add models constants and quick action defaults
migrate default model from deprecated gpt-4.1 to gpt-5-mini

extension: add parallel image upload capability to API client (3ce536f)
extension: enhance chat UI for image attachments and error reporting (60ca515)
extension: implement pre-upload image workflow in chat service (eb73def)
extension: improve screenshot quality and deprecate full-page capture (eb20dc5)
extension: update extension entrypoints and sidepanel with image support (34138c9)

Features
- disable model picker after chat starts and add session recovery retry logic (c5e7b73)
- insert pending text at cursor position instead of replacing draft (18cc61b)
- add dynamic backend URL configuration from storage (1f22e19)

Features
extension: add model search, pricing tiers, and account status display
extension: replace auth status badge with user avatar icon and tooltip
Refactoring
extension: add browser compatibility layer for Chrome/Firefox API differences
extension: add programmatic side panel opening with fallback for Firefox