Show the tree's file names without the .geojson suffix

The suffix ("ride.gpx" -> "ride.gpx.geojson" once cached) explained
what the name would download back when it doubled as a GeoJSON-only
download link. Now that downloading is the download button's job
(previous commit), it was just confusing -- the file itself is still
named "ride.gpx".

docs/architecture.adoc

@@ -338,18 +338,18 @@ app, and not yet opened. Badging the common case would just be noise,
 so the file tree's icon (`PENDING_ICON`, `public/js/icons.js`) marks
 that exception instead of the (near-universal) ready state.
 +
-Once a `.gpx`/`.fit` is cached, the tree shows it under its converted
-name instead — `"ride.gpx"` reads as `"ride.gpx.geojson"`, matching
-the real cache file sitting next to it on disk — since the GeoJSON,
-not the original, is what's actually rendered on the map from that
-point on. Plain text now, not a link — see below. The original is
-never deleted or re-parsed once cached, just not re-shown as itself,
-so both forms need a way out of the app as an actual file: one
-download button, next to delete, opens a small menu ("Original file" /
-"GeoJSON", `_downloadButton`/`_downloadMenuItem`) rather than the name
-doubling as a GeoJSON-only download link the way it briefly did — that
-was easy to miss as a link at all, and only ever covered half of
-what's downloadable. Only one menu open at a time
+The tree always shows a `.gpx`/`.fit` file under its real, as-uploaded
+name, even once cached — it briefly grew a `.geojson` suffix there
+(matching the real cache file's name on disk) back when the name
+doubled as a GeoJSON-only download link and the suffix explained what
+clicking it would get you; now that downloading is the download
+button's job (below), the suffix was just confusing; the file itself
+is still named `"ride.gpx"`. The original is never deleted or
+re-parsed once cached, just not re-shown as itself once the GeoJSON
+becomes what's actually rendered on the map, so both forms need a way
+out of the app as an actual file: one download button, next to
+delete, opens a small menu ("Original file" / "GeoJSON",
+`_downloadButton`/`_downloadMenuItem`). Only one menu open at a time
 (`_toggleDownloadMenu`/`_closeDownloadMenu`), closed by a
 document-level click listener the same way an outside click closes a
 `sidebar-flyout` dropdown, just scoped to this one control rather than

public/js/gpx.js

@@ -296,20 +296,16 @@ export class GpxPanelControl {
     checkbox.type = "checkbox";
     checkbox.checked = this._visible.has(file.path);
     checkbox.addEventListener("change", () => this._toggleFile(file.path, checkbox.checked, checkbox));
-    // Once a .gpx/.fit is cached, its converted GeoJSON is the thing that's
-    // actually shown on the map from here on (see GpxStore#geojson) — the
-    // name reflects that (matching the real "<path>.geojson" cache file on
-    // disk) rather than still reading as a plain, un-converted .gpx/.fit.
-    // A direct .geojson upload already ends in .geojson, so it's left
-    // alone. Plain text, not a link — downloading is the download button's
-    // job now (see below), one obvious place instead of two differently-
-    // shaped ones (the name used to double as a GeoJSON-only download
-    // link, easy to miss and only half the story).
-    const displayName = file.cached && !file.name.toLowerCase().endsWith(".geojson") ? `${file.name}.geojson` : file.name;
+    // Just the real, as-uploaded name — it used to grow a ".geojson" suffix
+    // once cached (matching the real "<path>.geojson" cache file on disk),
+    // back when the name doubled as a GeoJSON-only download link and the
+    // suffix explained what clicking it would get you. Now that downloading
+    // is the download button's job (see below), that suffix was just
+    // confusing: the file is still named "ride.gpx", not "ride.gpx.geojson".
     const loggedIn = isLoggedIn();
     const name = document.createElement("span");
     name.className = "gpx-tree__file-name";
-    name.textContent = displayName;
+    name.textContent = file.name;
     label.appendChild(checkbox);
     (file.kinds || []).forEach((kind) => label.appendChild(this._kindIcon(kind)));
     if (!file.cached) label.appendChild(this._pendingIcon());