Function applyLanguageGate

src/resolution/name-matcher.ts:189–197

* Drop cross-language candidates from a name lookup. Two regimes: * - `references` (type-usage): a type named in language X resolves to a * SAME-family type, never a coincidentally same-named symbol in another * language (the Android `BatteryManager` system class vs a JS one). Strict *

(candidates: Node[], ref: UnresolvedRef)

 *    both-known filter so `.vue`/`.svelte` (own tag) importing `.ts` survives.
 */
function applyLanguageGate(candidates: Node[], ref: UnresolvedRef): Node[] {
  if (ref.referenceKind === 'references' || ref.referenceKind === 'function_ref') {
    return candidates.filter((c) => sameLanguageFamily(c.language, ref.language));
  }
  if (ref.referenceKind === 'imports') {
    return candidates.filter((c) => !crossesKnownFamily(c.language, ref.language));
  }
  return candidates;
}

/**
 * Resolve a function-as-value reference (#756) — a function name used as a