posts

There's a mismatch parameter between Mastodon's and Pixelfed's APIs

src/pages/public.jsx

@@ -10,6 +10,7 @@ import { api } from '../utils/api';
 import { filteredItems } from '../utils/filters';
 import states from '../utils/states';
 import { saveStatus } from '../utils/states';
+import supports from '../utils/supports';
 import useTitle from '../utils/useTitle';
 
 const LIMIT = 20;
@@ -30,11 +31,14 @@ function Public({ local, columnMode, ...props }) {
   const publicIterator = useRef();
   async function fetchPublic(firstLoad) {
     if (firstLoad || !publicIterator.current) {
-      publicIterator.current = masto.v1.timelines.public.list({
+      const opts = {
         limit: LIMIT,
-        local: isLocal,
+        local: isLocal || undefined,
-        remote: !isLocal, // Pixelfed
+      };
-      });
+      if (!isLocal && supports('@pixelfed/global-feed')) {
+        opts.remote = true;
+      }
+      publicIterator.current = masto.v1.timelines.public.list(opts);
     }
     const results = await publicIterator.current.next();
     let { value } = results;

src/utils/supports.js

@@ -19,6 +19,7 @@ const platformFeatures = {
   '@mastodon/profile-private-note': notContainPixelfed,
   '@pixelfed/trending': containPixelfed,
   '@pixelfed/home-include-reblogs': containPixelfed,
+  '@pixelfed/global-feed': containPixelfed,
 };
 const supportsCache = {};