intelExtractExports deduped export names with `if (!arr.includes(x)) arr.push(x)`
across ~8 extraction loops (one doubly-nested over an export block) — O(n^2).
Accumulate into Sets (add/has/size) and materialize to an array once at return.
Set dedups by value and preserves insertion order, so the returned export list
and its first-seen order are identical. Adds behavior-lock tests for dedup + order.
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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