chore: Standardize code, comments and docs on US-English spelling (#2707)

tests/card-controller/call/manager.test.ts

@@ -1373,8 +1373,8 @@ describe('answer', () => {
 
       expect(getRingtone().stop).toHaveBeenCalled();
 
-      // Timer was armed and should now be cancelled: advancing past the
-      // timeout must not end the (now-answered) call.
+      // Timer was armed and should now be canceled: advancing past the timeout
+      // must not end the (now-answered) call.
       vi.advanceTimersByTime(60_000);
       expect(manager.isActive()).toBe(true);
     } finally {

tests/card-controller/call/tones/custom.test.ts

@@ -12,8 +12,8 @@ interface AudioMocks {
 }
 
 // Uses real jsdom HTMLAudioElement instances and only stubs the parts jsdom
-// can't fulfil (`play()` / `pause()` -- no audio backend). Tests then exercise
-// observable behaviour: registered listeners fire via `dispatchEvent`, property
+// can't fulfill (`play()` / `pause()` -- no audio backend). Tests then exercise
+// observable behavior: registered listeners fire via `dispatchEvent`, property
 // writes round-trip on the element, etc.
 //
 // Called once at module load. The `beforeEach`/`afterEach` calls inside this

tests/card-controller/camera-triggers-manager.test.ts

@@ -538,7 +538,8 @@ describe('CameraTriggersManager', () => {
       vi.runOnlyPendingTimers();
       await flushPromises();
 
-      // Should still be triggered because the second 'new' event should have cancelled the first timer.
+      // Should still be triggered because the second 'new' event should have
+      // canceled the first timer.
       expect(manager.isTriggered()).toBeTruthy();
       expect(api.getViewManager().setViewDefaultWithNewQuery).not.toHaveBeenCalled();
     });

tests/card-controller/initialization/session-manager.test.ts

@@ -245,7 +245,7 @@ describe('SessionManager', () => {
     });
   });
 
-  // The user-facing behaviour the machine exists for, driven through the real
+  // The user-facing behavior the machine exists for, driven through the real
   // schema, trigger factory and evaluator rather than hand-written state.
   describe('should drive the initialized trigger', () => {
     it('should fire once per session and not when a session ends', () => {

tests/card-controller/issues/issue-manager.test.ts

@@ -873,7 +873,7 @@ describe('IssueManager', () => {
 
       // The attempt is now in flight: the problem is still unresolved
       // (needsRetry) but cannot be retried right now (canRetryNow). The running
-      // timer is cancelled and no further attempt fires, however long we wait.
+      // timer is canceled and no further attempt fires, however long we wait.
       canRetryNow.mockReturnValue(false);
       manager.evaluate();
       vi.advanceTimersByTime(RETRY_EXPONENTIAL_MAX_SECONDS * 1000);

tests/card-controller/issues/issues/media-unavailable.browser.test.ts

@@ -488,7 +488,7 @@ describe('MediaUnavailableIssue', () => {
 
     await card.events.waitForFirst('advanced-camera-card:issue:trigger');
 
-    // The status bar only summarises. Everything a user can do about the
+    // The status bar only summarizes. Everything a user can do about the
     // failure is behind it, which is the point of the issue report being
     // clickable.
     await card.clickControl(MEDIA_ISSUE_TITLE);

tests/card-controller/style-manager.browser.test.ts

@@ -7,9 +7,9 @@ import {
   createStillImageCardConfig,
 } from '../browser/test-utils';
 
-// A colour the dark theme sets and the card carries no other way. Reading it
-// back proves the stylesheet reached the card rather than merely compiling.
-// See src/scss/themes/dark.scss .
+// A color the dark theme sets and the card carries no other way. Reading it
+// back proves the stylesheet reached the card rather than merely compiling. See
+// src/scss/themes/dark.scss .
 const DARK_PRIMARY_BACKGROUND = '#111111';
 
 const mountThemed = async (themes: ThemeName[]) =>