fix(ui): polish create flows for compose and GitHub repos

Use shared listbox for private-repo selection, align listbox
trigger heights with form inputs, restore compose editor spacing
and full width, and wire loading states on create/continue
actions.

resources/views/livewire/project/new/docker-compose.blade.php

@@ -1,4 +1,4 @@
-<div class="mt-8 w-full max-w-[1180px] lg:mt-3">
+<div class="mt-8 w-full lg:mt-3">
     <form wire:submit="submit">
         <section class="application-settings-section">
             <div class="application-settings-section-header">
@@ -6,9 +6,9 @@
                     <h2>Docker Compose</h2>
                     <p>Create a multi-container service directly from a Compose file.</p>
                 </div>
-                <x-forms.button type="submit" isHighlighted>Create service</x-forms.button>
+                <x-forms.button type="submit" wire:target="submit" isHighlighted>Create service</x-forms.button>
             </div>
-            <div class="application-settings-section-body p-0!">
+            <div class="application-settings-section-body">
                 <x-forms.textarea useMonacoEditor monacoEditorLanguage="yaml" label="Docker Compose file"
                     rows="20" id="dockerComposeRaw" autofocus placeholder='services:
   app: