v2.9.0

Changelog:

• docs: add codebase analysis and improvement notes (e8270ef)
• fix: code quality improvements (3af6c70)
• refactor: remove cover modification feature (07e8b69)
• feat: add content-based deduplication with file hashing (e866d01)
• Fix speed reader not pausing at closing quotes in dialogue (73c678d)

Signed APK: codex-v2.9.0.apk
SHA256: 7251d953421b1b23b49426aa163835702856e2593928c2d131f63838adcfdceb