fix(tiptap): preserve array/object component props in normalizeProps

[hendrikheil]

Summary

• normalizeProps in src/app/src/utils/tiptap/props.ts was calling String(value).trim() on every prop value, turning arrays of objects (e.g. YAML authorsOne: [{name: 'John', role: 'contributor'}]) into "[object Object],[object Object]" during the comark → Tiptap → comark round-trip
• Fix adds a type guard to pass object, array, and null values through unchanged; primitives are still stringified as before
• Updated createParagraphElement parameter type to match the widened return type

Fixes #457.

Reproduction

Open the docus playground on main and edit the /authors page in Studio — saving the page will corrupt the YAML array-of-objects props to inline JSON.

Root cause

When a component uses YAML block props with array-of-object values:

::authors
---
authorsOne:
  - name: John Doe
    role: contributor
---
::

The round-trip through the Studio editor would destroy the arrays, serialising them to inline JSON props instead of preserving the YAML block format.

Test plan

• Unit tests added for normalizeProps covering array-of-objects, plain objects, array-of-primitives, null, and className
• Integration test added for full comark→tiptap→comark→markdown round-trip with YAML array-of-objects props
• All 342 tests pass

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[pkg-pr-new]

npm i https://pkg.pr.new/nuxt-studio@477

commit: 10f9c9c