settings: one snackbar for every page's messages

Save, apply and upload results went to the page header, one line capped
at 420px and cut with an ellipsis. They now go to a snackbar at the foot
of the settings window, wrapped in full: green fades after 6s, yellow and
red stay until dismissed or replaced, and changing page clears it.

Snack.qml is the singleton pages call (ok, wait, error); Snackbar.qml
draws it once in Settings.qml. SaveBar forwards its notice and error, so
the 24 pages using it change nothing; the header keeps only the draft's
state. The boot logo page calls Snack directly.

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

2 files changed, 4 insertions, 13 deletions

diff --git a/desktop/modules/sonix/BootlogoModule.qml b/desktop/modules/sonix/BootlogoModule.qml
index 8778ce3..ea39376 100644
--- a/desktop/modules/sonix/BootlogoModule.qml
+++ b/desktop/modules/sonix/BootlogoModule.qml
@@ -28,7 +28,7 @@ Module {
             actions: Component {
                 Row {
                     spacing: 8
-                    // The status is in the page, under Output, where it wraps.
+                    // Results go to the window's snackbar (Snack.qml).
                     Button {
                         text: tab.busy ? "Busy…" : "Save"
                         enabled: tab.canSave
diff --git a/desktop/modules/sonix/BootlogoTab.qml b/desktop/modules/sonix/BootlogoTab.qml
index 4a34dc7..96454a2 100644
--- a/desktop/modules/sonix/BootlogoTab.qml
+++ b/desktop/modules/sonix/BootlogoTab.qml
@@ -37,10 +37,10 @@ Row {
 
     property bool busy: false
     property bool waiting: false
-    property string status: ""
-    property bool statusError: false
     readonly property bool canSave: canvas.ready && !tab.busy
-    function say(t, err) { tab.status = t; tab.statusError = !!err; }
+    // To the window's snackbar (Snack.qml): yellow while waiting for Wi-Fi
+    // transfer, red on failure, green otherwise.
+    function say(t, err) { if (tab.waiting) Snack.wait(t); else if (err) Snack.error(t); else Snack.ok(t); }
 
     readonly property var swatches: ["#ffffff", "#000000", "#3584e4", "#ff7800", "#e5a50a",
                                      "#2ec27e", "#9141ac", "#d56199", "udt"]
@@ -319,15 +319,6 @@ Row {
             enabled: Sonix.present && !tab.busy && !tab.waiting
             onClicked: pickSaved.open()
         }
-        // Save and upload results, in full: the header has no room for them.
-        Text {
-            visible: tab.status !== ""
-            width: parent.width
-            wrapMode: Text.Wrap
-            text: tab.status
-            font { family: Theme.fontFamily; pixelSize: Theme.fontSize - 3 }
-            color: tab.waiting ? Theme.yellow : tab.statusError ? Theme.red : Theme.green
-        }
         Text {
             width: parent.width
             wrapMode: Text.Wrap