I think you can find on that narrow street what you’re looking for

All of them. I'm pretty sure every shop we went into has cork handbags , wallets ect......

Boa noite, amigo. Mais tranquilo impossível. Adoro andar a noite em todas as cidades que visito. Lisboa andei em todos os cantos de madrugada. Fui a Alfama, Chiado, Bairro Alto... Tudo hiper tranquilo. Pela madrugada,costumam lavar as ruas. Ja fui 2 vezes e fiz o mesmo roteiro, muito tranquilo.

Rua da Bica area has a lot of great local food restaurants and towards Calcade do Combro street top of Bica street to the West, restaurants both sides of the street are full with locals has best kitchen and price. The latter do not expect to be able to pay with credit card. Prefer cash as price is much lower and sometimes no pin transaction possible. Pay with smaller bills than €50,- - You see many local senior citizens occupy the place for menu del dia from €3,50 a platter. Day menu and a pint for €1,20 or less. - Also the cafés and bars in this area more for locals. Side streets and alleys are badly lit and is mainly your ‘not for tourists’ hint. - Making an effort speaking the language is appreciated. You will be addressed in Portuguese.

I'm not aware of such app that only shows where locals eat, however, one that the locals do use is Zomato . PT This shows a range of restaurantes to eat from and as a guide, look at the reviews in Portuguese and then translate them

Olá, Mesmo aos Domingos deverá haver restaurantes abertos na zona do Chiado. Creio que uma boa escolha seria visitar o topo do Elevador de Santa Justa e os cafés/restaurantes com vista para a cidade. Boa estadia.

Yes they are, however like everywhere in the world "influenced by fast food chains" with a bit of local taste. as Portuguese i suggest you to go to Terreiro do Paço or Alfama areas to really enjoy Portuguese culture.

If you are traveling with two or more together than taking taxi is easier and convenient and sometimes cheaper than metro. One time metro cost is 1.40 euros per person and min taxi charge is 3.25 euros.

Not very far but Lisbon is hilly and can be confusing with its narrow and curb streets. Better for the first time, take a taxi and avoid buses.