fix(upgrade): resolve application upgrade failures

[zhengkunwang223]

Refs #13688

[chatgpt-codex-connector]

💡 Codex Review

1Panel/agent/app/service/app_upgrade.go

Lines 457 to 458 in 70594d1

	} else if err = appInstallRepo.Save(context.Background(), &u.candidate); err != nil {
	return err

Refresh persisted container names after the new Compose is started

For upgrades using the supported custom Compose editor that rename an explicit container_name or change the service set, candidate still carries original.ContainerName and that stale value is saved here. The deleted readiness helper was also the only post-upgrade discovery that replaced it with the containers actually created; later syncAppInstallStatus queries only the stored names, so it can mark the upgraded application as missing/error and omit newly introduced services. Recompute and persist the current container names before saving the candidate.

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