fix: harden runtime and remove placeholder features

apps/api/internal/app/session.go

@@ -8,20 +8,20 @@ import (
 func (a *App) issueSession(w http.ResponseWriter, r *http.Request, userID string) error {
 	token := randomToken()
 	sessionID := newID("ses")
-	expires := a.now().UTC().Add(time.Duration(a.cfg.SessionTTLHours) * time.Hour)
+	expires := a.now().UTC().Add(time.Duration(a.config().SessionTTLHours) * time.Hour)
 	if _, err := a.db.ExecContext(r.Context(), `INSERT INTO sessions(id,user_id,token_hash,expires_at,created_at) VALUES(?,?,?,?,?)`,
 		sessionID, userID, hashToken(token), expires.Format(time.RFC3339Nano), a.now().UTC().Format(time.RFC3339Nano)); err != nil {
 		return err
 	}
 	http.SetCookie(w, &http.Cookie{
-		Name:     a.cfg.CookieName,
+		Name:     a.config().CookieName,
 		Value:    token,
 		Path:     "/",
 		Expires:  expires,
 		MaxAge:   int(time.Until(expires).Seconds()),
 		HttpOnly: true,
 		SameSite: http.SameSiteLaxMode,
-		Secure:   !a.cfg.AllowInsecureHTTP,
+		Secure:   !a.config().AllowInsecureHTTP,
 	})
 	return nil
 }