Add AI lab run readiness panels

frontend/src/components/segmentation/SegmentationLab.tsx

@@ -88,6 +88,11 @@ export function SegmentationLab({
   onSelectReferenceDataset,
   onRunQa,
 }: SegmentationLabProps): JSX.Element {
+  const segmentationHasDataset = selectedSegmentationDatasetId.length > 0
+  const segmentationHasTileManifest = segmentationTileManifestPath.trim().length > 0
+  const segmentationRunReady =
+    Boolean(selectedProjectId) && segmentationHasDataset && selectedSegmentationModelConfigured
+
   return (
     <section className="workspace-panel ai-lab-shell segmentation-lab-shell">
       <div className="panel-title-row">
@@ -147,6 +152,38 @@ export function SegmentationLab({
       <div className="lab-block">
         <div className="ai-lab-run-surface" aria-label="Segmentation run controls">
           <h3>Run segmentation</h3>
+          <div
+            className={segmentationRunReady ? 'lab-readiness-panel lab-readiness-panel-ready' : 'lab-readiness-panel'}
+            aria-label="Segmentation run readiness"
+          >
+            <div className="ai-lab-section-header">
+              <div>
+                <h3>Run readiness</h3>
+                <p>Checks the selected raster and segmenter state before submitting a segmentation job.</p>
+              </div>
+              <span className={segmentationRunReady ? 'status-badge status-badge-ready' : 'status-badge'}>
+                {segmentationRunReady ? 'Ready to submit' : 'Blocked'}
+              </span>
+            </div>
+            <div className="lab-readiness-grid">
+              <div className={segmentationHasDataset ? 'lab-readiness-item lab-readiness-item-ready' : 'lab-readiness-item'}>
+                <span>Raster dataset</span>
+                <strong>{segmentationHasDataset ? 'Selected' : 'Select a raster dataset'}</strong>
+              </div>
+              <div className={selectedSegmentationModelConfigured ? 'lab-readiness-item lab-readiness-item-ready' : 'lab-readiness-item'}>
+                <span>Model availability</span>
+                <strong>
+                  {selectedSegmentationModelConfigured
+                    ? 'Selected model is configured'
+                    : selectedSegmentationModelLimitation ?? 'Select a configured segmentation model'}
+                </strong>
+              </div>
+              <div className={segmentationHasTileManifest ? 'lab-readiness-item lab-readiness-item-ready' : 'lab-readiness-item'}>
+                <span>Tile manifest</span>
+                <strong>{segmentationHasTileManifest ? 'Provided for provenance' : 'Optional for the fixture segmenter'}</strong>
+              </div>
+            </div>
+          </div>
           {rasterDatasets.length === 0 ? (
             <div className="result-state result-state-empty">
               <strong>No raster datasets available for segmentation.</strong>