fix(ui): Don't convert form inputs from string

Action, connector, MCP, dynamic prompts and anything else that is
stored as an array in the config; their fields are always stored
as string by the backend.

Signed-off-by: Richard Palethorpe <io@richiejp.com>

webui/react-ui/src/components/ConfigForm.jsx

@@ -62,10 +62,10 @@ const ConfigForm = ({
     const item = items[index];
     const config = parseConfig(item);
     
-    // Convert value to number if it's a number input
+    if (type === 'checkbox')
-    const processedValue = type === 'number' ? Number(value) : value;
+      config[key] = checked ? 'true' : 'false';
-    
+    else
-    config[key] = type === 'checkbox' ? checked : processedValue;
+      config[key] = value;
     
     onChange(index, {
       ...item,