Marks M4 done in android/PLAN.md §9 build-progress and flips the top
status to "M0–M4 landed; M5 (design pass) next." Documents the account
self-service (/auth/me/account*), game-account linking, and text-only
own game-data screens shipped in RunicGateway/Android-app#9 — a pure
consumer of the existing bearer API, no backend/protocol change.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NgyHnrNa8WwG3doxvxjuCr
