fix: report keyless OpenSky access in setup doctor

docs/CURRENT-STATE.md

@@ -2942,6 +2942,7 @@ are omitted rather than framing the wrong part of the globe.
 - Build gate: `npm run build`
 - Network access: local-only by default (`HOST=localhost` in dev-fresh.sh); LAN is an explicit opt-in via `HOST=0.0.0.0` (launcher prints a key-exposure warning + LAN URL; see SECURITY.md)
 - OpenSky default mode: OAuth (`OPENSKY_AUTH_MODE=oauth`; `anon` works without credentials)
+- Setup doctor resolves `OPENSKY_AUTH_MODE` from the environment and dotenv files. Explicit `anon` and a missing OAuth client pair report keyless anonymous access (rate-limited); a complete OAuth pair retains the existing presence-only capability wording unless `anon` is selected. The proxy's auth behavior is unchanged.
 - Google key expected in Keychain service `google-maps-api` (or `GOOGLE_MAPS_API_KEY`, or `.env`)
 - OpenSky credentials expected in Keychain service `opensky-network` (or env, or `.env`); `OPENSKY_AUTH_MODE` and `OPENSKY_CREDENTIALS_FILE` read from `.env` too
 - Optional-key precedence in `dev-fresh.sh` is uniform — explicit shell env, then `.env`, then Keychain: `OPENAI_API_KEY` (Keychain `openai-api`/`api-key` — voice + HUD summary), `AISSTREAM_API_KEY` (`aisstream-api`/`api-key` — live vessels), `CESIUM_ION_TOKEN` (`cesium-ion`/`token` — Bing stacks), `TOMTOM_API_KEY` (`tomtom-api`/`api-key` — live traffic flow), `FIRMS_MAP_KEY` (`firms-map`/`map-key` — live fires), `LL2_API_TOKEN` (`.env` only)