feat: 初始化考培练系统项目

- 从服务器拉取完整代码
- 按框架规范整理项目结构
- 配置 Drone CI 测试环境部署
- 包含后端(FastAPI)、前端(Vue3)、管理端

技术栈: Vue3 + TypeScript + FastAPI + MySQL

backend/scripts/create_course_exam_settings.sql

@@ -0,0 +1,35 @@
+-- 创建课程考试设置表
+CREATE TABLE IF NOT EXISTS course_exam_settings (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    course_id INT NOT NULL UNIQUE COMMENT '课程ID',
+    single_choice_count INT NOT NULL DEFAULT 10 COMMENT '单选题数量',
+    multiple_choice_count INT NOT NULL DEFAULT 5 COMMENT '多选题数量',
+    true_false_count INT NOT NULL DEFAULT 5 COMMENT '判断题数量',
+    fill_blank_count INT NOT NULL DEFAULT 0 COMMENT '填空题数量',
+    duration_minutes INT NOT NULL DEFAULT 60 COMMENT '考试时长(分钟)',
+    difficulty_level INT NOT NULL DEFAULT 3 COMMENT '难度系数(1-5)',
+    passing_score INT NOT NULL DEFAULT 60 COMMENT '及格分数',
+    is_enabled BOOLEAN NOT NULL DEFAULT TRUE COMMENT '是否启用',
+    show_answer_immediately BOOLEAN NOT NULL DEFAULT FALSE COMMENT '是否立即显示答案',
+    allow_retake BOOLEAN NOT NULL DEFAULT TRUE COMMENT '是否允许重考',
+    max_retake_times INT COMMENT '最大重考次数',
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    created_by INT COMMENT '创建人ID',
+    updated_by INT COMMENT '更新人ID',
+    is_deleted BOOLEAN NOT NULL DEFAULT FALSE,
+    deleted_at DATETIME,
+    deleted_by INT COMMENT '删除人ID',
+    FOREIGN KEY (course_id) REFERENCES courses(id),
+    INDEX ix_course_exam_settings_id (id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='课程考试设置表';
+
+-- 插入示例课程考试设置
+INSERT INTO course_exam_settings (course_id, single_choice_count, multiple_choice_count, true_false_count, duration_minutes)
+VALUES 
+(1, 15, 8, 5, 60),
+(2, 20, 10, 10, 90),
+(3, 10, 5, 5, 45),
+(4, 12, 6, 8, 60);
+
+SELECT 'Course exam settings table created successfully!' as message;