CREATE TABLE `user_model_preferences` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `user_id` BIGINT NOT NULL,
  `scope_key` VARCHAR(120) NOT NULL DEFAULT 'global',
  `project_id` BIGINT NULL,
  `preference_key` VARCHAR(120) NOT NULL,
  `text_provider_code` VARCHAR(100) NULL,
  `image_provider_code` VARCHAR(100) NULL,
  `video_provider_code` VARCHAR(100) NULL,
  `voice_provider_code` VARCHAR(100) NULL,
  `metadata_json` JSON NULL,
  `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  `updated_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
  PRIMARY KEY (`id`),
  UNIQUE INDEX `ump_user_scope_key_unique` (`user_id`, `scope_key`, `preference_key`),
  INDEX `ump_user_scope_idx` (`user_id`, `scope_key`),
  INDEX `ump_project_idx` (`project_id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

CREATE TABLE `project_visual_assets` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `project_id` BIGINT NOT NULL,
  `user_id` BIGINT NOT NULL,
  `asset_id` BIGINT NULL,
  `asset_kind` VARCHAR(50) NOT NULL,
  `asset_type` VARCHAR(80) NOT NULL,
  `name` VARCHAR(160) NOT NULL,
  `label` VARCHAR(160) NULL,
  `ownership_type` VARCHAR(50) NOT NULL DEFAULT 'shared_story',
  `owner_character_id` BIGINT NULL,
  `source_type` VARCHAR(80) NOT NULL DEFAULT 'manual',
  `source_label` VARCHAR(160) NULL,
  `prompt_text` LONGTEXT NULL,
  `negative_prompt` LONGTEXT NULL,
  `usage_tags_json` JSON NULL,
  `quality_score` DECIMAL(5, 2) NULL,
  `is_primary` BOOLEAN NOT NULL DEFAULT false,
  `metadata_json` JSON NULL,
  `status` VARCHAR(50) NOT NULL DEFAULT 'active',
  `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  `updated_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
  PRIMARY KEY (`id`),
  INDEX `pva_project_kind_status_idx` (`project_id`, `asset_kind`, `status`),
  INDEX `pva_project_type_idx` (`project_id`, `asset_type`),
  INDEX `pva_owner_character_idx` (`owner_character_id`),
  INDEX `pva_asset_idx` (`asset_id`),
  INDEX `pva_user_kind_idx` (`user_id`, `asset_kind`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;