[anton-gor-dev]

Summary

• Closes DevTools: surface composables in the standard Components inspector panel #33
• Injects a "Composables" group into the State view of Vue Devtools' built-in Components inspector for any component that directly uses composables, listing each composable's current state alongside its own setup/props/data — no need to switch to a separate Composables tab to see what a component is using.
• Works around two quirks of @vue/devtools-kit's built-in components plugin:
  • it overwrites payload.state wholesale (payload.state = result) rather than merging — worked around by deferring our getInspectorState merge by one microtask (await Promise.resolve()) so it always runs after the core handler's synchronous assignment, regardless of hook registration order;
  • it renders State as a flat list of entries grouped visually by each entry's type field (e.g. setup, props) rather than by named top-level groups — worked around by appending entries with type: 'Composables' to that list instead of adding a new top-level key (the same technique Pinia/Vue Router use).
• Also handles the app root node, whose nodeId Vue Devtools encodes as ${appId}:root rather than a numeric uid — the root's instance.uid (and the component.uid recorded by trackComposable) is always 0.

Test plan

• pnpm vitest run packages/plugin — 19/19 passing
• pnpm lint
• pnpm plugin:build
• Verified live in the playground: selecting App or DemoWidget in Vue Devtools' Components panel now shows a "Composables" group listing each composable's state next to "setup"