fix: make render video waiters request the target frame before awaiting

[ubugeeei]

Finding

Canvas-frame waiters can wait for a target frame without actively requesting that frame, which can hang or observe stale frames depending on render timing.

Evidence

• src/lib/video/video-render.tsx wait path.
• src/lib/vue.tsx duplicates similar behavior.
• render/src/main.rs drives frame-by-frame capture.

Acceptance criteria

• Ensure waitCanvasFrame sends/refreshes the target frame request before awaiting.
• Keep React and Vue implementations consistent.
• Add a small regression check if feasible.

[ubugeeei]

対応済みです。修正は PR #1 / commit 9cf4498 に反映済みです。