feat: moving from Gaming on NVIDIA keeps how Steam started: Big Picture boots into gaming mode, otherwise the desktop

lib/menu.sh

@@ -184,8 +184,17 @@ detect_components() {
         component_available "$c" || continue
         { feature_outdated "$c" || feature_new "$c"; } && WANTED[$c]=1
     done
-    # "Gaming on NVIDIA" was on: its replacement, the SteamOS conversion, comes with the defaults of a first run.
-    nvidia_migration_pending && WANTED[glyphs]=1
+    # "Gaming on NVIDIA" was on: its replacement, the SteamOS conversion, comes with the defaults of a first run, and the
+    # PC starts the way it did: Steam in Big Picture at login becomes booting into gaming mode, any other Steam start
+    # (a normal window, or silent in the tray) becomes booting into the desktop, with the silent start kept.
+    if nvidia_migration_pending; then
+        WANTED[glyphs]=1
+        if bigpicture_status; then WANTED[boot]=0
+        else
+            WANTED[boot]=1
+            nvsilent_status && WANTED[silent]=1
+        fi
+    fi
     # The kernel pin is no longer needed (the power-off fix), and HDMI
     # refresh boost needed the pin: whatever is left of either is unticked,
     # so a normal run removes it.

ui/qml/AppState.qml

@@ -65,7 +65,8 @@ Item {
         var w = {};
         for (var i = 0; i < items.length; i++) w[items[i].id] = items[i].kind === "action" ? false : items[i].wanted;
         want = w;
-        boot = nowOn("boot") ? "desktop" : "gamescope";
+        // (What the PC has, or what the backend ticked: "Gaming on NVIDIA" moving to the conversion keeps how Steam started.)
+        boot = want.boot ? "desktop" : "gamescope";
         if (sel > rows.length) sel = 0;
     }
     Connections { target: backend; function onStatusChanged() { if (app.screen === "menu" || app.screen === "done") app.syncFromStatus(); } }