Introduce Send pages for singlesig, single input/output send

[johnny9]

These changes implement the first iteration of the Send coins flow for our Desktop Wallet. A QML model, SendRecipient, is defined to hold the values entered into the Send form which will then be used to construct the actual transaction. The resulting transaction will be held in another new QML model, WalletQmlModelTransaction, and that will be held by the WalletModel and used to render the confirmation page, SendReview.qml. This is designed to closely mirror the objects used in the current Qt SendCoinsDialog modules.

[johnny9]

Current:

Screencast.from.2025-02-20.10-18-37.mp4

Goal:

basic_send_flow_prototype.mp4

There are a few immediate things I will be working on adjusting within the context of this PR to match the proposed designs. Primarily I will focus on the layout of the pages to match as well as the transition animations.

[MarnixCroes]

24d1888

• It happens many times that clicking the Review button doesn't work.
  Nothing happens, it doesn't go to SendReview page.

And then after adding or removing a zero it works. (always below balance)

• The address is cleared after send is confirmed and navigated back to Send page, the Amount and Note should be cleared too?

[MarnixCroes]

maybe
make the button only click-able / highlighted on hover when there is a valid input?

[johnny9]

Will do. I will be coming back to this as a Validation PR.

[hebasto]

To fix the build error:

RCC: Error in 'qml/bitcoin_qml.qrc': Cannot find file 'controls/LabeledTextInput.qml'

I suggest (UPDATED):

--- a/src/Makefile.qt.include
+++ b/src/Makefile.qt.include
@@ -353,6 +353,7 @@ QML_RES_ICONS = \
   qml/res/icons/cross.png \
   qml/res/icons/error.png \
   qml/res/icons/export.png \
+  qml/res/icons/flip-vertical.png \
   qml/res/icons/gear.png \
   qml/res/icons/gear-outline.png \
   qml/res/icons/hidden.png \
@@ -396,6 +397,7 @@ QML_RES_QML = \
   qml/controls/ContinueButton.qml \
   qml/controls/CoreText.qml \
   qml/controls/CoreTextField.qml \
+  qml/controls/LabeledTextInput.qml \
   qml/controls/ExternalLink.qml \
   qml/controls/FocusBorder.qml \
   qml/controls/Header.qml \

---

Why not keep files in buildsystem scripts sorted?

[hebasto]

@johnny9

Want to update the PR and fix the CI?

[johnny9]

Update:

• Fixed missing component in Makefile
• Added missing bitcoinamount.h include in sendrecipient.h

[hebasto]

Needs rebase.

[johnny9]

Update from 9a863b0 to 55b946a

• Rebased with main
• Updated changes using clang-format-diff.py
• Added missing helper function in bitcoinamount.h

[johnny9]

Update from 55b946a to 727aa52

• Fix lint issue with duplicate include in walletqmlmodel.h

[johnny9]

24d1888

• It happens many times that clicking the Review button doesn't work.
  Nothing happens, it doesn't go to SendReview page.

And then after adding or removing a zero it works. (always below balance)

• The address is cleared after send is confirmed and navigated back to Send page, the Amount and Note should be cleared too?

Both of these are good to notice and will be addressed

The review button not working is due mainly to invalid inputs and are out of scope of the current basic implementation. This will be addressed as a validation PR. This will include error messaging.

The form not clearing is good to note and I make an issue to address this when I come back around to validation.

[hebasto]

ACK 727aa52, I have skimmed through the code and it looks OK.