fix: ensure tag input maintains focus after adding tags [dev]

- Add focus restoration after recipe state update
- Add focus in finally block to ensure it happens even on error
- Keeps cursor in tag input field for rapid tag entry

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

packages/web/src/pages/RecipeDetail.tsx

@@ -164,6 +164,8 @@ function RecipeDetail() {
       const response = await recipesApi.getById(id);
       if (response.data) {
         setRecipe(response.data);
+        // Restore focus after state update
+        setTimeout(() => tagInputRef.current?.focus(), 0);
       }
     } catch (err) {
       console.error('Failed to add tag:', err);
@@ -172,6 +174,8 @@ function RecipeDetail() {
       await loadRecipe(id);
     } finally {
       setSavingTags(false);
+      // Ensure focus is maintained
+      setTimeout(() => tagInputRef.current?.focus(), 0);
     }
   };