ConnectMobileView: move footer + spacer out of "this device name" SectionView lambda

Same pre-card-chrome pattern: SectionTextFooter and SectionDividerSpaced
were inside the SectionView around DeviceNameField + multicast toggle,
so they rendered inside the white card after PR #6777 — visible as an
extra empty padding below the "Discoverable via local network" toggle
(the SectionDividerSpaced 10dp Spacer inside the card).

Move both outside the SectionView so the footer reads as caption below
the card and the spacer separates this card from the next.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/remote/ConnectMobileView.kt

@@ -94,12 +94,12 @@ fun ConnectMobileLayout(
     AppBarTitle(stringResource(if (remember { chatModel.remoteHosts }.isEmpty()) MR.strings.link_a_mobile else MR.strings.linked_mobiles))
     SectionView(generalGetString(MR.strings.this_device_name).uppercase()) {
       DeviceNameField(deviceName.value ?: "") { updateDeviceName(it) }
-      SectionTextFooter(generalGetString(MR.strings.this_device_name_shared_with_mobile))
       PreferenceToggle(stringResource(MR.strings.multicast_discoverable_via_local_network), checked = remember { controller.appPrefs.offerRemoteMulticast.state }.value) {
         controller.appPrefs.offerRemoteMulticast.set(it)
       }
-      SectionDividerSpaced()
     }
+    SectionTextFooter(generalGetString(MR.strings.this_device_name_shared_with_mobile))
+    SectionDividerSpaced()
     SectionView(stringResource(MR.strings.devices).uppercase()) {
       if (chatModel.localUserCreated.value == true) {
         SettingsActionItemWithContent(text = stringResource(MR.strings.this_device), icon = painterResource(MR.images.ic_desktop), click = connectDesktop) {