fix(mobile): keep the press transition to the press's own properties

`all` also sped up Run's mode colours, Stop's confirming state and the armed Ctrl key. The browser test now reads the transition at rest, since its 250ms hold would also pass the old 0.2s one.

test/phone-press-feedback.browser.test.ts

@@ -42,6 +42,12 @@ const TARGETS = [
 
 const PRESSED_SCALE = 'matrix(0.94, 0, 0, 0.94, 0, 0)';
 
+/** The press transition, read at rest: the 250ms hold below would also pass a slower one. */
+const PRESS_TRANSITION = {
+  property: 'transform, filter, background-color, border-color',
+  duration: '0.08s, 0.08s, 0.08s, 0.08s',
+};
+
 function toolbarMarkup(): string {
   const start = html.indexOf('<footer class="toolbar">');
   const end = html.indexOf('</footer>', start);
@@ -96,6 +102,10 @@ describe('phone toolbar and accessory press feedback in Chromium', () => {
     const read = () =>
       target.evaluate((el) => ({ transform: getComputedStyle(el).transform, filter: getComputedStyle(el).filter }));
     const rest = await read();
+    const transition = await target.evaluate((el) => ({
+      property: getComputedStyle(el).transitionProperty,
+      duration: getComputedStyle(el).transitionDuration,
+    }));
     await page.mouse.move(box.x + box.width / 2, box.y + box.height / 2);
     await page.mouse.down();
     await page.waitForTimeout(250);
@@ -104,7 +114,7 @@ describe('phone toolbar and accessory press feedback in Chromium', () => {
     await page.mouse.move(0, 0);
     await page.mouse.up();
     await page.waitForTimeout(250);
-    return { rest, held };
+    return { rest, held, transition };
   }
 
   for (const [skins, brightness] of [
@@ -120,6 +130,7 @@ describe('phone toolbar and accessory press feedback in Chromium', () => {
               name,
               rest: { transform: 'none', filter: 'none' },
               held: { transform: PRESSED_SCALE, filter: brightness },
+              transition: PRESS_TRANSITION,
             });
           }
         } finally {
@@ -140,6 +151,7 @@ describe('phone toolbar and accessory press feedback in Chromium', () => {
           name,
           rest: { transform: 'none', filter: 'none' },
           held: { transform: 'none', filter: brightness },
+          transition: PRESS_TRANSITION,
         });
       }
     } finally {