Routes: Redirect unknown channel tabs to channel home page

src/invidious/routes/channels.cr

@@ -1,6 +1,12 @@
 {% skip_file if flag?(:api_only) %}
 
 module Invidious::Routes::Channels
+  # Redirection for unsupported routes ("tabs")
+  def self.redirect_home(env)
+    ucid = env.params.url["ucid"]
+    return env.redirect "/channel/#{URI.encode_www_form(ucid)}"
+  end
+
   def self.home(env)
     self.videos(env)
   end

src/invidious/routing.cr

@@ -131,7 +131,7 @@ module Invidious::Routing
 
     # Channel catch-all, to redirect future routes to the channel's home
     # NOTE: defined last in order to be processed after the other routes
-    get "/channel/:ucid/*", Routes::Channels, :home
+    get "/channel/:ucid/*", Routes::Channels, :redirect_home
 
     # /c/LinusTechTips
     get "/c/:user", Routes::Channels, :brand_redirect