v0.5.0 — OpenRouter + OpenAI

New providers

• OpenRouter: prepaid balance as a Credits gauge (management key), per-key quota window, 30-day per-model usage history with reasoning tokens. Regular sk-or-v1 keys work with graceful degradation (key quota only).
• OpenAI: organization spend + per-model tokens via the admin Usage API (sk-admin- key required — project keys cannot read usage). Monthly cost as an uncapped window, cursor-paginated, per-SKU cost breakdown.

Also

• Add-account flow now shows per-provider key placeholders, instructions, and a non-blocking warning when a key doesn't match the expected shape.
• Provider registry is metadata-driven (id, name, icon, key hint, advisory pattern) — future providers are a single class + icon.

API shapes verified against official docs on release day. 29 tests green.

APK: sideload ai-usage-monitor.apk.