Handle case when no pdb file

components/content/MolstarPdbePlugin.vue

@@ -218,7 +218,7 @@ const moleculeFormat: Ref<string> = ref("pdb")
                         <v-col>
                             <PlotFigure v-if="sanitizedPaeData?.length > 0 && paeError === null" defer
                                 :options="plotPaeOptions"></PlotFigure>
-                            <v-alert v-else type="warning">{{ paeError }}</v-alert>
+                            <v-alert v-else type="warning" variant="tonal">{{ paeError }}</v-alert>
                             <v-card flat color="transparent">
 
                                 <v-card-title>Model Confidence</v-card-title>

components/content/StructureDb.vue

@@ -67,8 +67,9 @@ function toSystemName(rawName: string) {
                 <td :colspan="columns.length">
                     <v-card flat color="transparent">
                         <v-card-text>
-                            <MolstarPdbePlugin :data-urls="[`/${toSystemName(item.system)}/${pdbNameToCif(item.pdb)}`]">
+                            <MolstarPdbePlugin v-if="item?.pdb && item.pdb !== 'na'" :data-urls="[`/${toSystemName(item.system)}/${pdbNameToCif(item.pdb)}`]">
                             </MolstarPdbePlugin>
+                            <v-alert v-else variant="tonal" type="warning">No structure file</v-alert>
                         </v-card-text>
                     </v-card>
                 </td>