Buggy save confirmation dialog in details view

### Describe your issue

In the details view when we update a value, it forces us to click "Yes" to save changes.
When we click "No" or "Cancel" it just pops the dialog box and again on back gesture it shows the dialog box until we select "Yes", only then we can go back.
Also in the codebase there is a Snackbar which shows on update which is never shown.

### Steps to reproduce

1. Create task
2. Try updating some value and going back on home page from details page.

### What was the expected result?

1. Go back to homepage when "Yes" or "No" is clicked.
2. Stay on details page when "Cancel" is clicked.
3. Update the values and show Snackbar when "Yes" is clicked.

### Put here any screenshots or videos (optional)

https://github.com/user-attachments/assets/c9833d88-c423-4d0b-9641-ff9aa5dc2b83

### How can we contact you (optional)

[Zulip profile](https://ccextractor.zulipchat.com/#user/848633)

### Would you like to work on this issue?

Yes

### By submitting this issue, I have confirmed that:

- [x] I have starred the repo ⭐ and watched 👀 it on GitHub and followed the contribution guidelines.

Inizia dall’implementazione della vista dei dettagli e segui la finestra di dialogo di conferma del salvataggio e la Snackbar esistente menzionate nell’issue. Riproduci il flusso di aggiornamento e ritorno indietro descritto nei passaggi elencati, quindi verifica che Yes salvi e mostri la Snackbar, che No torni indietro senza salvare e che Cancel rimanga nella pagina dei dettagli.

Scritto dal modello di indicizzazione a partire dal testo della issue.