Add multi-item Jira ticket creation from Ivanti Queue

Select multiple queue items and create a single consolidated Jira ticket
with aggregated summary and description. Adds multi-select mode with
checkboxes, floating action bar, consolidation modal, and junction table
to track which queue items contributed to each ticket.

- Migration: jira_ticket_queue_items junction table
- POST /api/jira-tickets/:id/queue-items endpoint
- GET /api/ivanti/todo-queue/ticket-links endpoint
- ConsolidationModal component with aggregation logic
- IvantiTodoQueuePage with selection mode and ticket link badges
- Pure utility functions for summary/description generation
- 34 tests passing (backend + frontend)

backend/__tests__/ivanti-todo-queue-ticket-links.test.js

@@ -0,0 +1,137 @@
+/**
+ * Unit tests for GET /api/ivanti/todo-queue/ticket-links endpoint
+ * Validates: Requirements 6.3, 6.4
+ */
+const http = require('http');
+const express = require('express');
+
+// Mock auth middleware
+jest.mock('../middleware/auth', () => ({
+    requireAuth: () => (req, _res, next) => {
+        req.user = { id: 7, username: 'testuser' };
+        next();
+    },
+    requireGroup: () => (_req, _res, next) => next(),
+}));
+
+// Mock audit log
+jest.mock('../helpers/auditLog', () => jest.fn());
+
+// Mock the db pool
+jest.mock('../db', () => ({
+    query: jest.fn(() => Promise.resolve({ rows: [] })),
+    connect: jest.fn(),
+}));
+
+const pool = require('../db');
+const createIvantiTodoQueueRouter = require('../routes/ivantiTodoQueue');
+
+/**
+ * Helper: send an HTTP request and return { statusCode, body }.
+ */
+function request(server, method, path) {
+    return new Promise((resolve, reject) => {
+        const addr = server.address();
+        const options = {
+            hostname: '127.0.0.1',
+            port: addr.port,
+            path,
+            method,
+            headers: { 'Content-Type': 'application/json' },
+        };
+
+        const req = http.request(options, (res) => {
+            const chunks = [];
+            res.on('data', (chunk) => chunks.push(chunk));
+            res.on('end', () => {
+                const raw = Buffer.concat(chunks).toString();
+                let body;
+                try { body = JSON.parse(raw); } catch { body = raw; }
+                resolve({ statusCode: res.statusCode, body });
+            });
+        });
+
+        req.on('error', reject);
+        req.end();
+    });
+}
+
+describe('GET /api/ivanti/todo-queue/ticket-links', () => {
+    let app;
+    let server;
+
+    beforeAll((done) => {
+        app = express();
+        app.use(express.json());
+        app.use('/api/ivanti/todo-queue', createIvantiTodoQueueRouter());
+        server = app.listen(0, '127.0.0.1', done);
+    });
+
+    afterAll((done) => {
+        server.close(done);
+    });
+
+    beforeEach(() => {
+        jest.clearAllMocks();
+    });
+
+    it('returns an empty links object when no associations exist', async () => {
+        pool.query.mockResolvedValueOnce({ rows: [] });
+
+        const res = await request(server, 'GET', '/api/ivanti/todo-queue/ticket-links');
+
+        expect(res.statusCode).toBe(200);
+        expect(res.body).toEqual({ links: {} });
+    });
+
+    it('returns a map of queue_item_id to ticket info', async () => {
+        pool.query.mockResolvedValueOnce({
+            rows: [
+                { queue_item_id: 12, ticket_key: 'VULN-789', jira_url: 'https://jira.example.com/browse/VULN-789' },
+                { queue_item_id: 15, ticket_key: 'VULN-789', jira_url: 'https://jira.example.com/browse/VULN-789' },
+                { queue_item_id: 22, ticket_key: 'VULN-801', jira_url: 'https://jira.example.com/browse/VULN-801' },
+            ],
+        });
+
+        const res = await request(server, 'GET', '/api/ivanti/todo-queue/ticket-links');
+
+        expect(res.statusCode).toBe(200);
+        expect(res.body).toEqual({
+            links: {
+                '12': { ticket_key: 'VULN-789', jira_url: 'https://jira.example.com/browse/VULN-789' },
+                '15': { ticket_key: 'VULN-789', jira_url: 'https://jira.example.com/browse/VULN-789' },
+                '22': { ticket_key: 'VULN-801', jira_url: 'https://jira.example.com/browse/VULN-801' },
+            },
+        });
+    });
+
+    it('filters by the authenticated user ID', async () => {
+        pool.query.mockResolvedValueOnce({ rows: [] });
+
+        await request(server, 'GET', '/api/ivanti/todo-queue/ticket-links');
+
+        const [sql, params] = pool.query.mock.calls[0];
+        expect(sql).toContain('q.user_id = $1');
+        expect(params).toEqual([7]);
+    });
+
+    it('joins jira_ticket_queue_items with jira_tickets and ivanti_todo_queue', async () => {
+        pool.query.mockResolvedValueOnce({ rows: [] });
+
+        await request(server, 'GET', '/api/ivanti/todo-queue/ticket-links');
+
+        const [sql] = pool.query.mock.calls[0];
+        expect(sql).toContain('jira_ticket_queue_items');
+        expect(sql).toContain('JOIN jira_tickets');
+        expect(sql).toContain('JOIN ivanti_todo_queue');
+    });
+
+    it('returns 500 on database error', async () => {
+        pool.query.mockRejectedValueOnce(new Error('DB connection failed'));
+
+        const res = await request(server, 'GET', '/api/ivanti/todo-queue/ticket-links');
+
+        expect(res.statusCode).toBe(500);
+        expect(res.body).toEqual({ error: 'Internal server error.' });
+    });
+});