STYLE-005: ElementStyleSectionHost wraps ElementStyleSection with
SuggestionBanner. Uses useStyleSuggestions + executeSuggestionAction.
propertyeditor.ts updated to use host (drop-in, zero API change).
UBA-001: types.ts — Field discriminated union (8 types), BackendMetadata,
Section, Condition, ParseResult<T>. Zero external deps.
UBA-002: SchemaParser.ts validates pre-parsed objects against UBA v1.
Forward-compat: unknown field types/versions produce warnings not errors.
22 unit tests in tests/models/UBASchemaParser.test.ts.
Covers: hex/rgb color detection, spacing detection, variant candidate
threshold logic, toSuggestions ordering, stable IDs, edge cases.
Infra note: tests in tests/models/ — use 'npm run test:editor' not
'npx jest' directly (webpack build required by test-editor.ts script).
'npx jest' alone hangs on webpack. Move tests to tests/models/ not
tests/services/ — transform config only covers models/ path.