Add calibration summary export

frontend/src/components/detection/DetectionLab.tsx

@@ -571,7 +571,17 @@ export function DetectionLab({
                 <h3>Calibration run progress</h3>
                 <p className="muted">Each row is backed by a persisted detection run and QA check when successful.</p>
               </div>
-              <span className="count-pill">{detectionCalibrationRows.length} thresholds</span>
+              <div className="panel-action-row">
+                <span className="count-pill">{detectionCalibrationRows.length} thresholds</span>
+                <button
+                  className="secondary-action"
+                  type="button"
+                  onClick={() => downloadCalibrationSummary(selectedProjectId, detectionCalibrationRows)}
+                  disabled={detectionCalibrationRows.length === 0 || !selectedProjectId}
+                >
+                  Download calibration summary
+                </button>
+              </div>
             </div>
             <div className="table-scroll">
               <table>
@@ -940,6 +950,51 @@ function stringFromRecord(record: Record<string, unknown> | null | undefined, ke
   return typeof value === 'string' && value.trim().length > 0 ? value : null
 }
 
+function buildCalibrationSummaryExport(projectId: string, rows: DetectionCalibrationRunRow[]): Record<string, unknown> {
+  const successfulRows = rows.filter((row) => row.status === 'success')
+  return {
+    export_type: 'detection_calibration_summary',
+    project_id: projectId,
+    created_at: new Date().toISOString(),
+    calibration_thresholds: rows.map((row) => row.threshold),
+    quality_check_ids: successfulRows.map((row) => row.quality_check_id).filter(Boolean),
+    rows: rows.map((row) => ({
+      threshold: row.threshold,
+      status: row.status,
+      analysis_run_id: row.analysis_run_id ?? null,
+      job_id: row.job_id ?? null,
+      quality_check_id: row.quality_check_id ?? null,
+      evidence_geojson_url: row.quality_check_id
+        ? `/api/v1/projects/${projectId}/quality-checks/${row.quality_check_id}/evidence/geojson`
+        : null,
+      detection_count: row.detection_count ?? null,
+      precision: row.precision ?? null,
+      recall: row.recall ?? null,
+      f1_score: row.f1_score ?? null,
+      false_positives: row.false_positives ?? null,
+      false_negatives: row.false_negatives ?? null,
+      message: row.message ?? null,
+    })),
+  }
+}
+
+function downloadCalibrationSummary(projectId: string | null, rows: DetectionCalibrationRunRow[]): void {
+  if (!projectId || rows.length === 0) {
+    return
+  }
+  downloadJsonFile('detection-calibration-summary.json', buildCalibrationSummaryExport(projectId, rows))
+}
+
+function downloadJsonFile(filename: string, payload: unknown): void {
+  const blob = new Blob([JSON.stringify(payload, null, 2)], { type: 'application/json' })
+  const url = URL.createObjectURL(blob)
+  const link = document.createElement('a')
+  link.href = url
+  link.download = filename
+  link.click()
+  URL.revokeObjectURL(url)
+}
+
 function formatNullableNumber(value: number | null, digits: number): string {
   return typeof value === 'number' && Number.isFinite(value) ? value.toFixed(digits) : 'n/a'
 }

frontend/src/styles/app.css

@@ -3315,6 +3315,14 @@ button.entity-card {
   white-space: nowrap;
 }
 
+.panel-action-row {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  justify-content: flex-end;
+  gap: 0.5rem;
+}
+
 .calibration-summary-grid {
   display: grid;
   grid-template-columns: repeat(3, minmax(0, 1fr));