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/大盘指数每日指标.md

@@ -0,0 +1,156 @@
+# 大盘指数每日指标
+
+**文档ID**: 128
+**原始链接**: https://tushare.pro/document/2?doc_id=128
+
+---
+
+## 大盘指数每日指标
+
+接口：index_dailybasic，可以通过数据工具调试和查看数据。描述：目前只提供上证综指，深证成指，上证50，中证500，中小板指，创业板指的每日指标数据数据来源：Tushare社区统计计算数据历史：从2004年1月开始提供数据权限：用户需要至少400积分才可以调取，具体请参阅积分获取办法
+
+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>trade_date</td>
+<td>str</td>
+<td>N</td>
+<td>交易日期 （格式：YYYYMMDD，比如20181018，下同）</td>
+</tr>
+<tr>
+<td>ts_code</td>
+<td>str</td>
+<td>N</td>
+<td>TS代码</td>
+</tr>
+<tr>
+<td>start_date</td>
+<td>str</td>
+<td>N</td>
+<td>开始日期</td>
+</tr>
+<tr>
+<td>end_date</td>
+<td>str</td>
+<td>N</td>
+<td>结束日期</td>
+</tr>
+</tbody></table>
+注：trade_date，ts_code 至少要输入一个参数，单次限量3000条（即，单一指数单次可提取超过12年历史），总量不限制。
+
+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>TS代码</td>
+</tr>
+<tr>
+<td>trade_date</td>
+<td>str</td>
+<td>Y</td>
+<td>交易日期</td>
+</tr>
+<tr>
+<td>total_mv</td>
+<td>float</td>
+<td>Y</td>
+<td>当日总市值（元）</td>
+</tr>
+<tr>
+<td>float_mv</td>
+<td>float</td>
+<td>Y</td>
+<td>当日流通市值（元）</td>
+</tr>
+<tr>
+<td>total_share</td>
+<td>float</td>
+<td>Y</td>
+<td>当日总股本（股）</td>
+</tr>
+<tr>
+<td>float_share</td>
+<td>float</td>
+<td>Y</td>
+<td>当日流通股本（股）</td>
+</tr>
+<tr>
+<td>free_share</td>
+<td>float</td>
+<td>Y</td>
+<td>当日自由流通股本（股）</td>
+</tr>
+<tr>
+<td>turnover_rate</td>
+<td>float</td>
+<td>Y</td>
+<td>换手率</td>
+</tr>
+<tr>
+<td>turnover_rate_f</td>
+<td>float</td>
+<td>Y</td>
+<td>换手率(基于自由流通股本)</td>
+</tr>
+<tr>
+<td>pe</td>
+<td>float</td>
+<td>Y</td>
+<td>市盈率</td>
+</tr>
+<tr>
+<td>pe_ttm</td>
+<td>float</td>
+<td>Y</td>
+<td>市盈率TTM</td>
+</tr>
+<tr>
+<td>pb</td>
+<td>float</td>
+<td>Y</td>
+<td>市净率</td>
+</tr>
+</tbody></table>
+接口示例
+
+```
+
+pro = ts.pro_api()
+
+df = pro.index_dailybasic(trade_date='20181018', fields='ts_code,trade_date,turnover_rate,pe')
+
+```
+
+数据示例
+
+```
+    ts_code  trade_date  turnover_rate     pe
+0  000001.SH   20181018           0.38  11.92
+1  000300.SH   20181018           0.27  11.17
+2  000905.SH   20181018           0.82  18.03
+3  399001.SZ   20181018           0.88  17.48
+4  399005.SZ   20181018           0.85  21.43
+5  399006.SZ   20181018           1.50  29.56
+6  399016.SZ   20181018           1.06  18.86
+7  399300.SZ   20181018           0.27  11.17
+```