Add link on recently-departed Samachan to proposed move to SushiChan.

src/Miscellaneous/PSA.coffee

@@ -7,3 +7,13 @@ PSA =
     el = $.el 'div', {className: 'fcx-announcement'}, announcement
     $.onExists doc, '.boardBanner', (banner) ->
       $.after banner, el
+
+  site: ->
+    if location.hostname is 'samachan.org'
+      $.onExists doc, '.navbar', (navbar) ->
+        link = $.el 'a',
+          href: 'https://sushigirl.us/yakuza/res/776.html'
+          target: '_blank'
+          rel: 'noopener'
+          textContent: 'Looking for a new home? Some users are regrouping on SushiChan. (a message from 4chan X)'
+        $.add navbar, [$.el('br'), link]

src/main/Main.coffee

@@ -125,6 +125,8 @@ Main =
         for key, val of Conf
           Conf[key] = items[key] ? val
 
+        try
+          PSA.site()
         Site.init Main.initFeatures
 
   upgrade: (items) ->