Datenbank von SQLite auf Postgres umgestellt

Verbindung über KVER_DSN; Tabelle user heißt jetzt account (reserviertes
Wort in Postgres). kver import-sqlite übernimmt die alte Datei einmalig in
einer Transaktion.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TiXsPUqw7oeomZ8wZrQW5q

auth.go

@@ -39,7 +39,7 @@ func getSession(r *http.Request) (*Session, bool) {
 
 	s := Session{Value: c.Value}
 	err = db.QueryRow(
-		`SELECT uid, created_at, expires, description FROM session WHERE value = ?`,
+		`SELECT uid, created_at, expires, description FROM session WHERE value = $1`,
 		c.Value,
 	).Scan(&s.UID, &s.CreatedAt, &s.Expires, &s.Description)
 	if err != nil {
@@ -47,7 +47,7 @@ func getSession(r *http.Request) (*Session, bool) {
 	}
 
 	if s.Expires < time.Now().Unix() {
-		db.Exec(`DELETE FROM session WHERE value = ?`, c.Value)
+		db.Exec(`DELETE FROM session WHERE value = $1`, c.Value)
 		return nil, false
 	}
 
@@ -73,7 +73,7 @@ func handleLogin(w http.ResponseWriter, r *http.Request) error {
 	// wird der Endpunkt zum Nutzernamen-Orakel.
 	var uid int64
 	var hash []byte
-	err := db.QueryRow(`SELECT uid, password FROM user WHERE username = ?`, username).Scan(&uid, &hash)
+	err := db.QueryRow(`SELECT uid, password FROM account WHERE username = $1`, username).Scan(&uid, &hash)
 	if err == sql.ErrNoRows {
 		return errBadCredentials
 	} else if err != nil {
@@ -112,14 +112,14 @@ func startSession(w http.ResponseWriter, r *http.Request, uid int64) error {
 		return Internal(err)
 	}
 
-	db.Exec(`DELETE FROM session WHERE expires < ?`, now)
+	db.Exec(`DELETE FROM session WHERE expires < $1`, now)
 	if _, err := db.Exec(
-		`INSERT INTO session (uid, created_at, expires, description, value) VALUES (?, ?, ?, ?, ?)`,
+		`INSERT INTO session (uid, created_at, expires, description, value) VALUES ($1, $2, $3, $4, $5)`,
 		uid, now, expires, "", token,
 	); err != nil {
 		return Internal(err)
 	}
-	db.Exec(`UPDATE user SET last_login = ? WHERE uid = ?`, now, uid)
+	db.Exec(`UPDATE account SET last_login = $1 WHERE uid = $2`, now, uid)
 
 	http.SetCookie(w, &http.Cookie{
 		Name:     "session",
@@ -135,7 +135,7 @@ func startSession(w http.ResponseWriter, r *http.Request, uid int64) error {
 
 func handleLogout(w http.ResponseWriter, r *http.Request) {
 	if s, ok := getSession(r); ok {
-		db.Exec(`DELETE FROM session WHERE value = ?`, s.Value)
+		db.Exec(`DELETE FROM session WHERE value = $1`, s.Value)
 	}
 	http.SetCookie(w, &http.Cookie{
 		Name:     "session",