android: the first run — a folder to keep music in, and an account to reach the network

Nobody had seen this app on a phone that has just installed it. On Android
the library root is never missing — config.rs falls back to the app's own
sandbox, a real folder nothing else can see — so "no folder yet" cannot be
a null check, and setup_done has never been written by the phone, so every
phone in existence reads as unstamped, Kyle's included. The tour therefore
opens on three clauses, not one: no flag, no saved account, and no records,
read only after the library and the credentials have both answered. Two
cards, skippable, and no password anywhere in it — the Soulseek step goes
to the card on Community and stops.

Every screen that is empty because of those two things now says so with the
row that fixes it: Home (whose copy predated the folder picker), Library →
Albums, Library → Artists, which had no empty state at all, and Search,
where a flat sentence about signing in became the row that does it. A row
goes away because the config moved, so the two doors onto the same folder
tell each other — You re-reads when the tour moves it, the tour's store is
told when You's own picker does — and the all-files row re-reads the grant
when the system screen hands the app back, the way You already did.

You → This phone opens the tour again as a preview that reads the config
and writes nothing, which is the door the phone walk drives on Kyle's own
device. The mock can answer as a fresh install now — an empty database, no
account, no permission, the sandbox root — so the whole thing is walked end
to end, and two commands that had no mock at all (player_control,
open_external) got one on the way past. It is the mock walk's first reload,
which turned up two things a reload does not clear by itself: the player
writes the session back on pagehide, so the fresh block clears it from a
pagehide listener of its own, and the viewport emulation lives on the
DevTools session, so the harness hands it back after the re-attach.

src/mobile/shell.css

@@ -1563,3 +1563,29 @@ html[data-motion="off"] *, html[data-motion="off"] *::before, html[data-motion="
    (`.m mono`, which .row does not give a face — leave that as it is rather
    than making these two rows disagree). */
 .row.folder-gone .t { color: #ffb4b4; }
+
+/* ── the first run ───────────────────────────────────────────────────────
+   A phone that has just installed the app: the tour's sheet, and the note
+   the screens that are empty BECAUSE of it carry. Both are the app's own
+   parts — .sheet-sec, .sheet-rows, .row, .stub — so there is almost nothing
+   here: the folder's path, the foot's button, and the note's rows pulled
+   out to the card's own edge so they read as part of the message rather
+   than as a second card floating under it. */
+.setup-path {
+    padding: 0 var(--pad) 10px;
+    font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
+    font-size: 11.5px;
+    color: var(--text-muted);
+    word-break: break-all;
+}
+.setup-foot { padding: 10px var(--pad) 4px; }
+
+/* the note: one message, with the rows that answer it under a hairline */
+.setup-note .setup-rows {
+    margin: 12px -16px 0;
+    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
+}
+.setup-note .setup-rows .row { padding: 10px 16px; }
+.setup-note .setup-rows .row + .row { box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.055); }
+.setup-note .setup-rows .row .t { font-size: 13.5px; }
+.setup-note .setup-rows .row .m { font-size: 12px; }