[ttktjmt]

Closes #181.

The build writes a scene's third-party LICENSE.<component> / NOTICE.<component> files beside it (ADR 0007), but the SPA showed none of them, and a static host lists no directory for it to look in.

Manifest

• A project gets work (its own LICENSE / NOTICE, relative to <project-id>/) and a scene gets credits (one entry per component, relative to the scene directory). Each license file is identified at build time: spdx, restriction, and its copyright line.
• A .glb skin's skin-<id> component carries skin: <id>; a VRM skin gets a vrm summary of its own meta (name, authors, license, other license URL). The file itself is bundled unmodified.
• Both keys are optional and an older engine ignores them, so format stays 7. A build without license files writes the same manifest as before.
• mjswan.license.copyright_line reads a license text's holder line, skipping template placeholders (Apache-2.0's appendix) and empty holders.

Viewer

• The About dialog gets two tabs. About keeps GitHub, Documentation, Platform and the contributors. Credits lists each component by its ID with an SPDX badge (and a restriction badge), its NOTICE in full, and its license text on demand; every skin of the scene, the one on screen first; the work's own license; and, last, the engine's own (LICENSE on demand, a link to THIRD_PARTY_LICENSES.md), so the tab is there for every scene. Texts are fetched when the tab opens or the License button is pressed.
• I opens and closes the About dialog, also with the panel hidden (?panel=0). The panel's logo gets a hover background; its tooltip is unchanged.
• The About tagline now reads "MuJoco Simulation on WebAssembly with Neural networks" (it said "Web Assembly" and "netwroks").
• mjswan/manifest exposes SceneEntry.credits and ProjectCatalog.work, so a host with its own UI can show them.

Follow-ups

• mjswan Cloud: ttktjmt/mjswan-cloud#114. Cloud ADR 0014 rejected a file list in the manifest because a license file corrected after publish would leave it stale; the issue asks Cloud to accept the keys and keep its license_files row as the source of truth.
• ADR 0007 still says the manifest is unchanged; no ADR was written for this change.

Testing

On the branch with #184 and #186 merged in:

• uv run pytest -m "not slow": 1178 passed. New tests cover copyright_line, the manifest listing exactly the files written, work, no keys without license files, and the skin entries (VRM 1.0, VRM 0.x, .glb).
• npx vitest run: 887 passed, including the catalog's credits / work and lazy text loading.
• ruff, tsc --noEmit, eslint src/: clean. ty and pyright report only existing diagnostics in files this change does not touch.
• Built a sample app with the SPA and drove it in Chromium: I opens About with and without ?panel=0, the Credits tab lists components, skins (on screen first), the work and the engine, License expands the full text (the engine's included), and the logo hover shows.

🤖 Generated with Claude Code

https://claude.ai/code/session_012oiM38cKjSAd9Bmn4Mwgiv

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