fix(desktop): compact text fields + normalize Settings section headers

Text fields:
- Chat input (ChatPane) and Search field (SearchScreen) both used
  M3 OutlinedTextField defaults, which has a 56dp min-height tuned
  for mobile touch. On desktop that reads as "way too tall" — roughly
  double what Slack / Raycast / VS Code show. Overrode with
  Modifier.height(40.dp) / heightIn(min = 40.dp), paired with
  bodyMedium (14sp) textStyle and slightly smaller leading/trailing
  icons so the field sits at a desktop-native ~40dp when empty, still
  grows with content in the chat case.

Settings section headers — normalized to titleSmall (14sp) so every
section sits consistently under the "Settings" titleMedium (16sp)
screen title:
- "Wallet Connect (NWC)" (was titleLarge, already fixed)
- "Relay Settings" (was titleLarge, already fixed)
- "Tor" (was titleLarge, now titleSmall)
- "Media Servers (Blossom)" (was titleMedium, now titleSmall)

MediaServerSettings extra border removed — the parent
RelaySettingsScreen already provides a 12dp horizontal gutter, but
MediaServerSettings was adding another 16dp all-sides padding on top,
showing as a visible inner frame. Dropped that wrapper padding.

https://claude.ai/code/session_01NufduPfZvYQVYwLkbCjCUo

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

@@ -377,28 +377,39 @@ fun SearchScreen(
                         textFieldValue = it
                         state.updateFromText(it.text)
                     },
-                    modifier = Modifier.weight(1f).focusRequester(focusRequester),
-                    placeholder = { Text("Search notes, people, tags... or use operators") },
+                    // .height(40.dp) overrides M3's 56dp min-height (intended for
+                    // mobile touch) — desktop inputs should feel closer to Slack /
+                    // Raycast / VS Code at ~40dp.
+                    modifier = Modifier.weight(1f).height(40.dp).focusRequester(focusRequester),
+                    textStyle = MaterialTheme.typography.bodyMedium,
+                    placeholder = {
+                        Text(
+                            "Search notes, people, tags... or use operators",
+                            style = MaterialTheme.typography.bodyMedium,
+                        )
+                    },
                     leadingIcon = {
                         Icon(
                             MaterialSymbols.Search,
                             contentDescription = "Search",
                             tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                            modifier = Modifier.size(18.dp),
                         )
                     },
                     trailingIcon = {
                         if (displayText.isNotEmpty()) {
-                            IconButton(onClick = { state.clearSearch() }) {
+                            IconButton(onClick = { state.clearSearch() }, modifier = Modifier.size(28.dp)) {
                                 Icon(
                                     MaterialSymbols.Clear,
                                     contentDescription = "Clear",
                                     tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                                    modifier = Modifier.size(18.dp),
                                 )
                             }
                         }
                     },
                     singleLine = true,
-                    shape = RoundedCornerShape(12.dp),
+                    shape = RoundedCornerShape(10.dp),
                 )
                 if (account != null && !account.isReadOnly) {
                     IconButton(onClick = { showRelayPicker = true }) {

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

@@ -30,6 +30,7 @@ import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.heightIn
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
@@ -718,9 +719,13 @@ private fun MessageInput(
             OutlinedTextField(
                 value = messageText,
                 onValueChange = onMessageChange,
+                // heightIn(min = 40.dp) overrides M3's 56dp mobile-touch min so the
+                // chat input sits at a desktop-sensible 40dp when empty; still grows
+                // to up to ~120dp with content via maxLines = 4.
                 modifier =
                     Modifier
                         .weight(1f)
+                        .heightIn(min = 40.dp)
                         .onPreviewKeyEvent { event ->
                             if (event.type != KeyEventType.KeyDown) return@onPreviewKeyEvent false
                             // Cmd+Enter (Mac) or Ctrl+Enter to send
@@ -732,10 +737,16 @@ private fun MessageInput(
                                 false
                             }
                         },
-                placeholder = { Text("Message... (${if (isMacOS) "\u2318" else "Ctrl"}+Enter to send)") },
+                textStyle = MaterialTheme.typography.bodyMedium,
+                placeholder = {
+                    Text(
+                        "Message... (${if (isMacOS) "\u2318" else "Ctrl"}+Enter to send)",
+                        style = MaterialTheme.typography.bodyMedium,
+                    )
+                },
                 singleLine = false,
                 maxLines = 4,
-                shape = RoundedCornerShape(12.dp),
+                shape = RoundedCornerShape(10.dp),
             )
 
             IconButton(

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

@@ -92,10 +92,13 @@ fun MediaServerSettings(
         }
     }
 
-    Column(modifier = modifier.fillMaxWidth().padding(16.dp)) {
+    // Parent (RelaySettingsScreen) provides the 12dp horizontal gutter, so this
+    // column no longer adds its own all-sides 16dp which was showing up as an
+    // extra frame inside the settings screen.
+    Column(modifier = modifier.fillMaxWidth()) {
         Text(
             "Media Servers (Blossom)",
-            style = MaterialTheme.typography.titleMedium,
+            style = MaterialTheme.typography.titleSmall,
         )
 
         Spacer(Modifier.height(8.dp))

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

@@ -70,7 +70,7 @@ fun TorSettingsSection(
             Row(verticalAlignment = Alignment.CenterVertically) {
                 Text(
                     "Tor",
-                    style = MaterialTheme.typography.titleLarge,
+                    style = MaterialTheme.typography.titleSmall,
                     color = MaterialTheme.colorScheme.onBackground,
                 )
                 Spacer(Modifier.width(12.dp))