[owjs3901]

Summary

• ResolverState::request runs before every JS resolver call. It parsed the importing file and ran a semantic build with nodes, just to find where the file references that one specifier (needed only if the resolver later fails). A file with k imports was parsed k extra times per extraction. Imported modules that get explored for constants, barrels or styled definitions paid the same again.
• original_module_references now indexes every specifier's locations in one parse, with one forward pass for line/column (before, each offset re-scanned the prefix). ResolverState keeps the index in a OnceCell per source for the life of the extraction.
• original_module_reference_locations keeps its signature and output, so all the existing location tests still pin the behaviour. Diagnostics are unchanged.

Measure

The large-app rows from #899 (each component imports from @devup-ui/react and ../tokens; each route imports from the barrel).

Test plan

• cargo test -p extractor module_reference (11, including a new multi-specifier index test)
• cargo test -p devup-ui-binding-core, cargo test -p devup-ui-wasm resolver
• cargo clippy --workspace --all-targets --all-features -D warnings
• CI (coverage 100%)

Refs #686

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Files with missing lines	Coverage Δ
libs/binding/src/resolver_state.rs	100.00% <100.00%> (ø)
libs/extractor/src/module_reference.rs	100.00% <100.00%> (ø)

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