Fix model freshness stuck at 0% by calling onModelDeployed on deploy

onModelDeployed was defined but never invoked — lastModelReleaseTick
stayed at 0 so the freshness guard always returned 0. Now deployModel
updates obsolescence state, setting freshness to 1.0 with proper decay.

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

apps/web/src/store/index.ts

@@ -42,7 +42,7 @@ import {
 } from '@ai-tycoon/shared';
 import {
   emptyDCNetworkSummary, emptyCampusNetworkSummary, emptyClusterNetworkSummary,
-  BENCHMARKS, TECH_TREE,
+  BENCHMARKS, TECH_TREE, onModelDeployed,
 } from '@ai-tycoon/game-engine';
 import { INITIAL_RIVALS } from '@ai-tycoon/game-engine';
 
@@ -1082,6 +1082,10 @@ export const useGameStore = create<Store>()(
             ...pl, modelId, isActive: true,
           })),
         },
+        market: {
+          ...s.market,
+          obsolescence: onModelDeployed(s.market.obsolescence, s.meta.tickCount),
+        },
       })),
 
       deployVariant: (familyId, variantId) => set((s) => ({