Tint the framed-header caption and feature icon on SIMPLEX

On the SIMPLEX theme these two elements still drew in the flat
secondary colour over the sunrise gradient, while every sibling —
the quoted author above the caption, the feature label beside the
icon — already switched to the warm tint made to stay legible on
that gradient. Route both through simplexSecondaryTint(), which
returns the unchanged secondary colour for every other theme.

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/item/CIFeaturePreferenceView.kt

@@ -27,7 +27,7 @@ fun CIFeaturePreferenceView(
     verticalAlignment = Alignment.CenterVertically,
     horizontalArrangement = Arrangement.spacedBy(4.dp)
   ) {
-    Icon(feature.icon, feature.text, Modifier.size(18.dp), tint = MaterialTheme.colors.secondary)
+    Icon(feature.icon, feature.text, Modifier.size(18.dp), tint = simplexSecondaryTint())
     if (contact != null && allowed != FeatureAllowed.NO && contact.allowsFeature(feature) && !contact.userAllowsFeature(feature)) {
       val acceptStyle = SpanStyle(color = MaterialTheme.colors.primary, fontSize = 12.sp)
       val setParam = feature == ChatFeature.TimedMessages && contact.mergedPreferences.timedMessages.userPreference.pref.ttl == null

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/item/FramedItemView.kt

@@ -119,9 +119,10 @@ fun FramedItemView(
           tint = iconColor ?: if (isInDarkTheme()) FileDark else FileLight
         )
       }
+      val captionColor = simplexSecondaryTint()
       Text(
         buildAnnotatedString {
-          withStyle(SpanStyle(fontSize = 12.sp, fontStyle = if (italic) FontStyle.Italic else FontStyle.Normal, color = MaterialTheme.colors.secondary)) {
+          withStyle(SpanStyle(fontSize = 12.sp, fontStyle = if (italic) FontStyle.Italic else FontStyle.Normal, color = captionColor)) {
             append(caption)
           }
         },