The builders annotated their ``children`` parameter as
``list[HTMLTag] | HTMLTag | None`` where ``HTMLTag = str``. ``list[str]`` is
invariant, so passing ``list[Element]`` / ``list[Node]`` — the normal case —
was a type error everywhere a component nested children.
Introduce a proper child type in core:
Child = Node | str
Children = Sequence[Child] | str | None
``Sequence`` is covariant, so ``list[Element]`` / ``list[Node]`` are accepted;
``Child`` includes ``Node`` so node children are no longer rejected. ``Element``
itself also accepts a bare ``Node`` (it wraps one), typed ``Children | Node``.
Replace the ``list[HTMLTag] | HTMLTag | None`` annotations across primitives /
domain with ``Children``, and add ``as_children()`` to normalise a ``children``
argument to a ``list[Child]`` — retiring the repeated
``children if isinstance(children, list) else [children]`` dance that defeated
type narrowing. Inline ``mark_safe(...)`` SVG/markup children become ``Safe(...)``
nodes (a ``Node`` child instead of a stub-typed string).
Pyright on the component package drops from 43 to 22 errors; the remaining 22
are pre-existing and unrelated (django-stubs model access, the ``mark_safe``
``_Wrapped`` return type, and ``list[HTMLAttribute]`` attribute invariance).
Full suite green (443).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Cleanup of hacky leftovers from the node-tree migration (no behaviour
change):
- Return annotations: the component builders return Node subtrees, not
SafeText strings, but ~40 functions still declared `-> SafeText`. Correct
them to `-> Node` across filters / search_select / date_range_picker /
domain. The genuine string returners keep `-> SafeText`: the Alpine
selectors (GameStatusSelector / SessionDeviceSelector, which build f-string
markup) and the script-tag helpers (CsrfInput / ModuleScript /
ExternalScript / StaticScript).
- layout.render_page / layout.Page / AddForm now accept `Node` in their
`content` / `scripts` / `fields` parameters (TYPE_CHECKING import in
layout to avoid the components import cycle), matching what views already
pass.
- session._session_fields builds a `Fragment(*rows, separator="\n")` instead
of `mark_safe("\n".join(str(row) ...))` — keeps the tree intact so media
could bubble, per the Fragment convention.
- Inline SVG icon children use `Safe(...)` nodes instead of `mark_safe(...)`
strings (filters mode-toggle + collapse icons, date_range_picker calendar
icon).
- _filter_field reads the widget's own id from its node `.attributes`
(`_widget_id`) for the label's `for`, dropping the superfluous `for_widget`
argument that always rendered `for="None"`. Removes the two TODOs whose
premise ("the Component function can't expose the id") the class/node
refactor retired, plus RangeSlider's dead commented-out Label block.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
lukas
