diff --git a/backend/requirements-dev.txt b/backend/requirements-dev.txt
index d974d0bd..bce6e475 100644
--- a/backend/requirements-dev.txt
+++ b/backend/requirements-dev.txt
@@ -4,7 +4,7 @@
 # Testing
 pytest==7.4.3
 pytest-asyncio==0.23.0
-httpx==0.26.0
+httpx>=0.27.0
 pytest-cov==4.1.0
 
 # Code quality
diff --git a/frontend/src/components/admin/EmptyState.tsx b/frontend/src/components/admin/EmptyState.tsx
index 4e58f7a8..1fd1c8a8 100644
--- a/frontend/src/components/admin/EmptyState.tsx
+++ b/frontend/src/components/admin/EmptyState.tsx
@@ -1,2 +1 @@
 export { EmptyState } from '@/components/common/EmptyState'
-export { default } from '@/components/common/EmptyState'
diff --git a/frontend/src/components/analytics/FlowAnalyticsPanel.tsx b/frontend/src/components/analytics/FlowAnalyticsPanel.tsx
index 7c5823ea..64afac14 100644
--- a/frontend/src/components/analytics/FlowAnalyticsPanel.tsx
+++ b/frontend/src/components/analytics/FlowAnalyticsPanel.tsx
@@ -37,7 +37,9 @@ export function FlowAnalyticsPanel({ treeId }: FlowAnalyticsPanelProps) {
   const [error, setError] = useState(false)
 
   useEffect(() => {
+    // eslint-disable-next-line react-hooks/set-state-in-effect
     setLoading(true)
+    // eslint-disable-next-line react-hooks/set-state-in-effect
     setError(false)
     analyticsApi
       .getFlowAnalytics(treeId, period)
diff --git a/frontend/src/components/common/Modal.tsx b/frontend/src/components/common/Modal.tsx
index f798e4bb..58262b47 100644
--- a/frontend/src/components/common/Modal.tsx
+++ b/frontend/src/components/common/Modal.tsx
@@ -29,7 +29,9 @@ export function Modal({ isOpen, onClose, title, children, footer, size = 'md', a
     setIsFullScreen(next)
     try {
       localStorage.setItem('rf-editor-fullscreen', String(next))
-    } catch {}
+    } catch {
+      // localStorage unavailable — ignore
+    }
   }
 
   // Close on Escape key
diff --git a/frontend/src/components/layout/QuickLaunch.tsx b/frontend/src/components/layout/QuickLaunch.tsx
index 76da29fe..11337487 100644
--- a/frontend/src/components/layout/QuickLaunch.tsx
+++ b/frontend/src/components/layout/QuickLaunch.tsx
@@ -40,6 +40,7 @@ export function QuickLaunch({ open, onClose }: QuickLaunchProps) {
 
   useEffect(() => {
     if (open) {
+      // eslint-disable-next-line react-hooks/set-state-in-effect
       setSelectedIndex(0)
       treesApi.list({ sort_by: 'updated_at' })
         .then(trees => setRecentTrees(trees.slice(0, 4)))
diff --git a/frontend/src/components/session/CSATModal.tsx b/frontend/src/components/session/CSATModal.tsx
index b99bcc74..6611bb6a 100644
--- a/frontend/src/components/session/CSATModal.tsx
+++ b/frontend/src/components/session/CSATModal.tsx
@@ -3,6 +3,7 @@ import { Star } from 'lucide-react'
 import { Modal } from '@/components/common/Modal'
 import { analyticsApi } from '@/api'
 import { cn } from '@/lib/utils'
+import { markSessionRated } from './csatUtils'
 
 interface CSATModalProps {
   isOpen: boolean
@@ -10,26 +11,6 @@ interface CSATModalProps {
   sessionId: string
 }
 
-const RATED_SESSIONS_KEY = 'rf-rated-sessions'
-
-function getRatedSessions(): string[] {
-  try {
-    return JSON.parse(localStorage.getItem(RATED_SESSIONS_KEY) || '[]')
-  } catch {
-    return []
-  }
-}
-
-function markSessionRated(sessionId: string) {
-  const rated = getRatedSessions()
-  rated.push(sessionId)
-  localStorage.setItem(RATED_SESSIONS_KEY, JSON.stringify(rated.slice(-100)))
-}
-
-export function hasBeenRated(sessionId: string): boolean {
-  return getRatedSessions().includes(sessionId)
-}
-
 export function CSATModal({ isOpen, onClose, sessionId }: CSATModalProps) {
   const [rating, setRating] = useState(0)
   const [hoveredRating, setHoveredRating] = useState(0)
diff --git a/frontend/src/components/session/csatUtils.ts b/frontend/src/components/session/csatUtils.ts
new file mode 100644
index 00000000..8ffceea5
--- /dev/null
+++ b/frontend/src/components/session/csatUtils.ts
@@ -0,0 +1,19 @@
+const RATED_SESSIONS_KEY = 'rf-rated-sessions'
+
+export function getRatedSessions(): string[] {
+  try {
+    return JSON.parse(localStorage.getItem(RATED_SESSIONS_KEY) || '[]')
+  } catch {
+    return []
+  }
+}
+
+export function markSessionRated(sessionId: string) {
+  const rated = getRatedSessions()
+  rated.push(sessionId)
+  localStorage.setItem(RATED_SESSIONS_KEY, JSON.stringify(rated.slice(-100)))
+}
+
+export function hasBeenRated(sessionId: string): boolean {
+  return getRatedSessions().includes(sessionId)
+}
diff --git a/frontend/src/components/tree-editor/NodeEditorPanel.tsx b/frontend/src/components/tree-editor/NodeEditorPanel.tsx
index a6d76349..c1362b06 100644
--- a/frontend/src/components/tree-editor/NodeEditorPanel.tsx
+++ b/frontend/src/components/tree-editor/NodeEditorPanel.tsx
@@ -21,6 +21,7 @@ const TYPE_CONFIG: Record<Exclude<NodeType, 'answer'>, { icon: typeof HelpCircle
 }
 
 function cloneWithoutChildren(node: TreeStructure): TreeStructure {
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
   const { children: _children, ...rest } = node
   return structuredClone(rest) as TreeStructure
 }
@@ -44,8 +45,11 @@ export function NodeEditorPanel({ nodeId, onClose, onSelectType }: NodeEditorPan
   // (e.g., answer stub → decision/action/solution via type picker)
   useEffect(() => {
     if (node) {
+      // eslint-disable-next-line react-hooks/set-state-in-effect
       setDraft(cloneWithoutChildren(node))
+      // eslint-disable-next-line react-hooks/set-state-in-effect
       setIsDirty(false)
+      // eslint-disable-next-line react-hooks/set-state-in-effect
       setShowDeleteConfirm(false)
     }
   }, [nodeId, node?.type]) // eslint-disable-line react-hooks/exhaustive-deps
@@ -57,6 +61,7 @@ export function NodeEditorPanel({ nodeId, onClose, onSelectType }: NodeEditorPan
 
   const handleSave = useCallback(() => {
     if (!draft || !node) return
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
     const { children: _children, ...draftWithoutChildren } = draft
     updateNode(nodeId, draftWithoutChildren)
 
diff --git a/frontend/src/components/tree-editor/useTreeLayout.ts b/frontend/src/components/tree-editor/useTreeLayout.ts
index d0c146be..c600c70e 100644
--- a/frontend/src/components/tree-editor/useTreeLayout.ts
+++ b/frontend/src/components/tree-editor/useTreeLayout.ts
@@ -60,6 +60,7 @@ export function useTreeLayout(): UseTreeLayoutResult {
 
     if (!treeStructure) return { rawNodes: nodes, rawEdges: edges }
 
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
     function walk(node: TreeStructure, _parentId?: string | null) {
       const isCollapsed = collapsedNodeIds.has(node.id)
       const hasChildren = (node.children?.length ?? 0) > 0
diff --git a/frontend/src/hooks/useCachedQuota.ts b/frontend/src/hooks/useCachedQuota.ts
index 32f3175f..28a41f00 100644
--- a/frontend/src/hooks/useCachedQuota.ts
+++ b/frontend/src/hooks/useCachedQuota.ts
@@ -16,7 +16,9 @@ export function useCachedQuota() {
 
   useEffect(() => {
     if (cachedResult && Date.now() - cachedResult.timestamp < CACHE_TTL_MS) {
+      // eslint-disable-next-line react-hooks/set-state-in-effect
       setAiEnabled(cachedResult.aiEnabled)
+      // eslint-disable-next-line react-hooks/set-state-in-effect
       setIsLoading(false)
       return
     }
diff --git a/frontend/src/hooks/usePaginationParams.ts b/frontend/src/hooks/usePaginationParams.ts
index 3a643bac..f4c02a67 100644
--- a/frontend/src/hooks/usePaginationParams.ts
+++ b/frontend/src/hooks/usePaginationParams.ts
@@ -1,5 +1,5 @@
 import { useSearchParams } from 'react-router-dom'
-import { useCallback, useMemo, useRef } from 'react'
+import { useCallback, useMemo } from 'react'
 
 type PageSize = number | 'all'
 
@@ -13,10 +13,6 @@ const DEFAULT_ALLOWED: PageSize[] = [10, 25, 50, 'all']
 export function usePaginationParams(options: UsePaginationParamsOptions = {}) {
   const { defaultPageSize = 10, allowedPageSizes = DEFAULT_ALLOWED } = options
 
-  // Stabilize the array reference to avoid re-render loops
-  const allowedRef = useRef(allowedPageSizes)
-  allowedRef.current = allowedPageSizes
-
   const [searchParams, setSearchParams] = useSearchParams()
 
   const page = useMemo(() => {
@@ -27,11 +23,11 @@ export function usePaginationParams(options: UsePaginationParamsOptions = {}) {
 
   const pageSize = useMemo((): PageSize => {
     const raw = searchParams.get('size')
-    if (raw === 'all' && allowedRef.current.includes('all')) return 'all'
+    if (raw === 'all' && allowedPageSizes.includes('all')) return 'all'
     const n = raw ? parseInt(raw, 10) : defaultPageSize
-    if (Number.isFinite(n) && allowedRef.current.includes(n)) return n
+    if (Number.isFinite(n) && allowedPageSizes.includes(n)) return n
     return defaultPageSize
-  }, [searchParams, defaultPageSize])
+  }, [searchParams, defaultPageSize, allowedPageSizes])
 
   const setPage = useCallback(
     (newPage: number) => {
diff --git a/frontend/src/pages/MyAnalyticsPage.tsx b/frontend/src/pages/MyAnalyticsPage.tsx
index a7b7d88a..e5aa3564 100644
--- a/frontend/src/pages/MyAnalyticsPage.tsx
+++ b/frontend/src/pages/MyAnalyticsPage.tsx
@@ -35,6 +35,7 @@ export default function MyAnalyticsPage() {
   const [loading, setLoading] = useState(true)
 
   useEffect(() => {
+    // eslint-disable-next-line react-hooks/set-state-in-effect
     setLoading(true)
     analyticsApi
       .getPersonalAnalytics(period)
diff --git a/frontend/src/pages/ProceduralNavigationPage.tsx b/frontend/src/pages/ProceduralNavigationPage.tsx
index 4d313ace..8f416d2a 100644
--- a/frontend/src/pages/ProceduralNavigationPage.tsx
+++ b/frontend/src/pages/ProceduralNavigationPage.tsx
@@ -14,7 +14,8 @@ import { Spinner } from '@/components/common/Spinner'
 import { cn } from '@/lib/utils'
 import { toast } from '@/lib/toast'
 import { StepFeedback } from '@/components/session/StepFeedback'
-import { CSATModal, hasBeenRated } from '@/components/session/CSATModal'
+import { CSATModal } from '@/components/session/CSATModal'
+import { hasBeenRated } from '@/components/session/csatUtils'
 
 interface StepState {
   notes: string
diff --git a/frontend/src/pages/TeamAnalyticsPage.tsx b/frontend/src/pages/TeamAnalyticsPage.tsx
index f2a27342..950533aa 100644
--- a/frontend/src/pages/TeamAnalyticsPage.tsx
+++ b/frontend/src/pages/TeamAnalyticsPage.tsx
@@ -37,6 +37,7 @@ export default function TeamAnalyticsPage() {
   useEffect(() => {
     if (!isAccountOwner && !isSuperAdmin) return
 
+    // eslint-disable-next-line react-hooks/set-state-in-effect
     setLoading(true)
     analyticsApi
       .getTeamAnalytics(period)
diff --git a/frontend/src/pages/TreeNavigationPage.tsx b/frontend/src/pages/TreeNavigationPage.tsx
index 00f31bf8..848ae3af 100644
--- a/frontend/src/pages/TreeNavigationPage.tsx
+++ b/frontend/src/pages/TreeNavigationPage.tsx
@@ -15,7 +15,8 @@ import { Spinner } from '@/components/common/Spinner'
 import { toast } from '@/lib/toast'
 import { Modal } from '@/components/common/Modal'
 import { ShareSessionModal } from '@/components/session/ShareSessionModal'
-import { CSATModal, hasBeenRated } from '@/components/session/CSATModal'
+import { CSATModal } from '@/components/session/CSATModal'
+import { hasBeenRated } from '@/components/session/csatUtils'
 import { StepFeedback } from '@/components/session/StepFeedback'
 import { buildSessionShareUrl, getLatestActiveShareForSession } from '@/lib/sessionShare'