fix(items): close label editor on dismiss

Author: stefan-ernst

frontend/src/lib/features/items/ItemDetailSidebar.svelte

@@ -969,6 +969,7 @@
                 placeholder={t('items.selectOrCreateLabels') || 'Select or create labels...'}
                 disabled={!canEdit || !isSystemFieldEditable('labels')}
                 onSelect={savePersonalLabels}
+                onClose={() => (editingPersonalLabels = false)}
                 onCancel={() => (editingPersonalLabels = false)}
               />
             </div>

frontend/src/lib/pickers/BasePicker.svelte

@@ -72,6 +72,7 @@
 
     // Event callbacks
     onOpen = () => {},
+    onClose = () => {},
     onSelect = () => {},
     onCancel = () => {},
     onChange = () => {}
@@ -347,11 +348,15 @@
     }
   }
 
-  // Handle dropdown close without selection (single-select only)
+  // Notify callers whenever the dropdown closes. Preserve the legacy
+  // single-select cancellation callback for closes without a selection.
   let wasOpen = $state(false);
   $effect(() => {
-    if (wasOpen && !$open && !$selected && !multiple) {
-      onCancel();
+    if (wasOpen && !$open) {
+      onClose();
+      if (!$selected && !multiple) {
+        onCancel();
+      }
     }
     if (!wasOpen && $open) {
       highlightedIndex = 0;

frontend/src/lib/pickers/PersonalLabelCombobox.svelte

@@ -23,6 +23,7 @@
     labels: providedLabels = null,
     loading: providedLoading = false,
     onOpen = null,
+    onClose = null,
     onSelect = () => {},
     onCancel = () => {}
   } = $props();
@@ -153,6 +154,7 @@
   getValue={(label) => label?.id}
   getLabel={(label) => label?.name ?? ''}
   onOpen={() => onOpen?.()}
+  onClose={() => onClose?.()}
   onChange={handleChange}
   onCancel={handleCancel}
 >