Add dark mode support

migrations/20260516170852_drop_columns.sql

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+SET foreign_key_checks = 0;
+
+-- Drop all old tables
+DROP TABLE IF EXISTS users_old;
+DROP TABLE IF EXISTS messages;
+DROP TABLE IF EXISTS embeds;
+DROP TABLE IF EXISTS embed_fields;
+DROP TABLE IF EXISTS command_aliases;
+DROP TABLE IF EXISTS macro;
+DROP TABLE IF EXISTS roles;
+DROP TABLE IF EXISTS command_restrictions;
+
+-- Drop columns from channels that are no longer used
+ALTER TABLE channels DROP COLUMN `name`;
+ALTER TABLE channels DROP COLUMN `blacklisted`;
+
+SET foreign_key_checks = 1;