新增解答题拍照判分:百炼 Qwen-VL 按评分点逐点判分,无 API Key 时演示判分回退;混合卷按真实分值加权计分;判分照片与评分点进错题本;补齐历史迁移缺口(0005 模板生效方式/0006 五张缺失表+grammar_progress point_id)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

drizzle/0005_task-template-mode.sql

@@ -0,0 +1,11 @@
+-- xuchao: 补齐 task_template 的模板生效方式字段。生产库曾手工 ALTER 过这三列,
+-- 故用 information_schema 判断实现幂等:已存在则跳过,保证生产与全新库都能安全执行。
+SET @has_mode = (SELECT COUNT(*) FROM information_schema.columns WHERE table_schema = DATABASE() AND table_name = 'task_template' AND column_name = 'mode');
+--> statement-breakpoint
+SET @ddl = IF(@has_mode = 0, 'ALTER TABLE `task_template` ADD COLUMN `mode` varchar(10) NOT NULL DEFAULT ''weekly'', ADD COLUMN `date_start` date, ADD COLUMN `date_end` date', 'SELECT 1');
+--> statement-breakpoint
+PREPARE stmt FROM @ddl;
+--> statement-breakpoint
+EXECUTE stmt;
+--> statement-breakpoint
+DEALLOCATE PREPARE stmt;