Fix TypeScript errors in CompareView and ScanDetails

- Prefix unused `getProgress` prop with `_` to satisfy noUnusedLocals
- Remove unused `dim` style declaration
- Remove unused `ScanHistoryItem` import
- Remove unused `current` variable in treemap ancestor loop
- Widen `parent` type to include `undefined` for optional chaining

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: ryan-williams

ui/src/components/CompareView.tsx

@@ -439,7 +439,7 @@ function CompareRowComponent({
   routeType,
   onScan,
   isScanning,
-  getProgress,
+  getProgress: _getProgress,
   scan1,
   scan2,
 }: {
@@ -473,7 +473,6 @@ function CompareRowComponent({
   const compareUrl = params.toString() ? `${basePath}?${params}` : basePath
 
   const td: React.CSSProperties = { padding: '8px 6px', textAlign: 'right', fontFamily: 'monospace', fontSize: '0.85em', whiteSpace: 'nowrap' }
-  const dim: React.CSSProperties = { color: '#8b949e' }
 
   // Size values
   const sizeBefore = row.status === 'added' ? '-' : formatSize(row.size_old ?? row.size)

ui/src/components/ScanDetails.tsx

@@ -5,7 +5,7 @@ import { FaChevronDown, FaChevronRight, FaExclamationTriangle, FaExchangeAlt, Fa
 import { LazyPlot as Plot } from './LazyPlot'
 import { useQuery } from '@tanstack/react-query'
 import { fetchScanDetails, fetchScanHistory, startScan, fetchScanStatus, deletePath } from '../api'
-import type { Row, ScanJob, ScanProgress, ScanHistoryItem } from '../api'
+import type { Row, ScanJob, ScanProgress } from '../api'
 import { useScanProgress } from '../hooks/useScanProgress'
 import { useRecentPaths } from '../hooks/useRecentPaths'
 
@@ -435,12 +435,10 @@ function Treemap({ root, rows }: { root: Row; rows: Row[] }) {
 
       // Find top-level ancestor
       let topLevel = row.parent
-      let current = row
       while (topLevel && topLevel !== '.') {
         const parentRow = rows.find(r => r.path === topLevel)
         if (!parentRow || parentRow.parent === '.') break
         topLevel = parentRow.parent
-        current = parentRow
       }
 
       // topLevel is now the direct child of root, or we use the immediate parent
@@ -465,7 +463,7 @@ function Treemap({ root, rows }: { root: Row; rows: Row[] }) {
 
       // Ensure parent chain is included
       for (const row of [...topRows]) {
-        let parent = row.parent
+        let parent: string | null | undefined = row.parent
         while (parent && parent !== '.' && !included.has(parent)) {
           const parentRow = subtreeRows.find(r => r.path === parent)
           if (parentRow) {