Claude/understand project purpose oy9 qc

[lingxiaobc]

PR Title

[PR]

Related Issue(s)

Motivation and Context

Summary of Changes

PR Type

• ✨ Enhancement
• 🐛 Bug Fix
• 📚 Documentation
• 🏗️ Refactor
• 🧪 Test
• 🧹 Chore

Breaking Changes

Contributor Checklist

• I have fully read and understood the CONTRIBUTING.md guide.
• I have performed a self-review of my own code.
• My changes follow the project's code style and guidelines
• I have linked the related issue(s) in the description above (if applicable)
• I have updated relevant documentation (if applicable)
• I have added necessary tests that prove my fix is effective or that my feature works (if applicable)
• All new and existing tests passed locally with my changes
• My changes generate no new warnings or errors
• I understand that due to limited maintainer resources, only small PRs are accepted. Suggestions with proof-of-concept patches are appreciated, and my patch may be rewritten if necessary.

Testing Instructions

Screenshots (if applicable)

Additional Notes

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Summary by cubic

Adds a ready-to-run Python script for translating PDFs with BabelDOC and a concise spec to build a simple web app that wraps it with progress and downloads. This makes it easy to test local translation and implement a FastAPI + SSE flow later.

• New Features
  • translate_pdf.py: Async PDF translation using babeldoc.format.pdf.high_level.async_translate with progress updates, QPS limiter, ONNX DocLayoutModel, and mono/dual PDF outputs (no watermark). Configurable paths, API base URL, key, model, and languages.
  • web_translate_prompt.md: End-to-end spec for a FastAPI + SSE app, including exact BabelDOC API usage, lifespan init, background tasks, 4 endpoints (/, POST /api/translate, GET /api/progress/{task_id}, GET /api/download/{task_id}/{file_type}), task cleanup, front-end layout/flow, and run steps.

^{Written for commit 45fea80. Summary will update on new commits.}

[cubic-dev-ai]

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