surface the new analysis caveats in the workbench

The backend now says when a result covers a different area than was drawn, or
when a score belongs to one confidence cut only. None of that helps an
operator while it stays in the response body.

- the raster selection adapters carry the model-coverage and widened-cell
  warnings into the map panel and mark the result an estimate when either
  applies, so an existing warning slot renders them;
- the map workspace shows the selection-edge disclosure next to the object
  count;
- the detection panel shows average precision and the F1-optimal threshold
  beside the single-threshold figures, and the box-versus-footprint
  interpretation when candidates are detector boxes.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

frontend/src/components/map/MapWorkspace.tsx

@@ -2957,6 +2957,9 @@ export function MapWorkspace({
                 {analysisMode === 'current' && activeSelectionResult?.truncated ? (
                   <p className="geo-data-notice">De telling is volledig; op de kaart en in de tabel worden maximaal {activeSelectionResult.limit.toLocaleString('nl-BE')} objecten getoond.</p>
                 ) : null}
+                {analysisMode === 'current' && activeSelectionResult?.summary?.selection_edge_warning ? (
+                  <p className="geo-data-notice">{activeSelectionResult.summary.selection_edge_warning}</p>
+                ) : null}
                 {analysisMode === 'current' && activeSelectionResult?.summary?.warning ? (
                   <p className="geo-data-notice">{activeSelectionResult.summary.warning}</p>
                 ) : null}