[feature] Work Log Module with Export Function

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Summary

Add a dedicated work log module where team members can write daily logs, and administrators can view/export all logs collectively.

Core Features

Log Entry (for members)

• Write daily work logs including:
  • What was done today
  • Issues encountered
  • Plan for tomorrow
• Support log templates to keep formats consistent across the team

Log Overview (for admins/managers)

• View all members' logs in one place
• Filter by: date range / member / project
• Bulk export to CSV / PDF for reporting
• Calendar view showing who submitted logs on which day

Why should this be worked on?

Many teams, especially in research and lab environments, require daily or weekly work logs as part of their workflow. Currently Plane has no built-in way to do this — team members have to use workarounds:

• Task comments → not structured enough
• Pages → no export, no aggregation, hard to manage

This forces teams to maintain a separate tool (like ZenTao or Redmine) just for logging, which defeats the purpose of having a unified project management platform.

A native work log module with export capability would significantly increase Plane's value for teams that need structured daily reporting on top of task management.