feat(FN-3109): add Docker connectivity service and target selector UI

This merge adds Docker connectivity management to Fusion (FN-3109), introducing a Docker client service in `@fusion/core` with typed interfaces for daemon connection configuration (host, socket path, TLS). The dashboard gains a `DockerTargetSelector` component for choosing between local socket and T

Fusion-Task-Id: FN-3109

packages/dashboard/app/components/DockerTlsConfig.css

@@ -0,0 +1,26 @@
+.docker-tls-config {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-md);
+}
+
+.docker-tls-config__fields {
+  display: grid;
+  gap: var(--space-md);
+}
+
+.docker-tls-config__field {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-xs);
+}
+
+.docker-tls-config__field label {
+  color: var(--text-muted);
+}
+
+@media (max-width: 768px) {
+  .docker-tls-config .input {
+    min-height: calc(var(--mobile-nav-height) - var(--space-sm));
+  }
+}