Add an About screen with the build version; drop the animated background

[satran004]

Two UI changes for pre5, both reviewed running locally.

1. About, as its own sidebar entry

The first question on any bug report is "which version?" — and there was no way to answer it. No window title, no menu, and a native binary that reports nothing. With four pre-releases out and casks installing a fifth, "the latest one" isn't an answer.

It sits after Settings in the sidebar rather than inside Settings, so it's findable without knowing that versions live under a settings page.

About

Version
  Yano Wallet 0.1.0-pre4
  Managed node: Yano 0.1.0-pre13
  Runtime: native image (no JVM)      ← or "Java 25 (…)"
  Platform: Mac OS X 15.x (aarch64)
  [ Copy version details ]

Project
  what the wallet is · repo link · MIT · test-networks-only warning

Not hardcoded. BuildInfo.java is generated from gradle.properties at build time by :wallet-ui:generateBuildInfo. A hand-edited constant is wrong the moment someone forgets to bump it — exactly when a version display does most harm, by confidently naming the wrong build. Verified it tracks its source:

gradle.properties	generated constant
walletVersion = 9.9.9-test	WALLET_VERSION = "9.9.9-test"
walletVersion = 0.1.0-pre4	WALLET_VERSION = "0.1.0-pre4"

Java source, not a properties resource — native-image only bundles resources that are explicitly registered, so a .properties file would work in the jar build and silently return null in the native one. Missing exactly where it's hardest to notice.

AboutScreen takes no WalletUiController, so it renders when the node is down or the wallet is locked — which is when someone is filing a bug. The runtime line says native image (no JVM) rather than inventing a Java version the native build doesn't have; several bugs this month reproduced only under native-image.

2. Animated live-chain background removed

It didn't look good. It was shipped opt-in and off by default (PREFS.getBoolean(KEY, false)), so removing it changes nothing anyone currently sees — the no-background path is the well-travelled one.

removed	kept
the Appearance checkbox + its paragraph	theme picker, untouched
LivePrefs — existed only for that key	LiveChainModel, LiveBlocksView
the ambient LiveBlocksView behind every screen	the Live page and its own view
syncAmbient() + change listener	—

One behaviour change: liveNeeded() was ambientEnabled() || "Live".equals(active) and is now just the latter, so chain-tip polling runs only while the Live page is open. Strictly less work; identical where it's visible.

frame.setCenter(content) replaces the StackPane(ambient, content) wrapper; .shell paints -surface-0, so nothing behind the screens changed.

Deliberate non-change: LiveBlocksView keeps its now-unreachable ambient flag. Removing it means editing the drawing code the Live page depends on, for nothing a user can see — the class doc records why it survives. Worth doing later as its own change, with the Live page actually tested.

Checks

• ./gradlew build green — compile + tests, including LiveChainModelTest
• Both changes reviewed running the JVM build locally
• Native build not re-run since these landed; Clipboard via Ui.copyToClipboard is an existing path the Receive screen already uses, so risk is low, but a dev-release native run before tagging pre5 would confirm it

🤖 Generated with Claude Code