Add crit, dodge and counter upgrade stats

[Finesssee]

Upgrade points v2, part 2 of 3. Viewers can now spend points on three more stats.

Stat	Each level (1-8)	Ceiling	Quick duel	HP fight
Crit	4% a hit becomes a crit; HP fight: strike or heavy +50%	50%	yes	yes
Dodge	4% a hit or crit on you misses	50%	yes	no
Counter	+2% counter damage, and 2% a foe's miss becomes your counter	60% / 50%	yes	no

• A quick-duel swing checks luck, crit, dodge, then counter, each on its own roll slot (rolls[k*24+i]). The room sends 120 rolls.
• New crit, dodge, counter profile columns (additive migration). A rank reset trims levels from counter first.
• Pets keep boosting power, guard and luck only (PET_STATS); legendary text now says "+1 power, guard and luck".
• The overlay floats DODGE (and DODGE then COUNTER), LUCKY CRIT, and HP-fight crits.
• The fighter page shows 10 presets; Tank and Bruiser wait for vitality (PR 3).
• Docs: CONTRACTS §2, §4, §6, DUELS.md, STREAMER_SETUP.md.

Tests: bun run check (384 unit tests) and bun run test:ui pass.

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