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/每日涨跌停价格.md

@@ -0,0 +1,131 @@
+# 每日涨跌停价格
+
+**文档ID**: 183
+**原始链接**: https://tushare.pro/document/2?doc_id=183
+
+---
+
+## 每日涨跌停价格
+
+接口：stk_limit描述：获取全市场（包含A/B股和基金）每日涨跌停价格，包括涨停价格，跌停价格等，每个交易日8点40左右更新当日股票涨跌停价格。限量：单次最多提取5800条记录，可循环调取，总量不限制积分：用户积2000积分可调取，单位分钟有流控，积分越高流量越大，请自行提高积分，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>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</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>
+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>trade_date</td>
+<td>str</td>
+<td>Y</td>
+<td>交易日期</td>
+</tr>
+<tr>
+<td>ts_code</td>
+<td>str</td>
+<td>Y</td>
+<td>TS股票代码</td>
+</tr>
+<tr>
+<td>pre_close</td>
+<td>float</td>
+<td>N</td>
+<td>昨日收盘价</td>
+</tr>
+<tr>
+<td>up_limit</td>
+<td>float</td>
+<td>Y</td>
+<td>涨停价</td>
+</tr>
+<tr>
+<td>down_limit</td>
+<td>float</td>
+<td>Y</td>
+<td>跌停价</td>
+</tr>
+</tbody></table>
+接口示例
+
+```
+
+pro = ts.pro_api()
+
+#获取单日全部股票数据涨跌停价格
+df = pro.stk_limit(trade_date='20190625')
+
+#获取单个股票数据
+df = pro.stk_limit(ts_code='002149.SZ', start_date='20190115', end_date='20190615')
+
+
+```
+
+数据示例
+
+```
+     trade_date    ts_code  up_limit  down_limit
+0      20190625  000001.SZ     15.06       12.32
+1      20190625  000002.SZ     30.94       25.32
+2      20190625  000004.SZ     25.15       20.57
+3      20190625  000005.SZ      3.49        2.85
+4      20190625  000006.SZ      6.14        5.02
+5      20190625  000007.SZ      7.74        6.34
+6      20190625  000008.SZ      4.28        3.50
+7      20190625  000009.SZ      6.36        5.20
+8      20190625  000010.SZ      3.51        3.17
+9      20190625  000011.SZ     10.58        8.66
+10     20190625  000012.SZ      5.16        4.22
+11     20190625  000014.SZ     10.98        8.98
+12     20190625  000016.SZ      4.81        3.93
+13     20190625  000017.SZ      5.15        4.21
+14     20190625  000018.SZ      1.44        1.30
+15     20190625  000019.SZ      8.09        6.62
+16     20190625  000020.SZ     12.21        9.99
+17     20190625  000021.SZ      9.30        7.61
+18     20190625  000023.SZ     14.61       11.95
+19     20190625  000025.SZ     23.08       18.88
+20     20190625  000026.SZ      8.66        7.08
+
+```