[madcodelife]

Summary

UI tests could not reach the search field of a searchable Select or the
input of a Combobox by id: the select makes its search field inside the
popup and the combobox makes its input inside its root, and testID names
only the component's own view. Tests had to find these fields by their
placeholder or screen reader label, which changes with the app's wording
and language.

This adds a test id for each of these parts, named after the part as its
other props are (searchClass / searchAccessibilityLabel,
inputClass / inputStyle):

• Select: searchTestID (Rust .search_test_id(..)) sets the search
  field's test id.
• Combobox: inputTestID (Rust .input_test_id(..)) sets the input's
  test id. The combobox has no separate search field; its input is the
  search.

Public API

• Select.searchTestID?: string / SelectProps::search_test_id: Prop<Option<SharedString>>
  (builder .search_test_id(..)): the id UI tests find the search field by.
• Combobox.inputTestID?: string / ComboboxProps::input_test_id: Prop<Option<SharedString>>
  (builder .input_test_id(..)): the id UI tests find the input by.

Validation

• nsh-base tests: new select::ui_tests_find_the_search_field_by_its_test_id
  and combobox::ui_tests_find_the_input_by_its_test_id find the field by
  id: and type into it; the select and combobox suites pass.
• Compat cases base-select and base-combobox set the new props and their
  script reaches the fields by id:.
• Docs: the Select and Combobox pages (English and zh-CN) and
  docs/dev/api-naming.md.
• cargo +nightly fmt --all, cargo clippy -p nsh-base --all-targets.

🤖 Generated with Claude Code