הורדת Session 1.18.3

Release Overview
- Patch release with two bug fixes and dependency updates
Other Changes
- Update libsession-util-nodejs to v0.7.5 https://github.com/session-foundation/session-desktop/pull/2036
- Build with Node 24.22.1 for the October 2026 security release https://github.com/session-foundation/session-desktop/pull/2035
- Stop pnpm install recursing after a build https://github.com/session-foundation/session-desktop/pull/2037
Bug Fixes
- Save attachments from the media gallery and file list https://github.com/session-foundation/session-desktop/pull/2030
- Keep an emptied last line in the message input instead of deleting it https://github.com/session-foundation/session-desktop/pull/2041