Clamp battle save unit levels

scripts/verify-battle-save-normalization.mjs

@@ -55,6 +55,7 @@ try {
     ['self-targeting attack intent', { attackIntents: [{ attackerId: 'liu-bei', targetId: 'liu-bei' }] }],
     ['duplicate attack intent attacker id', { attackIntents: [{ attackerId: 'liu-bei', targetId: 'rebel-1' }, { attackerId: 'liu-bei', targetId: 'rebel-1' }] }],
     ['invalid units array', { units: {} }],
+    ['too high unit level', { units: patchUnit(0, { level: 100, exp: 0 }) }],
     ['invalid unit exp threshold', { units: patchUnit(0, { exp: 100 }) }],
     ['invalid max-level unit exp threshold', { units: patchUnit(0, { level: 99, exp: 101 }) }],
     ['invalid unit hp', { units: patchUnit(0, { hp: 99, maxHp: 30 }) }],

src/game/state/battleSaveState.ts

@@ -294,6 +294,7 @@ function isEquipmentStateForSlot(value: unknown, slot: EquipmentSlot, options: B
 function isValidCharacterProgress(level: unknown, exp: unknown) {
   return (
     isPositiveInteger(level) &&
+    Number(level) <= 99 &&
     Number.isInteger(exp) &&
     Number(exp) >= 0 &&
     (Number(level) >= 99 ? Number(exp) <= 100 : Number(exp) < 100)