test(transitions): Improve test reliability for video loading

- Update tests to account for asynchronous video loading process
- Add waitForTimeout before verifying enabled state
- Implement wait mechanism to prevent flakiness, ensuring button is
  enabled before clicking

e2e/transitions.spec.ts

@@ -47,6 +47,7 @@ test.describe
     await youtubeLinkInput.fill(youtubeLink)
 
     await expect(timer).toHaveText('01:00:00')
+    await page.waitForTimeout(5000)
     await expect(startOrPauseOrResumeButton).toBeEnabled()
     await expect(startOrPauseOrResumeButton).toHaveText('Começar')
     await expect(resetButton).toBeDisabled()
@@ -65,6 +66,7 @@ test.describe
     await useAudioOrVideoFileInputButton.click()
 
     await expect(timer).toHaveText('01:00:00')
+    await page.waitForTimeout(5000)
     await expect(startOrPauseOrResumeButton).toBeEnabled()
     await expect(startOrPauseOrResumeButton).toHaveText('Começar')
     await expect(resetButton).toBeDisabled()
@@ -83,6 +85,7 @@ test.describe
     await useAudioOrVideoFileInputButton.click()
 
     await expect(timer).toHaveText('01:00:00')
+    await page.waitForTimeout(5000)
     await expect(startOrPauseOrResumeButton).toBeEnabled()
     await expect(startOrPauseOrResumeButton).toHaveText('Começar')
     await expect(resetButton).toBeDisabled()
@@ -118,6 +121,7 @@ test.describe
     await useAudioOrVideoFileInputButton.click()
 
     await expect(timer).toHaveText('01:00:00')
+    await page.waitForTimeout(5000)
     await expect(startOrPauseOrResumeButton).toBeEnabled()
     await expect(startOrPauseOrResumeButton).toHaveText('Começar')
     await expect(resetButton).toBeDisabled()
@@ -134,6 +138,7 @@ test.describe
     await youtubeLinkInput.fill(youtubeLink)
 
     await expect(timer).toHaveText('01:00:00')
+    await page.waitForTimeout(5000)
     await expect(startOrPauseOrResumeButton).toBeEnabled()
     await expect(startOrPauseOrResumeButton).toHaveText('Começar')
     await expect(resetButton).toBeDisabled()
@@ -152,6 +157,7 @@ test.describe
     await useAudioOrVideoFileInputButton.click()
 
     await expect(timer).toHaveText('01:00:00')
+    await page.waitForTimeout(5000)
     await expect(startOrPauseOrResumeButton).toBeEnabled()
     await expect(startOrPauseOrResumeButton).toHaveText('Começar')
     await expect(resetButton).toBeDisabled()
@@ -187,6 +193,7 @@ test.describe
     await useAudioOrVideoFileInputButton.click()
 
     await expect(timer).toHaveText('01:00:00')
+    await page.waitForTimeout(5000)
     await expect(startOrPauseOrResumeButton).toBeEnabled()
     await expect(startOrPauseOrResumeButton).toHaveText('Começar')
     await expect(resetButton).toBeDisabled()
@@ -203,6 +210,7 @@ test.describe
     await youtubeLinkInput.fill(youtubeLink)
 
     await expect(timer).toHaveText('01:00:00')
+    await page.waitForTimeout(5000)
     await expect(startOrPauseOrResumeButton).toBeEnabled()
     await expect(startOrPauseOrResumeButton).toHaveText('Começar')
     await expect(resetButton).toBeDisabled()
@@ -221,6 +229,7 @@ test.describe
     await useAudioOrVideoFileInputButton.click()
 
     await expect(timer).toHaveText('01:00:00')
+    await page.waitForTimeout(5000)
     await expect(startOrPauseOrResumeButton).toBeEnabled()
     await expect(startOrPauseOrResumeButton).toHaveText('Começar')
     await expect(resetButton).toBeDisabled()