- Add chatFileRoutes(db, storageService) after assistantHandoffRoutes (inside boardMutationGuard)
- Add nexusSettingsRoutes() after chatFileRoutes
- Extend nexusSettingsSchema with voiceEnabled: z.boolean().default(false)
- Update default return values in nexusSettingsService.get() to include voiceEnabled: false
- Add voiceEnabled?: boolean to NexusSettings client interface in hardware.ts
- Add hardwareService with Apple Silicon / GPU / cpu_only tier detection
- Add 3s Promise.race timeout for si.graphics() with cpu_only fallback
- Add nexusSettingsService with Zod validation and file-backed persistence
- Extend ollama-model-catalog.json with tier arrays on every variant
- Add qwen3:8b family to catalog
- Update getRecommendedModel to accept optional hardwareTier parameter
- All 13 unit tests pass (TDD green)
