Windows: Audio preview broken + poor placement in Soundtrack panel

[walliai666]

Running on Windows, I hit two issues with the Soundtrack feature:

1. Audio preview fails to load (HTTP 403) — The /asset endpoint's path validation only matches forward slashes, but path.resolve() returns backslash paths on Windows, so the check always fails. Both AI-generated and manually registered audio assets can't play.

2. Audio preview placement is hard to notice — The preview player sits at the very bottom of the Soundtrack panel, far from the "Generate music" button. It should appear directly below each generate button instead.

I have fixes ready for both and would be happy to submit a PR.

[lefarcen]

Hi @walliai666 — thanks for the precise write-up. The Windows 403 makes sense from the current code path: /asset in packages/cli/src/studio-server.ts is checking for /.html-video/projects/, while path.resolve() on Windows yields backslash-separated paths, so preview audio would get rejected there.

The placement point also looks valid: the preview UI is currently rendered as one shared #st-preview block after both soundtrack sections, which makes it easy to miss after clicking either generate button. A PR for both fixes would be very welcome — keeping them together is fine if that’s the cleanest change. Please link this issue in the PR, and we’ll review from there.

[lefarcen]

If you'd like to pick this up, comment /claim and we can route the issue to you for a PR.
This looks like a good community fix for anyone already working on Windows support.

[walliai666]

/claim

[lefarcen]

Thanks for picking this up, @walliai666 — assigned to you now.
Roughly how long do you think it’ll take: a few hours, 1–3 days, about a week, or longer?

[walliai666]

@lefarcen about 1–3 days

[lefarcen]

Heads-up: PR #69 is now open for this. It implements both parts discussed here: normalizing Windows backslashes in the /asset path guard so soundtrack preview audio no longer 403s, and splitting the single shared preview area into separate music / narration preview blocks placed next to their respective generate actions.

Keeping this issue open until #69 lands, but the active implementation/review is now tracked there.

[lefarcen]

Hey @walliai666, last nudge on this one — if there’s no update by August 16, we’ll reopen it for the community. Any progress signal is enough to keep the claim.