[AlexGeslani]

Summary

• adds deterministic level progression and visible next-level progress
• adds standard competitive line-clear and drop scoring
• adds reproducible seeded seven-bag sequencing with bounded reconnect replay offsets
• exposes a future server-seed seam while preserving cryptographically seeded solo play
• publishes v0.3.0-beta.1 as the final pre-multiplayer checkpoint

Verification

• 130/130 tests across 56 suites
• shipped JavaScript syntax checks
• npm audit --omit=dev: 0 vulnerabilities
• canonical stacklogic-dev.game.lan browser play acceptance
• deterministic-core exact-commit independent review: PASS, no findings
• release diff exact-hash independent review: PASS, no findings
• production and GitHub Pages remained on v0.2.0-beta.1 before promotion

Scope

This release contains no multiplayer networking. Create Match and Join Match remain Coming Soon.

Rollback

Revert the merge through a reviewed PR and allow the gated Pages workflow to redeploy; do not move release tags.