fix: resolve Docker validation race conditions and sudo prefix bug

- Fix sudo prefix bug: Use word boundary matching to prevent 'do' keyword from matching 'docker' commands
- Add ensureProxyNetworksExist() helper to create networks before docker compose up
- Ensure networks exist synchronously before dispatching async proxy startup to prevent race conditions
- Update comprehensive unit tests for sudo parsing (50 tests passing)

This resolves issues where Docker commands failed to execute with sudo on non-root servers and where proxy networks were not created before the proxy container started.

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

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

app/Livewire/Server/ValidateAndInstall.php

@@ -206,6 +206,9 @@ class ValidateAndInstall extends Component
                 if (! $proxyShouldRun) {
                     return;
                 }
+                // Ensure networks exist BEFORE dispatching async proxy startup
+                // This prevents race condition where proxy tries to start before networks are created
+                instant_remote_process(ensureProxyNetworksExist($this->server)->toArray(), $this->server, false);
                 StartProxy::dispatch($this->server);
             } else {
                 $requiredDockerVersion = str(config('constants.docker.minimum_required_version'))->before('.');