Results header can report more mapped than inputs ("11 out of 10 mapped") #47

With the example inputs, the results header shows Results (11 out of 10 mapped).

Cause: frontend/src/pages/Home.tsx:33 computes mappedCount by counting result rows with mappingConfidence >= 0.9:

const mappedCount = useMemo(() => resultsRef.current.filter(r => parseFloat(r.mappingConfidence) >= 0.9).length, [resultsVersion])

but resultsRef.current holds one row per annotation, and a single input property can yield several rows (multiple candidate terms). The denominator at line 556 is lastSearchParams.properties.length — the number of distinct inputs — so any input with two or more high-confidence annotations pushes the numerator past the denominator.

Fix: count distinct mapped inputs instead of rows, e.g.

const mappedCount = useMemo(
  () => new Set(
    resultsRef.current
      .filter(r => parseFloat(r.mappingConfidence) >= 0.9)
      .map(r => r.textToMap)
  ).size,
  [resultsVersion])

(textToMap is the input-property column used for the TSV export at line 291; if inputs can repeat with different propertyType, key the set on textToMap + '\t' + r.propertyType instead.)

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