diff --git a/create_prediction_tables.sql b/create_prediction_tables.sql
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+-- 预测市场数据库表创建脚本
+-- 数据库: stock (222.128.1.157:33060)
+-- 执行时间: 2025-11-23
+
+-- 1. 用户积分账户表
+CREATE TABLE IF NOT EXISTS user_credit_account (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    user_id INT NOT NULL UNIQUE,
+    balance FLOAT DEFAULT 10000.0 NOT NULL COMMENT '积分余额',
+    frozen_balance FLOAT DEFAULT 0.0 NOT NULL COMMENT '冻结积分',
+    total_earned FLOAT DEFAULT 0.0 NOT NULL COMMENT '累计获得',
+    total_spent FLOAT DEFAULT 0.0 NOT NULL COMMENT '累计消费',
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    last_daily_bonus_at DATETIME COMMENT '最后一次领取每日奖励时间',
+    FOREIGN KEY (user_id) REFERENCES user(id) ON DELETE CASCADE,
+    INDEX idx_user_id (user_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='用户积分账户';
+
+-- 2. 预测话题表
+CREATE TABLE IF NOT EXISTS prediction_topic (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    creator_id INT NOT NULL,
+    title VARCHAR(200) NOT NULL COMMENT '话题标题',
+    description TEXT COMMENT '话题描述',
+    category VARCHAR(50) DEFAULT 'stock' COMMENT '分类: stock/index/concept/policy/event/other',
+
+    -- 市场数据
+    yes_total_shares INT DEFAULT 0 NOT NULL COMMENT 'YES方总份额',
+    no_total_shares INT DEFAULT 0 NOT NULL COMMENT 'NO方总份额',
+    yes_price FLOAT DEFAULT 500.0 NOT NULL COMMENT 'YES方价格（0-1000）',
+    no_price FLOAT DEFAULT 500.0 NOT NULL COMMENT 'NO方价格（0-1000）',
+
+    -- 奖池
+    total_pool FLOAT DEFAULT 0.0 NOT NULL COMMENT '总奖池（2%交易税累积）',
+
+    -- 领主信息
+    yes_lord_id INT COMMENT 'YES方领主',
+    no_lord_id INT COMMENT 'NO方领主',
+
+    -- 状态
+    status VARCHAR(20) DEFAULT 'active' NOT NULL COMMENT '状态: active/settled/cancelled',
+    result VARCHAR(10) COMMENT '结算结果: yes/no/draw',
+
+    -- 时间
+    deadline DATETIME NOT NULL COMMENT '截止时间',
+    settled_at DATETIME COMMENT '结算时间',
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+
+    -- 统计
+    views_count INT DEFAULT 0,
+    comments_count INT DEFAULT 0,
+    participants_count INT DEFAULT 0,
+
+    FOREIGN KEY (creator_id) REFERENCES user(id),
+    FOREIGN KEY (yes_lord_id) REFERENCES user(id),
+    FOREIGN KEY (no_lord_id) REFERENCES user(id),
+    INDEX idx_creator_id (creator_id),
+    INDEX idx_status (status),
+    INDEX idx_category (category),
+    INDEX idx_created_at (created_at)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='预测话题';
+
+-- 3. 用户持仓表
+CREATE TABLE IF NOT EXISTS prediction_position (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    user_id INT NOT NULL,
+    topic_id INT NOT NULL,
+    direction VARCHAR(3) NOT NULL COMMENT '方向: yes/no',
+    shares INT DEFAULT 0 NOT NULL COMMENT '持有份额',
+    avg_cost FLOAT DEFAULT 0.0 NOT NULL COMMENT '平均成本',
+    total_invested FLOAT DEFAULT 0.0 NOT NULL COMMENT '总投入',
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+
+    FOREIGN KEY (user_id) REFERENCES user(id) ON DELETE CASCADE,
+    FOREIGN KEY (topic_id) REFERENCES prediction_topic(id) ON DELETE CASCADE,
+    UNIQUE KEY unique_position (user_id, topic_id, direction),
+    INDEX idx_user_topic (user_id, topic_id),
+    INDEX idx_topic (topic_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='用户持仓';
+
+-- 4. 交易记录表
+CREATE TABLE IF NOT EXISTS prediction_transaction (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    user_id INT NOT NULL,
+    topic_id INT NOT NULL,
+    direction VARCHAR(3) NOT NULL COMMENT '方向: yes/no',
+    trade_type VARCHAR(10) NOT NULL COMMENT '交易类型: buy/sell',
+    shares INT NOT NULL COMMENT '交易份额',
+    price FLOAT NOT NULL COMMENT '交易价格',
+    amount FLOAT NOT NULL COMMENT '交易金额',
+    tax FLOAT DEFAULT 0.0 NOT NULL COMMENT '交易税',
+    total_cost FLOAT NOT NULL COMMENT '总成本（含税）',
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    FOREIGN KEY (user_id) REFERENCES user(id),
+    FOREIGN KEY (topic_id) REFERENCES prediction_topic(id),
+    INDEX idx_user_id (user_id),
+    INDEX idx_topic_id (topic_id),
+    INDEX idx_created_at (created_at)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='交易记录';
+
+-- 5. 话题评论表
+CREATE TABLE IF NOT EXISTS topic_comment (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    topic_id INT NOT NULL,
+    user_id INT NOT NULL,
+    content TEXT NOT NULL COMMENT '评论内容',
+    direction VARCHAR(3) COMMENT '预测方向: yes/no',
+    is_published BOOLEAN DEFAULT FALSE NOT NULL COMMENT '是否已发布',
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+
+    -- 观点IPO 相关
+    total_investment INT DEFAULT 0 NOT NULL COMMENT '总投资额',
+    investor_count INT DEFAULT 0 NOT NULL COMMENT '投资人数',
+    is_verified BOOLEAN DEFAULT FALSE NOT NULL COMMENT '是否已验证',
+    verification_result VARCHAR(20) COMMENT '验证结果: correct/incorrect',
+    position_rank INT COMMENT '评论位置排名',
+
+    FOREIGN KEY (topic_id) REFERENCES prediction_topic(id) ON DELETE CASCADE,
+    FOREIGN KEY (user_id) REFERENCES user(id),
+    INDEX idx_topic_id (topic_id),
+    INDEX idx_user_id (user_id),
+    INDEX idx_position_rank (position_rank)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='话题评论';
+
+-- 6. 评论投资记录表（观点IPO）
+CREATE TABLE IF NOT EXISTS comment_investment (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    comment_id INT NOT NULL,
+    user_id INT NOT NULL,
+    shares INT NOT NULL COMMENT '投资份额',
+    amount INT NOT NULL COMMENT '投资金额',
+    avg_price FLOAT NOT NULL COMMENT '平均价格',
+    status VARCHAR(20) DEFAULT 'active' NOT NULL COMMENT '状态: active/settled',
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    FOREIGN KEY (comment_id) REFERENCES topic_comment(id) ON DELETE CASCADE,
+    FOREIGN KEY (user_id) REFERENCES user(id),
+    INDEX idx_comment_id (comment_id),
+    INDEX idx_user_id (user_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='评论投资记录';
+
+-- 7. 评论位置竞拍记录（首发权拍卖）
+CREATE TABLE IF NOT EXISTS comment_position_bid (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    topic_id INT NOT NULL,
+    user_id INT NOT NULL,
+    position INT NOT NULL COMMENT '位置：1/2/3',
+    bid_amount INT NOT NULL COMMENT '竞拍金额',
+    status VARCHAR(20) DEFAULT 'pending' NOT NULL COMMENT '状态: pending/won/outbid',
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    expires_at DATETIME NOT NULL COMMENT '过期时间',
+
+    FOREIGN KEY (topic_id) REFERENCES prediction_topic(id) ON DELETE CASCADE,
+    FOREIGN KEY (user_id) REFERENCES user(id),
+    INDEX idx_topic_id (topic_id),
+    INDEX idx_user_id (user_id),
+    INDEX idx_position (topic_id, position)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='评论位置竞拍记录';
+
+-- 8. 时间胶囊话题表
+CREATE TABLE IF NOT EXISTS time_capsule_topic (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    user_id INT NOT NULL,
+    title VARCHAR(200) NOT NULL COMMENT '话题标题',
+    description TEXT COMMENT '话题描述',
+    encrypted_content TEXT COMMENT '加密的预测内容',
+    encryption_key VARCHAR(500) COMMENT '加密密钥（后端存储）',
+    start_year INT NOT NULL COMMENT '开始年份',
+    end_year INT NOT NULL COMMENT '结束年份',
+    status VARCHAR(20) DEFAULT 'active' NOT NULL COMMENT '状态: active/settled/cancelled',
+    is_decrypted BOOLEAN DEFAULT FALSE NOT NULL COMMENT '是否已解密',
+    actual_happened_year INT COMMENT '实际发生年份',
+    total_pool INT DEFAULT 0 NOT NULL COMMENT '总奖池',
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    FOREIGN KEY (user_id) REFERENCES user(id),
+    INDEX idx_user_id (user_id),
+    INDEX idx_status (status),
+    INDEX idx_year_range (start_year, end_year)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='时间胶囊话题';
+
+-- 9. 时间胶囊时间段表
+CREATE TABLE IF NOT EXISTS time_capsule_time_slot (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    topic_id INT NOT NULL,
+    year_start INT NOT NULL COMMENT '年份区间开始',
+    year_end INT NOT NULL COMMENT '年份区间结束',
+    current_holder_id INT COMMENT '当前持有者',
+    current_price INT DEFAULT 100 NOT NULL COMMENT '当前价格',
+    total_bids INT DEFAULT 0 NOT NULL COMMENT '总竞拍次数',
+    status VARCHAR(20) DEFAULT 'active' NOT NULL COMMENT '状态: active/settled',
+
+    FOREIGN KEY (topic_id) REFERENCES time_capsule_topic(id) ON DELETE CASCADE,
+    FOREIGN KEY (current_holder_id) REFERENCES user(id),
+    INDEX idx_topic_id (topic_id),
+    INDEX idx_holder (current_holder_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='时间胶囊时间段';
+
+-- 10. 时间段竞拍记录表
+CREATE TABLE IF NOT EXISTS time_slot_bid (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    slot_id INT NOT NULL,
+    user_id INT NOT NULL,
+    bid_amount INT NOT NULL COMMENT '竞拍金额',
+    status VARCHAR(20) DEFAULT 'outbid' NOT NULL COMMENT '状态: current/outbid/won',
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    FOREIGN KEY (slot_id) REFERENCES time_capsule_time_slot(id) ON DELETE CASCADE,
+    FOREIGN KEY (user_id) REFERENCES user(id),
+    INDEX idx_slot_id (slot_id),
+    INDEX idx_user_id (user_id),
+    INDEX idx_created_at (created_at)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='时间段竞拍记录';