feat: complete deploy demo with React UI

Backend:
- Spring Boot 3.4, Java 21, REST API for app lifecycle
- Build pipeline: JAR → Dockerfile → docker build/push → kubectl apply
- In-memory state with K8s reconciliation on startup
- Configurable via env vars

Frontend:
- React 19 + @cameleer/design-system v0.1.26
- Dashboard table with status polling (5s)
- Deploy dialog with drag-and-drop JAR upload
- Resource limit/request configuration
- Environment variable editor
- Build log viewer
- Delete with confirmation dialog

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/Dashboard.module.css

@@ -0,0 +1,113 @@
+.toolbar {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: 1rem;
+}
+
+.heading {
+  font-size: 1.125rem;
+  font-weight: 600;
+  margin: 0;
+}
+
+.center {
+  display: flex;
+  justify-content: center;
+  padding: 4rem;
+}
+
+.empty {
+  text-align: center;
+  padding: 4rem 2rem;
+  color: var(--text-muted);
+  font-size: 0.875rem;
+}
+
+.table {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 0.8125rem;
+}
+
+.table th {
+  text-align: left;
+  padding: 0.5rem 0.75rem;
+  font-size: 0.6875rem;
+  font-weight: 600;
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+  color: var(--text-muted);
+  border-bottom: 1px solid var(--border-subtle);
+}
+
+.table td {
+  padding: 0.625rem 0.75rem;
+  border-bottom: 1px solid var(--border-subtle);
+  vertical-align: middle;
+}
+
+.table tr:hover td {
+  background: var(--bg-hover);
+}
+
+.appLink {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  color: var(--text-primary);
+  text-decoration: none;
+  font-weight: 500;
+}
+
+.appLink:hover {
+  color: var(--accent);
+}
+
+.resources {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  font-size: 0.75rem;
+  color: var(--text-secondary);
+}
+
+.age {
+  color: var(--text-muted);
+  font-size: 0.75rem;
+  white-space: nowrap;
+}
+
+.actions {
+  display: flex;
+  gap: 0.25rem;
+}
+
+.iconBtn {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 28px;
+  height: 28px;
+  border: none;
+  border-radius: var(--radius-sm);
+  background: none;
+  color: var(--text-muted);
+  cursor: pointer;
+}
+
+.iconBtn:hover {
+  background: var(--bg-hover);
+  color: var(--text-primary);
+}
+
+.errorMsg {
+  display: block;
+  font-size: 0.6875rem;
+  color: var(--error);
+  margin-top: 2px;
+  max-width: 200px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}