DRY pass #3: the labels store swaps a returned label in one way (#5373)

rename and setColor each found the label and replaced it, keeping the count
the single-label PATCH doesn't recompute; keepingCount(updated) is that.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/src/stores/labels.ts

@@ -18,6 +18,13 @@ export const useLabelsStore = defineStore("labels", () => {
     items.value.sort((a, b) => a.name.localeCompare(b.name));
   }
 
+  // Put a label the server sent back in place of ours. A single-label PATCH doesn't
+  // recompute the count, so the one we have is kept.
+  function keepingCount(updated: Label): void {
+    const idx = items.value.findIndex((lb) => lb.id === updated.id);
+    if (idx >= 0) items.value[idx] = { ...updated, count: items.value[idx].count };
+  }
+
   async function load(): Promise<void> {
     items.value = await repo.labels.list();
     loaded.value = true;
@@ -62,16 +69,12 @@ export const useLabelsStore = defineStore("labels", () => {
       await load();
       return;
     }
-    const idx = items.value.findIndex((lb) => lb.id === id);
-    // The single-label PATCH doesn't recompute the count — keep the one we have.
-    if (idx >= 0) items.value[idx] = { ...updated, count: items.value[idx].count };
+    keepingCount(updated);
     sort();
   }
 
   async function setColor(id: string, color: string): Promise<void> {
-    const updated = await repo.labels.setColor(id, color);
-    const idx = items.value.findIndex((lb) => lb.id === id);
-    if (idx >= 0) items.value[idx] = { ...updated, count: items.value[idx].count };
+    keepingCount(await repo.labels.setColor(id, color));
   }
 
   async function remove(id: string): Promise<void> {