refactor: 💡 change channel app state title & add alert msg

[lisbet-alvarez]

✅ Closes: https://hashicorp.atlassian.net/browse/ICU-11148

Description

slack thread for context
Add alert messages for api errors when failing to download recording.
Update app state title to be more generic.

Screenshots (if appropriate)

Screen.Recording.2024-09-12.at.2.16.18.PM.mov

How to Test

1. Create a session-recording
2. Modify any one of the session-recording files in the aws s3 storage bucket
3. Navigate to the session-recording channel
4. Attempt to play the recording and observe the error being displayed as an alert.

Checklist

• I have added before and after screenshots for UI changes
• I have added JSON response output for API changes
• I have added steps to reproduce and test for bug fixes in the description
• I have commented on my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works

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[DhariniJeeva]

looks great, left a non blocking comment

[cameronperera]

LGTM

[ZedLi]

Looks good!

[ZedLi]

Looks great!