[Bug]: Multiple Issues on Mobile Version

### Bug Description

When using OpenMAIC on mobile, several problems occur. Phone number registration shows an error, so I had to use email registration instead. Conversations sometimes do not appear after the teacher responds. Audio is delayed and loads much later than the text. The platform feels slow overall on mobile.

### Steps to Reproduce

1. Open OpenMAIC on mobile browser
2. Try registering with phone number
3. Start a classroom discussion with voice enabled
4. Wait for teacher response
5. Observe delayed audio and missing chats

### Expected Behavior

Phone registration should work correctly. Conversations should appear normally after the teacher responds. Audio should load at the same time as the text. The platform should feel smooth and responsiveness on mobile.

### Actual Behavior

Phone registration shows an error. Some conversations do not appear after the teacher responds. Audio is delayed and sometimes plays much later than the text. The website feels slow on mobile.

### Deployment Method

Other

### Browser

Chrome 147 on Android

### Operating System

Android

### Relevant Logs / Screenshots

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### Additional Context

_No response_