fix(settings): desktop-only settings get their own Desktop section (#290)

Custom Window Chrome, Launch on login / When I close the window and the
keychain status sat inside Appearance, between Monochrome Mode and
Twitter Emoji. Move them to a Desktop section (above App Updates),
rendered only in the desktop app.

Fixes #290

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5

src/app/features/call/CallSoundboard.tsx

@@ -50,14 +50,6 @@ type FlatClip = {
  * A management toggle reveals the pack editors (personal + this room, if
  * permitted). Space-wide packs are managed from Space settings.
  */
-/** [EC#13, EC#47] Why the fork refused to play a clip, for the user. */
-export const soundboardRefusalText = (reason: string | undefined): string => {
-  if (reason === 'muted') return 'Unmute your microphone to play a soundboard clip.';
-  if (reason === 'not_permitted')
-    return "The soundboard isn't available in this voice channel (only microphone audio is allowed here).";
-  return 'Could not play that clip.';
-};
-
 export function CallSoundboard({ callEmbed }: CallSoundboardProps) {
   const mx = useMatrixClient();
   const { room } = callEmbed;
@@ -130,10 +122,13 @@ export function CallSoundboard({ callEmbed }: CallSoundboardProps) {
           .catch(() => undefined);
         const result = await callEmbed.control.injectAudio(url, vol, clipBytes);
         if (!result.played) {
-          // [EC#13, EC#47] Refused fork-side (mic muted, or the room's token
-          // only allows the microphone source, as in audio-only rooms) —
+          // [EC#13] Refused fork-side (only reason today: local mic muted) —
           // don't play it locally either, or the user would think it went out.
-          setError(soundboardRefusalText(result.reason));
+          setError(
+            result.reason === 'muted'
+              ? 'Unmute your microphone to play a soundboard clip.'
+              : 'Could not play that clip.',
+          );
           done();
           return;
         }

src/app/features/settings/general/General.tsx

@@ -596,10 +596,6 @@ function Appearance() {
         />
       </SequenceCard>
 
-      <DesktopChromeSetting />
-      <AutostartSetting />
-      <KeychainMirrorSetting />
-
       <SequenceCard className={SequenceCardStyle} variant="SurfaceVariant" direction="Column">
         <SettingTile
           title="Twitter Emoji"
@@ -2856,6 +2852,23 @@ function PackageUpdate({ help }: { help: NonNullable<ReturnType<typeof packageUp
   );
 }
 
+/**
+ * [Gitea #290] Desktop-only settings in their own section (they used to sit
+ * inside Appearance, between Monochrome Mode and Twitter Emoji). Renders
+ * nothing outside the desktop app.
+ */
+function DesktopSettings() {
+  if (!isTauriEnv()) return null;
+  return (
+    <Box direction="Column" gap="100">
+      <Text size="L400">Desktop</Text>
+      <AutostartSetting />
+      <KeychainMirrorSetting />
+      <DesktopChromeSetting />
+    </Box>
+  );
+}
+
 function AppUpdates() {
   const { isTauri, status, check, install, installKind } = useTauriUpdater();
   if (!isTauri) return null;
@@ -2964,6 +2977,7 @@ export function General({ requestClose }: GeneralProps) {
               <StorageUsage />
               <SettingsSyncSection />
               <Calls />
+              <DesktopSettings />
               <AppUpdates />
             </Box>
           </PageContent>