rebrand: rename GoodGo → aPOS across all UI and display text
Replaced all user-facing "GoodGo" brand references with "aPOS"
across 35 files (53 occurrences):
- Layout headers: "aPOS Admin", "aPOS POS"
- Page titles: "— aPOS Admin", "— aPOS POS"
- Locale files: brand name keys
- Onboarding: welcome text, descriptions
- AI Chat: system prompt, provider headers
- Auth pages: login titles
Note: Internal namespace GoodGo.BlazorUi.Components.* preserved
(assembly reference, not user-facing brand text).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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