feat(Production): Complete production deployment infrastructure

- Add comprehensive health check system with multiple endpoints
- Add Prometheus metrics endpoint
- Add production logging configurations (5 strategies)
- Add complete deployment documentation suite:
  * QUICKSTART.md - 30-minute deployment guide
  * DEPLOYMENT_CHECKLIST.md - Printable verification checklist
  * DEPLOYMENT_WORKFLOW.md - Complete deployment lifecycle
  * PRODUCTION_DEPLOYMENT.md - Comprehensive technical reference
  * production-logging.md - Logging configuration guide
  * ANSIBLE_DEPLOYMENT.md - Infrastructure as Code automation
  * README.md - Navigation hub
  * DEPLOYMENT_SUMMARY.md - Executive summary
- Add deployment scripts and automation
- Add DEPLOYMENT_PLAN.md - Concrete plan for immediate deployment
- Update README with production-ready features

All production infrastructure is now complete and ready for deployment.

tests/javascript/modules/livecomponent/OptimisticUI.test.js

@@ -0,0 +1,320 @@
+/**
+ * Optimistic UI Tests
+ *
+ * Tests for version-based optimistic concurrency control and conflict resolution.
+ */
+
+import { OptimisticStateManager } from '../../../../resources/js/modules/livecomponent/OptimisticStateManager.js';
+
+describe('OptimisticStateManager', () => {
+    let manager;
+
+    beforeEach(() => {
+        manager = new OptimisticStateManager();
+    });
+
+    afterEach(() => {
+        manager.clear();
+    });
+
+    describe('applyOptimisticUpdate', () => {
+        it('creates snapshot before applying update', () => {
+            const componentId = 'test-component:1';
+            const currentState = {
+                data: { count: 5 },
+                version: 1
+            };
+
+            const optimisticState = manager.applyOptimisticUpdate(
+                componentId,
+                currentState,
+                (state) => ({
+                    ...state,
+                    data: { ...state.data, count: state.data.count + 1 }
+                }),
+                { action: 'increment' }
+            );
+
+            // Should create snapshot
+            const snapshot = manager.getSnapshot(componentId);
+            expect(snapshot).not.toBeNull();
+            expect(snapshot.version).toBe(1);
+            expect(snapshot.data.count).toBe(5);
+        });
+
+        it('increments version optimistically', () => {
+            const componentId = 'test-component:1';
+            const currentState = {
+                data: { count: 5 },
+                version: 1
+            };
+
+            const optimisticState = manager.applyOptimisticUpdate(
+                componentId,
+                currentState,
+                (state) => ({
+                    ...state,
+                    data: { ...state.data, count: state.data.count + 1 }
+                })
+            );
+
+            expect(optimisticState.version).toBe(2);
+            expect(optimisticState.data.count).toBe(6);
+        });
+
+        it('tracks pending operation', () => {
+            const componentId = 'test-component:1';
+            const currentState = {
+                data: { count: 5 },
+                version: 1
+            };
+
+            manager.applyOptimisticUpdate(
+                componentId,
+                currentState,
+                (state) => ({ ...state }),
+                { action: 'testAction', params: { value: 1 } }
+            );
+
+            const pendingOps = manager.getPendingOperations(componentId);
+            expect(pendingOps).toHaveLength(1);
+            expect(pendingOps[0].metadata.action).toBe('testAction');
+            expect(pendingOps[0].status).toBe('pending');
+        });
+
+        it('generates unique operation IDs', () => {
+            const componentId = 'test-component:1';
+            const currentState = {
+                data: {},
+                version: 1
+            };
+
+            manager.applyOptimisticUpdate(componentId, currentState, (s) => s);
+            const op1 = manager.getPendingOperations(componentId)[0];
+
+            manager.clear();
+
+            manager.applyOptimisticUpdate(componentId, currentState, (s) => s);
+            const op2 = manager.getPendingOperations(componentId)[0];
+
+            expect(op1.id).not.toBe(op2.id);
+        });
+    });
+
+    describe('confirmOperation', () => {
+        it('marks operation as confirmed', () => {
+            const componentId = 'test-component:1';
+            const currentState = { data: {}, version: 1 };
+
+            manager.applyOptimisticUpdate(componentId, currentState, (s) => s);
+            const operationId = manager.getPendingOperations(componentId)[0].id;
+
+            const serverState = { data: {}, version: 2 };
+            manager.confirmOperation(componentId, operationId, serverState);
+
+            // Operation should be removed from pending
+            expect(manager.getPendingOperations(componentId)).toHaveLength(0);
+        });
+
+        it('clears snapshot when no more pending operations', () => {
+            const componentId = 'test-component:1';
+            const currentState = { data: {}, version: 1 };
+
+            manager.applyOptimisticUpdate(componentId, currentState, (s) => s);
+            const operationId = manager.getPendingOperations(componentId)[0].id;
+
+            const serverState = { data: {}, version: 2 };
+            manager.confirmOperation(componentId, operationId, serverState);
+
+            // Snapshot should be cleared
+            expect(manager.getSnapshot(componentId)).toBeNull();
+        });
+
+        it('keeps snapshot when pending operations remain', () => {
+            const componentId = 'test-component:1';
+            const currentState = { data: {}, version: 1 };
+
+            // Create two pending operations
+            manager.applyOptimisticUpdate(componentId, currentState, (s) => s);
+            manager.applyOptimisticUpdate(componentId, { data: {}, version: 2 }, (s) => s);
+
+            const operations = manager.getPendingOperations(componentId);
+            const operationId = operations[0].id;
+
+            // Confirm first operation
+            manager.confirmOperation(componentId, operationId, { data: {}, version: 2 });
+
+            // Snapshot should still exist (second operation pending)
+            expect(manager.getSnapshot(componentId)).not.toBeNull();
+            expect(manager.getPendingOperations(componentId)).toHaveLength(1);
+        });
+    });
+
+    describe('handleConflict', () => {
+        it('marks operation as failed', () => {
+            const componentId = 'test-component:1';
+            const currentState = { data: {}, version: 1 };
+
+            manager.applyOptimisticUpdate(componentId, currentState, (s) => s);
+            const operationId = manager.getPendingOperations(componentId)[0].id;
+
+            const serverState = { data: {}, version: 3 }; // Conflict: expected 2, got 3
+            manager.handleConflict(componentId, operationId, serverState, {
+                expectedVersion: 2,
+                actualVersion: 3
+            });
+
+            // Operation should be removed
+            expect(manager.getPendingOperations(componentId)).toHaveLength(0);
+        });
+
+        it('returns server state and notification', () => {
+            const componentId = 'test-component:1';
+            const currentState = { data: { count: 5 }, version: 1 };
+
+            manager.applyOptimisticUpdate(
+                componentId,
+                currentState,
+                (s) => ({ ...s, data: { count: 6 } }),
+                { action: 'increment' }
+            );
+            const operationId = manager.getPendingOperations(componentId)[0].id;
+
+            const serverState = { data: { count: 10 }, version: 3 };
+            const result = manager.handleConflict(componentId, operationId, serverState);
+
+            expect(result.state).toEqual(serverState);
+            expect(result.notification).toBeDefined();
+            expect(result.notification.type).toBe('conflict');
+            expect(result.notification.canRetry).toBe(true);
+        });
+
+        it('clears all pending operations on conflict', () => {
+            const componentId = 'test-component:1';
+            const currentState = { data: {}, version: 1 };
+
+            // Create multiple pending operations
+            manager.applyOptimisticUpdate(componentId, currentState, (s) => s);
+            manager.applyOptimisticUpdate(componentId, { data: {}, version: 2 }, (s) => s);
+
+            const operationId = manager.getPendingOperations(componentId)[0].id;
+
+            manager.handleConflict(componentId, operationId, { data: {}, version: 5 });
+
+            // All operations should be cleared
+            expect(manager.getPendingOperations(componentId)).toHaveLength(0);
+        });
+
+        it('clears snapshot after conflict', () => {
+            const componentId = 'test-component:1';
+            const currentState = { data: {}, version: 1 };
+
+            manager.applyOptimisticUpdate(componentId, currentState, (s) => s);
+            const operationId = manager.getPendingOperations(componentId)[0].id;
+
+            manager.handleConflict(componentId, operationId, { data: {}, version: 3 });
+
+            expect(manager.getSnapshot(componentId)).toBeNull();
+        });
+
+        it('calls conflict handler if registered', () => {
+            const componentId = 'test-component:1';
+            const currentState = { data: {}, version: 1 };
+
+            const conflictHandler = jest.fn();
+            manager.registerConflictHandler(componentId, conflictHandler);
+
+            manager.applyOptimisticUpdate(componentId, currentState, (s) => s);
+            const operationId = manager.getPendingOperations(componentId)[0].id;
+
+            const serverState = { data: {}, version: 3 };
+            manager.handleConflict(componentId, operationId, serverState);
+
+            expect(conflictHandler).toHaveBeenCalled();
+            const callArgs = conflictHandler.mock.calls[0][0];
+            expect(callArgs.serverState).toEqual(serverState);
+        });
+    });
+
+    describe('retryOperation', () => {
+        it('executes retry callback with operation metadata', async () => {
+            const componentId = 'test-component:1';
+            const retryCallback = jest.fn().mockResolvedValue({ success: true });
+
+            const operation = {
+                id: 'op-1',
+                metadata: { action: 'testAction', params: { value: 1 } }
+            };
+
+            const result = await manager.retryOperation(componentId, operation, retryCallback);
+
+            expect(retryCallback).toHaveBeenCalledWith(operation.metadata);
+            expect(result.success).toBe(true);
+        });
+
+        it('propagates retry callback errors', async () => {
+            const componentId = 'test-component:1';
+            const error = new Error('Retry failed');
+            const retryCallback = jest.fn().mockRejectedValue(error);
+
+            const operation = {
+                id: 'op-1',
+                metadata: { action: 'testAction' }
+            };
+
+            await expect(
+                manager.retryOperation(componentId, operation, retryCallback)
+            ).rejects.toThrow('Retry failed');
+        });
+    });
+
+    describe('state management', () => {
+        it('tracks multiple components independently', () => {
+            const comp1 = 'component:1';
+            const comp2 = 'component:2';
+            const state = { data: {}, version: 1 };
+
+            manager.applyOptimisticUpdate(comp1, state, (s) => s);
+            manager.applyOptimisticUpdate(comp2, state, (s) => s);
+
+            expect(manager.getPendingOperations(comp1)).toHaveLength(1);
+            expect(manager.getPendingOperations(comp2)).toHaveLength(1);
+            expect(manager.getSnapshot(comp1)).not.toBeNull();
+            expect(manager.getSnapshot(comp2)).not.toBeNull();
+        });
+
+        it('clears all state correctly', () => {
+            const componentId = 'test-component:1';
+            const currentState = { data: {}, version: 1 };
+
+            manager.applyOptimisticUpdate(componentId, currentState, (s) => s);
+            manager.registerConflictHandler(componentId, () => {});
+
+            manager.clear();
+
+            expect(manager.getPendingOperations(componentId)).toHaveLength(0);
+            expect(manager.getSnapshot(componentId)).toBeNull();
+            expect(manager.getStats().total_components).toBe(0);
+        });
+    });
+
+    describe('getStats', () => {
+        it('returns accurate statistics', () => {
+            const comp1 = 'component:1';
+            const comp2 = 'component:2';
+            const state = { data: {}, version: 1 };
+
+            manager.applyOptimisticUpdate(comp1, state, (s) => s);
+            manager.applyOptimisticUpdate(comp1, { data: {}, version: 2 }, (s) => s);
+            manager.applyOptimisticUpdate(comp2, state, (s) => s);
+
+            const stats = manager.getStats();
+
+            expect(stats.total_components).toBe(2);
+            expect(stats.total_pending_operations).toBe(3);
+            expect(stats.total_snapshots).toBe(2);
+            expect(stats.components[comp1].pending).toBe(2);
+            expect(stats.components[comp2].pending).toBe(1);
+        });
+    });
+});