fix: NPM remote toggle auto-save, proxy resync on remote change, webhook URL as path

- Remote NPM toggle now auto-saves immediately when toggled
- Toggling npm_remote triggers proxy resync (re-creates routes with server_ip or container name)
- Webhook URL shows just the path (/api/webhook/{secret}) instead of full URL with wrong domain
- Fix tag dropdown: resolve registry ID from name before fetching tags
- Remove unused fmt import

web/src/routes/projects/[id]/+page.svelte

@@ -158,7 +158,12 @@
 
 		tagsLoading = true;
 		try {
-			availableTags = await api.listRegistryTags(project.registry, project.image);
+			// Look up registry ID from name.
+			const registries = await api.listRegistries();
+			const reg = registries.find(r => r.name === project?.registry);
+			if (reg) {
+				availableTags = await api.listRegistryTags(reg.id, project.image);
+			}
 		} catch {
 			availableTags = [];
 		} finally {