Convert all Chinese comments, docstrings, logger/print output,
HTTPException detail messages, and API response messages to English
across the entire codebase. Functional zh/ja localized strings
(e.g. prompt templates, timezone display names, date formats) are
preserved as-is.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The create_folder endpoint was incorrectly defined to accept query
parameters instead of JSON request body, causing 400 errors when
called from the frontend.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
