Product Requirements Document: Team Collaboration Hub

## Problem Statement
Teams currently face challenges in collaborating effectively on projects due to:
- Use of multiple disparate tools
- Difficulty tracking responsibilities and progress
- Scattered information across various platforms

## User Stories
- As a team member, I want a single hub to see all active projects, so I can easily find relevant information and updates.
- As a project manager, I need to assign tasks and track their progress centrally, so I understand the status at a glance.
- As an external partner, I need clear access controls, so I only see information relevant to my contribution.
- As a team lead, I want to view collaboration metrics, so I can assess engagement and resource allocation.

## Acceptance Criteria
- Users can access all project information from one dashboard.
- Task assignment and progress tracking are included.
- Information is searchable and organized by team/project.
- Access controls for internal/external users are configurable.
- Collaboration metrics are visible to managers and team leads.

## Technical Considerations
- Integration with existing tools (e.g., calendar, document storage, communication platforms)
- Scalable architecture to support future external partners
- Secure authentication and authorization mechanisms
- Mobile and desktop compatibility

## Success Metrics
- Reduction in time spent searching for information
- Increase in number of tasks managed and completed via the hub
- Positive user feedback (surveys, NPS)
- Adoption rate across internal teams
- Decreased use of non-integrated third-party tools

该 issue 指出了一个范围广泛的 collaboration hub 产品，但没有列出任何 repository 文件、测试或入口点。首先定位负责产品需求的项目区域，然后确认 dashboard、任务跟踪、访问控制、搜索或指标范围中的哪一部分已获批准，可以开始实现。完成标准目前尚未映射到现有代码或测试。

由索引模型根据 Issue 内容生成。