…labs#19725)

When user-controlled candidate values like "constructor" are used as
keys to look up values in plain objects (staticValues, plugin values,
modifiers, config), they can match inherited Object.prototype properties
instead of returning undefined. This caused crashes like "V.map is not
a function" when scanning source files containing strings like
"row-constructor".

Use Object.hasOwn() checks before all user-keyed object lookups in:
- utilities.ts (staticValues lookup)
- plugin-api.ts (values, modifiers, and variant values lookups)
- plugin-functions.ts (get() config traversal function)

Fixes tailwindlabs#19721

https://claude.ai/code/session_011CYSGw3DLh2Z8xnuyoaCgC

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Robin Malfait <malfait.robin@gmail.com>

…9730)

This PR ensures that interpolated expressions in Ruby syntax are
correctly extracted.

The issue was that we ignore comments in Ruby syntax (which start with
`#`). We already made an exception for locals (`<%# locals: … %>`), but
we also need to handle interpolated expressions (`#{ … }`) in the same
way because they are not comments.

Fixes: tailwindlabs#19728

## Test plan

1. Existing tests pass
2. Added a regression test for this scenario
3. Tested using the extractor on the given code snippet:

<img width="1461" height="1856" alt="image"
src="https://github.com/user-attachments/assets/b48f7042-ca9d-4133-87ae-4c37c633c073"
/>

Notice that the `w-100` gets extracted now.