[Bug]: 对<thought>...</thought>标签包裹的思考内容进行处理有问题，导致了不能处理部分模型供应商返回的思考过程

## CoPaw Version

1.02

## Description

src/copaw/local_models/tag_parser.py 对`...`标签包裹的思考内容没有进行处理，导致不能折叠部分模型供应商返回的思考过程，而是直接显示在回答中了

## Component(s) Affected

- [x] Core / Backend (app, agents, config, providers, utils, local_models)
- [ ] Console (frontend web UI)
- [ ] Channels (DingTalk, Feishu, QQ, Discord, iMessage, etc.)
- [ ] Skills
- [ ] CLI
- [ ] Documentation (website)
- [ ] Tests
- [ ] CI/CD
- [ ] Scripts / Deploy

## Environment

- **CoPaw version:1.0.2
- **OS:ubuntu 24.04
- **Install method:one-line install
- **Python version (if applicable):3.12