fix: resolve all 15 frontend ESLint errors for green CI

- Replace setState-in-effect with state-based tracking (AdminLayout, EditCategoryModal)
- Convert inline SortIcon component to getSortIcon function (TreeTableView)
- Remove unused catch parameters (CreateCategoryModal, EditCategoryModal)
- Replace `any` types with proper types (SessionFilters, AdminCategoriesPage, SessionHistoryPage)
- Fix unused destructuring variable (StepRatingModal)
- Fix constant binary expression in test (utils.test.ts)

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

frontend/src/components/admin/AdminLayout.tsx

@@ -5,12 +5,16 @@ import { AdminSidebar } from './AdminSidebar'
 
 export function AdminLayout() {
   const [mobileOpen, setMobileOpen] = useState(false)
+  const [prevPathname, setPrevPathname] = useState('')
   const location = useLocation()
 
-  // Close on route change
-  useEffect(() => {
-    setMobileOpen(false)
-  }, [location.pathname])
+  // Close on route change (state-based tracking, no effect needed)
+  if (prevPathname !== location.pathname) {
+    setPrevPathname(location.pathname)
+    if (mobileOpen) {
+      setMobileOpen(false)
+    }
+  }
 
   const handleKeyDown = useCallback((e: KeyboardEvent) => {
     if (e.key === 'Escape') setMobileOpen(false)

frontend/src/components/admin/CreateCategoryModal.tsx

@@ -43,7 +43,7 @@ export function CreateCategoryModal({
       // Reset form on success
       setName('')
       setDescription('')
-    } catch (err) {
+    } catch {
       setError('Failed to create category')
     }
   }

frontend/src/components/admin/EditCategoryModal.tsx

@@ -1,4 +1,4 @@
-import { useState, useEffect } from 'react'
+import { useState } from 'react'
 import { X } from 'lucide-react'
 import { cn } from '@/lib/utils'
 import type { StepCategoryListItem } from '@/types'
@@ -21,14 +21,17 @@ export function EditCategoryModal({
   const [name, setName] = useState('')
   const [description, setDescription] = useState('')
   const [error, setError] = useState('')
+  const [prevCategoryId, setPrevCategoryId] = useState<string | null>(null)
 
-  // Pre-populate form when category changes
-  useEffect(() => {
-    if (category) {
-      setName(category.name)
-      setDescription(category.description || '')
-    }
-  }, [category])
+  // Pre-populate form when category changes (state-based tracking)
+  if (category && category.id !== prevCategoryId) {
+    setPrevCategoryId(category.id)
+    setName(category.name)
+    setDescription(category.description || '')
+  }
+  if (!category && prevCategoryId !== null) {
+    setPrevCategoryId(null)
+  }
 
   if (!isOpen || !category) return null
 
@@ -51,7 +54,7 @@ export function EditCategoryModal({
         name: name.trim(),
         description: description.trim()
       })
-    } catch (err) {
+    } catch {
       setError('Failed to update category')
     }
   }

frontend/src/components/library/TreeTableView.tsx

@@ -54,7 +54,7 @@ export function TreeTableView({
     onSortChange?.(apiSort)
   }
 
-  const SortIcon = ({ column }: { column: SortColumn }) => {
+  const getSortIcon = (column: SortColumn) => {
     if (sortColumn !== column) return null
     return sortDirection === 'asc' ? (
       <ChevronUp className="h-3.5 w-3.5" />
@@ -79,7 +79,7 @@ export function TreeTableView({
             >
               <div className="flex items-center gap-1">
                 Name
-                <SortIcon column="name" />
+                {getSortIcon('name')}
               </div>
             </th>
             <th className="hidden md:table-cell px-4 py-3 text-left text-sm font-medium text-muted-foreground">
@@ -91,7 +91,7 @@ export function TreeTableView({
             >
               <div className="flex items-center gap-1">
                 Category
-                <SortIcon column="category" />
+                {getSortIcon('category')}
               </div>
             </th>
             <th className="hidden xl:table-cell px-4 py-3 text-left text-sm font-medium text-muted-foreground">
@@ -103,7 +103,7 @@ export function TreeTableView({
             >
               <div className="flex items-center justify-center gap-1">
                 Ver.
-                <SortIcon column="version" />
+                {getSortIcon('version')}
               </div>
             </th>
             <th
@@ -112,7 +112,7 @@ export function TreeTableView({
             >
               <div className="flex items-center justify-center gap-1">
                 Uses
-                <SortIcon column="usage" />
+                {getSortIcon('usage')}
               </div>
             </th>
             <th
@@ -121,7 +121,7 @@ export function TreeTableView({
             >
               <div className="flex items-center gap-1">
                 Updated
-                <SortIcon column="updated" />
+                {getSortIcon('updated')}
               </div>
             </th>
             <th className="px-4 py-3 text-right text-sm font-medium text-muted-foreground">

frontend/src/components/session/SessionFilters.tsx

@@ -33,11 +33,12 @@ export function SessionFilters({ filters, onChange, onClear, trees }: SessionFil
   const [showDatePicker, setShowDatePicker] = useState(false)
   const [localDateRange, setLocalDateRange] = useState<DateRange | undefined>(filters.dateRange)
 
+  const filtersDateRange = filters.dateRange
   useEffect(() => {
-    setLocalDateRange(filters.dateRange)
-  }, [filters.dateRange])
+    setLocalDateRange(filtersDateRange)
+  }, [filtersDateRange])
 
-  const handleFilterChange = (key: keyof SessionFilterState, value: any) => {
+  const handleFilterChange = (key: keyof SessionFilterState, value: SessionFilterState[keyof SessionFilterState]) => {
     onChange({ ...filters, [key]: value })
   }
 

frontend/src/components/session/StepRatingModal.tsx

@@ -62,7 +62,7 @@ export function StepRatingModal({
   const handleSubmit = async () => {
     // Filter out steps with no rating
     const ratingsToSubmit = new Map(
-      Array.from(ratings.entries()).filter(([_, data]) => data.rating > 0)
+      Array.from(ratings.entries()).filter(([, data]) => data.rating > 0)
     )
 
     if (ratingsToSubmit.size === 0) {

frontend/src/lib/utils.test.ts

@@ -7,7 +7,8 @@ describe('cn', () => {
   })
 
   it('handles conditional classes', () => {
-    expect(cn('base', false && 'hidden', 'visible')).toBe('base visible')
+    const isHidden = false
+    expect(cn('base', isHidden && 'hidden', 'visible')).toBe('base visible')
   })
 
   it('deduplicates tailwind classes', () => {

frontend/src/pages/AdminCategoriesPage.tsx

@@ -13,7 +13,7 @@ import { toast } from '@/lib/toast'
 
 export function AdminCategoriesPage() {
   const [categories, setCategories] = useState<StepCategoryListItem[]>([])
-  const [allSteps, setAllSteps] = useState<any[]>([])
+  const [allSteps, setAllSteps] = useState<{ category_id?: string }[]>([])
   const [isLoading, setIsLoading] = useState(true)
   const [showCreateModal, setShowCreateModal] = useState(false)
   const [showEditModal, setShowEditModal] = useState(false)

frontend/src/pages/SessionHistoryPage.tsx

@@ -75,7 +75,7 @@ export function SessionHistoryPage() {
   const loadSessions = async () => {
     setIsLoading(true)
     try {
-      const params: any = {}
+      const params: Record<string, string | boolean> = {}
 
       // Tab filter (all/active/completed)
       if (filter !== 'all') {