fix(Tooltip): render above the overlay tier so tooltips aren't occlud…

…ed (#1153)

Tooltip content had no z-index, while Dropdown, Menu, ContextMenu and
DatePicker set `z-index: 1`. A tooltip whose trigger sits inside one of
those overlays (e.g. an EllipsisContent in a Dropdown) therefore rendered
behind it. Give tooltip content `z-index: 2` so it sits above that tier.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

feat(DateRangePicker): add allowOnlyDatesList prop to restrict select…

…able dates (#1146)

* feat(DateRangePicker): add allowOnlyDatesList prop to restrict selectable dates

* feat(DatePicker): simplify date restriction logic using isDateNotInAllowList

* feat(DatePicker): add tests for isDateNotInAllowList function and improve its implementation

* test(DatePicker): format isDateNotInAllowList test for better readability

test(datetimerangepicker): fix flaky visual test by pinning date (#1142)

Add Polaris logo (#1127)

Co-Authored-By: Claude Opus <noreply@anthropic.com>

fix(Flyout): remove container gap that doubled section spacing (#1102)

PR #1095 added a semicolon to the padding declaration, which activated a
previously-dead `gap` on FlyoutContent. Section spacing has always come
from the separators' own margins (Separator size), so the gap stacked on
top of those margins and doubled the spacing between the header, body,
and footer. Set the container gap to 0 so spacing matches the design.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

fix(Container): keep base styles overridable by styled-components (#1101

)

Since Container migrated to CSS Modules, its base `.container` rule began
beating equal-specificity `styled(Container)` overrides of layout properties
such as `padding` and `gap`. A downstream `styled(Flyout.Header)` padding
override (e.g. control-plane's sidebar header) was silently dropped, and
Flyout itself needed an `&&` specificity hack just to apply its own padding.

Scope the base rule with `:where(.container)` so it sits at zero specificity.
Modifier classes (`.container_padding_md`, …) and consumer overrides now win
naturally without a hack. Rendering is unchanged — modifier classes already
won over the base by source order. The temporary `&&` workaround in Flyout's
Element/Header/Footer is removed.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

fix(build): replace directory-based colocation of css.module files wi…

…th actual usage (#1100)

chore(new-icons): Add pin & unpin icons (#1066)

* Add pin icons

* Adjust pin icon scale

* Tune pin icon scale

* Add changeset for pin icons

* Update pin icons

fix(Icon): enlarge check glyph to fill its viewBox

The `check` glyph was small and offset within its 24x24 viewBox, so it
rendered noticeably smaller than other icons. Scale the path up ~1.25x
about the viewBox center; stroke weight stays at 2.

Render the Checkbox's check at 0.8rem (= 1rem / 1.25) so the checkmark
inside the box keeps its current size; the indeterminate (minus) icon is
unaffected.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

fix(Container): stop nested Container inheriting layout custom proper…

…ties

The CSS Modules migration forwards optional layout props (fillHeight, grow,
shrink, minHeight, maxHeight, overflow) to the DOM as CSS custom properties,
emitted inline only when the prop is set. Custom properties inherit by
default, so a nested Container that omits those props inherited its
ancestor's values — e.g. a layout root with `fillHeight` forced
`height: 100%` onto every descendant Container (observed as the control-plane
alert banner stretching to fill the viewport, with knock-on spacing breakage
throughout the page).

Reset these custom properties to `initial` on the base `.container` rule so a
declaration on the element wins over inheritance, and add `var()` fallbacks
matching the styled-components defaults. Verified in a browser: with the bug
a child Container inherited flex-grow:1/height:198px/overflow:hidden; after
the fix it hugs its content (flex-grow:0, height:34px, overflow:visible).

Adds a NestedInheritance story and a computed-style regression test; all 30
existing Container visual snapshots are unchanged.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>