Add AI lab action guardrails

frontend/src/components/detection/DetectionLab.tsx

@@ -89,10 +89,24 @@ export function DetectionLab({
   const detectionHasDataset = selectedDetectionDatasetId.length > 0
   const detectionHasModel = selectedDetectionModel !== null
   const detectionModelReady = Boolean(selectedDetectionModel?.configured)
+  const detectionModelUiRunnable = detectionModelReady && selectedDetectionModelId !== 'manual-fixture-detector'
   const detectionHasTileManifest =
     !detectionRequiresTileManifest || detectionTileManifestPath.trim().length > 0
   const detectionRunReady =
-    Boolean(selectedProjectId) && detectionHasDataset && detectionHasModel && detectionModelReady && detectionHasTileManifest
+    Boolean(selectedProjectId) && detectionHasDataset && detectionHasModel && detectionModelUiRunnable && detectionHasTileManifest
+  const detectionRunBlockedReason = !selectedProjectId
+    ? 'Select or create a project first'
+    : !detectionHasDataset
+      ? 'Select a raster dataset'
+      : !detectionHasModel
+        ? 'Select a detection model'
+        : selectedDetectionModelId === 'manual-fixture-detector'
+          ? 'Fixture model is explicit test/demo-only'
+          : !detectionModelReady
+            ? selectedDetectionModel?.limitation_message ?? 'Selected model is not configured'
+            : !detectionHasTileManifest
+              ? 'Provide a raster tile manifest for configured YOLO'
+              : null
 
   return (
     <section className="workspace-panel ai-lab-shell detection-lab-shell">
@@ -191,6 +205,10 @@ export function DetectionLab({
               </div>
             </div>
           </div>
+          <div className={detectionRunReady ? 'lab-action-guardrail lab-action-guardrail-ready' : 'lab-action-guardrail'}>
+            <span>Run action</span>
+            <strong>{detectionRunReady ? 'Ready to submit a detection job' : detectionRunBlockedReason}</strong>
+          </div>
           {rasterDatasets.length === 0 ? (
             <div className="result-state result-state-empty">
               <strong>No raster datasets available for detection.</strong>
@@ -242,7 +260,7 @@ export function DetectionLab({
               />
             </label>
           ) : null}
-          <button className="primary-action" type="button" onClick={onRunDetection} disabled={runningDetection || !selectedProjectId || rasterDatasets.length === 0}>
+          <button className="primary-action" type="button" onClick={onRunDetection} disabled={runningDetection || !detectionRunReady}>
             Run detection
           </button>
         </div>

frontend/src/components/segmentation/SegmentationLab.tsx

@@ -90,8 +90,19 @@ export function SegmentationLab({
 }: SegmentationLabProps): JSX.Element {
   const segmentationHasDataset = selectedSegmentationDatasetId.length > 0
   const segmentationHasTileManifest = segmentationTileManifestPath.trim().length > 0
+  const segmentationModelUiRunnable =
+    selectedSegmentationModelConfigured && selectedSegmentationModelId !== 'fixture-segmenter'
   const segmentationRunReady =
-    Boolean(selectedProjectId) && segmentationHasDataset && selectedSegmentationModelConfigured
+    Boolean(selectedProjectId) && segmentationHasDataset && segmentationModelUiRunnable
+  const segmentationRunBlockedReason = !selectedProjectId
+    ? 'Select or create a project first'
+    : !segmentationHasDataset
+      ? 'Select a raster dataset'
+      : selectedSegmentationModelId === 'fixture-segmenter'
+        ? 'Fixture segmenter is explicit test/demo-only'
+        : !selectedSegmentationModelConfigured
+          ? selectedSegmentationModelLimitation ?? 'Selected segmentation model is not configured'
+          : null
 
   return (
     <section className="workspace-panel ai-lab-shell segmentation-lab-shell">
@@ -184,6 +195,10 @@ export function SegmentationLab({
               </div>
             </div>
           </div>
+          <div className={segmentationRunReady ? 'lab-action-guardrail lab-action-guardrail-ready' : 'lab-action-guardrail'}>
+            <span>Run action</span>
+            <strong>{segmentationRunReady ? 'Ready to submit a segmentation job' : segmentationRunBlockedReason}</strong>
+          </div>
           {rasterDatasets.length === 0 ? (
             <div className="result-state result-state-empty">
               <strong>No raster datasets available for segmentation.</strong>
@@ -237,7 +252,7 @@ export function SegmentationLab({
             className="primary-action"
             type="button"
             onClick={onRunSegmentation}
-            disabled={runningSegmentation || !selectedProjectId || rasterDatasets.length === 0 || !selectedSegmentationModelConfigured}
+            disabled={runningSegmentation || !segmentationRunReady}
           >
             Run segmentation
           </button>

frontend/src/styles/app.css

@@ -2719,6 +2719,40 @@ button.entity-card {
   overflow-wrap: anywhere;
 }
 
+.lab-action-guardrail {
+  display: flex;
+  min-width: 0;
+  align-items: center;
+  justify-content: space-between;
+  gap: 0.6rem;
+  border: 1px solid #d8e3de;
+  border-radius: 8px;
+  padding: 0.52rem 0.62rem;
+  background: #ffffff;
+}
+
+.lab-action-guardrail-ready {
+  border-color: #b8dcc9;
+  background: #f8fff9;
+}
+
+.lab-action-guardrail span {
+  flex: 0 0 auto;
+  color: var(--muted);
+  font-size: 0.72rem;
+  font-weight: 700;
+  text-transform: uppercase;
+}
+
+.lab-action-guardrail strong {
+  min-width: 0;
+  color: var(--text);
+  font-size: 0.88rem;
+  line-height: 1.28;
+  text-align: right;
+  overflow-wrap: anywhere;
+}
+
 .ai-lab-shell .model-list {
   grid-template-columns: repeat(auto-fit, minmax(12.5rem, 1fr));
   gap: 0.55rem;