chore: freeze themes

[HerrTopi]

chore(many): freeze Alert and Pill v2 against design tokens v1
Alert v2 and Pill v2 now resolve their component tokens from a frozen snapshot of design
tokens v1 instead of the live theme, so their styling stays put while the shared token set
keeps moving. Both pass frozenThemesDesignTokensV1 to withStyleNew and type themeOverride
against DesignTokensV1ComponentTypes.

For a frozen component, themeOverride.components now accepts either the frozen token shape
or the current one, but rejects a mix of the two. Keys from the wrong shape used to
typecheck and then get silently ignored at runtime.

Bumps @instructure/instructure-design-tokens from v1.5.0 to v1.9.0.

[github-actions]

PR Preview Action v1.8.1
Preview removed because the pull request was closed.
2026-10-02 00:16 UTC

[github-actions]

Visual regression report

Cypress suite: ✅ Passing

Visual diff: ⚠️ Changes detected.

Status	Count
Unchanged	71
Changed	28
New	0
Removed	0

Accessibility (axe): ✅ No violations.

📊 View full report — click a screenshot's ⚠ badge to see each violation boxed on the image, with the offending element named and contrast failures shown as color swatches.

Diff images (28)

alert-canvas.png — 753 pixels differ

alert-dark.png — 2385 pixels differ

alert-light.png — 2442 pixels differ

avatar-dark.png — 107 pixels differ

avatar-light.png — 107 pixels differ

badge-canvas.png — 1573 pixels differ

billboard-dark.png — 36899 pixels differ

billboard-light.png — 36841 pixels differ

colorpicker-dark.png — 50708 pixels differ

colorpicker-light.png — 39157 pixels differ

custom-icons-canvas.png — 565 pixels differ

custom-icons-dark.png — 498 pixels differ

custom-icons-light.png — 594 pixels differ

filedrop-dark.png — 6892 pixels differ

filedrop-light.png — 6957 pixels differ

heading-dark.png — 27544 pixels differ

heading-light.png — 27459 pixels differ

progressbar-canvas.png — 1661 pixels differ

progressbar-dark.png — 1672 pixels differ

progressbar-light.png — 1661 pixels differ

small-components-canvas.png — 85 pixels differ

small-components-dark.png — 319 pixels differ

small-components-light.png — 408 pixels differ

tooltip-dark.png — 84597 pixels differ

tooltip-light.png — 82455 pixels differ

view-canvas.png — 1088 pixels differ

view-dark.png — 2112 pixels differ

view-light.png — 2112 pixels differ

_{Baselines come from the visual-baselines branch. They refresh on every merge to master. The Cypress suite line covers the a11y and console-error assertions — a ❌ there means the suite found real issues even if the visual diff is clean.}

[matyasf]

• in withStyleNew line 165 is a crash if frozenTheme[themeKey] does not exist the code will crash a bit later when trying to access theme.newTheme.primitives
  maybe throw an error instead of console.error in line 156?
• A Select test is failing, I guess because of the new theme tokens? perhaps generalize that test?
  otherwise it looks good!

[joyenjoyer]

Either write a longer explanation comment or a docs page for this but otherwise looks nice

[joyenjoyer]

nice work