fix(project): can only generate 1 spine file (and many bugs etc)

[Moskize91]

No description provided.

[Copilot]

Pull Request Overview

This PR refactors spine processing to support a single spine file, enhances chunk translation flow with better caching and error handling, updates the storage format for cached translations, and includes the target language in chunk hashing.

• Consolidate spine file handling into a single tuple (spine) and adjust read/write logic.
• Streamline future-based translation with a generator and add length checks for cached chunks.
• Change cache storage to use simple newline splitting and drop whitespace cleaning.
• Incorporate target_language into the hashing routine to avoid cross-language collisions.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

File	Description
epub_translator/translator.py	Refactored _translate_spine to use a single spine tuple for read/write logic
epub_translator/translation/translation.py	Added _generate_chunks_from_futures, length mismatch warning in _translate_chunk
epub_translator/translation/store.py	Switched to file.read().split("\n") and removed clean_spaces on write
epub_translator/translation/chunk.py	Updated _hash_texts_list signature to include target_language

Comments suppressed due to low confidence (1)

epub_translator/translation/chunk.py:48

• [nitpick] Using the variable name hash shadows the built-in function. Consider renaming to digest or chunk_hash to avoid confusion.

    hash = _hash_texts_list(target_language, (head, body, tail))