Add font picker (Segoe UI, Tahoma, Tw Cen MT, Nunito, Quicksand, Varela Round), bump to 0.1.10

Each channel window's settings panel gets a Font list, and wIRC main gets a Font
button that opens the same list for the server messages box. Every name is drawn
in its own font as a preview. The choice is saved per window in window_prefs.json
(fontId) and applies to the scrollback, user list, input box and title.

- Segoe UI, Tahoma and Tw Cen MT are Microsoft-licensed, so they aren't bundled:
  they load from the Windows font folders at runtime and are only listed when
  present (Tw Cen MT comes with Office).
- Nunito, Quicksand and Varela Round are SIL OFL fonts, bundled in
  resources/fonts with their license files.
- A missing or unloadable font falls back to Monospace.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/main/kotlin/ui/MainScreen.kt

@@ -43,8 +43,10 @@ fun MainScreen(
     displaySettings: WindowDisplaySettings,
     onOpenChannel: (serverId: String, channelName: String) -> Unit,
     onExitApp: () -> Unit,
-    onUnreadChange: (Int) -> Unit
+    onUnreadChange: (Int) -> Unit,
+    onFontChange: (String) -> Unit
 ) {
+    var showFontDialog by remember { mutableStateOf(false) }
     var servers by remember { mutableStateOf(repo.loadAll()) }
     var showAddDialog by remember { mutableStateOf(false) }
     var editingServer by remember { mutableStateOf<ServerConfig?>(null) }
@@ -87,6 +89,12 @@ fun MainScreen(
                     Text("+ Add Server")
                 }
                 Spacer(Modifier.width(8.dp))
+                // Font for the server messages box (channel windows pick theirs in their own
+                // settings).
+                TextButton(onClick = { showFontDialog = true }) {
+                    Text("Font")
+                }
+                Spacer(Modifier.width(8.dp))
                 // Disconnects every server and terminates the process. (A bare "/quit" in a
                 // channel window only disconnects that window's server.)
                 TextButton(onClick = onExitApp) {
@@ -187,6 +195,25 @@ fun MainScreen(
         )
     }
 
+    if (showFontDialog) {
+        DialogWindow(
+            onCloseRequest = { showFontDialog = false },
+            title = "wIRC main font",
+            state = rememberDialogState(size = DpSize(300.dp, 360.dp)),
+            resizable = true
+        ) {
+            MaterialTheme(colorScheme = colorScheme) {
+                Surface {
+                    Column(modifier = Modifier.fillMaxSize().padding(8.dp).verticalScroll(rememberScrollState())) {
+                        Text("Server messages font:", color = textColor, style = MaterialTheme.typography.bodySmall)
+                        Spacer(Modifier.height(4.dp))
+                        FontPickerList(displaySettings.fontId, textColor, onFontChange)
+                    }
+                }
+            }
+        }
+    }
+
     if (showAddDialog) {
         ServerEditDialog(
             existing = editingServer,