Add React UI with Execution Explorer, auth, and standalone deployment

- Scaffold Vite + React + TypeScript frontend in ui/ with full design
  system (dark/light themes) matching the HTML mockups
- Implement Execution Explorer page: search filters, results table with
  expandable processor tree and exchange detail sidebar, pagination
- Add UI authentication: UiAuthController (login/refresh endpoints),
  JWT filter handles ui: subject prefix, CORS configuration
- Shared components: StatusPill, DurationBar, StatCard, AppBadge,
  FilterChip, Pagination — all using CSS Modules with design tokens
- API client layer: openapi-fetch with auth middleware, TanStack Query
  hooks for search/detail/snapshot queries, Zustand for state
- Standalone deployment: Nginx Dockerfile, K8s Deployment + ConfigMap +
  NodePort (30080), runtime config.js for API base URL
- Embedded mode: maven-resources-plugin copies ui/dist into JAR static
  resources, SPA forward controller for client-side routing
- CI/CD: UI build step, Docker build/push for server-ui image, K8s
  deploy step for UI, UI credential secrets

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ui/src/components/shared/shared.module.css

@@ -0,0 +1,201 @@
+/* ─── Status Pill ─── */
+.statusPill {
+  display: inline-flex;
+  align-items: center;
+  gap: 5px;
+  padding: 3px 10px;
+  border-radius: 99px;
+  font-size: 11px;
+  font-weight: 600;
+  letter-spacing: 0.3px;
+}
+
+.statusDot {
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background: currentColor;
+}
+
+.pillCompleted { background: var(--green-glow); color: var(--green); }
+.pillFailed { background: var(--rose-glow); color: var(--rose); }
+.pillRunning { background: rgba(59, 130, 246, 0.12); color: var(--blue); }
+.pillRunning .statusDot { animation: livePulse 1.5s ease-in-out infinite; }
+
+/* ─── Duration Bar ─── */
+.durationBar {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.bar {
+  width: 60px;
+  height: 4px;
+  background: var(--bg-base);
+  border-radius: 2px;
+  overflow: hidden;
+}
+
+.barFill {
+  height: 100%;
+  border-radius: 2px;
+  transition: width 0.3s;
+}
+
+.barFast { background: var(--green); }
+.barMedium { background: var(--amber); }
+.barSlow { background: var(--rose); }
+
+/* ─── Stat Card ─── */
+.statCard {
+  background: var(--bg-surface);
+  border: 1px solid var(--border-subtle);
+  border-radius: var(--radius-md);
+  padding: 16px 20px;
+  position: relative;
+  overflow: hidden;
+  transition: border-color 0.2s;
+}
+
+.statCard:hover { border-color: var(--border); }
+
+.statCard::before {
+  content: '';
+  position: absolute;
+  top: 0;
+  left: 0;
+  right: 0;
+  height: 2px;
+}
+
+.amber::before { background: linear-gradient(90deg, var(--amber), transparent); }
+.cyan::before { background: linear-gradient(90deg, var(--cyan), transparent); }
+.rose::before { background: linear-gradient(90deg, var(--rose), transparent); }
+.green::before { background: linear-gradient(90deg, var(--green), transparent); }
+.blue::before { background: linear-gradient(90deg, var(--blue), transparent); }
+
+.statLabel {
+  font-size: 11px;
+  font-weight: 600;
+  text-transform: uppercase;
+  letter-spacing: 0.8px;
+  color: var(--text-muted);
+  margin-bottom: 8px;
+}
+
+.statValue {
+  font-family: var(--font-mono);
+  font-size: 26px;
+  font-weight: 600;
+  letter-spacing: -1px;
+}
+
+.amber .statValue { color: var(--amber); }
+.cyan .statValue { color: var(--cyan); }
+.rose .statValue { color: var(--rose); }
+.green .statValue { color: var(--green); }
+.blue .statValue { color: var(--blue); }
+
+.statChange {
+  font-size: 11px;
+  font-family: var(--font-mono);
+  margin-top: 4px;
+}
+
+.up { color: var(--rose); }
+.down { color: var(--green); }
+.neutral { color: var(--text-muted); }
+
+/* ─── App Badge ─── */
+.appBadge {
+  display: inline-flex;
+  align-items: center;
+  gap: 5px;
+  padding: 2px 8px;
+  background: var(--bg-raised);
+  border: 1px solid var(--border);
+  border-radius: 4px;
+  font-size: 11px;
+  font-family: var(--font-mono);
+  color: var(--text-secondary);
+}
+
+.appDot {
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+}
+
+/* ─── Filter Chip ─── */
+.chip {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  padding: 5px 12px;
+  background: var(--bg-raised);
+  border: 1px solid var(--border);
+  border-radius: 99px;
+  font-size: 12px;
+  color: var(--text-secondary);
+  cursor: pointer;
+  transition: all 0.15s;
+  white-space: nowrap;
+  user-select: none;
+}
+
+.chip:hover { border-color: var(--text-muted); color: var(--text-primary); }
+
+.chipActive { background: var(--amber-glow); border-color: var(--amber-dim); color: var(--amber); }
+.chipActive.chipGreen { background: var(--green-glow); border-color: rgba(16, 185, 129, 0.3); color: var(--green); }
+.chipActive.chipRose { background: var(--rose-glow); border-color: rgba(244, 63, 94, 0.3); color: var(--rose); }
+.chipActive.chipBlue { background: rgba(59, 130, 246, 0.12); border-color: rgba(59, 130, 246, 0.3); color: var(--blue); }
+
+.chipDot {
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background: currentColor;
+  display: inline-block;
+}
+
+.chipCount {
+  font-family: var(--font-mono);
+  font-size: 10px;
+  opacity: 0.7;
+}
+
+/* ─── Pagination ─── */
+.pagination {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 4px;
+  margin-top: 20px;
+}
+
+.pageBtn {
+  width: 36px;
+  height: 36px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: var(--bg-surface);
+  border: 1px solid var(--border-subtle);
+  border-radius: var(--radius-sm);
+  color: var(--text-secondary);
+  font-family: var(--font-mono);
+  font-size: 13px;
+  cursor: pointer;
+  transition: all 0.15s;
+}
+
+.pageBtn:hover:not(:disabled) { border-color: var(--border); background: var(--bg-raised); }
+.pageBtnActive { background: var(--amber-glow); border-color: var(--amber-dim); color: var(--amber); }
+.pageBtnDisabled { opacity: 0.3; cursor: default; }
+
+.pageEllipsis {
+  color: var(--text-muted);
+  padding: 0 4px;
+  font-family: var(--font-mono);
+}