[!NOTE] I'm rewriting the issue description. Feel free to work on one of the sub-issues below.

• Decide which numeric dialogs should be changed to input steppers (like in #20005).
• What should happen to the background color of the title of some dialogs like the deck picker and the tags dialogs?

---

Settings

• Minutes between automatic backups:
  • Change to input stepper (#20005).
• Daily backups to keep:
  • Same as above.
• Weekly backups to keep:
  • Same as above.
• Monthly backups to keep:
  • Same as above.
• Network timeout:
  • Same as above.
• Language:
  • Update background color.
• Error reporting mode:
  • Update background color.
• Deck for new cards:
  • Update background color.
• Frame style:
  • Update background color.
• Hide system bars:
  • Update background color.
• Toolbar position:
  • Update background color.
• Fetch media on sync
  • Update background color.
• Theme:
  • Update background color.
• Day theme:
  • Update background color.
• Night theme:
  • Update background color.

Decks

• Rename deck:
  • If you try to change the casing (upper vs lower), it will show the "Deck already exists" warning.

Browser

• Reposition new cards:
  • Text at the top says "Queue top:" twice, which doesn't make sense.
• Add tag:
  • Show red text if the tag already exists and disable the button. https://github.com/ankidroid/Anki-Android/pull/20368
• Set due date:
  • Limit the number.

---

The custom study dialogs

I suggest we remove the first two dialogs:

• These are just a source of confusion.
• There is a much better way to change the limits for today in the deck options.
• They don't fit the other dialogs which all create filtered decks.

Increase today's new card limit:

• Consider adding a title "Increase today's new card limit".
• Consider replacing the helper text with a toggle/checkbox to switch between increase/decrease. The OK button should change to "Increase"/"Decrease" to match the state of the toggle.

Increase today's review card limit:

• Same as above but with "review" instead of "new".

Preview new cards:

I suggest we remove this option and dialog because:

• There is already a preview feature in the card browser.

• The filtered deck created has the reschedule option off, which we should discourage as it's bad for the algorithm.

• Add a title "Preview new cards".

• Replace the description with "Preview new cards added in the last:".

• Add a unit "day"/"days" to the box.

• Replace "OK"/"Select" with "Create".

• If the resulting filtered deck is empty (i.e., no cards match the criteria), a red warning should appear and the button should be disabled, instead of an error dialog (see reference).

• Show a warning when the input is invalid, limit the digits, and prevent leading zeros, like in https://github.com/ankidroid/Anki-Android/pull/20520, except without input steppers.

Reference dialogs

---

Reminders 1

• Edit review reminder:
  • Replace "OK" with a more useful string.
  • Border text: "Card threshold".
  • Remove "Card threshold:" from the description and place the description above the entry box, making it wider.
  • Remove background color from the title.
  • Add "card"/"cards" unit in the box.
• Add review reminder:
  • Same as above.
• Select time:
  • Replace "OK" with a more useful string.
  • Change the "Select time" to a title.
  • In text mode: move the "Hour" and "Minute" into the borders.
• Delete this reminder?:
  • Replace "OK" with a more useful string.
  • Change the title to "Delete reminder".
  • Change the text to "This action cannot be undone. Are you sure?".

Reminders 2

• Edit review reminder:
  • Limit the number of digits.
  • Remove the red text "Please enter a whole number of cards".
  • If the box is empty, the button should be disabled, instead of showing the toast "Something went wrong, please try again".
• Add review reminder:
  • Same as above.

Managing fields

• Add field:
  • Show red text if field already exists and disable the button.
• Rename field:
  • Same as above.

Managing fields

• Add field:
  • Replace "OK" with a more useful string.
  • Add a border to the box and with "Name" in it.
• Rename field:
  • Add a border to the box and with "Name" in it.

---

• Delete field:
  • Replace "OK" with a more useful string.
• Reposition field:
  • Same as above.
  • Add a title "Reposition field".
  • Move "New position" into the border of the box. The range, e.g. "(1 ...2)" should be below the box in gray, similar to the "Set due date" dialog.