Bug: Qwen TTS model selector state and download logic are mixed up — downloading 1.7B causes 0.6B to enter loading state and point to wrong address

[FireTable]

Description:
When the user clicks to download the Qwen TTS 1.7B model, the Qwen TTS 0.6B card also enters a \downloading\ (loading) state. Clicking on the Qwen TTS 0.6B card at this point actually triggers the Qwen TTS 1.7B operation instead. The issue persists after the download completes.

Steps to Reproduce:

1. Open Voicebox
2. Navigate to Model Nav
3. Click the download button for Qwen TTS 1.7B
4. Observe the Qwen TTS 0.6B card — it also shows a downloading/loading state
5. Click the Qwen TTS 0.6B card — it triggers the 1.7B operation instead of 0.6B
6. The issue persists after download completes

Expected Behavior:
Each model independently manages its own download state and operations without interference from others.

Video:

// model download

Jietu20260320-110828-HD.mp4

// downloaded

Environment:

• OS / Platform: macOS 26.3.1 (Apple Silicon Mac Studio M1 Ultra 64GB)
• Voicebox version: 0.3.0