feat(settings): support dual-mode wechat oauth defaults

backend/migrations/118_wechat_dual_mode_and_auth_source_defaults.sql

@@ -0,0 +1,32 @@
+INSERT INTO settings (key, value)
+VALUES
+    (
+        'wechat_connect_open_enabled',
+        CASE
+            WHEN COALESCE((SELECT value FROM settings WHERE key = 'wechat_connect_enabled'), 'false') <> 'true' THEN 'false'
+            WHEN LOWER(TRIM(COALESCE((SELECT value FROM settings WHERE key = 'wechat_connect_mode'), 'open'))) = 'mp' THEN 'false'
+            ELSE 'true'
+        END
+    ),
+    (
+        'wechat_connect_mp_enabled',
+        CASE
+            WHEN COALESCE((SELECT value FROM settings WHERE key = 'wechat_connect_enabled'), 'false') <> 'true' THEN 'false'
+            WHEN LOWER(TRIM(COALESCE((SELECT value FROM settings WHERE key = 'wechat_connect_mode'), 'open'))) = 'mp' THEN 'true'
+            ELSE 'false'
+        END
+    ),
+    ('auth_source_default_email_grant_on_signup', 'false'),
+    ('auth_source_default_linuxdo_grant_on_signup', 'false'),
+    ('auth_source_default_oidc_grant_on_signup', 'false'),
+    ('auth_source_default_wechat_grant_on_signup', 'false')
+ON CONFLICT (key) DO NOTHING;
+
+UPDATE settings
+SET value = 'false'
+WHERE key IN (
+    'auth_source_default_email_grant_on_signup',
+    'auth_source_default_linuxdo_grant_on_signup',
+    'auth_source_default_oidc_grant_on_signup',
+    'auth_source_default_wechat_grant_on_signup'
+);