feat: Add Telegram file/image support with vision, OCR, and document-to-context pipeline#31

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Copilot wants to merge 13 commits intomainfrom

copilot/add-telegram-file-image-support

Commits on Mar 25, 2026

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Copilot
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docs: add implementation plan for telegram file/image support with ocrs OCR

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chinkan
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feat: add file processing dependencies

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feat: add Attachment type to IncomingMessage

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feat: multi-modal ChatMessage content type

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feat: add vision support and OCR config

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fix: use to_string_lossy() in ocr test for UTF-8 safety

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feat: file processor module (image OCR/vision, PDF, DOCX)

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refactor: avoid double chars().count() in handle_context_length; add comment on pdf unwrap_or_default

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feat: telegram handler downloads photos and documents

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fix: use tokio::fs::remove_dir_all for async temp dir cleanup

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feat: agent processes file attachments

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test: add MessageContent serialization tests, fix clippy collapsible_match

Copilot
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chinkan
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