Badge the exception (not yet cached) instead of the near-universal case

GpxStore#save converts eagerly, so "cached" is true for nearly every
file in the tree already — badging that was just noise. Flipped to
PENDING_ICON, shown only for the rare case: a .gpx/.fit dropped
straight into data/gpx/ on the filesystem, bypassing the app, and not
yet opened.

Also add an explicit download button next to delete (DOWNLOAD_ICON) —
the file name itself has been a download link since the last commit,
but isn't obviously clickable at a glance.

public/js/gpx.js

@@ -6,7 +6,8 @@ import {
   WAYPOINT_ICON,
   TRACK_ICON,
   ROUTE_ICON,
-  GEOJSON_ICON,
+  PENDING_ICON,
+  DOWNLOAD_ICON,
   MAP_MARKER_ICON,
   POI_ICONS,
   PARK4NIGHT_TAGS,
@@ -290,9 +291,10 @@ export class GpxPanelControl {
     name.title = `Download ${displayName}`;
     label.appendChild(checkbox);
     (file.kinds || []).forEach((kind) => label.appendChild(this._kindIcon(kind)));
-    if (file.cached) label.appendChild(this._cachedIcon());
+    if (!file.cached) label.appendChild(this._pendingIcon());
     label.appendChild(name);
     row.appendChild(label);
+    row.appendChild(this._downloadButton(file));
     row.appendChild(this._deleteButton(() => this._deleteFile(file.path)));
 
     return row;
@@ -314,14 +316,26 @@ export class GpxPanelControl {
     return icon;
   }
 
-  _cachedIcon() {
+  _pendingIcon() {
     const icon = document.createElement("span");
     icon.className = "gpx-tree__kind-icon";
-    icon.innerHTML = GEOJSON_ICON;
-    icon.title = "Ready to view instantly (GeoJSON cached)";
+    icon.innerHTML = PENDING_ICON;
+    icon.title = "Not yet converted — dropped straight into data/gpx/, not uploaded through the app";
     return icon;
   }
 
+  // Same destination as clicking the file's name (gpxFileUrl + ?download=1)
+  // — a second, more obviously clickable entry point for the same action.
+  _downloadButton(file) {
+    const link = document.createElement("a");
+    link.className = "gpx-tree__download";
+    link.href = `${gpxFileUrl(file.path)}?download=1`;
+    link.title = "Download GeoJSON";
+    link.setAttribute("aria-label", "Download GeoJSON");
+    link.innerHTML = DOWNLOAD_ICON;
+    return link;
+  }
+
   _deleteButton(onClick) {
     const button = document.createElement("button");
     button.type = "button";