feat: BossAi v2.0 UI/UX 重构 + 看板断点续接 + 多轮上下文

- 新增 web2/ 前端:任务卡看板、风险雷达、决策日志、我的团队、快捷指令
- ChatPanel 增强:风险卡置顶、案卡接入、起诉状向导、语音输入
- 事项看板:点击查看详情弹窗、断点续接(恢复历史对话+matterId)
- 保密模式恢复:密码验证后重建内存 session,保留多轮上下文
- 多轮对话:ask/ask-stream/ask-analyze 注入 session 历史,AI 有上下文
- 追问优化:紧扣用户问题,不再偏离主题(社保问社保,工伤问工伤)
- 对话区可滚动,输入区固定可见
- 状态机放宽:允许从任意非终态转到 pending_expert
- session 存活检查端点,后端重启后自动重建 session
- DB migration:风险推送表、案卡表

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Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

db_init.py

@@ -193,6 +193,62 @@ CREATE INDEX IF NOT EXISTS idx_chat_messages_session ON chat_messages(session_id
 CREATE INDEX IF NOT EXISTS idx_chat_messages_phone ON chat_messages(phone);
 CREATE INDEX IF NOT EXISTS idx_chat_messages_phone_mode ON chat_messages(phone, mode);
 CREATE INDEX IF NOT EXISTS idx_chat_messages_created ON chat_messages(created_at DESC);
+
+-- ===== BossAi 2.0 新增表 =====
+
+-- 案卡:每次咨询绑定一张案卡,可视化追踪全生命周期
+CREATE TABLE IF NOT EXISTS matters (
+    id                SERIAL PRIMARY KEY,
+    code              TEXT NOT NULL UNIQUE,
+    user_phone        TEXT NOT NULL,
+    scene             TEXT NOT NULL,
+    title             TEXT NOT NULL,
+    status            TEXT NOT NULL DEFAULT 'new',
+    session_id        TEXT,
+    risk_level        TEXT,
+    summary           TEXT,
+    closed_at         TIMESTAMPTZ,
+    execution_result  TEXT,
+    execution_note    TEXT,
+    created_at        TIMESTAMPTZ NOT NULL DEFAULT now(),
+    updated_at        TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+CREATE INDEX IF NOT EXISTS idx_matters_user_phone ON matters(user_phone);
+CREATE INDEX IF NOT EXISTS idx_matters_status ON matters(status);
+CREATE INDEX IF NOT EXISTS idx_matters_user_status ON matters(user_phone, status);
+CREATE INDEX IF NOT EXISTS idx_matters_created ON matters(created_at DESC);
+
+-- 专家关系:用户咨询过的专家自动沉淀为"我的团队"
+CREATE TABLE IF NOT EXISTS expert_relations (
+    id                   SERIAL PRIMARY KEY,
+    user_phone           TEXT NOT NULL,
+    expert_id            INTEGER NOT NULL REFERENCES experts(id),
+    consultation_count   INTEGER NOT NULL DEFAULT 0,
+    last_consulted_at    TIMESTAMPTZ,
+    last_topic           TEXT,
+    tags                 TEXT,
+    created_at           TIMESTAMPTZ NOT NULL DEFAULT now(),
+    updated_at           TIMESTAMPTZ NOT NULL DEFAULT now(),
+    UNIQUE(user_phone, expert_id)
+);
+CREATE INDEX IF NOT EXISTS idx_expert_relations_user ON expert_relations(user_phone);
+CREATE INDEX IF NOT EXISTS idx_expert_relations_expert ON expert_relations(expert_id);
+
+-- 风险推送:AI 主动提醒用户行业新规、合同风险等
+CREATE TABLE IF NOT EXISTS risk_alerts (
+    id                SERIAL PRIMARY KEY,
+    user_phone        TEXT NOT NULL,
+    level             TEXT NOT NULL,
+    title             TEXT NOT NULL,
+    content           TEXT NOT NULL,
+    source            TEXT NOT NULL DEFAULT 'knowledge',
+    related_matter_id INTEGER,
+    read_at           TIMESTAMPTZ,
+    created_at        TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+CREATE INDEX IF NOT EXISTS idx_risk_alerts_user ON risk_alerts(user_phone);
+CREATE INDEX IF NOT EXISTS idx_risk_alerts_user_read ON risk_alerts(user_phone, read_at);
+CREATE INDEX IF NOT EXISTS idx_risk_alerts_created ON risk_alerts(created_at DESC);
 """
 
 # 专家种子数据(密码统一为 expert123,生产环境应让专家自行注册)
@@ -286,6 +342,8 @@ def main():
         BEGIN ALTER TABLE review_tickets ADD COLUMN sla_deadline TIMESTAMPTZ; EXCEPTION WHEN duplicate_column THEN NULL; END;
         BEGIN ALTER TABLE review_tickets ADD COLUMN sla_status TEXT NOT NULL DEFAULT 'normal'; EXCEPTION WHEN duplicate_column THEN NULL; END;
         BEGIN ALTER TABLE users ADD COLUMN status TEXT NOT NULL DEFAULT 'active'; EXCEPTION WHEN duplicate_column THEN NULL; END;
+        -- 2.0:chat_messages 关联案卡
+        BEGIN ALTER TABLE chat_messages ADD COLUMN matter_id INTEGER; EXCEPTION WHEN duplicate_column THEN NULL; END;
     END $$;
     """)
 
@@ -309,6 +367,8 @@ def main():
 
     # SLA 索引(列已确保存在后创建)
     cur.execute("CREATE INDEX IF NOT EXISTS idx_review_tickets_sla ON review_tickets(sla_status)")
+    # 2.0:案卡关联索引
+    cur.execute("CREATE INDEX IF NOT EXISTS idx_chat_messages_matter ON chat_messages(matter_id)")
 
     # 清除所有旧知识数据(测试数据已废弃,重新种子)
     cur.execute("DELETE FROM knowledge_doc_versions")