APPROVE.

Nicely scoped: Drawer/InlineDrawer/OverlayDrawer gain a main snippet and pane-based resize with localStorageKey persistence, and the three call sites (TabHealth, TabPerformance, PipelineEditLayout) are updated consistently. Tests are targeted and meaningful — the InlineDrawer spec asserts the resize handle only appears when open (which is the whole point of the feature), the OverlayDrawer spec asserts the max-w-full cap and even guards with an innerWidth < 700 precondition so a wider CI viewport can't silently pass it. Commit is signed off with no AI trailers.

Two small comments (non-blocking):

• autoSaveId key naming. You've picked a good, consistent scheme (layout/pipelines/monitoringPanel/size, layout/drawer/pipelineHealth, etc.), but these live in localStorage forever once written. If any of these keys change name in the future, users will silently lose their layout. Worth a brief note somewhere (a comment in the layout file or a keys constants module) so we don't collide or rename them casually later.

• main snippet is now required in Drawer. The type declares it non-optional, which is correct for the new callers, but if any external/embedded consumer of Drawer (there don't appear to be any today, but it's a shared layout component) still passes only children they'll get a runtime blank pane. If you want a belt-and-braces default, main = () => null as unknown as Snippet would keep the old callers rendering — otherwise, current typing already catches it at build time, which is fine.

Manual test screencast plus browser-based specs is a good testing story for this kind of change; keep doing it.