Two gaps in TypeScript inheritance:
1. interface heritage is an extends_type_clause node, not class_heritage,
so the walker never saw it and interface extends produced no inherits
edge. Add an extends_type_clause branch reusing _ts_heritage_clause_entries
(handles multiple extends).
2. a same-file superclass has no import alias, so the use-fact resolver
(which only consulted the import table) dropped it; only imported bases
resolved. Add a same-file fallback against the file's own symbol_nodes,
scoped to inherits/implements so it does not duplicate same-file calls
that already resolve via the call-graph pass. Import resolution still
takes precedence.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Safi