v0.119.0

## What's Changed
* docs(changelog): agent icons and colors with demo video by @mmabrouk in https://github.com/Agenta-AI/agenta/pull/6947
* [docs] Redesign the docs site frame, palette and components by @ashrafchowdury in https://github.com/Agenta-AI/agenta/pull/6948
* [docs] Centre the reading column on wide screens by @ashrafchowdury in https://github.com/Agenta-AI/agenta/pull/6954
* feat(api): route every outbound model and tool call through an Agenta gateway by @junaway in https://github.com/Agenta-AI/agenta/pull/6049
* [fix] Keep Pi retries silent and report failed turns by @mmabrouk in https://github.com/Agenta-AI/agenta/pull/6953
* [docs] Update API reference docs by @github-actions[bot] in https://github.com/Agenta-AI/agenta/pull/6943
* fix(runner): restore the turn output the gateway refusal check reads by @mmabrouk in https://github.com/Agenta-AI/agenta/pull/6962
* fix(frontend): restore the mobile tool catalog drawer by @mmabrouk in https://github.com/Agenta-AI/agenta/pull/6963
* docs(testing): say what a run against a remote deployment has to declare by @mmabrouk in https://github.com/Agenta-AI/agenta/pull/6971
* [docs] Centre the whole docs frame on wide screens by @ashrafchowdury in https://github.com/Agenta-AI/agenta/pull/6961
* test(services): retry a 404 that an HTML page proves came from another app by @mmabrouk in https://github.com/Agenta-AI/agenta/pull/6977
* docs(changelog): configuration history with demo video by @mmabrouk in https://github.com/Agenta-AI/agenta/pull/6975
* docs(changelog): voice input with demo video by @mmabrouk in https://github.com/Agenta-AI/agenta/pull/6974
* fix(hosting): let self-hosted MCP servers on plain HTTP and private networks work by default by @mmabrouk in https://github.com/Agenta-AI/agenta/pull/6984
* [release] v0.119.0 by @github-actions[bot] in https://github.com/Agenta-AI/agenta/pull/6955


**Full Changelog**: https://github.com/Agenta-AI/agenta/compare/v0.118.5...v0.119.0