🧪 test: add error path test for orderBridge.read JSON parsing

[dhaatrik]

This PR addresses a testing gap in src/services/orderBridge.ts by adding a test case for the error path in localStorage JSON parsing.

🎯 What:

• Created src/services/orderBridge.test.ts to test the orderBridge service.
• Created src/services/setup-bun.ts to mock DOM globals (localStorage, window, CustomEvent, etc.) for bun test.

📊 Coverage:

• Scenarios now tested include:
  • getActiveOrders: empty storage, valid JSON, and invalid JSON (the identified gap).
  • publishOrder: new order, updating existing order, and event dispatching.
  • updateOrderStatus: successful update and non-existent order.
  • removeOrder: removing by ID.
  • onOrderChange: handling storage and custom fd-order-change events, plus unsubscription.

✨ Result:

• Increased test coverage for core service logic.
• Robust verification of error handling in orderBridge.read.
• Established a pattern for running tests with bun test when standard Vitest environments are unavailable.

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PR created automatically by Jules for task 16743211526671032895 started by @DhaatuTheGamer

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