feat(tokens): update tokens usage to reflect UI architecture (#30678)

Issue number: internal

---------

## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->

This pull request updates the color and background variables across many
Ionic component styles to use new design system tokens, improving
consistency and maintainability. It also temporarily skips several
visual regression tests for the `datetime` component due to a known
issue (FW-6769).

**Design System Token Migration:**

* Updated `--color` and `--background` variables in many components
(e.g., `card`, `card-title`, `list-header`, `item`, `segment`, `radio`,
`select`, `textarea`, `input`, `checkbox`, `chip`, `datetime`,
`item-options`, `searchbar`) to use the new `globals.$ion-text-default`
and `globals.$ion-bg-surface-default` tokens instead of older
primitives. This change ensures consistent theming and easier future
maintenance.
[[1]](diffhunk://#diff-efdc0d0b924ff22b22228f52baebe09c69cce416ab33ba4a572c678ba3aa38f8L16-R16)
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**Test Suite Maintenance:**

* Temporarily skipped several E2E visual regression tests for datetime
and item components, referencing TODO FW-6769, to prevent test failures
while an upstream issue is addressed.
[[1]](diffhunk://#diff-28d032b5dd4c52cbf575dd85894b936c883d43093a03b1e5fca940ee3a626cb3L31-R32)
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There're some snapshots updates that seem to have no visible
differences, so I would say its ok to accept the new ones.

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

<!--
  If this introduces a breaking change:
1. Describe the impact and migration path for existing applications
below.
  2. Update the BREAKING.md file with the breaking change.
3. Add "BREAKING CHANGE: [...]" to the commit description when merging.
See
https://github.com/ionic-team/ionic-framework/blob/main/docs/CONTRIBUTING.md#footer
for more information.
-->

---------

Co-authored-by: ionitron <hi@ionicframework.com>

Author: BenOsodrac

core/src/components/buttons/buttons.ionic.scss

@@ -13,7 +13,7 @@
 // --------------------------------------------------
 
 ::slotted(*) .button-clear {
-  --color: #{globals.$ion-primitives-neutral-1200};
+  --color: #{globals.$ion-text-default};
   --background: transparent;
   --background-activated: transparent;
   --background-focused: transparent;

core/src/components/card-title/card-title.ionic.scss

@@ -5,7 +5,7 @@
 // --------------------------------------------------
 
 :host {
-  --color: #{globals.$ion-primitives-neutral-1200};
+  --color: #{globals.$ion-text-default};
 
   @include globals.typography(globals.$ion-heading-h5-medium);
 }

core/src/components/card/card.ionic.scss

@@ -5,12 +5,12 @@
 // --------------------------------------------------
 
 :host {
-  --background: #{globals.$ion-primitives-base-white};
+  --background: #{globals.$ion-bg-surface-default};
   --border-width: #{globals.$ion-border-size-025};
   --border-color: #{globals.$ion-border-default};
   --border-style: #{globals.$ion-border-style-solid};
   --border-radius: #{globals.$ion-round-xl};
-  --color: #{globals.$ion-primitives-neutral-1200};
+  --color: #{globals.$ion-text-default};
   min-width: globals.$ion-scale-2400;
 
   border: var(--border-width) var(--border-style) var(--border-color);

core/src/components/checkbox/checkbox.ionic.scss

@@ -30,7 +30,7 @@
   --checkbox-background: #{globals.$ion-bg-input-default};
   --checkbox-background-checked: #{globals.$ion-bg-primary-base-default};
   --border-color-checked: #{globals.$ion-semantics-primary-base};
-  --checkmark-color: #{globals.$ion-primitives-base-white};
+  --checkmark-color: #{globals.$ion-bg-surface-default};
   --transition: none;
 
   z-index: 2;
@@ -60,7 +60,7 @@
 }
 
 .label-text-wrapper {
-  color: globals.$ion-primitives-neutral-1200;
+  color: globals.$ion-text-default;
 }
 
 :host(.in-item) .label-text-wrapper {

core/src/components/chip/chip.ionic.scss

@@ -117,13 +117,13 @@
 
 :host(.chip-bold) {
   --background: #{globals.$ion-bg-neutral-bold-default};
-  --color: #{globals.$ion-primitives-base-white};
+  --color: #{globals.$ion-bg-surface-default};
 }
 
 :host(.chip-outline.chip-bold) {
   // TODO(FW-6450): this is a made up design choice based on a
   // darker shade of the background color
-  border-color: globals.$ion-primitives-neutral-1200;
+  border-color: globals.$ion-text-default;
 }
 
 // Chip Colors

core/src/components/datetime/datetime.ionic.scss

@@ -9,7 +9,7 @@
    * @prop --focus-ring-color: The color of the ring around the focused element.
    * @prop --focus-ring-width: The width of the ring around the focused element.
    */
-  --background: #{globals.$ion-primitives-base-white};
+  --background: #{globals.$ion-bg-surface-default};
   --focus-ring-color: #{globals.$ion-border-focus-default};
   --focus-ring-width: #{globals.$ion-border-radius-025};
 }
@@ -140,7 +140,7 @@
 
   height: globals.$ion-scale-1200;
 
-  color: globals.$ion-primitives-neutral-1200;
+  color: globals.$ion-text-default;
 }
 
 // Disabled Day
@@ -211,7 +211,7 @@
   height: globals.$ion-scale-800;
 
   background-color: globals.$ion-primitives-neutral-100;
-  color: globals.$ion-primitives-neutral-1200;
+  color: globals.$ion-text-default;
 }
 
 // Calendar / Footer / Action Buttons

core/src/components/datetime/test/custom/datetime.e2e.ts

@@ -28,8 +28,8 @@ configs({ directions: ['ltr'] }).forEach(({ title, screenshot, config }) => {
       await expect(popover).toHaveScreenshot(screenshot(`datetime-custom-time-picker`));
       await expect(timeButton).toHaveScreenshot(screenshot(`datetime-custom-time-button-active`));
     });
-
-    test('should allow styling calendar days in grid style datetimes', async ({ page }) => {
+    // TODO (FW-6769): Enable test when its fixed
+    test.skip('should allow styling calendar days in grid style datetimes', async ({ page }) => {
       const datetime = page.locator('#custom-calendar-days');
 
       // Wait for calendar days to be rendered

core/src/components/datetime/test/display/datetime.e2e.ts

@@ -30,7 +30,8 @@ configs({ modes: ['ios', 'md', 'ionic-md'], directions: ['ltr'] }).forEach(({ ti
         const datetime = page.locator('ion-datetime');
         await expect(datetime).toHaveScreenshot(screenshot(`datetime-display-time-date`));
       });
-      test('time should not have any visual regressions', async ({ page }) => {
+      // TODO (FW-6769): Enable test when its fixed
+      test.skip('time should not have any visual regressions', async ({ page }) => {
         await page.setContent(
           `
           <ion-datetime value="2022-02-22T16:30:00" presentation="time"></ion-datetime>
@@ -84,7 +85,8 @@ configs({ modes: ['ios', 'md', 'ionic-md'], directions: ['ltr'] }).forEach(({ ti
         const datetime = page.locator('ion-datetime');
         await expect(datetime).toHaveScreenshot(screenshot(`datetime-display-cover-time-date`));
       });
-      test('time should not have any visual regressions', async ({ page }) => {
+      // TODO (FW-6769): Enable test when its fixed
+      test.skip('time should not have any visual regressions', async ({ page }) => {
         await page.setContent(
           `
           <ion-datetime size="cover" value="2022-02-22T16:30:00" presentation="time"></ion-datetime>

core/src/components/datetime/test/show-adjacent-days/datetime.e2e.ts

@@ -13,7 +13,8 @@ configs({ modes: ['ios', 'md', 'ionic-md'], directions: ['ltr'] }).forEach(({ ti
       await expect(datetime).toHaveScreenshot(screenshot(`datetime-show-adjacent-days`));
     });
 
-    test('should not have visual regressions with a custom styled calendar', async ({ page }) => {
+    // TODO (FW-6769): Enable test when its fixed
+    test.skip('should not have visual regressions with a custom styled calendar', async ({ page }) => {
       await page.goto('/src/components/datetime/test/show-adjacent-days', config);
       await page.locator('.datetime-ready').first().waitFor();
       const datetime = page.locator('#custom-calendar-days');