Sign-in optional, rest grants +1 strength, cutscenes collapse to a single Skip

Sign-in is optional. You can start playing without an account, and Settings is always reachable from the title screen and in-game. Both were friction points worth removing before opening the public web build to strangers.

Resting grants a buff. Per #257, a base rest now applies +1 strength to your heroes for the next fight. Rest stops being purely a heal step and becomes a small tactical choice.

Cutscene controls collapsed. Previously cutscenes showed both a Next button and a Skip-animation button; now there's a single Skip. Fewer buttons, less to read, faster to move through.

Cutscene dialogue boxes now share a fixed 4-line minimum height with regular dialogue boxes, so the layout doesn't reflow as dialogue length changes. Daily Arena popup fight cards hug their content and equalize to the tallest card in the row — no more uneven card heights.

Bug fix: #298 — a downed hero's dead sticker was overlaying the health/mana stats in the vertical (web) fight column. The sticker now sits where it doesn't obscure the stat block.