Assistant checkpoint: Improve audio processing and error handling

Restored to 'bd2b5ab90c4df1aeb5db13439d47ab3d600c0f07'

Checkpoint before revert - Build the initial prototype

Agent query: Could you test the microphone functionality? Try clicking the mic button, speaking, and check if you receive an audio response.

Agent query: I'm having some trouble getting the speech recognition feature to work properly. Should I try a different speech recognition library that might be more compatible with our setup, or would you prefer me to keep troubleshooting this one?

Agent query: I've updated the app so that the AI model only loads when the CPU button is clicked. Could you verify if:

Agent query: I've updated the interface with camera and AI toggle buttons. Could you check if both buttons work correctly - the camera button should toggle the webcam on/off, and the AI button should toggle face detection?

Agent query: I've updated the interface to be fullscreen with floating camera controls and a CPU/AI status indicator. Could you check if the video is now fullscreen and if the controls are visible as floating icons?

Agent query: I've updated the face detection to show dashed rectangular boxes with corner markers instead of circles. The boxes should follow your face and be properly mirrored. Could you verify if this is working correctly?

Agent query: Can you check if the face detection is working now? The app should be running in CPU mode with detailed console logging to help diagnose any issues.

Agent query: I've fixed the face detection errors. Could you please check if the face detection is working smoothly now without any errors, and if the circles are being drawn correctly around detected faces?

Agent query: I've added database functionality to store face detection data. Could you test if the face detection is still working properly with the webcam?

Agent query: Can you access the webpage and see the webcam interface? Are you able to start the camera using the 'Start Camera' button and see the face detection working with blue circles around detected faces?

Checkpoint after starting plan

Initial commit