SvelteKit's use:enhance resets the form after a successful action.
The name input used value={data.tag.name} without bind:, so Svelte 5's
fine-grained reactivity did not re-apply the unchanged value after the
reset — leaving the field empty. Passing reset: false to update() fixes
this.
Also corrected the confirmation message from "renamed" to "saved" in
all three locales, since the action updates name, parent, and color.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>