feat: Phase 2 交互与纠错工作台完成

- 新增实体编辑 API (名称、类型、定义、别名)
- 新增实体删除和合并功能
- 新增关系管理 (创建、删除)
- 新增转录文本编辑功能
- 新增划词创建实体功能
- 前端新增实体编辑器模态框
- 前端新增右键菜单和工具栏
- 文本与图谱双向联动优化

backend/db_manager.py

@@ -290,6 +290,104 @@ class DatabaseManager:
         ).fetchall()
         conn.close()
         return [dict(r) for r in rows]
+    
+    def update_entity(self, entity_id: str, **kwargs) -> Entity:
+        """更新实体信息"""
+        conn = self.get_conn()
+        
+        # 构建更新字段
+        allowed_fields = ['name', 'type', 'definition', 'canonical_name']
+        updates = []
+        values = []
+        
+        for field in allowed_fields:
+            if field in kwargs:
+                updates.append(f"{field} = ?")
+                values.append(kwargs[field])
+        
+        # 处理别名
+        if 'aliases' in kwargs:
+            updates.append("aliases = ?")
+            values.append(json.dumps(kwargs['aliases']))
+        
+        if not updates:
+            conn.close()
+            return self.get_entity(entity_id)
+        
+        updates.append("updated_at = ?")
+        values.append(datetime.now().isoformat())
+        values.append(entity_id)
+        
+        query = f"UPDATE entities SET {', '.join(updates)} WHERE id = ?"
+        conn.execute(query, values)
+        conn.commit()
+        conn.close()
+        
+        return self.get_entity(entity_id)
+    
+    def delete_entity(self, entity_id: str):
+        """删除实体及其关联数据"""
+        conn = self.get_conn()
+        
+        # 删除提及记录
+        conn.execute("DELETE FROM entity_mentions WHERE entity_id = ?", (entity_id,))
+        
+        # 删除关系
+        conn.execute("DELETE FROM entity_relations WHERE source_entity_id = ? OR target_entity_id = ?", 
+                     (entity_id, entity_id))
+        
+        # 删除实体
+        conn.execute("DELETE FROM entities WHERE id = ?", (entity_id,))
+        
+        conn.commit()
+        conn.close()
+    
+    def delete_relation(self, relation_id: str):
+        """删除关系"""
+        conn = self.get_conn()
+        conn.execute("DELETE FROM entity_relations WHERE id = ?", (relation_id,))
+        conn.commit()
+        conn.close()
+    
+    def update_relation(self, relation_id: str, **kwargs) -> dict:
+        """更新关系"""
+        conn = self.get_conn()
+        
+        allowed_fields = ['relation_type', 'evidence']
+        updates = []
+        values = []
+        
+        for field in allowed_fields:
+            if field in kwargs:
+                updates.append(f"{field} = ?")
+                values.append(kwargs[field])
+        
+        if updates:
+            query = f"UPDATE entity_relations SET {', '.join(updates)} WHERE id = ?"
+            values.append(relation_id)
+            conn.execute(query, values)
+            conn.commit()
+        
+        row = conn.execute("SELECT * FROM entity_relations WHERE id = ?", (relation_id,)).fetchone()
+        conn.close()
+        
+        return dict(row) if row else None
+    
+    def update_transcript(self, transcript_id: str, full_text: str) -> dict:
+        """更新转录文本"""
+        conn = self.get_conn()
+        now = datetime.now().isoformat()
+        
+        conn.execute(
+            "UPDATE transcripts SET full_text = ?, updated_at = ? WHERE id = ?",
+            (full_text, now, transcript_id)
+        )
+        conn.commit()
+        
+        row = conn.execute("SELECT * FROM transcripts WHERE id = ?", (transcript_id,)).fetchone()
+        conn.close()
+        
+        return dict(row) if row else None
 
 
 # Singleton instance