feat: database layer with better-sqlite3, full schema and query functions

Implements Task 4 (TDD): wrote failing tests first, then the full SQLite database layer covering profiles, magic tokens, sessions, user progress, mnemonics, and letter stats. All 14 tests pass. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-04-30 00:34:59 +00:00
parent cf2081f643
commit 9b31119c7a
4 changed files with 397 additions and 1 deletions
@@ -180,7 +180,8 @@ dist
 *.db
 *.sqlite
 *.sqlite3
-data/
+data/*
+!data/.gitkeep

 # Build artifacts
 build/