balance(doomsday-clock): reshape wave cadence — flatten the front, steepen the endgame

[Zixer1]

What

Reshape the Doomsday Clock wave cadence so the required-share curve can be shaped, not just paced. WaveSchedule.rampSeconds / pauseSeconds become per-wave arrays (were single uniform values); levels are softened at the open and nudged at the top.

Why (OFM 2026 Summer data)

Analysis of all 9 tournament games under the current uniform fast cadence:

• ~75% of eliminations happened in the first half; the last third saw only ~7% → a rushed early game followed by a drawn-out endgame stalemate.
• The rush was worst in the biggest lobbies (up to 58% of deaths in the first third at 90 players) and disproportionately culled weaker/newer players.
• 85% of deaths are doom-driven (only ~15% pre-doom combat), so the wave shape is the effective lever.

Change

• Early waves lower + later — longer grace and early ramps give breathing room before the first cull.
• Late waves steeper, no pauses — a continuous endgame squeeze that breaks the stalemate and ends games sooner.
• Levels: 3/5/10/20/30/55% → 2.5/4.5/10/20/32/55% (softer open, slight top bump; final 55% squeeze unchanged). Same levels across presets — presets only change pace.

When each wave lands (mm:ss), current → proposed

Preset	W1	W2	W3	W4	W5	W6 (win)
veryfast — cur	5:00	7:30	10:00	12:30	15:00	17:30
veryfast — new	6:00	8:50	10:55	12:45	13:53	14:43
fast — cur	7:20	10:40	14:00	17:20	20:40	24:00
fast — new	8:40	12:40	15:40	17:40	19:10	21:00
normal — cur	10:00	15:00	20:00	25:00	30:00	35:00
normal — new	11:40	17:00	21:10	23:55	25:55	28:25
slow — cur	12:00	18:00	24:00	30:00	36:00	42:00
slow — new	14:00	20:20	25:20	28:40	31:10	34:10

Notes

• Contained to DoomsdayClock.ts — no other code reads the schedule shape; the HUD companion (doomsdayClockWaveState) is updated in lockstep so sim + HUD still agree.
• Tests updated to the new schedule; tests/DoomsdayClockExecution.test.ts passes (33/33).
• Values are data-informed playtest starting points, not final — the shape (flatten front, steepen back) is the point; exact grace/ramp/pause want tuning against live dev-lobby curves.
• Base is feat/doomsday-warship-decay (that branch introduces DoomsdayClock.ts; it isn't on main yet), so this is a clean balance-only diff on top of it.