fix: 6 priority-3 bug fixes with regression tests

- Issue 83: Mana Tide pulse factor now ranges 0.5x-1.5x (was 0.5x-1.0x)
- Issue 82: SteadyStream no longer returns early like EternalFlow; only skips incursion penalty
- Issue 81: Prestige store partialize now includes defeatedGuardians, signedPacts, signedPactDetails, pactRitualFloor, pactRitualProgress, loopInsight, pactSlots
- Issue 80: Combat store partialize now includes floorHP, floorMaxHP, castProgress, spireMode, clearedFloors, golemancy, equipmentSpellStates, activityLog, achievements
- Issue 78: cancelDesign now always cancels designProgress first, then designProgress2
- Issue 79: startDesigningEnchantment now uses designProgress2 when designProgress is occupied

Added 13 regression tests in src/lib/game/__tests__/regression-fixes.test.ts
Refactored craftingStore types to craftingStore.types.ts to stay under 400-line limit

src/lib/game/stores/combatStore.ts

@@ -275,6 +275,15 @@ export const useCombatStore = create<CombatState>()(
         maxFloorReached: state.maxFloorReached,
         spells: state.spells,
         activeSpell: state.activeSpell,
+        floorHP: state.floorHP,
+        floorMaxHP: state.floorMaxHP,
+        castProgress: state.castProgress,
+        spireMode: state.spireMode,
+        clearedFloors: state.clearedFloors,
+        golemancy: state.golemancy,
+        equipmentSpellStates: state.equipmentSpellStates,
+        activityLog: state.activityLog,
+        achievements: state.achievements,
       }),
     }
   )