feat: enhance torrent state scheduling and display

Signed-off-by: Qi HU <github@spcsky.com>

lang/en/lang_functions.php

@@ -335,6 +335,8 @@ $lang_functions = array
     'text_contactstaff' => 'Contact staff',
     'full_site_promotion_in_effect' => 'Full site [%s] in effect!',
     'full_site_promotion_time_range' => 'Time range: %s ~ %s',
+    'full_site_promotion_remark' => 'Note: %s',
+    'full_site_promotion_upcoming' => 'Upcoming full site [%s]',
     'text_torrent_to_approval' => 'There %s%u not approval torrent%s.',
     'std_confirm_remove' => 'Are you sure you want to delete it?',
     'select_an_user_class' => 'Select an user class',