[cherry-pick] Enable automations by default (#336195)

Co-authored-by: vs-code-engineering[bot] <vs-code-engineering[bot]@users.noreply.github.com>

[cherry-pick] chat: Keep customization sections browsable (#335128)

Co-authored-by: Jessie Houghton <jehoughton@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Merged PR 759: Fix MSRC 134488

Validate media-loading sources while sanitizing chat Markdown, before the sanitized fragment is attached to a DOM node and can initiate a request.

Apply validation to source and poster attributes, reject network-backed file resources, and preserve the existing plaintext fallback and genuinely local file/data image support. Add focused sanitizer, Markdown renderer, and chat renderer regression coverage.

Issue: https://github.com/microsoft/vscode-internalbacklog/issues/8958
ICM: https://portal.microsofticm.com/imp/v5/incidents/details/31000000684891
CVE: CVE-2026-81380

Msrc-Case-Id: 134488

Refactor model capabilities (#334177)

* Updating default prompts

* fixing failed tests

* fixing failed tests

* version update

* default prompt update

* default prompt update

Engineering: create empty commit to trigger a new build (#333952)

Engineering - push empty commit to unblock stable build (#332552)

Empty commit

Agents - move section chevron to the left and reveal it on hover (#33…

…1545)

[cherry-pick] Adopt security fixes on main (#330350)

Co-authored-by: vs-code-engineering[bot] <vs-code-engineering[bot]@users.noreply.github.com>

Fix tests (#90)

Pre-seed Integrated Browser smoke settings to avoid the relaunch prom…

…pt (#328972)

Pre-seed browser smoke settings instead of writing them at runtime

Setting window.menuStyle through the settings editor made SettingsChangeRelauncher pop a modal 'restart to take effect' dialog on Windows/Linux, which blocked the workbench and broke the first test. Seeding both settings on disk before launch means the values are already in effect when the window opens, so no relaunch prompt appears.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>