Refactor .gitignore to streamline ignored files and enhance clarity. Update CLAUDE.md to improve unit test instructions and add coverage reporting details. Revise README.md for better project overview and deployment instructions. Refactor ChannelEndpoints and StreamingEndpoints to utilize SegmentFiles for file resolution, improving code maintainability. Remove unused JunctionHandlers and update DependencyInjection for cleaner service registration. Enhance media processing services for better job handling and error management. Update frontend API types for consistency and clarity.

frontend/src/features/admin/groups/GroupDetail.tsx

@@ -3,8 +3,9 @@ import { Link } from '@tanstack/react-router'
 import { ChevronLeft, GripVertical, Search, Trash2 } from 'lucide-react'
 import { useEffect, useState } from 'react'
 import { useTranslation } from 'react-i18next'
-import { HttpError } from '@/shared/api/client'
+import { qk } from '@/shared/api/query-keys'
 import type { GroupCandidateDto, GroupFilter } from '@/shared/api/types'
+import { useApiError } from '@/shared/lib/use-api-error'
 import { Badge } from '@/shared/ui/badge'
 import { Button } from '@/shared/ui/button'
 import { Input } from '@/shared/ui/input'
@@ -36,7 +37,7 @@ export function GroupDetail({ groupId }: { groupId: string }) {
   const [dragged, setDragged] = useState<string | null>(null)
 
   const { data: group, isLoading } = useQuery({
-    queryKey: ['admin', 'groups', groupId],
+    queryKey: qk.groups.detail(groupId),
     queryFn: () => getGroup(groupId),
   })
 
@@ -46,10 +47,9 @@ export function GroupDetail({ groupId }: { groupId: string }) {
   }, [group, filter])
 
   const invalidate = () => {
-    void queryClient.invalidateQueries({ queryKey: ['admin', 'groups'] })
+    void queryClient.invalidateQueries({ queryKey: qk.groups.all })
   }
-  const onError = (error: unknown) =>
-    toast.error(error instanceof HttpError ? error.detail : t('common.error'))
+  const onError = useApiError()
 
   const saveMutation = useMutation({
     mutationFn: () =>

frontend/src/features/admin/groups/GroupFilterPanel.tsx

@@ -1,6 +1,7 @@
 import { useQuery } from '@tanstack/react-query'
 import { useTranslation } from 'react-i18next'
 import { listGenres } from '@/features/admin/genres/api'
+import { qk } from '@/shared/api/query-keys'
 import type { GroupElementKind, GroupFilter, ShowAudience, ShowKind } from '@/shared/api/types'
 import { SHOW_AUDIENCES } from '@/shared/api/types'
 import { Input } from '@/shared/ui/input'
@@ -18,7 +19,7 @@ export function GroupFilterPanel({
   onChange: (next: GroupFilter) => void
 }) {
   const { t } = useTranslation()
-  const { data: genres } = useQuery({ queryKey: ['admin', 'genres'], queryFn: listGenres })
+  const { data: genres } = useQuery({ queryKey: qk.genres.all, queryFn: listGenres })
 
   const patch = (part: Partial<GroupFilter>) => onChange({ ...filter, ...part })
 

frontend/src/features/admin/groups/GroupsPanel.tsx

@@ -2,12 +2,12 @@ import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query'
 import { Link } from '@tanstack/react-router'
 import { useState } from 'react'
 import { useTranslation } from 'react-i18next'
-import { HttpError } from '@/shared/api/client'
+import { qk } from '@/shared/api/query-keys'
+import { useApiError } from '@/shared/lib/use-api-error'
 import { Badge } from '@/shared/ui/badge'
 import { Button } from '@/shared/ui/button'
 import { Input } from '@/shared/ui/input'
 import { SortHeader, sortRows, useTableSort } from '@/shared/ui/sortable'
-import { toast } from '@/shared/ui/toast-store'
 import { createGroup, deleteGroup, listGroups } from './api'
 import { DurationLabel } from './DurationLabel'
 
@@ -17,11 +17,10 @@ export function GroupsPanel() {
   const [name, setName] = useState('')
   const { sort, toggle } = useTableSort('name', false)
 
-  const { data, isLoading } = useQuery({ queryKey: ['admin', 'groups'], queryFn: listGroups })
+  const { data, isLoading } = useQuery({ queryKey: qk.groups.all, queryFn: listGroups })
 
-  const invalidate = () => queryClient.invalidateQueries({ queryKey: ['admin', 'groups'] })
-  const onError = (error: unknown) =>
-    toast.error(error instanceof HttpError ? error.detail : t('common.error'))
+  const invalidate = () => queryClient.invalidateQueries({ queryKey: qk.groups.all })
+  const onError = useApiError()
 
   const createMutation = useMutation({
     mutationFn: () => createGroup({ name: name.trim() }),