v12.2.0 preview (Chrome Web Store review pending)

Preview build of v12.2.0 for users who want to test the new system audio capture before it hits the Chrome Web Store.

What's new

• Capture source dropdown in settings: switch between tab capture and microphone / system audio input, no window restart needed.
• Session-only default: always starts on Tab. Microphone is an opt-in per-session choice — no auto-prompt on window open, no soft lock-out if you ever pick "Never allow".
• Combined with OS audio routing (pavucontrol on Linux, Stereo Mix on Windows, BlackHole/Loopback on macOS), this visualizes any app's audio — Spotify, YouTube, games, everything. See the readme for per-platform routing steps.

Install (no terminal needed)

1. Download audiovisualizer-12.2.0-chrome.zip from this release.
2. Extract the zip — you'll get a chrome-mv3 folder.
3. Open chrome://extensions in Chrome.
4. Toggle Developer mode on (top-right corner).
5. Click Load unpacked and select the extracted chrome-mv3 folder.
6. Click the extension's action icon to open the visualizer.

Feedback welcome on issue #2.