[jvsena42]

This PR replaces the switch icon on the Send Amount funding source button with a dropdown chevron, matching the new design.

Description

• Restyles the funding source button on Send Amount as an outlined button with a trailing down chevron when more than one wallet can pay, so it reads as a dropdown instead of a toggle
• Keeps the funding source button outlined with no icon when only one wallet can pay
• Adds a down chevron icon taken from the Figma arrow
• Adds the funding-source-dropdown.xml journey to cover the button and its list

Out of Scope

• Send Amount: the dropdown list itself, which already matches the design
• Send Amount: label letter spacing stays at the existing caption style instead of the design's 1 px

Design

• Funding source button
• Funding source dropdown

Preview

Spending selected	Dropdown open	Savings selected	Single source

QA Notes

Journeys

• new funding-source-dropdown.xml — the switchable funding source button is outlined with a down chevron and opens the wallet list

Manual Tests

N/A

Automated Checks

N/A

🤖 Generated with Claude Code

[ovitrif]

Triage: milestone 3.1.0, with its twin synonymdev/bitkit-android#1612. It closes no issue, so this PR carries the milestone itself. Not a release blocker.

[greptile-apps]

Confidence Score: 4/5

[Low impact] The change reaches the funding-source button on the iOS Send Amount screen.

The PR appears safe to merge, with a non-blocking wording correction in the new journey.

Findings

1.  Journey describes the wrong behavior ▶

Summary

The PR gives the Send Amount wallet picker an outline and replaces its leading switch arrows with a trailing dropdown chevron.

• The Send Amount wallet picker shows a down chevron when several wallets can pay.

_{Reviews (1) · Last reviewed commit: "feat: use dropdown chevron on funding so..." · Reviewed by Greptile}

[talosmachina]

No findings. Replaces the leading arrow-up-down icon on the Send Amount funding source button with a trailing chevron-down asset when more than one source can pay, keeps the button on the outlined .secondary variant in every case, and adds the funding-source-dropdown journey. Reviewed 9ddfd29, full tier, reasoned from the code and CI (iOS does not build on this box).

What I checked, and 3 candidates I ruled out

Read in full: SendAmountView.swift (the funding source row and assetButtonTestIdentifier), NumberPadActionButton.swift at the PR head
CI: SwiftFormat red, with every annotation in ElectrumSettingsScreen.swift and RgsSettingsScreen.swift (not in this diff), and the same check fails on master at f898732; tests and integration tests pending at review time; validate green

Ruled out

• Chevron renders white instead of the source color: the imageset sets template-rendering-intent: template, so .foregroundColor(color) tints it, the same as the existing chevron imageset.
• SVG asset unsupported: the catalog already ships 15 other SVG icons with preserves-vector-representation.
• Test id changes for the journey: AssetButton-switch still comes from assetButtonTestIdentifier when canSwitchFundingSource is true, so the existing popover anchor and ids are unchanged.

Merge confidence: 4/5, SwiftFormat is red on files outside this diff (also red on master) and the test jobs had not reported yet.

[ovitrif]

@jvsena42 the red SwiftFormat check here comes from master's own files, which #1040 fixed (merged). Syncing this branch with master turns it green; if it still fails after that, run SwiftFormat 0.64.0 on this PR's changed files.