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/api/schema.d.ts

@@ -0,0 +1,186 @@
+/**
+ * Hand-written OpenAPI types matching the cameleer3 server REST API.
+ * Will be replaced by openapi-typescript codegen once backend is running.
+ */
+
+export interface paths {
+  '/auth/login': {
+    post: {
+      requestBody: {
+        content: {
+          'application/json': {
+            username: string;
+            password: string;
+          };
+        };
+      };
+      responses: {
+        200: {
+          content: {
+            'application/json': {
+              accessToken: string;
+              refreshToken: string;
+            };
+          };
+        };
+        401: { content: { 'application/json': { message: string } } };
+      };
+    };
+  };
+  '/auth/refresh': {
+    post: {
+      requestBody: {
+        content: {
+          'application/json': {
+            refreshToken: string;
+          };
+        };
+      };
+      responses: {
+        200: {
+          content: {
+            'application/json': {
+              accessToken: string;
+              refreshToken: string;
+            };
+          };
+        };
+        401: { content: { 'application/json': { message: string } } };
+      };
+    };
+  };
+  '/search/executions': {
+    post: {
+      requestBody: {
+        content: {
+          'application/json': SearchRequest;
+        };
+      };
+      responses: {
+        200: {
+          content: {
+            'application/json': SearchResponse;
+          };
+        };
+      };
+    };
+  };
+  '/executions/{executionId}': {
+    get: {
+      parameters: {
+        path: { executionId: string };
+      };
+      responses: {
+        200: {
+          content: {
+            'application/json': ExecutionDetail;
+          };
+        };
+        404: { content: { 'application/json': { message: string } } };
+      };
+    };
+  };
+  '/executions/{executionId}/processors/{index}/snapshot': {
+    get: {
+      parameters: {
+        path: { executionId: string; index: number };
+      };
+      responses: {
+        200: {
+          content: {
+            'application/json': ExchangeSnapshot;
+          };
+        };
+        404: { content: { 'application/json': { message: string } } };
+      };
+    };
+  };
+  '/agents': {
+    get: {
+      parameters: {
+        query?: { status?: string };
+      };
+      responses: {
+        200: {
+          content: {
+            'application/json': AgentInstance[];
+          };
+        };
+      };
+    };
+  };
+}
+
+export interface SearchRequest {
+  status?: string | null;
+  timeFrom?: string | null;
+  timeTo?: string | null;
+  durationMin?: number | null;
+  durationMax?: number | null;
+  correlationId?: string | null;
+  text?: string | null;
+  textInBody?: string | null;
+  textInHeaders?: string | null;
+  textInErrors?: string | null;
+  offset?: number;
+  limit?: number;
+}
+
+export interface SearchResponse {
+  results: ExecutionSummary[];
+  total: number;
+  offset: number;
+  limit: number;
+}
+
+export interface ExecutionSummary {
+  executionId: string;
+  routeId: string;
+  agentId: string;
+  status: 'COMPLETED' | 'FAILED' | 'RUNNING';
+  startTime: string;
+  duration: number;
+  processorCount: number;
+  correlationId: string | null;
+  errorMessage: string | null;
+}
+
+export interface ExecutionDetail {
+  executionId: string;
+  routeId: string;
+  agentId: string;
+  status: 'COMPLETED' | 'FAILED' | 'RUNNING';
+  startTime: string;
+  duration: number;
+  correlationId: string | null;
+  errorMessage: string | null;
+  processors: ProcessorNode[];
+}
+
+export interface ProcessorNode {
+  index: number;
+  processorId: string;
+  processorType: string;
+  uri: string | null;
+  status: 'COMPLETED' | 'FAILED' | 'RUNNING';
+  duration: number;
+  errorMessage: string | null;
+  children: ProcessorNode[];
+}
+
+export interface ExchangeSnapshot {
+  exchangeId: string;
+  correlationId: string | null;
+  bodyType: string | null;
+  body: string | null;
+  headers: Record<string, string> | null;
+  properties: Record<string, string> | null;
+}
+
+export interface AgentInstance {
+  agentId: string;
+  group: string;
+  state: 'LIVE' | 'STALE' | 'DEAD';
+  lastHeartbeat: string;
+  registeredAt: string;
+}