Third call site that re-implemented the same .js→.ts rewrite in
isolation. Previously only handled the explicit .js→.ts case; bare
paths, multi-dot helper files, and alias-resolved dynamic imports
all dropped silently.
Now uses _resolve_js_module_path on both branches (relative and
alias) — same shape as the static-import and Svelte regex paths.
Real-world impact: TS files using `await import('./foo')` patterns
for code splitting (e.g. lazy-loading a profanity check) now produce
edges to the resolved target.