sonix: say why a folder of non-music files looks empty

SonixLink's browse lists only folders and playable files, so Bootlogo or
Ebook read as empty. The Folders tab now says so and links to Wi-Fi
transfer.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/desktop/modules/sonix/SonixFolders.qml b/desktop/modules/sonix/SonixFolders.qml
index 8d94a73..486a5c2 100644
--- a/desktop/modules/sonix/SonixFolders.qml
+++ b/desktop/modules/sonix/SonixFolders.qml
@@ -186,6 +186,25 @@ Column {
         }
     }
 
+    // SonixLink lists only folders and what the player can play, so a folder
+    // of pictures or books reads as empty. Wi-Fi transfer shows everything.
+    Column {
+        visible: fo.root !== "" && fo.entries.length === 0 && fo.error === ""
+        width: fo.width
+        spacing: 6
+        Text {
+            width: parent.width
+            wrapMode: Text.Wrap
+            text: "Only music files are listed here. Other files: Open Wi-Fi transfer (its page must be open on the player)."
+            font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 3 }
+            color: Theme.subtext
+        }
+        Button {
+            text: "Open Wi-Fi transfer"
+            onClicked: Qt.openUrlExternally(`http://${Sonix.host}/`)
+        }
+    }
+
     Text {
         textFormat: Text.PlainText
         visible: fo.notice !== "" && fo.error === ""