* chore: simplify process_effects

* return effects

* first impl of $$uid

* fix

* $props.id()

* fix errors

* rename $.create_uid() into $.props_id()

* fix message

* relax const requirement, validate assignments instead

* oops

* simplify

* non-constants should be lowercased

* ditto

* start at 1

* add docs

* changeset

* add test

* add docs

* doc : add code example

* fix type reported by bennymi

---------

Co-authored-by: Rich Harris <rich.harris@vercel.com>

* set value/checked by JS

* test

* changeset

* fix test form-default-value-spread

- `$derived` can contain `$state` declarations so we cannot ignore them, so this reverts #14533
- instead, we add equality checks to not do this expensive work unnecessarily
- this also adds a render effect similar to the class ownership addition when it detects a getter on a POJO during ownership addition

fixes #15164

* fix: use `importNode` to clone templates for Firefox

* fix: move `is_firefox` check to line 28

* fix: revert using `is_firefox` too soon

…f derived state (#15276)

Fixes #15273

Also make sure events dispatched via transition/animation logic runs outside event context

Related to #15262

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>