v2.8.8 — fix #56 (no auto-reload on window focus)

v2.8.8 — fix #56 (no auto-reload on window focus)

Resolves issue #56: the embedded Wan2GP view is no longer reloaded when the
launcher window is restored after being hidden/covered/minimized while a
generation was running. That reload discarded all in-page input (prompt,
reference media, settings).

The v2.8.0 backgroundThrottling:false fix already keeps the queue panel live
while hidden, so the re-sync was redundant — only its data-loss downside
remained. The crash-watchdog reload is retained (fires only on an actual
renderer crash, where there is nothing to lose).

Verification

• node --check main.js / preload.js → OK
• npm run test → 82/82 pass
• Built Wan2GP-Desktop-Launcher-2.8.8-win-x64.exe (unsigned — no SignPath token in local build)
• User confirmed: window no longer reloads on focus after generation, inputs preserved.

Note: the published artifact is unsigned. Code signing (SignPath) is applied
automatically on CI releases where the SIGNPATH_* secrets are configured.