feat(cash): move Give to the left-aligned amount header

[bmc08gt]

Give still drew the centred v1 amount field with its currency flag, while Buy and Convert had already moved to the left-aligned display-extra-large header. Node 9641:16762 puts Give on the same header, so this turns on AmountEntryScreen's largeHeader and states the ceiling as "$X available", the way Convert and the v2 Get do.

The v2 header carries no flag, so tapping the amount no longer opens region selection — canChangeCurrency now says as much, and changing currency is still reachable from the wallet balance. The over-max line stays give-specific: the cap is the lower of the balance and the per-transaction send limit, and "available" alone wouldn't explain a limit-bound cap. The orphaned subtitle_giveCashHint string goes with it.

Two things surfaced while working through the flow end to end:

The success checkmark was never drawn. Confirming an amount dispatched the success state and the bill on the same frame, so the button went from spinner straight to the bill overlay. It now goes through dispatchSuccessThen, holding for SuccessHoldDuration first — the same beat the username, name and photo screens already wait.

The bill appeared over the "Send as a Link" and "Cancel" pills. The bill's bottom inset is the management row's measured height, which only arrives a frame after the bill composes. Animating that first 0 -> measured change put the card half its own inset too low, held it there for the 450ms animation delay, then slid it up over another 450ms. Only the tip card needs the inset animated — it moves in lockstep with the tip modal sliding up — so everywhere else it now snaps, landing while the enter spring is still carrying the card up from off-screen. Recorded at 15fps on an emulator: before, the card moves between frames 39 and 45; after, it is at its final position from the first frame it is visible. The tip card's full-screen present is unchanged.