fix: apply the chain/asset-standard label to the main balance list too

The Send/Receive/etc. network picker (NetworkFlowViewModel) already showed
"Ethereum (ERC-20)"/"Tron (TRC-20)" for a multi-chain token's per-chain rows,
but the main Assets dashboard's own expandable per-token breakdown (tap a
token like USDT to see every chain it exists on) is a completely separate
code path (TokenAssetMappers/TokenAssetViewHolder) that still showed a bare
chain name - found via a real device screenshot of that specific screen.

Moved the shared display-name-with-label logic to a public extension
(Chain.displayNameWithAssetStandard(), runtime/ext/ChainExt.kt) so both
screens build the exact same string instead of duplicating (and now
diverging) the same logic twice.

runtime/src/main/java/io/novafoundation/nova/runtime/ext/ChainExt.kt

@@ -515,6 +515,18 @@ val Chain.assetStandardLabelOrNull: String?
         else -> null
     }
 
+/**
+ * Chain display name with its token-standard label appended where [assetStandardLabelOrNull] applies, e.g.
+ * "Ethereum (ERC-20)". Shared across every screen that lists the same token symbol once per chain (the
+ * Send/Receive/etc. network picker, the main balance list's per-token chain breakdown) - a bare chain name
+ * alone doesn't convey which issuance this is when multiple ecosystems share the same symbol.
+ */
+fun Chain.displayNameWithAssetStandard(): String {
+    val standardLabel = assetStandardLabelOrNull ?: return name
+
+    return "$name ($standardLabel)"
+}
+
 fun Chain.Asset.requireStatemine(): Type.Statemine {
     require(type is Type.Statemine)