0.20.6-alpha Map, combat, reward, and reset fixes.

- Tightened map generation so shops/rests never chain, only fights/events can repeat, paths see 0-2 elites, and the map always includes mid-map rests before the pre-boss rest.
- Renamed Fire Golem to Red Drake, corrected its attack facing, and raised Red Drake/Chimera combat overlays clear of their sprites.
- Fixed ultimate gauge lifecycle so full gauges stay full until the ultimate is used, then reset to zero, and tuned Priest ultimate to heal `30 + 5 * level` with Bless 2 and Regen 2.
- Reduced War Cry Attack Up SFX playback by 15%, added shop sell-gold and HUD portrait targeting coverage, and kept boss-demo XP from opening an immediate level-up screen.
- Boss rewards now present an epic pack plus a basic pack, and the required save reset gate advances to `0.20.6-alpha` so updating to this build clears previous player data back to the starter baseline.