Fix crypto.randomUUID crash on non-HTTPS origins

Replace all crypto.randomUUID() calls with a uuid() utility that
falls back to Math.random-based generation when the Web Crypto API
is unavailable (plain HTTP contexts).

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

apps/web/src/store/index.ts

@@ -19,6 +19,7 @@ import {
   GPU_CONFIGS,
   FUNDING_ROUNDS,
   OPEN_SOURCE_REPUTATION_BOOST,
+  uuid,
 } from '@ai-tycoon/shared';
 import { INITIAL_RIVALS } from '@ai-tycoon/game-engine';
 
@@ -105,7 +106,7 @@ export const useGameStore = create<Store>()(
 
       addNotification: (n) => set((s) => ({
         notifications: [
-          { ...n, id: crypto.randomUUID(), read: false },
+          { ...n, id: uuid(), read: false },
           ...s.notifications.slice(0, 49),
         ],
       })),
@@ -176,7 +177,7 @@ export const useGameStore = create<Store>()(
         if (s.economy.money < buildCost) return s;
 
         const dc: DataCenter = {
-          id: crypto.randomUUID(),
+          id: uuid(),
           name,
           location,
           gpus: [],