[fix] resolve cross-platform build warnings

apps/desktop/src/gui/ui/file_browser.slint

@@ -601,6 +601,9 @@ export component FileBrowserWindow inherits Window {
     SurfaceSeparator { x: 0px; y: 0px; width: parent.width; }
     focus := FocusScope {
         focus-on-click: true;
+        // Window sizing is defined above. Keep its layout constraints separate
+        // from children whose dimensions adapt to the current window size.
+        x: 0px; y: 0px; width: root.width; height: root.height;
         key-pressed(event) => {
             if event.text == Key.Escape { root.cancel-drag(); return accept; }
             reject

apps/desktop/src/gui/ui/trusted_devices.slint

@@ -141,7 +141,6 @@ export component TrustedDevicesDialog inherits Rectangle {
             // Extend into the right margin to preserve the existing card width.
             width: parent.width - 56px + dialog.scrollbar-gutter;
             height: parent.height - 84px;
-            min-width: 0px; min-height: 0px;
             horizontal-scrollbar-policy: always-off;
             vertical-scrollbar-policy: as-needed;
             viewport-width: self.visible-width;