feat: initpage com sync Go + auth + frontend em web/

internal/db/db.go

@@ -0,0 +1,41 @@
+package db
+
+import (
+	"database/sql"
+	"os"
+	"path/filepath"
+
+	_ "modernc.org/sqlite"
+)
+
+func Init(path string) (*sql.DB, error) {
+	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
+		return nil, err
+	}
+	db, err := sql.Open("sqlite", path+"?_pragma=foreign_keys(1)&_pragma=busy_timeout(5000)")
+	if err != nil {
+		return nil, err
+	}
+	if _, err := db.Exec(migrations); err != nil {
+		return nil, err
+	}
+	return db, nil
+}
+
+const migrations = `
+CREATE TABLE IF NOT EXISTS users (
+  id TEXT PRIMARY KEY,
+  email TEXT UNIQUE NOT NULL,
+  password_hash TEXT NOT NULL,
+  email_verified BOOLEAN DEFAULT 0,
+  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+  last_login_at DATETIME
+);
+
+CREATE TABLE IF NOT EXISTS user_sync (
+  user_id TEXT PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,
+  data TEXT NOT NULL,
+  version INTEGER DEFAULT 1,
+  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+`