Updates to text sizes in Chats header and Space hero

Closes #7476

libraries/matrixui/src/main/kotlin/io/element/android/libraries/matrix/ui/components/SpaceHeaderRootView.kt

@@ -46,7 +46,7 @@ fun SpaceHeaderRootView(
         )
         Text(
             text = stringResource(CommonStrings.screen_space_list_title),
-            style = ElementTheme.typography.fontHeadingLgBold,
+            style = ElementTheme.typography.fontHeadingMdBold,
             color = ElementTheme.colors.textPrimary,
             textAlign = TextAlign.Center,
         )

libraries/matrixui/src/main/kotlin/io/element/android/libraries/matrix/ui/components/SpaceHeaderView.kt

@@ -19,6 +19,7 @@ import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontStyle
 import androidx.compose.ui.tooling.preview.datasource.LoremIpsum
 import androidx.compose.ui.unit.dp
+import io.element.android.compound.theme.ElementTheme
 import io.element.android.libraries.designsystem.atomic.atoms.RoomPreviewAliasAtom
 import io.element.android.libraries.designsystem.atomic.atoms.RoomPreviewDescriptionAtom
 import io.element.android.libraries.designsystem.atomic.atoms.RoomPreviewTitleAtom
@@ -68,11 +69,15 @@ fun SpaceHeaderView(
         },
         title = {
             if (name != null) {
-                RoomPreviewTitleAtom(title = name)
+                RoomPreviewTitleAtom(
+                    title = name,
+                    style = ElementTheme.typography.fontHeadingMdBold,
+                )
             } else {
                 RoomPreviewTitleAtom(
                     title = stringResource(id = CommonStrings.common_no_space_name),
-                    fontStyle = FontStyle.Italic
+                    fontStyle = FontStyle.Italic,
+                    style = ElementTheme.typography.fontHeadingMdBold,
                 )
             }
         },