nx_user_sim_games.nx

nx_user_sim_games.nx -- CHAOS-USER simulator for the C-stage games (operator: "playtesting isnt just api but actually mimics real users"). Drives nx_tictactoe and nx_checkers through the EXACT functions the browser click-handlers call (nx_ttt_try_apply / nx_ttt_pick / nx_chk_apply_*) -- the WASM export surface IS the UI's entry surface -- but in REAL-USER patterns, not happy-path API order: * misclicks: occupied cells, out-of-range indices, double-clicks * impatient clicking after the game has ended * full seeded games to termination against the AI Asserts the invariants a real player experiences: illegal input is a visible no-op (state hash unchanged), games terminate, the perfect AI never loses, a finished board ignores clicks. This is the P0 guided-bot seed from the honesty roadmap. Honest scope: covers the export surface; true DOM-event/pixel mimicry needs the SS22.5 sovereign browser-test-runner (PM plan). Catches the W/S-inversion CLASS at the state layer: user input -> wrong state transition. Exit: 0 all green (prints USER-SIM ALL-PASS); 1-6 = failing invariant. license_tier: ORIGINAL