refactor(frontend): consolidate overwrite and unsaved-changes into module folders

Group the overwrite trio (OverwriteConfirmDialog, OverwriteCtaButtons,
useOverwriteAction) into components/shared/overwrite/ — they cross-import
the OverwriteConflict type and 12 consumers always pull from the same
logical module. Same pattern for the unsaved-changes pair: move the
dialog from components/shared/ and the UI-agnostic guard hook from
hooks/ into components/shared/unsaved-changes/. Each folder ships an
index.ts so consumers reach the module through one import path.

frontend/src/components/shared/overwrite/index.ts

@@ -0,0 +1,5 @@
+export { OverwriteConfirmDialog } from './overwrite-confirm-dialog';
+export type { OverwriteConflict } from './overwrite-confirm-dialog';
+export { OverwriteCtaButtons } from './overwrite-cta-buttons';
+export { useOverwriteAction } from './use-overwrite-action';
+export type { OverwriteOutcome } from './use-overwrite-action';

frontend/src/components/shared/overwrite/use-overwrite-action.ts

@@ -1,6 +1,6 @@
 import { useCallback, useEffect, useRef, useState } from 'react';
 
-import type { OverwriteConflict } from '@/components/shared/overwrite-confirm-dialog';
+import type { OverwriteConflict } from './overwrite-confirm-dialog';
 
 /**
  * Discriminated outcome of a server action that supports an overwrite flag.

frontend/src/components/shared/unsaved-changes/index.ts

@@ -0,0 +1,4 @@
+export { UnsavedChangesDialog } from './unsaved-changes-dialog';
+export type { UnsavedChangesDialogProps } from './unsaved-changes-dialog';
+export { useUnsavedChangesGuard } from './use-unsaved-changes-guard';
+export type { UnsavedChangesGuard, UseUnsavedChangesGuardArgs } from './use-unsaved-changes-guard';

frontend/src/features/flows/files/flow-files-attach-resources-dialog.tsx

@@ -2,9 +2,7 @@ import { FolderInput, Search, X } from 'lucide-react';
 import { useCallback, useMemo, useState } from 'react';
 
 import { FileManager, type FileNode } from '@/components/shared/file-manager';
-import { OverwriteConfirmDialog } from '@/components/shared/overwrite-confirm-dialog';
-import { OverwriteCtaButtons } from '@/components/shared/overwrite-cta-buttons';
-import { useOverwriteAction } from '@/components/shared/use-overwrite-action';
+import { OverwriteConfirmDialog, OverwriteCtaButtons, useOverwriteAction } from '@/components/shared/overwrite';
 import { Button } from '@/components/ui/button';
 import {
     Dialog,

frontend/src/features/flows/files/flow-files-conflicts.ts

@@ -1,5 +1,5 @@
 import type { FileNode } from '@/components/shared/file-manager';
-import type { OverwriteConflict } from '@/components/shared/overwrite-confirm-dialog';
+import type { OverwriteConflict } from '@/components/shared/overwrite';
 
 import { CONTAINER_PATH_PREFIX, RESOURCES_PATH_PREFIX } from './flow-files-constants';
 

frontend/src/features/flows/files/flow-files-promote-dialog.tsx

@@ -4,11 +4,9 @@ import { useEffect, useMemo } from 'react';
 import { useForm } from 'react-hook-form';
 
 import type { FileNode } from '@/components/shared/file-manager';
-import type { OverwriteConflict } from '@/components/shared/overwrite-confirm-dialog';
+import type { OverwriteConflict } from '@/components/shared/overwrite';
 
-import { OverwriteConfirmDialog } from '@/components/shared/overwrite-confirm-dialog';
-import { OverwriteCtaButtons } from '@/components/shared/overwrite-cta-buttons';
-import { useOverwriteAction } from '@/components/shared/use-overwrite-action';
+import { OverwriteConfirmDialog, OverwriteCtaButtons, useOverwriteAction } from '@/components/shared/overwrite';
 import { Button } from '@/components/ui/button';
 import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle } from '@/components/ui/dialog';
 import { Form, FormControl, FormDescription, FormField, FormItem, FormLabel, FormMessage } from '@/components/ui/form';

frontend/src/features/flows/files/flow-files-pull-dialog.tsx

@@ -7,9 +7,7 @@ import {
     type FileManagerBulkAction,
     type FileNode,
 } from '@/components/shared/file-manager';
-import { OverwriteConfirmDialog } from '@/components/shared/overwrite-confirm-dialog';
-import { OverwriteCtaButtons } from '@/components/shared/overwrite-cta-buttons';
-import { useOverwriteAction } from '@/components/shared/use-overwrite-action';
+import { OverwriteConfirmDialog, OverwriteCtaButtons, useOverwriteAction } from '@/components/shared/overwrite';
 import {
     Autocomplete,
     AutocompleteContent,

frontend/src/features/flows/files/use-flow-files-attach-resources.ts

@@ -1,7 +1,7 @@
 import { useCallback, useState } from 'react';
 import { toast } from 'sonner';
 
-import type { OverwriteOutcome } from '@/components/shared/use-overwrite-action';
+import type { OverwriteOutcome } from '@/components/shared/overwrite';
 
 import { resourceIdsToWire } from '@/features/resources/resources-rest';
 import { api, getApiErrorMessage, getApiErrorStatusCode } from '@/lib/axios';

frontend/src/features/flows/files/use-flow-files-promote.ts

@@ -2,7 +2,7 @@ import { useCallback, useState } from 'react';
 import { toast } from 'sonner';
 import { z } from 'zod';
 
-import type { OverwriteOutcome } from '@/components/shared/use-overwrite-action';
+import type { OverwriteOutcome } from '@/components/shared/overwrite';
 import type { RestResourceList } from '@/features/resources/resources-rest';
 
 import { pluralizeItems } from '@/features/resources/resources-utils';

frontend/src/features/flows/files/use-flow-files-pull.ts

@@ -1,7 +1,7 @@
 import { useCallback, useState } from 'react';
 import { toast } from 'sonner';
 
-import type { OverwriteOutcome } from '@/components/shared/use-overwrite-action';
+import type { OverwriteOutcome } from '@/components/shared/overwrite';
 
 import { api, getApiErrorMessage, getApiErrorStatusCode } from '@/lib/axios';
 

frontend/src/features/knowledges/knowledge-form.tsx

@@ -12,12 +12,11 @@ import type {
 } from '@/graphql/types';
 
 import { HeaderButton } from '@/components/shared/header-button';
-import { UnsavedChangesDialog } from '@/components/shared/unsaved-changes-dialog';
+import { UnsavedChangesDialog, useUnsavedChangesGuard } from '@/components/shared/unsaved-changes';
 import { Form } from '@/components/ui/form';
 import { Spinner } from '@/components/ui/spinner';
 import { KnowledgeAnswerType, KnowledgeDocType, KnowledgeGuideType } from '@/graphql/types';
 import { useBreakpoint } from '@/hooks/use-breakpoint';
-import { useUnsavedChangesGuard } from '@/hooks/use-unsaved-changes-guard';
 import { Log } from '@/lib/log';
 
 import { KnowledgeFormLayoutDesktop, KnowledgeFormLayoutMobile } from './knowledge-form-layout';

frontend/src/features/resources/resources-copy-dialog.tsx

@@ -4,11 +4,9 @@ import { useEffect, useMemo } from 'react';
 import { useForm } from 'react-hook-form';
 
 import type { FileNode } from '@/components/shared/file-manager';
-import type { OverwriteConflict } from '@/components/shared/overwrite-confirm-dialog';
+import type { OverwriteConflict } from '@/components/shared/overwrite';
 
-import { OverwriteConfirmDialog } from '@/components/shared/overwrite-confirm-dialog';
-import { OverwriteCtaButtons } from '@/components/shared/overwrite-cta-buttons';
-import { useOverwriteAction } from '@/components/shared/use-overwrite-action';
+import { OverwriteConfirmDialog, OverwriteCtaButtons, useOverwriteAction } from '@/components/shared/overwrite';
 import { Button } from '@/components/ui/button';
 import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle } from '@/components/ui/dialog';
 import { Form, FormControl, FormDescription, FormField, FormItem, FormLabel, FormMessage } from '@/components/ui/form';

frontend/src/features/resources/resources-move-dialog.tsx

@@ -4,11 +4,9 @@ import { useEffect, useMemo } from 'react';
 import { useForm } from 'react-hook-form';
 
 import type { FileNode } from '@/components/shared/file-manager';
-import type { OverwriteConflict } from '@/components/shared/overwrite-confirm-dialog';
+import type { OverwriteConflict } from '@/components/shared/overwrite';
 
-import { OverwriteConfirmDialog } from '@/components/shared/overwrite-confirm-dialog';
-import { OverwriteCtaButtons } from '@/components/shared/overwrite-cta-buttons';
-import { useOverwriteAction } from '@/components/shared/use-overwrite-action';
+import { OverwriteConfirmDialog, OverwriteCtaButtons, useOverwriteAction } from '@/components/shared/overwrite';
 import { Button } from '@/components/ui/button';
 import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle } from '@/components/ui/dialog';
 import { Form, FormControl, FormDescription, FormField, FormItem, FormLabel, FormMessage } from '@/components/ui/form';

frontend/src/features/resources/use-resources-copy.ts

@@ -2,7 +2,7 @@ import { useCallback, useState } from 'react';
 import { toast } from 'sonner';
 import { z } from 'zod';
 
-import type { OverwriteOutcome } from '@/components/shared/use-overwrite-action';
+import type { OverwriteOutcome } from '@/components/shared/overwrite';
 
 import { api, getApiErrorMessage, getApiErrorStatusCode } from '@/lib/axios';
 

frontend/src/features/resources/use-resources-move.ts

@@ -2,7 +2,7 @@ import { useCallback, useState } from 'react';
 import { toast } from 'sonner';
 import { z } from 'zod';
 
-import type { OverwriteOutcome } from '@/components/shared/use-overwrite-action';
+import type { OverwriteOutcome } from '@/components/shared/overwrite';
 
 import { api, getApiErrorMessage, getApiErrorStatusCode } from '@/lib/axios';
 

frontend/src/pages/resources/resources.tsx

@@ -2,7 +2,7 @@ import { ChevronDown, Copy, FileSymlink, Folder, FolderPlus, FolderUp, Loader2,
 import { useCallback, useMemo, useState } from 'react';
 import { toast } from 'sonner';
 
-import type { OverwriteConflict } from '@/components/shared/overwrite-confirm-dialog';
+import type { OverwriteConflict } from '@/components/shared/overwrite';
 
 import ConfirmationDialog from '@/components/shared/confirmation-dialog';
 import {
@@ -24,8 +24,7 @@ import {
     formatModifiedRelative,
 } from '@/components/shared/file-manager';
 import { HeaderButton } from '@/components/shared/header-button';
-import { OverwriteConfirmDialog } from '@/components/shared/overwrite-confirm-dialog';
-import { useOverwriteAction } from '@/components/shared/use-overwrite-action';
+import { OverwriteConfirmDialog, useOverwriteAction } from '@/components/shared/overwrite';
 import { Breadcrumb, BreadcrumbItem, BreadcrumbList, BreadcrumbPage } from '@/components/ui/breadcrumb';
 import { Button } from '@/components/ui/button';
 import {