ProgressPlugin now fires XpAwardedEvent on every win. AnimationPlugin
shows a "+N XP" toast so players see XP feedback immediately after
winning. Server leaderboard opt-in endpoint also now validates that
display_name is at most 32 characters.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
On GameWonEvent, computes xp_for_win(time, used_undo) from
solitaire_data, calls PlayerProgress::add_xp, and emits LevelUpEvent
when the level changes. Persists atomically through the configurable
storage path; ProgressPlugin::headless() disables I/O for tests.
Introduces ProgressUpdate system set so future systems can run after
progress mutations.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
root