feat(cron): support fresh execution sessions

[cnyarx]

Summary

• support fresh execution sessions for cron agent jobs while continuing to deliver output to the configured dispatch session
• add executor coverage for dispatch vs new_per_run session behavior and fix the test imports after the qwenpaw package rename
• polish the cron jobs console by tightening the update payload contract, cleaning up remaining i18n gaps, fixing clipboard handling, and
  aligning form typing with actual form values

Test plan

• Run python tests/unit/app/test_cron_executor.py
• Create and edit cron jobs from the console page
• Verify dispatch vs new_per_run behavior for agent jobs
• Verify text jobs still send to the configured output session
• Verify weekly/custom cron display, tooltip text, and copy behavior in the jobs table
• Verify enable/disable and execute-now actions show the expected toasts

Notes

• agent jobs now distinguish between the execution session and the dispatch/output session
• console updates now always send the job id expected by PUT /cron/jobs/{job_id}
• this PR also cleans up follow-up issues found while reviewing the merged cron branch against current main

[github-actions]

Welcome to CoPaw! 🐾

Hi @cnyarx, this is your 2nd Pull Request.

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[gemini-code-assist]

Code Review

This pull request introduces an execution session strategy for cron jobs, allowing users to choose between reusing the output session context or starting a fresh session for each run. Key changes include the addition of execution session interfaces and models, updated UI components in the Job Drawer and table columns to support the new strategy, and backend logic in the cron executor to generate unique session IDs for the 'new_per_run' mode. A review comment suggests enhancing the frontend data processing by merging the execution object for future-proofing and using destructuring to maintain immutability when cleaning up request parameters.

[cnyarx]

已补齐这次 cron 分支的收尾修改，当前 PR 主要包含三部分：

1. 支持 cron agent 任务在 new_per_run 模式下为每次执行创建独立 execution session，同时仍将结果投递到配置的 dispatch/output session
2. 增加对应的 executor 测试覆盖，并修复 copaw -> qwenpaw 重命名后遗留的测试导入问题
3. 顺手修复了 cron 控制台页面的一些集成细节，包括：
   • 更新请求显式带上 id，与后端 PUT /cron/jobs/{job_id} 契约保持一致
   • 清理剩余硬编码文案，补齐中英文 i18n
   • 修复复制按钮里的 hook 使用方式
   • 收紧表单类型定义，使之和实际表单值结构一致

已本地验证：

• python tests/unit/app/test_cron_executor.py
• 前端UI：

有需要我再跟进补修。

[cnyarx]

处理了版本更新造成的冲突