Fix: Usar UButton para debug y agregar logs de selección de archivos

app/components/messages/MessageInput.vue

@@ -141,13 +141,13 @@
       </div>
 
       <!-- Debug button -->
-      <button
-        @click="showDebug = !showDebug"
-        class="p-2 rounded bg-gray-700 hover:bg-gray-600 text-gray-300"
+      <UButton
+        variant="ghost"
+        icon="i-lucide-bug"
+        class="text-gray-400"
         title="Debug input state"
-      >
-        <UIcon name="i-lucide-bug" class="w-4 h-4" />
-      </button>
+        @click="showDebug = !showDebug"
+      />
 
       <!-- Send / Mic button -->
       <UButton
@@ -322,7 +322,9 @@ const attachmentMenuItems = [
 
 // Methods
 const handleFileSelect = (event: Event, type: string) => {
+  console.log('[MessageInput] handleFileSelect called, type:', type)
   const input = event.target as HTMLInputElement
+  console.log('[MessageInput] input.files:', input.files?.length)
   if (input.files && input.files.length > 0) {
     addFiles(Array.from(input.files))
     input.value = '' // Reset input
@@ -345,15 +347,19 @@ const formatFileSize = (bytes: number): string => {
 }
 
 const addFiles = (files: File[]) => {
+  console.log('[MessageInput] addFiles called with', files.length, 'files')
+
   // Limit to 10 files
   const remaining = 10 - selectedFiles.value.length
   const toAdd = files.slice(0, remaining)
+  console.log('[MessageInput] toAdd:', toAdd.length, 'files')
 
   // Validate file sizes
   const validFiles: File[] = []
   for (const file of toAdd) {
     const mediaType = getFileMediaType(file)
     const maxSize = MAX_SIZES[mediaType]
+    console.log('[MessageInput] Processing file:', file.name, 'type:', mediaType, 'size:', file.size)
 
     if (file.size > maxSize) {
       toast.add({
@@ -367,9 +373,12 @@ const addFiles = (files: File[]) => {
     }
   }
 
+  console.log('[MessageInput] validFiles:', validFiles.length)
+
   if (validFiles.length > 0) {
     // Use spread operator to trigger reactivity
     selectedFiles.value = [...selectedFiles.value, ...validFiles]
+    console.log('[MessageInput] selectedFiles now has', selectedFiles.value.length, 'files')
   }
 }