Add monoline icons to the topbar coordinates/sun readout

WAYPOINT_ICON (coords) and PENDING_ICON (countdown) reused as-is; two new
hand-drawn SUNRISE_ICON/SUNSET_ICON since NPS's symbol set has no match —
same currentColor stroke style as the rest of icons.js, so they render
monochrome in the dark topbar rather than colored emoji.

sun.js's formatSunInfo now returns {sunrise, sunset, countdown} instead of
one joined string, so map.js can place its own icon in front of each
piece instead of the module owning any markup.

public/js/icons.js

@@ -43,6 +43,25 @@ export const RULER_ICON = `
   <path d="M9 10l1.5 1.5M12 7l1.5 1.5M15 4l1.5 1.5M6 13l1.5 1.5"/>
 </svg>`;
 
+// Toolbar readout glyphs (public/js/sun.js's text, assembled with these by
+// map.js) — same monoline style as the sidebar icons above, no NPS source
+// for either (that set has no sunrise/sunset pictogram).
+export const SUNRISE_ICON = `
+<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round">
+  <path d="M3 18h18"/>
+  <path d="M6 18a6 6 0 0 1 12 0"/>
+  <path d="M12 13V5"/>
+  <path d="M9 8l3-3 3 3"/>
+</svg>`;
+
+export const SUNSET_ICON = `
+<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round">
+  <path d="M3 18h18"/>
+  <path d="M6 18a6 6 0 0 1 12 0"/>
+  <path d="M12 5v8"/>
+  <path d="M9 10l3 3 3-3"/>
+</svg>`;
+
 export const NEW_FOLDER_ICON = `
 <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round">
   <path d="M3 7a2 2 0 0 1 2-2h4l2 2h8a2 2 0 0 1 2 2v8a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V7z"/>