fix(desktop): clip card ripples to card shape via Card(onClick = ...)

Material3 Card has a built-in onClick parameter that handles the
ripple with proper rounded-corner clipping. Using Modifier.clickable
on the Card's modifier bypasses that — the ripple renders as a
rectangle and gets awkwardly cut off at the card corners.

Converted to the onClick-parameter form on:
- LongFormCard (Reads)
- DraftCard (Drafts)
- RelayMetricCard (Relay Dashboard / Monitor tab)

NoteCard intentionally left unchanged: its inner clickable covers
only the header+text region (not the action-buttons row), so a
full-card onClick would conflict with the per-action handlers.

https://claude.ai/code/session_01NufduPfZvYQVYwLkbCjCUo

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

@@ -20,7 +20,6 @@
  */
 package com.vitorpamplona.amethyst.desktop.ui
 
-import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
@@ -152,7 +151,8 @@ private fun DraftCard(
     onDelete: () -> Unit,
 ) {
     Card(
-        modifier = Modifier.fillMaxWidth().clickable(onClick = onClick),
+        onClick = onClick,
+        modifier = Modifier.fillMaxWidth(),
         colors =
             CardDefaults.cardColors(
                 containerColor = MaterialTheme.colorScheme.surface,

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

@@ -98,10 +98,8 @@ fun LongFormCard(
     val publishedAt = event.publishedAt() ?: event.createdAt
 
     Card(
-        modifier =
-            Modifier
-                .fillMaxWidth()
-                .clickable(onClick = onClick),
+        onClick = onClick,
+        modifier = Modifier.fillMaxWidth(),
         colors =
             CardDefaults.cardColors(
                 containerColor = MaterialTheme.colorScheme.surface,

desktopApp/src/jvmMain/kotlin/com/vitorpamplona/amethyst/desktop/ui/relay/RelayMetricCard.kt

@@ -21,7 +21,6 @@
 package com.vitorpamplona.amethyst.desktop.ui.relay
 
 import androidx.compose.animation.AnimatedVisibility
-import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -63,9 +62,9 @@ fun RelayMetricCard(
         value = nip11Fetcher.fetch(status.url)
     }
 
-    Card(modifier = modifier.fillMaxWidth()) {
+    Card(onClick = onToggleExpand, modifier = modifier.fillMaxWidth()) {
         Column(
-            modifier = Modifier.clickable { onToggleExpand() }.padding(12.dp),
+            modifier = Modifier.padding(12.dp),
         ) {
             Row(
                 modifier = Modifier.fillMaxWidth(),