[Sianao]

Summary / 摘要

• Add the configured site base path to links in task details, so paths navigate correctly when OpenList is served under a subpath.

• Check user base paths at directory boundaries, so /team2/file is not treated as a path under /team.

• The shared path helper is used by copy, move, upload, offline transfer, and decompression tasks.

• This PR has breaking changes.

• This PR changes public API, config, storage format, or migration behavior.

• This PR requires corresponding changes in related repositories.

Testing / 测试

• Checked the patch with git diff --check.
• Ran ad hoc Node checks for site base paths and user path boundaries.
• Did not run a full frontend build or browser test; dependencies were not installed locally.
• go test ./... is not applicable to this frontend change.
• go test ./...
• Manual test / 手动测试:

Checklist / 检查清单

• I have read CONTRIBUTING.
• I confirm this contribution follows the repository license, contribution policy, and code of conduct.
• I have formatted the changed code with prettier where applicable.
• I have requested review from relevant maintainers or code owners where applicable.

AI Disclosure / AI 使用声明

• This PR includes AI-assisted content.

Tools used / 使用工具:

• Codex

Usage scope / 使用范围:

• Code generation / 代码生成

• Review assistance / 审查辅助

• I have reviewed and validated all AI-assisted content included in this PR.

• I have ensured that all AI-assisted commits include Co-Authored-By attribution.

• I can reproduce all AI-assisted content included in this PR without any AI tools.