feat(ECR-043): StarConfig 写面闭环并 Closed

加法权限 admin.explore.write、POST/PUT+审计、C端 GET /star/configs、
H5 无 active 空态/失败回退；migration 000052。ExploreConfig Loop STOP，禁自动 ECR-044。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/migrations/000052_ops_star_config_write.down.sql

@@ -0,0 +1,5 @@
+-- ECR-043 rollback
+
+DELETE FROM admin_role_permissions
+WHERE code = 'admin.explore.write'
+  AND role_id IN (SELECT id FROM admin_roles WHERE name = 'super_admin');

apps/api/migrations/000052_ops_star_config_write.up.sql

@@ -0,0 +1,7 @@
+-- ECR-043 ExploreConfig StarConfig write (additive permission)
+
+INSERT INTO admin_role_permissions(role_id, code)
+SELECT r.id, 'admin.explore.write'
+FROM admin_roles r
+WHERE r.name = 'super_admin'
+ON CONFLICT DO NOTHING;