List of required changes - advanced

[landscape82]

• Add real frequency/time axis labels (export sample rate instead of index-based ticks)
• Add loading and error states to the web viewer
• Investigate better UI
• Add stereo channel support (replace mono downmix)
• Refactor code for hosting (Vercel/Netlify???)
• Refactor tests for UI (unit and smoke)
• Refactor tests for code (unit and smoke)
• Investigate E2E tests
• Update documentation with dependencies and future improvments

Note: the project is still under active development. There is currently no proper UI or user-friendly workflow — using it requires manually running the Go generator script and then a separate Python HTTP server to view the output. This is worth keeping in mind when scoping the items above (especially UI investigation and hosting refactor).