Fix missing input source in dropdown and update metadata

- Add current input to options if monitor doesn't report it in possible values
- Never hide the currently active input port in config filtering
- Make GetInputSourceName public for reuse
- Update company to MarketAlly, author to David H. Friedel Jr
- Add application icon to exe

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Library/Config/MonitorConfigManager.cs

@@ -86,7 +86,8 @@ public static class MonitorConfigManager
 
     public static List<InputSourceOption> ApplyConfigToOptions(
         string serialNumber,
-        List<InputSourceOption> options)
+        List<InputSourceOption> options,
+        int? currentInput = null)
     {
         var monitorConfig = GetMonitorConfig(serialNumber);
 
@@ -101,8 +102,11 @@ public static class MonitorConfigManager
 
             if (portConfig != null)
             {
-                // Respect hidden setting - don't show hidden ports
-                if (portConfig.IsHidden)
+                // Never hide the currently active input - user needs to see what's selected
+                bool isCurrentInput = currentInput.HasValue && option.Value == currentInput.Value;
+
+                // Respect hidden setting - don't show hidden ports (unless it's the current input)
+                if (portConfig.IsHidden && !isCurrentInput)
                     continue;
 
                 if (!string.IsNullOrWhiteSpace(portConfig.CustomLabel))