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/前十大流通股东.md

@@ -0,0 +1,143 @@
+# 前十大流通股东
+
+**文档ID**: 62
+**原始链接**: https://tushare.pro/document/2?doc_id=62
+
+---
+
+## 前十大流通股东
+
+接口：top10_floatholders描述：获取上市公司前十大流通股东数据积分：需2000积分以上才可以调取本接口，5000积分以上频次会更高
+
+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>Y</td>
+<td>TS代码</td>
+</tr>
+<tr>
+<td>period</td>
+<td>str</td>
+<td>N</td>
+<td>报告期（YYYYMMDD格式，一般为每个季度最后一天）</td>
+</tr>
+<tr>
+<td>ann_date</td>
+<td>str</td>
+<td>N</td>
+<td>公告日期</td>
+</tr>
+<tr>
+<td>start_date</td>
+<td>str</td>
+<td>N</td>
+<td>报告期开始日期</td>
+</tr>
+<tr>
+<td>end_date</td>
+<td>str</td>
+<td>N</td>
+<td>报告期结束日期</td>
+</tr>
+</tbody></table>
+输出参数
+
+<table>
+<thead>
+<tr>
+<th>名称</th>
+<th>类型</th>
+<th>描述</th>
+</tr>
+</thead>
+<tbody><tr>
+<td>ts_code</td>
+<td>str</td>
+<td>TS股票代码</td>
+</tr>
+<tr>
+<td>ann_date</td>
+<td>str</td>
+<td>公告日期</td>
+</tr>
+<tr>
+<td>end_date</td>
+<td>str</td>
+<td>报告期</td>
+</tr>
+<tr>
+<td>holder_name</td>
+<td>str</td>
+<td>股东名称</td>
+</tr>
+<tr>
+<td>hold_amount</td>
+<td>float</td>
+<td>持有数量（股）</td>
+</tr>
+<tr>
+<td>hold_ratio</td>
+<td>float</td>
+<td>占总股本比例(%)</td>
+</tr>
+<tr>
+<td>hold_float_ratio</td>
+<td>float</td>
+<td>占流通股本比例(%)</td>
+</tr>
+<tr>
+<td>hold_change</td>
+<td>float</td>
+<td>持股变动</td>
+</tr>
+<tr>
+<td>holder_type</td>
+<td>str</td>
+<td>股东类型</td>
+</tr>
+</tbody></table>
+接口用法
+
+```
+
+pro = ts.pro_api()
+
+df = pro.top10_floatholders(ts_code='600000.SH', start_date='20170101', end_date='20171231')
+
+```
+
+或者
+
+```
+
+df = pro.query('top10_floatholders', ts_code='600000.SH', start_date='20170101', end_date='20171231')
+
+```
+
+数据样例
+
+```
+     ts_code  ann_date  end_date                        holder_name   hold_amount
+0  600000.SH  20180428  20171231  富德生命人寿保险股份有限公司-资本金  1.763232e+09
+1  600000.SH  20180428  20171231          上海国际集团有限公司  5.489319e+09
+2  600000.SH  20180428  20171231   富德生命人寿保险股份有限公司-传统  2.779437e+09
+3  600000.SH  20180428  20171231        中国证券金融股份有限公司  1.216979e+09
+4  600000.SH  20180428  20171231       梧桐树投资平台有限责任公司  8.861313e+08
+5  600000.SH  20180428  20171231       上海上国投资产管理有限公司  1.395571e+09
+6  600000.SH  20180428  20171231  富德生命人寿保险股份有限公司-万能H  1.270429e+09
+7  600000.SH  20180428  20171231        上海国鑫投资发展有限公司  5.392559e+08
+8  600000.SH  20180428  20171231      中央汇金资产管理有限责任公司  3.985214e+08
+9  600000.SH  20180428  20171231      中国移动通信集团广东有限公司  5.334893e+09
+
+```