feat(desktop): show download progress and diagnostics on splash (#3273)

fluxer_desktop/src/main/ShellUpdateCapability.test.mjs

@@ -391,6 +391,9 @@ describe('arming the blocked shell update', () => {
 				total: null,
 				progress: null,
 				seconds: null,
+				receivedBytes: null,
+				totalBytes: null,
+				bytesPerSecond: null,
 				action: {kind: 'quit', label: 'Quit'},
 				message: null,
 				versionLabel: null,
@@ -420,6 +423,9 @@ describe('arming the blocked shell update', () => {
 				total: null,
 				progress: null,
 				seconds: null,
+				receivedBytes: null,
+				totalBytes: null,
+				bytesPerSecond: null,
 				action: {kind: 'download', label: 'Download update'},
 				message: null,
 				versionLabel: null,
@@ -449,6 +455,9 @@ describe('arming the blocked shell update', () => {
 				total: null,
 				progress: null,
 				seconds: null,
+				receivedBytes: null,
+				totalBytes: null,
+				bytesPerSecond: null,
 				action: null,
 				message: SPLASH_MANUAL_UPDATE_MESSAGE,
 				versionLabel: 'Version 2026.823.1 available',