feat(tray): add Windows tray icon support and update icon selection logic

apps/desktop-client/scripts/generate-brand-icons.cjs

@@ -176,6 +176,7 @@ function buildMainProcessIcons() {
   // Tray icons are 32x32 px and loaded @2x in tray.ts (=> ~16pt on retina).
   // Glyph size is controlled by targetH in trayLogoSvg(), not by an rsvg -h.
   const trayNormal = b64(svgToPng(trayLogoSvg(), 'tray-normal'))
+  const trayWindows = b64(svgToPng(trayLogoSvg(BRAND_BLUE), 'tray-windows'))
   const trayDanger = b64(svgToPng(trayLogoSvg(DANGER_RED), 'tray-danger'))
 
   // Dock / window icons: logo on the brand plate (normal) and danger plate.
@@ -200,6 +201,9 @@ function buildMainProcessIcons() {
     '// macOS menu-bar template silhouette (rendered @2x).',
     `export const TRAY_ICON_BASE64 =\n  '${trayNormal}'`,
     '',
+    '// Windows tray icon: brand-blue silhouette for light tray flyouts.',
+    `export const TRAY_WINDOWS_ICON_BASE64 =\n  '${trayWindows}'`,
+    '',
     '// Tray icon shown when accounts have health issues (rendered @2x, not a template).',
     `export const TRAY_DANGER_ICON_BASE64 =\n  '${trayDanger}'`,
     '',