Merge pull request #266 from Taewan-P/codex/groq-thinking-support

Remove unused imports in test files

Optimize imports

fix: address Groq PR feedback

Merge branch 'main' into codex/groq-thinking-support

fix: add Groq thinking support

Update GitHub Actions to use newer action versions

Update checkout action to version 6

Upgrade GitHub Actions to latest versions

Upgrade actions/checkout to version 6

Update app version

Update serena memory

feat(chat): use persisted attachments in send flow

feat(api): add provider file upload references

feat(db): persist chat attachments in room