Moved profile background settings out of the users table.

database/2025_02_08_175705_create_profile_background_settings_table.php

@@ -0,0 +1,42 @@
+<?php
+use Index\Db\DbConnection;
+use Index\Db\Migration\DbMigration;
+
+final class CreateProfileBackgroundSettingsTable_20250208_175705 implements DbMigration {
+    public function migrate(DbConnection $conn): void {
+        $conn->execute(<<<SQL
+            CREATE TABLE msz_profile_backgrounds (
+                user_id   INT UNSIGNED     NOT NULL AUTO_INCREMENT,
+                bg_attach ENUM('cover','stretch','tile','contain') NOT NULL,
+                bg_blend  TINYINT UNSIGNED NOT NULL,
+                bg_slide  TINYINT UNSIGNED NOT NULL,
+                PRIMARY KEY (user_id),
+                CONSTRAINT profile_backgrounds_users_foreign
+                    FOREIGN KEY (user_id)
+                    REFERENCES msz_users (user_id)
+                    ON UPDATE CASCADE
+                    ON DELETE CASCADE
+            ) COLLATE='utf8mb4_bin';
+        SQL);
+
+        $conn->execute(<<<SQL
+            INSERT INTO msz_profile_backgrounds
+            SELECT user_id,
+                CASE (user_background_settings & 0x0F)
+                    WHEN 1 THEN 'cover'
+                    WHEN 2 THEN 'stretch'
+                    WHEN 3 THEN 'tile'
+                    WHEN 4 THEN 'contain'
+                END,
+                IF(user_background_settings & 0x10, 1, 0),
+                IF(user_background_settings & 0x20, 1, 0)
+            FROM msz_users
+            WHERE (user_background_settings & 0x0F) BETWEEN 1 AND 4;
+        SQL);
+
+        $conn->execute(<<<SQL
+            ALTER TABLE msz_users
+                DROP COLUMN user_background_settings;
+        SQL);
+    }
+}