fix(desktop): SearchPill hover bounds + AccountSwitcher ripple size

- SearchPill: move hoverHighlight() inside Surface content Row so it's
  clipped to the pill's 36dp height (was drawing on parent Row height)
- AccountSwitcherDropdown: reduce IconButton from 48dp to 40dp so ripple
  circle fits within collapsed sidebar width

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

desktopApp/src/jvmMain/kotlin/com/vitorpamplona/amethyst/desktop/ui/account/AccountSwitcherDropdown.kt

@@ -99,7 +99,7 @@ fun AccountSwitcherDropdown(
     Box(modifier = modifier) {
         IconButton(
             onClick = { expanded = true },
-            modifier = Modifier.size(48.dp),
+            modifier = Modifier.size(40.dp),
         ) {
             Icon(
                 MaterialSymbols.Person,

desktopApp/src/jvmMain/kotlin/com/vitorpamplona/amethyst/desktop/ui/search/SearchPill.kt

@@ -33,7 +33,6 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.draw.clip
 import androidx.compose.ui.unit.dp
 import com.vitorpamplona.amethyst.commons.icons.symbols.Icon
 import com.vitorpamplona.amethyst.commons.icons.symbols.MaterialSymbols
@@ -50,11 +49,11 @@ fun SearchPill(
         onClick = onClick,
         shape = RoundedCornerShape(999.dp),
         color = MaterialTheme.colorScheme.surfaceContainerHigh,
-        modifier = modifier.height(36.dp).clip(RoundedCornerShape(999.dp)).hoverHighlight(),
+        modifier = modifier.height(36.dp),
     ) {
         Row(
             verticalAlignment = Alignment.CenterVertically,
-            modifier = Modifier.padding(horizontal = 12.dp),
+            modifier = Modifier.hoverHighlight().padding(horizontal = 12.dp),
         ) {
             Icon(
                 MaterialSymbols.Search,