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

docs/circular-deps.txt

@@ -1,8 +1,8 @@
 # Circular Dependencies
-Generated: 2026-05-20T15:46:48.123Z
+Generated: 2026-05-20T16:38:29.616Z
 Found: 3 circular chain(s) — these MUST be fixed before modifying involved files.
 
-1. Processed 125 files (1.5s) (3 warnings)
+1. Processed 125 files (1.4s) (3 warnings)
 2. 1) stores/gameStore.ts > stores/gameActions.ts
 3. 2) stores/gameStore.ts > stores/gameLoopActions.ts