Move vega audio files into assets/fx/vega/ subdirectory and register them via
assetManifest.js. Add weapon and missile sound cues banded by ship Mark, with
staggered playback in VegaCombatView to prevent audio clipping during barrages.
Wire up two previously inert tech effects in combat:
- Stealth Field (cloaked): applies a flat accuracy malus via cloakEvasion rule.
- Black Hole Generator (singularity): adds passive shield pierce via
singularityShieldPierce rule on every weapon fired by the design.
Update tech descriptions, ship detail display, and designFor() to reflect
these effects. Fix a bug where singularity was never copied into the design
object.
Add vega-endturn cue to End Turn / Next Round buttons (no-op when busy),
remove hardcoded audio loads from PreloadScene, and add verification tests
that isolate each flag with A/B battle comparisons.
