feat(android): a name is not a link on a phone, the menu carries it

Every track, album and artist name in the app navigates through
`utils/explore-link.ts`, and every sentence of how it does that is a
desktop compromise: the navigation is held for one double-click
interval so double-clicking the row can still play it, and the target
is a few characters of text inside a row. On touch that is a delay on
an ambiguous target, and since #63 the row's own tap claims the click
anyway -- so the link was unreachable as well as fiddly.

So below the phone breakpoint a name renders as plain text and the
row's context menu carries the destination instead: `go-to-menu.ts`
draws "Go to Artist" / "Go to Album" under exactly the condition the
link is not, using `explore-link`'s own exported routing so an untagged
entity reaches the library page by the same lookup.

Three things this leans on. Suppressing a link with no menu behind it
is not a smaller affordance but a destination the phone cannot reach,
so `keepOnPhone` is the exception for the three surfaces with no row
menu. The items are drawn for a single selection only, which is the
Play item's rule one step on. And there is no "Go to Genre", because
no row renders a genre link to lose -- that would be new navigation
rather than a replacement.

Closes #67

frontend/src/components/track-list/track-list.ts

@@ -51,6 +51,8 @@ import {
     trackLink,
     exploreLinkStyles,
 } from '@utils/explore-link';
+import { goToMenuItems } from '@utils/go-to-menu';
+import type { GoToTarget } from '@utils/go-to-menu';
 import {
     setDragPayload,
     emitDragActive,
@@ -1954,6 +1956,33 @@ export class TrackList
         emitDragActive(false);
     };
 
+    /**
+     * The row the menu can navigate from, for "Go to Artist" / "Go to
+     * Album" — which exist only below the phone breakpoint, where the
+     * row's own names are no longer links (#67).
+     *
+     * One row only, on the rule the Play item already states: one row
+     * is a position, several are an explicit choice of *those* tracks,
+     * and "go to the album" of five different albums means nothing.
+     */
+    private get goToTarget(): GoToTarget | undefined {
+        if (this.selection.selectionCount !== 1) return undefined;
+
+        const [path] = this.selection.selectedItems;
+        const track = path
+            ? tracksByFilePath(this.tracks).get(path)
+            : undefined;
+
+        if (!track) return undefined;
+
+        return {
+            artistName: track.ArtistName,
+            artistMBID: track.ArtistMBID,
+            albumName: track.Album,
+            albumMBID: track.ReleaseGroupMBID,
+        };
+    }
+
     private onContextMenuAction(action: string) {
         const filePaths =
             this.selection.getSelectedKeysOrdered();
@@ -2563,6 +2592,13 @@ export class TrackList
                     ></wa-icon>
                     Track Details
                 </wa-dropdown-item>
+                ${goToMenuItems(this.goToTarget, {
+                    onSelect: () => {
+                        this.selection.clear();
+                        this.ctxMenu.close();
+                    },
+                    onHover: () => this.ctxMenu.closePlaylistSubmenu(),
+                })}
                 <wa-dropdown-item
                     @click=${() =>
                         this.onContextMenuAction(