[ashley-hunter]

Summary

Partial declarations can reach the linker with their strings written as template literals. esbuild, for example, rewrites strings containing quotes or newlines to backticks, which most CSS does:

i0.ɵɵngDeclareComponent({ ..., styles: [`.a {
  content: "x";
}`] })

Previously the linker only read StringLiteral values in these places, so:

• styles entries were dropped, and with no styles left the component's encapsulation was downgraded from Emulated to None.
• Host properties and listeners were dropped, so their bindings were never emitted.

The build succeeded with no warning, and the problem only showed up as missing styling or behaviour at runtime.

Changes

• Extract as_static_string from get_string_property: it accepts a string literal, or a template literal with no substitutions (using its cooked value).
• Use it for styles entries and for host properties/listeners values.
• Aliased inputs x: [pub, prop] are now recognised as declaration format, so the [InputFlags, ...] element is inserted; previously the array was passed through verbatim and the runtime read the public name as InputFlags.
• deps: invalid`` now selects the ɵɵinvalidFactory() path like the quoted form.
• host.attributes static-string values are emitted cooked and quoted, and attribute keys / input publicName/classPropertyName go through escape_string.
• The styles loop uses as_expression() so an array elision can't panic it.
• Template literals with ${...} substitutions are still skipped.

Tests

• test_link_styles_template_literal_matches_string_literal: backtick and quoted styles link to byte-identical output, including a case with escape sequences.
• test_link_host_bindings_template_literal_matches_string_literal: same for host properties and listeners.
• test_link_host_attributes_template_literal_matches_string_literal: cooked template-literal attribute values produce byte-identical hostAttrs.
• test_link_inputs_template_literal_matches_string_literal: simple, aliased-array, and object input forms all survive the rewrite.
• test_link_factory_invalid_deps_template_literal: deps: invalid`` emits ɵɵinvalidFactory.
• Both original tests failed before the fix.
• Checked end to end through the napi binding: the linked output for the backtick form is identical to the quoted form, and the quoted form matches @angular/compiler-cli 21.2.6's linker output.
• Local runs: cargo test, conformance (1264/1264, snapshot unchanged), pnpm test (374/374), pnpm check, compare fixtures (979/979) and Playwright e2e (37/37).