Lisbon is a city where the map underestimates the walk. A few blocks can include a climb, a view, and a street that deserves more attention than the destination.
Choose viewpoints by light rather than popularity. One broad terrace, one narrow lane with a sudden opening, and one place to sit for ten minutes is enough for an evening.
Dinner can wait. The best route is often the one that arrives late, hungry, and ready to stay at the table longer than planned.