[Issue]: Swipe counter always visible on single-swipe messages (regression in 2.0.5)

[Romuromylus]

Summary

As of 2.0.5 the per-message swipe counter (the "current / total" indicator and swipe arrows) is always displayed, even when a message has only a single swipe. In previous versions it only appeared when a message had multiple swipes.

Expected behavior

The swipe counter and navigation arrows should only be visible when a message has more than one swipe, as in all versions before 2.0.5.

Actual behavior

The swipe counter shows on every message, including single-swipe messages that display a constant "1 / 1".

Steps to reproduce

1. Open any chat on 2.0.5.
2. Generate or view a message that has only one swipe.
3. Observe the swipe counter (and arrows) are displayed even though there are no other swipes to navigate to.

Environment

• Marinara Engine version: 2.0.5
• Install type: any
• OS + version: any
• Browser or app shell: any

Logs, screenshots, or video

Reported in the community Discord. Purely a visual regression.

Additional context

Regression in packages/client/src/components/chat/SwipeJumpControl.tsx: the visibility guard was changed to if (swipeCount <= 1 && !onCreateNextSwipe) return null;. Since the message layouts now always pass onCreateNextSwipe when regeneration is available, the guard no longer suppresses the control for single-swipe messages.

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