fix(ui): polish create flows and terminal navigation

Open the global terminal outside Livewire navigation, clarify that
image tag and SHA256 digest are mutually exclusive, inset the GitLab
empty state, and show loading on Dockerfile create. Add regression tests.

tests/Feature/RealtimeTerminalPackagingTest.php

@@ -15,6 +15,18 @@ it('renders the resource terminal shell while containers are discovered', functi
         ->not->toContain('<x-loading text="Loading containers" />');
 });
 
+it('provides opt-in diagnostics for connected terminal theme changes', function () {
+    $terminalClient = file_get_contents(resource_path('js/terminal.js'));
+
+    expect($terminalClient)
+        ->toContain('terminal-debug')
+        ->toContain("'[Terminal Theme] Applying theme'")
+        ->toContain("'[Terminal Theme] Theme applied'")
+        ->toContain('requestedTheme: themeName')
+        ->toContain('shellTheme: shell?.dataset.consoleTheme')
+        ->toContain("getComputedStyle(shell, '::before').background");
+});
+
 it('starts a single discovered resource container without waiting for a missed browser event', function () {
     $terminalComponent = file_get_contents(app_path('Livewire/Project/Shared/ExecuteContainerCommand.php'));
     $terminalView = file_get_contents(resource_path('views/livewire/project/shared/execute-container-command.blade.php'));