Build 11: node card tells 'can't reach node' apart from syncing

A flaky external node read as 'Syncing…' forever — the card now goes
red with 'Can't reach node' on wallet sync errors (wallet.sync_error())
and recovers on the next good cycle. Validated against a dead node and
back on a live one.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/gui/views/goblin/mod.rs

@@ -525,7 +525,10 @@ impl GoblinWalletView {
 			.get_data()
 			.map(|d| d.info.last_confirmed_height)
 			.unwrap_or(0);
-		let synced = height > 0 && !wallet.syncing();
+		// Distinguish "scanning" from "can't reach the node": a flaky
+		// external node otherwise reads as syncing forever.
+		let error = wallet.sync_error();
+		let synced = height > 0 && !wallet.syncing() && !error;
 		w::card(ui, |ui| {
 			ui.set_min_width(ui.available_width());
 			ui.horizontal(|ui| {
@@ -533,14 +536,26 @@ impl GoblinWalletView {
 				ui.painter().circle_filled(
 					dot.center(),
 					4.0,
-					if synced { t.pos } else { t.accent },
+					if error {
+						t.neg
+					} else if synced {
+						t.pos
+					} else {
+						t.accent
+					},
 				);
 				ui.add_space(8.0);
 				ui.vertical(|ui| {
 					ui.label(
-						RichText::new(if synced { "Node synced" } else { "Syncing…" })
-							.font(FontId::new(14.0, fonts::semibold()))
-							.color(t.surface_text),
+						RichText::new(if error {
+							"Can't reach node"
+						} else if synced {
+							"Node synced"
+						} else {
+							"Syncing…"
+						})
+						.font(FontId::new(14.0, fonts::semibold()))
+						.color(t.surface_text),
 					);
 					// Single line: wrapping strands the "·" separator at the
 					// end of the first line in the narrow sidebar card.