feat: multimodal image clients, workspaces, Tushare skill, test fixes

- Replace monolithic image_message_client with HTTP/OCR/legacy modules; tighten OpenAI transport + tool schemas for multimodal downgrade to OCR specialist path.
- Add image/stock workspace prompts (META/SOUL/ROLE_SYSTEM); register experts; tweak specialist agent/direct loop/query_image_attachment.
- Add bundled runtime/skills/tushare-finance (references, api_client, SKILL metadata).
- Document OCR-related env vars; admin chat tweaks; README; weixin_install Ensure-OfficialPluginRuntimeDeps helper.
- Tests: multimodal downgrade + OCR coverage, strict tool pairing in attachment replay guard, workspace contract skips _internal/_system dirs, router/trace/prompt guards.

Co-authored-by: Cursor <cursoragent@cursor.com>

runtime/skills/tushare-finance/reference/接口文档/ST股票列表.md

@@ -0,0 +1,118 @@
+# ST股票列表
+
+**文档ID**: 397
+**原始链接**: https://tushare.pro/document/2?doc_id=397
+
+---
+
+## ST股票列表
+
+接口：stock_st，可以通过数据工具调试和查看数据。描述：获取ST股票列表，可根据交易日期获取历史上每天的ST列表权限：3000积分起提示：每天上午9:20更新，单次请求最大返回1000行数据，可循环提取,本接口数据从20160101开始,太早历史无法补齐
+
+输入参数
+
+<table>
+<thead>
+<tr>
+<th>名称</th>
+<th>类型</th>
+<th>必选</th>
+<th>描述</th>
+</tr>
+</thead>
+<tbody><tr>
+<td>ts_code</td>
+<td>str</td>
+<td>N</td>
+<td>股票代码</td>
+</tr>
+<tr>
+<td>trade_date</td>
+<td>str</td>
+<td>N</td>
+<td>交易日期（格式：YYYYMMDD下同）</td>
+</tr>
+<tr>
+<td>start_date</td>
+<td>str</td>
+<td>N</td>
+<td>开始时间</td>
+</tr>
+<tr>
+<td>end_date</td>
+<td>str</td>
+<td>N</td>
+<td>结束时间</td>
+</tr>
+</tbody></table>
+输出参数
+
+<table>
+<thead>
+<tr>
+<th>名称</th>
+<th>类型</th>
+<th>默认显示</th>
+<th>描述</th>
+</tr>
+</thead>
+<tbody><tr>
+<td>ts_code</td>
+<td>str</td>
+<td>Y</td>
+<td>股票代码</td>
+</tr>
+<tr>
+<td>name</td>
+<td>str</td>
+<td>Y</td>
+<td>股票名称</td>
+</tr>
+<tr>
+<td>trade_date</td>
+<td>str</td>
+<td>Y</td>
+<td>交易日期</td>
+</tr>
+<tr>
+<td>type</td>
+<td>str</td>
+<td>Y</td>
+<td>类型</td>
+</tr>
+<tr>
+<td>type_name</td>
+<td>str</td>
+<td>Y</td>
+<td>类型名称</td>
+</tr>
+</tbody></table>
+接口用法
+
+```
+
+pro = ts.pro_api()
+
+#获取20250813日所有的ST股票
+df = pro.stock_st(trade_date='20250813')
+
+
+```
+
+数据样例
+
+```
+             ts_code   name trade_date type type_name
+0    300313.SZ  *ST天山   20250813   ST     风险警示板
+1    605081.SH  *ST太和   20250813   ST     风险警示板
+2    300391.SZ  *ST长药   20250813   ST     风险警示板
+3    300343.SZ   ST联创   20250813   ST     风险警示板
+4    300044.SZ   ST赛为   20250813   ST     风险警示板
+..         ...    ...        ...  ...       ...
+170  300175.SZ   ST朗源   20250813   ST     风险警示板
+171  603721.SH  *ST天择   20250813   ST     风险警示板
+172  600289.SH   ST信通   20250813   ST     风险警示板
+173  000929.SZ  *ST兰黄   20250813   ST     风险警示板
+174  000638.SZ  *ST万方   20250813   ST     风险警示板
+
+```