feat: F015 shortlist management

3-panel Shortlists page with left list, center detail, right decision brief panel. AddToShortlistDialog wired into result feed cards and match detail. Full DRAFT→REVIEW_READY→FINALIZED workflow, AI-generated decision brief draft, duplicate prevention, and compare-view integration.

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

src/hooks/useShortlists.ts

@@ -0,0 +1,66 @@
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query'
+import { shortlistService } from '../services/shortlistService'
+import type { CreateShortlistInput, UpdateShortlistInput, ShortlistItemInput } from '../domain/shortlist'
+
+export function useShortlists() {
+  return useQuery({
+    queryKey: ['shortlists'],
+    queryFn: () => shortlistService.getAll(),
+    select: (res) => res.data ?? [],
+  })
+}
+
+export function useShortlist(id: string) {
+  return useQuery({
+    queryKey: ['shortlist', id],
+    queryFn: () => shortlistService.getById(id),
+    enabled: !!id,
+    select: (res) => res.data ?? null,
+  })
+}
+
+export function useCreateShortlist() {
+  const queryClient = useQueryClient()
+  return useMutation({
+    mutationFn: (input: CreateShortlistInput) => shortlistService.create(input),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['shortlists'] })
+    },
+  })
+}
+
+export function useAddToShortlist() {
+  const queryClient = useQueryClient()
+  return useMutation({
+    mutationFn: ({ shortlistId, item }: { shortlistId: string; item: ShortlistItemInput }) =>
+      shortlistService.addItem(shortlistId, item),
+    onSuccess: (_data, { shortlistId }) => {
+      queryClient.invalidateQueries({ queryKey: ['shortlists'] })
+      queryClient.invalidateQueries({ queryKey: ['shortlist', shortlistId] })
+    },
+  })
+}
+
+export function useRemoveFromShortlist() {
+  const queryClient = useQueryClient()
+  return useMutation({
+    mutationFn: ({ shortlistId, resultId }: { shortlistId: string; resultId: string }) =>
+      shortlistService.removeItem(shortlistId, resultId),
+    onSuccess: (_data, { shortlistId }) => {
+      queryClient.invalidateQueries({ queryKey: ['shortlists'] })
+      queryClient.invalidateQueries({ queryKey: ['shortlist', shortlistId] })
+    },
+  })
+}
+
+export function useUpdateShortlist() {
+  const queryClient = useQueryClient()
+  return useMutation({
+    mutationFn: ({ id, data }: { id: string; data: UpdateShortlistInput }) =>
+      shortlistService.update(id, data),
+    onSuccess: (_data, { id }) => {
+      queryClient.invalidateQueries({ queryKey: ['shortlists'] })
+      queryClient.invalidateQueries({ queryKey: ['shortlist', id] })
+    },
+  })
+}