fix(auth): log Entra login events to logbook

server.ts

@@ -336,6 +336,7 @@ async function startServer() {
         user = db.prepare('SELECT id, name, role, email FROM users WHERE id = ?').get(id) as User;
       }
       const token = jwt.sign({ userId: user.id, email: user.email }, JWT_SECRET, { expiresIn: JWT_EXPIRY });
+      addLog('system', `${user.name} logged in via Microsoft.`, { userId: user.id });
       res.redirect(`/?token=${encodeURIComponent(token)}`);
     } catch (err: any) {
       console.error('[Azure Auth] acquireTokenByCode error:', err);