feat(reporting): Action Coverage chart + Archer Exception linking

Replace FP# Workflow chart with a 3-segment Action Coverage donut:
  - FP Request  — finding has an Ivanti FP# workflow
  - Archer Exception — note matches EXC-\d+ pattern
  - Pending — no action taken yet

Clicking a segment filters the findings table to that category with a
colored badge in the action bar (click again or ×  to clear).

Home page: each Archer ticket now has a filter icon button that navigates
directly to the Reporting page pre-filtered to findings whose notes
reference that EXC number. The EXC badge appears in the table action bar
with a one-click clear.

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

frontend/src/App.js

@@ -179,6 +179,7 @@ export default function App() {
   const [currentPage, setCurrentPage] = useState('home');
   const [navOpen, setNavOpen] = useState(false);
   const [calendarFilter, setCalendarFilter] = useState(null);
+  const [reportingExcFilter, setReportingExcFilter] = useState(null);
   const [showAddCVE, setShowAddCVE] = useState(false);
   const [showUserManagement, setShowUserManagement] = useState(false);
   const [showAuditLog, setShowAuditLog] = useState(false);
@@ -963,8 +964,8 @@ export default function App() {
         onClose={() => setNavOpen(false)}
         currentPage={currentPage}
         onNavigate={(page) => {
-          // Clear calendar filter when navigating directly via the nav drawer
+          // Clear contextual filters when navigating directly via the nav drawer
-          if (page === 'reporting') setCalendarFilter(null);
+          if (page === 'reporting') { setCalendarFilter(null); setReportingExcFilter(null); }
           setCurrentPage(page);
         }}
       />
@@ -1041,7 +1042,7 @@ export default function App() {
         </div>
 
         {/* Page content */}
-        {currentPage === 'reporting'      && <ReportingPage filterDate={calendarFilter} />}
+        {currentPage === 'reporting'      && <ReportingPage filterDate={calendarFilter} filterEXC={reportingExcFilter} />}
         {currentPage === 'knowledge-base' && <KnowledgeBasePage />}
         {currentPage === 'exports'        && <ExportsPage />}
 
@@ -2332,16 +2333,23 @@ export default function App() {
                       >
                         {ticket.exc_number}
                       </a>
-                      {canWrite() && (
                       <div className="flex gap-1">
+                        <button
+                          onClick={() => { setReportingExcFilter(ticket.exc_number); setCurrentPage('reporting'); }}
+                          title="View findings referencing this ticket"
+                          className="text-gray-400 hover:text-sky-400 transition-colors"
+                        >
+                          <Filter className="w-3 h-3" />
+                        </button>
+                        {canWrite() && (<>
                           <button onClick={() => handleEditArcherTicket(ticket)} className="text-gray-400 hover:text-purple-400 transition-colors">
                             <Edit2 className="w-3 h-3" />
                           </button>
                           <button onClick={() => handleDeleteArcherTicket(ticket)} className="text-gray-400 hover:text-intel-danger transition-colors">
                             <Trash2 className="w-3 h-3" />
                           </button>
+                        </>)}
                       </div>
-                      )}
                     </div>
                     <div className="text-xs text-white font-mono mb-1">{ticket.cve_id}</div>
                     <div className="text-xs text-gray-400">{ticket.vendor}</div>

frontend/src/components/pages/ReportingPage.js

@@ -117,6 +117,17 @@ function getExportVal(finding, key) {
     }
 }
 
+// ---------------------------------------------------------------------------
+// Action coverage classification — used by chart and filter
+// ---------------------------------------------------------------------------
+const EXC_PATTERN = /EXC-\d+/i;
+
+function classifyFinding(finding) {
+    if (finding.workflow != null)           return 'fp';
+    if (EXC_PATTERN.test(finding.note || '')) return 'archer';
+    return 'pending';
+}
+
 // ---------------------------------------------------------------------------
 // Style helpers
 // ---------------------------------------------------------------------------
@@ -265,19 +276,15 @@ function StatusDonut({ open, closed, loading }) {
 }
 
 // ---------------------------------------------------------------------------
-// SVG Donut Chart — FP# workflow state distribution
+// SVG Donut Chart — Action Coverage (FP Request | Archer Exception | Pending)
 // ---------------------------------------------------------------------------
-const WF_STATE_DEFS = [
+const ACTION_DEFS = [
-    { key: 'expired',    label: 'Expired',    color: '#EF4444' },
+    { key: 'fp',      label: 'FP Request',      color: '#0EA5E9' },
-    { key: 'rejected',   label: 'Rejected',   color: '#F87171' },
+    { key: 'archer',  label: 'Archer Exception', color: '#F59E0B' },
-    { key: 'reworked',   label: 'Reworked',   color: '#F59E0B' },
+    { key: 'pending', label: 'Pending',          color: '#EF4444' },
-    { key: 'actionable', label: 'Actionable', color: '#FCD34D' },
-    { key: 'requested',  label: 'Requested',  color: '#0EA5E9' },
-    { key: 'approved',   label: 'Approved',   color: '#10B981' },
-    { key: 'none',       label: 'No FP#',     color: '#334155' },
 ];
 
-function WorkflowDonut({ findings }) {
+function ActionCoverageDonut({ findings, activeSegment, onSegmentClick }) {
     const SIZE = 180;
     const CX = SIZE / 2;
     const CY = SIZE / 2;
@@ -285,16 +292,12 @@ function WorkflowDonut({ findings }) {
     const INNER = 48;
 
     const counts = useMemo(() => {
-        const map = Object.fromEntries(WF_STATE_DEFS.map((d) => [d.key, 0]));
+        const map = { fp: 0, archer: 0, pending: 0 };
-        findings.forEach((f) => {
+        findings.forEach((f) => { map[classifyFinding(f)]++; });
-            const state = (f.workflow?.state || '').toLowerCase();
-            if (state && state in map) map[state]++;
-            else map.none++;
-        });
         return map;
     }, [findings]);
 
-    const total = Object.values(counts).reduce((a, b) => a + b, 0);
+    const total = findings.length;
 
     if (total === 0) {
         return (
@@ -305,29 +308,35 @@ function WorkflowDonut({ findings }) {
     }
 
     let cursor = 0;
-    const segments = WF_STATE_DEFS
+    const segments = ACTION_DEFS.map((def) => {
-        .map((def) => {
         const count = counts[def.key];
-            if (!count) return null;
         const start = cursor;
-            const end = cursor + (count / total) * 360;
+        const end = count > 0 ? cursor + (count / total) * 360 : cursor;
-            cursor = end;
+        if (count > 0) cursor = end;
         return { ...def, count, start, end };
-        })
+    });
-        .filter(Boolean);
+
+    const hasActive = !!activeSegment;
 
     return (
         <div style={{ display: 'flex', alignItems: 'center', gap: '2rem' }}>
             <svg width={SIZE} height={SIZE} style={{ flexShrink: 0 }}>
                 <circle cx={CX} cy={CY} r={OUTER + 1} fill="none" stroke="rgba(10,18,32,0.8)" strokeWidth="2" />
-                {segments.map((seg) => (
+                {segments.filter((s) => s.count > 0).map((seg) => {
+                    const isActive = activeSegment === seg.key;
+                    return (
                         <path
                             key={seg.key}
                             d={donutArcPath(CX, CY, OUTER, INNER, seg.start, seg.end)}
                             fill={seg.color}
-                        opacity={0.88}
+                            opacity={hasActive ? (isActive ? 1 : 0.25) : 0.88}
+                            stroke={isActive ? 'rgba(255,255,255,0.6)' : 'none'}
+                            strokeWidth={isActive ? 2 : 0}
+                            style={{ cursor: 'pointer', transition: 'opacity 0.2s' }}
+                            onClick={() => onSegmentClick(isActive ? null : seg.key)}
                         />
-                ))}
+                    );
+                })}
                 <text x={CX} y={CY - 10} textAnchor="middle" style={{ fontFamily: 'monospace', fontSize: '22px', fontWeight: '700', fill: '#E2E8F0' }}>
                     {total.toLocaleString()}
                 </text>
@@ -336,24 +345,40 @@ function WorkflowDonut({ findings }) {
                 </text>
             </svg>
 
-            {/* Legend */}
+            {/* Legend — always shows all 3 categories */}
-            <div style={{ display: 'flex', flexDirection: 'column', gap: '0.5rem' }}>
+            <div style={{ display: 'flex', flexDirection: 'column', gap: '0.6rem' }}>
-                {segments.map((seg) => (
+                {segments.map((seg) => {
-                    <div key={seg.key} style={{ display: 'flex', alignItems: 'center', gap: '0.5rem' }}>
+                    const isActive = activeSegment === seg.key;
-                        <div style={{ width: '8px', height: '8px', borderRadius: '2px', background: seg.color, flexShrink: 0 }} />
+                    const dimmed = hasActive && !isActive;
+                    return (
+                        <div
+                            key={seg.key}
+                            onClick={() => onSegmentClick(isActive ? null : seg.key)}
+                            style={{ display: 'flex', alignItems: 'center', gap: '0.5rem', cursor: 'pointer', opacity: dimmed ? 0.35 : 1, transition: 'opacity 0.2s' }}
+                        >
+                            <div style={{ width: '8px', height: '8px', borderRadius: '2px', background: seg.color, flexShrink: 0, outline: isActive ? `2px solid ${seg.color}` : 'none', outlineOffset: '1px' }} />
                             <div>
                                 <span style={{ fontFamily: 'monospace', fontSize: '0.68rem', fontWeight: '600', color: '#64748B', textTransform: 'uppercase', letterSpacing: '0.06em' }}>
                                     {seg.label}
                                 </span>
-                            <span style={{ fontFamily: 'monospace', fontSize: '0.75rem', fontWeight: '700', color: '#E2E8F0', marginLeft: '0.4rem' }}>
+                                <span style={{ fontFamily: 'monospace', fontSize: '0.8rem', fontWeight: '700', color: '#E2E8F0', marginLeft: '0.4rem' }}>
                                     {seg.count}
                                 </span>
                                 <span style={{ fontFamily: 'monospace', fontSize: '0.65rem', color: '#475569', marginLeft: '0.25rem' }}>
-                                ({((seg.count / total) * 100).toFixed(0)}%)
+                                    ({total > 0 ? ((seg.count / total) * 100).toFixed(0) : 0}%)
                                 </span>
                             </div>
                         </div>
-                ))}
+                    );
+                })}
+                {hasActive && (
+                    <button
+                        onClick={() => onSegmentClick(null)}
+                        style={{ marginTop: '0.25rem', background: 'none', border: 'none', fontFamily: 'monospace', fontSize: '0.65rem', color: '#475569', cursor: 'pointer', textAlign: 'left', padding: 0, textDecoration: 'underline' }}
+                    >
+                        clear filter
+                    </button>
+                )}
             </div>
         </div>
     );
@@ -835,7 +860,7 @@ function TableCell({ colKey, finding }) {
 // ---------------------------------------------------------------------------
 // Main ReportingPage
 // ---------------------------------------------------------------------------
-export default function ReportingPage({ filterDate }) {
+export default function ReportingPage({ filterDate, filterEXC }) {
     const [findings, setFindings]         = useState([]);
     const [total, setTotal]               = useState(null);
     const [syncedAt, setSyncedAt]         = useState(null);
@@ -852,6 +877,8 @@ export default function ReportingPage({ filterDate }) {
     );
     const [openFilter, setOpenFilter]     = useState(null);
     const filterBtnRefs                   = useRef({});
+    const [actionFilter, setActionFilter] = useState(null);
+    const [excFilter, setExcFilter]       = useState(filterEXC || null);
 
     const updateColumns = useCallback((newOrder) => {
         setColumnOrder(newOrder);
@@ -925,22 +952,38 @@ export default function ReportingPage({ filterDate }) {
         });
     }, []);
 
-    // Apply all active column filters to produce the visible row set
+    // Apply all active filters to produce the visible row set
     const filtered = useMemo(() => {
+        let result = findings;
+
+        // Column filters
         const active = Object.entries(columnFilters);
-        if (active.length === 0) return findings;
+        if (active.length > 0) {
-        return findings.filter((f) =>
+            result = result.filter((f) =>
                 active.every(([key, vals]) => {
                     if (!vals || vals.size === 0) return false;
                     const def = COLUMN_DEFS[key];
                     if (def?.multiValue) {
-                    // Row matches if ANY of its values is in the selected set
                         return (f[key] || []).some((v) => vals.has(String(v).trim()));
                     }
                     return vals.has(getFilterVal(f, key).trim());
                 })
             );
-    }, [findings, columnFilters]);
+        }
+
+        // Action coverage filter (chart segment click)
+        if (actionFilter) {
+            result = result.filter((f) => classifyFinding(f) === actionFilter);
+        }
+
+        // EXC filter (navigated from home page Archer ticket)
+        if (excFilter) {
+            const upper = excFilter.toUpperCase();
+            result = result.filter((f) => (f.note || '').toUpperCase().includes(upper));
+        }
+
+        return result;
+    }, [findings, columnFilters, actionFilter, excFilter]);
 
     // Visible columns in current order
     const visibleCols = columnOrder.filter((c) => c.visible && COLUMN_DEFS[c.key]);
@@ -966,7 +1009,7 @@ export default function ReportingPage({ filterDate }) {
         );
     };
 
-    const activeFilterCount = Object.keys(columnFilters).length;
+    const activeFilterCount = Object.keys(columnFilters).length + (actionFilter ? 1 : 0) + (excFilter ? 1 : 0);
 
     const [exportMenuOpen, setExportMenuOpen] = useState(false);
     const exportBtnRef = useRef(null);
@@ -1073,12 +1116,20 @@ export default function ReportingPage({ filterDate }) {
                     {/* Divider */}
                     <div style={{ width: '1px', background: 'rgba(255,255,255,0.06)', alignSelf: 'stretch', flexShrink: 0 }} />
 
-                    {/* FP# Workflow state donut */}
+                    {/* Action Coverage donut */}
                     <div style={{ flex: '0 0 auto' }}>
                         <div style={{ fontFamily: 'monospace', fontSize: '0.68rem', fontWeight: '600', color: '#64748B', textTransform: 'uppercase', letterSpacing: '0.1em', marginBottom: '0.75rem' }}>
-                            FP# Workflow Status
+                            Action Coverage
+                            {actionFilter && <span style={{ marginLeft: '0.5rem', color: ACTION_DEFS.find(d => d.key === actionFilter)?.color, fontSize: '0.6rem' }}>● filtered</span>}
                         </div>
-                        <WorkflowDonut findings={findings} />
+                        <ActionCoverageDonut
+                            findings={findings}
+                            activeSegment={actionFilter}
+                            onSegmentClick={(key) => {
+                                setExcFilter(null);
+                                setActionFilter(key);
+                            }}
+                        />
                     </div>
                 </div>
             </div>
@@ -1117,7 +1168,46 @@ export default function ReportingPage({ filterDate }) {
 
                     {/* Action buttons */}
                     <div style={{ display: 'flex', gap: '0.5rem', alignItems: 'center' }}>
-                        {activeFilterCount > 0 && (
+                        {/* EXC filter badge (from home page navigation) */}
+                        {excFilter && (
+                            <button
+                                onClick={() => setExcFilter(null)}
+                                style={{
+                                    display: 'flex', alignItems: 'center', gap: '0.375rem',
+                                    padding: '0.375rem 0.75rem',
+                                    background: 'rgba(245,158,11,0.08)',
+                                    border: '1px solid rgba(245,158,11,0.3)',
+                                    borderRadius: '0.375rem',
+                                    color: '#F59E0B', cursor: 'pointer',
+                                    fontFamily: 'monospace', fontSize: '0.75rem', fontWeight: '600',
+                                    letterSpacing: '0.05em'
+                                }}
+                            >
+                                <Filter style={{ width: '11px', height: '11px' }} />
+                                {excFilter} ×
+                            </button>
+                        )}
+                        {/* Action coverage filter badge (from chart click) */}
+                        {actionFilter && (
+                            <button
+                                onClick={() => setActionFilter(null)}
+                                style={{
+                                    display: 'flex', alignItems: 'center', gap: '0.375rem',
+                                    padding: '0.375rem 0.75rem',
+                                    background: actionFilter === 'fp' ? 'rgba(14,165,233,0.08)' : actionFilter === 'archer' ? 'rgba(245,158,11,0.08)' : 'rgba(239,68,68,0.08)',
+                                    border: `1px solid ${actionFilter === 'fp' ? 'rgba(14,165,233,0.3)' : actionFilter === 'archer' ? 'rgba(245,158,11,0.3)' : 'rgba(239,68,68,0.3)'}`,
+                                    borderRadius: '0.375rem',
+                                    color: actionFilter === 'fp' ? '#0EA5E9' : actionFilter === 'archer' ? '#F59E0B' : '#EF4444',
+                                    cursor: 'pointer',
+                                    fontFamily: 'monospace', fontSize: '0.75rem', fontWeight: '600',
+                                    letterSpacing: '0.05em'
+                                }}
+                            >
+                                <Filter style={{ width: '11px', height: '11px' }} />
+                                {ACTION_DEFS.find(d => d.key === actionFilter)?.label} ×
+                            </button>
+                        )}
+                        {Object.keys(columnFilters).length > 0 && (
                             <button
                                 onClick={() => setColumnFilters({})}
                                 style={{