fix: redeploy swarm stack when saving edits

clicking save on a swarm stack in edit mode was only persisting the
source files on disk — the running services were never updated with the
new config. wire the save button to deployStack so changes actually land
in swarm instead of silently getting ignored.

fixes #2361

Author: Giulio Savini

frontend/src/routes/(app)/swarm/stacks/new/+page.svelte

@@ -103,7 +103,7 @@
 		const { name, composeContent, envContent } = validated;
 
 		handleApiResultWithCallbacks({
-			result: await tryCatch(swarmService.updateStackSource(name, { composeContent, envContent })),
+			result: await tryCatch(swarmService.deployStack({ name, composeContent, envContent })),
 			message: m.common_update_failed({ resource: `${m.swarm_stack()} "${name}"` }),
 			setLoadingState: (value) => (saving = value),
 			onSuccess: async () => {