1. Features
   - Add Auto-Submitted header to mail actions (automatic mail handling improvements).
   - Chat messages preview modal with backend support for message previews.
   - Chat widget updates: improved integration with third-party iframes, scroll-to-last-message on show, and refactor of widget internals.
   - Migration and build updates: Svelte 5 migration, Node 22 (bot/node) updates, and package upgrades.

2. Fixes
   - Do not mark our own responses as undelivered (prevents false undelivered status).
   - Ignore auto-submitted e-mails as new to avoid duplicate imports.
   - Fixes for issues reported (e.g. #2359, #2357) and improved error logging (#2347).
   - Various UI/UX fixes: React parsing issue, height flickering, trigger body object support, and trimmed/encoded URLs.
   - Mail handling: do not set custom from-email unless explicitly provided; set custom recipient handling improvements.

3. Performance & Reliability
   - Avoid loading/fetching message bodies when not required (reduce unnecessary DB/IO work).
   - Use static version cache for assets and additional cache improvements.
   - Check and respect rfc822 body presence before processing.

4. Compatibility & UX
   - Support for older browsers and related compatibility fallbacks.
   - UX improvements for canned messages dropdown and related interactions.

5. Chore/Dependencies
   - Dependency and package updates across frontend and backend (React/Node/bot tooling and other packages).
   - Miscellaneous maintenance: hashed payload handling, migration tweaks, and merge/cleanup commits.

For update just follow standard update procedure. For manual update it's update_344.sql

## What's Changed
**Full Changelog**: https://github.com/LiveHelperChat/livehelperchat/compare/4.76v...4.77v