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

docs/project-structure.txt

@@ -10,16 +10,11 @@ Mana-Loop/
 │   ├── post-merge
 │   └── pre-commit
 ├── docs/
-│   ├── strategy/
-│   │   └── overall-remediation-plan.md
 │   ├── GAME_BRIEFING.md
 │   ├── circular-deps.txt
 │   ├── dependency-graph.json
 │   └── project-structure.txt
 ├── e2e/
-│   ├── combat.spec.ts
-│   ├── enchanting.spec.ts
-│   └── equipment.spec.ts
 ├── playwright-report/
 │   ├── data/
 │   │   ├── 1513ea5b9ea5985996f67ca36f2bc4d34add51f1.webm
@@ -153,7 +148,8 @@ Mana-Loop/
 │       │   ├── __tests__/
 │       │   │   ├── store-method-tests/
 │       │   │   ├── bug-fixes.test.ts
-│       │   │   └── computed-stats.test.ts
+│       │   │   ├── computed-stats.test.ts
+│       │   │   └── regression-fixes.test.ts
 │       │   ├── constants/
 │       │   │   ├── spells-modules/
 │       │   │   │   ├── advanced-spells.ts
@@ -247,6 +243,7 @@ Mana-Loop/
 │       │   │   ├── combat-state.types.ts
 │       │   │   ├── combatStore.ts
 │       │   │   ├── craftingStore.ts
+│       │   │   ├── craftingStore.types.ts
 │       │   │   ├── discipline-slice.ts
 │       │   │   ├── gameActions.ts
 │       │   │   ├── gameHooks.ts