Remove unused icon imports to fix ESLint warning count

frontend/src/components/pages/CCPMetricsPage.js

@@ -1,5 +1,5 @@
 import React, { useState, useEffect, useCallback } from 'react';
-import { Upload, Building2, ChevronLeft, Loader, AlertCircle, TrendingUp, Target, ShieldAlert, BarChart3 } from 'lucide-react';
+import { Upload, Building2, ChevronLeft, Loader, AlertCircle, BarChart3 } from 'lucide-react';
 import { useAuth } from '../../contexts/AuthContext';
 import { PieChart, Pie, Cell, ComposedChart, Bar, Line, XAxis, YAxis, CartesianGrid, Tooltip, Legend, ReferenceLine, ResponsiveContainer } from 'recharts';
 import MultiVerticalUploadModal from './MultiVerticalUploadModal';
@@ -210,7 +210,7 @@ function VerticalDetailView({ vertical, onBack, onSelectMetric }) {
     const [categories, setCategories] = useState(null);
     const [burndown, setBurndown] = useState(null);
     const [loading, setLoading] = useState(true);
-    // ⚠️ CONVENTION: No error state — catch silently swallows errors without displaying them to the user
+    // ⚠️ CONVENTION: Missing error state — .catch() silently swallows errors without displaying them to the user. Add an error state and render an error message (see main CCPMetricsPage pattern).
 
     useEffect(() => {
         setLoading(true);
@@ -356,7 +356,7 @@ function VerticalDetailView({ vertical, onBack, onSelectMetric }) {
 function MetricDeviceList({ vertical, metricId, onBack }) {
     const [devices, setDevices] = useState(null);
     const [loading, setLoading] = useState(true);
-    // ⚠️ CONVENTION: No error state — catch silently swallows errors without displaying them to the user
+    // ⚠️ CONVENTION: Missing error state — .catch() silently swallows errors without displaying them to the user. Add an error state and render an error message (see main CCPMetricsPage pattern).
 
     useEffect(() => {
         setLoading(true);

frontend/src/components/pages/MultiVerticalUploadModal.js

@@ -1,5 +1,5 @@
 import React, { useState, useRef } from 'react';
-import { X, Upload, FileSpreadsheet, Loader, CheckCircle, AlertCircle, Trash2, ChevronDown, ChevronRight } from 'lucide-react';
+import { X, Upload, FileSpreadsheet, Loader, CheckCircle, AlertCircle, Trash2 } from 'lucide-react';
 
 const API_BASE = process.env.REACT_APP_API_BASE || 'http://localhost:3001/api';
 const PURPLE = '#A78BFA';