Upgrade lottie-web-vue 2.0.7 → 3.0.1

# Upgrade lottie-web-vue 2.0.7 → 3.0.1 (major)

PR: https://github.com/FlowFuse/flowfuse/pull/8037

Dependabot opened a major bump for `lottie-web-vue`. Held from the weekly triage batch per major-bump policy — needs an owner and end-to-end verification.

## Risk assessment (low)

- Breaking change (lottie-web no longer bundled) only affects CDN `` consumers. FlowFuse is a bundler (webpack) user and already ships `lottie-web@5.12.2`, so this is a no-op for us.
- New `vue` peer dependency `^3.3.0` is satisfied by our `vue@^3.4.5`.
- No open advisories. Published via GitHub OIDC trusted-publishing with provenance (the "new releaser" is CI, not a compromised account).

## Verify before merging

- [ ] Named import `{ LottieAnimation }` in `frontend/src/main.js` still resolves — 3.x reworked the package exports (the changelog only promises the *default* import + `app.use()` plugin). Build the frontend and confirm `lottie-animation` registers and renders.
- [ ] Node engine: 3.x declares `engines.node: >=22`; repo declares `>=20.10.0`. No `engine-strict`, so Node 20 gives an EBADENGINE warning, not a failure. Fine on Node 24.

Start in frontend/src/main.js and inspect the named LottieAnimation import and registration. Update the dependency, build the frontend on Node 24, and confirm that lottie-animation registers and renders successfully with the 3.x package exports.

Written by the indexing model from the issue text.