* Add voice transcription feature to chat
Introduces voice recording and transcription in the chat window using Whisper models. Adds new components for voice recording and audio waveform visualization, updates feature flags and environment variables, and implements a server API endpoint for audio transcription.
* Fix frequencyData reactivity in VoiceRecorder
Replaces in-place mutation of frequencyData with assignment of a new Uint8Array to ensure Svelte reactivity in the voice visualization.
* Improve AudioWaveform visualization and responsiveness
Refactors AudioWaveform.svelte to use a timeline-based amplitude visualization with dynamic pill count based on container width, smoother animation, and responsive resizing. Updates VoiceRecorder.svelte to remove fixed pillCount and adjust maxHeight for better appearance. These changes provide a more accurate and visually appealing waveform display.
* Improve audio waveform and voice recorder UI
Reduced pill width and gap in AudioWavef…
