refactor: tick pipeline pattern — read all → compute all → write all (issue #103)

- New tick-pipeline.ts: TickContext/TickWrites types + buildTickContext/applyTickWrites orchestrator
- gameStore.ts tick(): refactored to 3-phase pipeline (read snapshot → compute updates → batch writes)
- combat-actions.ts: accept signedPacts as parameter instead of usePrestigeStore.getState() in combat loop
- combatStore.ts/combat-state.types.ts: updated processCombatTick signature for signedPacts passthrough
- craftingStore.ts: removed tempState = { ...get(), rawMana } as any anti-pattern
- preparation-actions.ts: accept rawMana as explicit parameter instead of GameState bag

src/lib/game/stores/craftingStore.ts

@@ -206,15 +206,17 @@ export const useCraftingStore = create<CraftingStore>()(
 
         // Preparation actions
         startPreparing: (equipmentInstanceId) => {
-          // Get rawMana from manaStore
           const rawMana = useManaStore.getState().rawMana;
-          // Temporary state to pass to preparation action
-          const tempState = { ...get(), rawMana } as any;
-          return PreparationActions.startPreparing(
+          const result = PreparationActions.startPreparing(
             equipmentInstanceId,
-            () => tempState,
+            rawMana,
+            get,
             set
           );
+          if (result) {
+            useCombatStore.setState({ currentAction: 'prepare' });
+          }
+          return result;
         },
 
         cancelPreparation: () => {