feat: 实现完整安全防护系统

Phase 1 - 威胁检测引擎:
- security/threat_detector.py: JNDI/SQL/XSS/路径遍历/命令注入检测
- security/constants.py: 威胁检测规则和评分常量
- 数据库表: threat_events, ip_risk_scores, user_risk_scores, ip_blacklist

Phase 2 - 风险评分与黑名单:
- security/risk_scorer.py: IP/用户风险评分引擎，支持分数衰减
- security/blacklist.py: 黑名单管理，自动封禁规则

Phase 3 - 响应策略:
- security/honeypot.py: 蜜罐响应生成器
- security/response_handler.py: 渐进式响应策略

Phase 4 - 集成:
- security/middleware.py: Flask安全中间件
- routes/admin_api/security.py: 管理后台安全仪表板API
- 36个测试用例全部通过

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

db/migrations.py

@@ -72,6 +72,12 @@ def migrate_database(conn, target_version: int) -> None:
     if current_version < 12:
         _migrate_to_v12(conn)
         current_version = 12
+    if current_version < 13:
+        _migrate_to_v13(conn)
+        current_version = 13
+    if current_version < 14:
+        _migrate_to_v14(conn)
+        current_version = 14
 
     if current_version != int(target_version):
         set_current_version(conn, int(target_version))
@@ -519,3 +525,117 @@ def _migrate_to_v12(conn):
     cursor.execute("CREATE INDEX IF NOT EXISTS idx_login_ips_user ON login_ips(user_id)")
 
     conn.commit()
+
+
+def _migrate_to_v13(conn):
+    """迁移到版本13 - 安全防护：威胁检测相关表"""
+    cursor = conn.cursor()
+
+    cursor.execute(
+        """
+        CREATE TABLE IF NOT EXISTS threat_events (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            threat_type TEXT NOT NULL,
+            score INTEGER NOT NULL DEFAULT 0,
+            rule TEXT,
+            field_name TEXT,
+            matched TEXT,
+            value_preview TEXT,
+            ip TEXT,
+            user_id INTEGER,
+            request_method TEXT,
+            request_path TEXT,
+            user_agent TEXT,
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            FOREIGN KEY (user_id) REFERENCES users (id) ON DELETE CASCADE
+        )
+        """
+    )
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_threat_events_created_at ON threat_events(created_at)")
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_threat_events_ip ON threat_events(ip)")
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_threat_events_user_id ON threat_events(user_id)")
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_threat_events_type ON threat_events(threat_type)")
+
+    cursor.execute(
+        """
+        CREATE TABLE IF NOT EXISTS ip_risk_scores (
+            ip TEXT PRIMARY KEY,
+            risk_score INTEGER NOT NULL DEFAULT 0,
+            last_seen TIMESTAMP,
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+        )
+        """
+    )
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_ip_risk_scores_score ON ip_risk_scores(risk_score)")
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_ip_risk_scores_updated_at ON ip_risk_scores(updated_at)")
+
+    cursor.execute(
+        """
+        CREATE TABLE IF NOT EXISTS user_risk_scores (
+            user_id INTEGER PRIMARY KEY,
+            risk_score INTEGER NOT NULL DEFAULT 0,
+            last_seen TIMESTAMP,
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            FOREIGN KEY (user_id) REFERENCES users (id) ON DELETE CASCADE
+        )
+        """
+    )
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_user_risk_scores_score ON user_risk_scores(risk_score)")
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_user_risk_scores_updated_at ON user_risk_scores(updated_at)")
+
+    cursor.execute(
+        """
+        CREATE TABLE IF NOT EXISTS ip_blacklist (
+            ip TEXT PRIMARY KEY,
+            reason TEXT,
+            is_active INTEGER DEFAULT 1,
+            added_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            expires_at TIMESTAMP
+        )
+        """
+    )
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_ip_blacklist_active ON ip_blacklist(is_active)")
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_ip_blacklist_expires ON ip_blacklist(expires_at)")
+
+    cursor.execute(
+        """
+        CREATE TABLE IF NOT EXISTS threat_signatures (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            name TEXT UNIQUE NOT NULL,
+            threat_type TEXT NOT NULL,
+            pattern TEXT NOT NULL,
+            pattern_type TEXT DEFAULT 'regex',
+            score INTEGER DEFAULT 0,
+            is_active INTEGER DEFAULT 1,
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+        )
+        """
+    )
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_threat_signatures_type ON threat_signatures(threat_type)")
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_threat_signatures_active ON threat_signatures(is_active)")
+
+    conn.commit()
+
+
+def _migrate_to_v14(conn):
+    """迁移到版本14 - 安全防护：用户黑名单表"""
+    cursor = conn.cursor()
+
+    cursor.execute(
+        """
+        CREATE TABLE IF NOT EXISTS user_blacklist (
+            user_id INTEGER PRIMARY KEY,
+            reason TEXT,
+            is_active INTEGER DEFAULT 1,
+            added_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            expires_at TIMESTAMP
+        )
+        """
+    )
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_user_blacklist_active ON user_blacklist(is_active)")
+    cursor.execute("CREATE INDEX IF NOT EXISTS idx_user_blacklist_expires ON user_blacklist(expires_at)")
+
+    conn.commit()