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/now-playing-view/now-playing-view.ts

@@ -420,11 +420,20 @@ export class NowPlayingView extends LitElement {
                         <h2 class="title" data-testid="npv-title">
                             ${track.title || track.fileName}
                         </h2>
+                        <!-- keepOnPhone: this screen is the phone's,
+                             and it has no context menu to carry the
+                             destination the way a row does (#67).
+                             Suppressing these takes the artist and the
+                             album away rather than moving them, and
+                             they are two lines of their own here
+                             rather than a few characters inside a
+                             row. -->
                         <p class="artist">
                             ${creditLink(
                                 creditStore.credits(track.recordingMbid),
                                 track.artist,
                                 track.artistMbid,
+                                { keepOnPhone: true },
                             )}
                         </p>
                         ${track.album
@@ -434,6 +443,7 @@ export class NowPlayingView extends LitElement {
                                       track.releaseGroupMbid,
                                       undefined,
                                       track.artist,
+                                      { keepOnPhone: true },
                                   )}
                               </p>`
                             : nothing}