Add research money costs, longer research times, era-scaled talent costs, and persona strategy

Research now costs money (drained per-tick) with ~2.5-3.5x longer durations by category.
Early-game talent budget costs reduced via era multiplier (startup 0.2x → bigtech 1.0x).
New seed-driven PersonaStrategy with 8 axes of variation for meaningful multi-run testing.
CI multi-run switched from greedy to persona strategy.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/shared/src/constants/gameBalance.ts

@@ -1032,3 +1032,10 @@ export const COMPETITOR_PRODUCT_THRESHOLDS = {
 
 export const COMPETITOR_CATCHUP_SHARE_THRESHOLD = 0.05;
 export const COMPETITOR_CATCHUP_PRICE_CUT = 0.3;
+
+export const ERA_BUDGET_COST_MULTIPLIER: Record<Era, number> = {
+  startup: 0.2,
+  scaleup: 0.6,
+  bigtech: 1.0,
+  agi: 1.5,
+};

packages/shared/src/types/research.ts

@@ -13,6 +13,7 @@ export interface ActiveResearch {
   totalTicks: number;
   allocatedResearchers: number;
   allocatedCompute: number;
+  moneySpent: number;
 }
 
 export interface ResearchNode {
@@ -27,6 +28,7 @@ export interface ResearchNode {
     researchPoints: number;
     compute: number;
     ticks: number;
+    money: number;
   };
   effects: ResearchEffect[];
 }