diff --git a/web/src/pages/admin/pricing-library/PricingLibraryPage.tsx b/web/src/pages/admin/pricing-library/PricingLibraryPage.tsx
index ea200c6..13581d6 100644
--- a/web/src/pages/admin/pricing-library/PricingLibraryPage.tsx
+++ b/web/src/pages/admin/pricing-library/PricingLibraryPage.tsx
@@ -1,5 +1,6 @@
 import { useState } from 'react';
-import { useQuery, useMutation } from '@tanstack/react-query';
+import { Controller, useForm, type DefaultValues } from 'react-hook-form';
+import { zodResolver } from '@hookform/resolvers/zod';
 import {
   Box,
   Typography,
@@ -29,17 +30,18 @@ import AddIcon from '@mui/icons-material/Add';
 import EditIcon from '@mui/icons-material/Edit';
 import DeleteIcon from '@mui/icons-material/Delete';
 import ErrorOutlineIcon from '@mui/icons-material/ErrorOutlined';
-import { toast } from 'react-toastify';
 import {
-  pricingLibraryApi,
-  type PricingLibraryItem,
-  type PagedPricingLibraryResponse,
-  type CreatePricingLibraryItemRequest,
-  type UpdatePricingLibraryItemRequest,
-} from '../../../lib/api/pricingLibrary';
-import type { ServiceCategory } from '@proposal-system/api-contracts';
-import { queryClient } from '../../../lib/queryClient';
-import { QUERY_KEYS } from '../../../constants/queryKeys';
+  usePricingLibraryList,
+  useCreatePricingLibraryItem,
+  useUpdatePricingLibraryItem,
+  useDeletePricingLibraryItem,
+} from '../../../domain/pricingLibrary/use-cases';
+import type { PricingLibraryItem } from '../../../domain/pricingLibrary/types';
+import {
+  pricingLibraryItemFormSchema,
+  toPricingLibraryItemRequest,
+  type PricingLibraryItemFormValues,
+} from '../../../domain/pricingLibrary/schemas';
 import { DEFAULT_PAGE, DEFAULT_PAGE_SIZE, SERVICE_CATEGORIES } from '../../../constants';
 import { useDocumentTitle } from '../../../hooks/useDocumentTitle';
 
@@ -55,18 +57,12 @@ const CATEGORY_CHIP_STYLES: Record<string, { bgcolor: string; color: string; bor
   Other: { bgcolor: '#F1F5F9', color: '#475569', border: '1px solid #CBD5E1' },
 };
 
-interface ItemFormState {
-  title: string;
-  serviceCategory: ServiceCategory | '';
-  unit: string;
-  unitPrice: string;
-  keywords: string;
-  description: string;
-}
-
-const EMPTY_FORM: ItemFormState = {
+/**
+ * serviceCategory stays union-typed (ServiceCategory) in the form schema, so the
+ * create defaults leave it unset rather than using an out-of-union '' sentinel.
+ */
+const EMPTY_FORM_VALUES: DefaultValues<PricingLibraryItemFormValues> = {
   title: '',
-  serviceCategory: '',
   unit: '',
   unitPrice: '',
   keywords: '',
@@ -86,15 +82,7 @@ export default function PricingLibraryPage() {
   const [page, setPage] = useState(DEFAULT_PAGE);
   const [pageSize, setPageSize] = useState(DEFAULT_PAGE_SIZE);
 
-  const {
-    data,
-    isLoading,
-    isError,
-    refetch,
-  } = useQuery<PagedPricingLibraryResponse>({
-    queryKey: [QUERY_KEYS.pricingLibraryList, page, pageSize],
-    queryFn: () => pricingLibraryApi.list({ page, pageSize }),
-  });
+  const { data, isLoading, isError, refetch } = usePricingLibraryList({ page, pageSize });
 
   const rows = data?.items ?? [];
   const totalCount = data?.totalCount ?? 0;
@@ -102,21 +90,28 @@ export default function PricingLibraryPage() {
   // --- Create/Edit dialog state ---
   const [dialogOpen, setDialogOpen] = useState(false);
   const [editingItem, setEditingItem] = useState<PricingLibraryItem | null>(null);
-  const [form, setForm] = useState<ItemFormState>(EMPTY_FORM);
-  const [formErrors, setFormErrors] = useState<Partial<Record<keyof ItemFormState, string>>>({});
 
   const isEditing = editingItem !== null;
 
+  const {
+    control,
+    handleSubmit,
+    reset,
+    formState: { errors },
+  } = useForm<PricingLibraryItemFormValues>({
+    resolver: zodResolver(pricingLibraryItemFormSchema),
+    defaultValues: EMPTY_FORM_VALUES,
+  });
+
   const openCreateDialog = () => {
     setEditingItem(null);
-    setForm(EMPTY_FORM);
-    setFormErrors({});
+    reset(EMPTY_FORM_VALUES);
     setDialogOpen(true);
   };
 
   const openEditDialog = (item: PricingLibraryItem) => {
     setEditingItem(item);
-    setForm({
+    reset({
       title: item.title,
       serviceCategory: item.serviceCategory,
       unit: item.unit ?? '',
@@ -124,40 +119,13 @@ export default function PricingLibraryPage() {
       keywords: item.keywords ?? '',
       description: item.description ?? '',
     });
-    setFormErrors({});
     setDialogOpen(true);
   };
 
   const closeDialog = () => {
     setDialogOpen(false);
     setEditingItem(null);
-    setForm(EMPTY_FORM);
-    setFormErrors({});
-  };
-
-  const validateForm = (): boolean => {
-    const errors: Partial<Record<keyof ItemFormState, string>> = {};
-    if (!form.title.trim()) errors.title = 'Title is required';
-    if (!form.serviceCategory) errors.serviceCategory = 'Service category is required';
-    if (form.unitPrice.trim() !== '') {
-      const parsed = parseFloat(form.unitPrice);
-      if (isNaN(parsed) || parsed < 0) {
-        errors.unitPrice = 'Must be a number >= 0';
-      }
-    }
-    setFormErrors(errors);
-    return Object.keys(errors).length === 0;
-  };
-
-  const handleFieldChange = (field: keyof ItemFormState, value: string) => {
-    setForm((prev) => ({ ...prev, [field]: value }));
-    if (formErrors[field]) {
-      setFormErrors((prev) => {
-        const next = { ...prev };
-        delete next[field];
-        return next;
-      });
-    }
+    reset(EMPTY_FORM_VALUES);
   };
 
   // --- Delete confirm dialog state ---
@@ -171,67 +139,26 @@ export default function PricingLibraryPage() {
     setDeleteTarget(null);
   };
 
-  // --- Mutations ---
-  const createMutation = useMutation({
-    mutationFn: (data: CreatePricingLibraryItemRequest) => pricingLibraryApi.create(data),
-    onSuccess: () => {
-      queryClient.invalidateQueries({ queryKey: [QUERY_KEYS.pricingLibraryList] });
-      closeDialog();
-      toast.success('Pricing item created');
-    },
-    onError: (error: Error) => {
-      toast.error(`Failed to create item: ${error.message}`);
-    },
-  });
+  // --- Mutations (domain hooks own invalidation + toasts; dialog close stays here) ---
+  const createMutation = useCreatePricingLibraryItem();
+  const updateMutation = useUpdatePricingLibraryItem();
+  const deleteMutation = useDeletePricingLibraryItem();
 
-  const updateMutation = useMutation({
-    mutationFn: ({ id, data }: { id: string; data: UpdatePricingLibraryItemRequest }) =>
-      pricingLibraryApi.update(id, data),
-    onSuccess: () => {
-      queryClient.invalidateQueries({ queryKey: [QUERY_KEYS.pricingLibraryList] });
-      closeDialog();
-      toast.success('Pricing item updated');
-    },
-    onError: (error: Error) => {
-      toast.error(`Failed to update item: ${error.message}`);
-    },
-  });
-
-  const deleteMutation = useMutation({
-    mutationFn: (id: string) => pricingLibraryApi.remove(id),
-    onSuccess: () => {
-      queryClient.invalidateQueries({ queryKey: [QUERY_KEYS.pricingLibraryList] });
-      closeDeleteDialog();
-      toast.success('Pricing item deleted');
-    },
-    onError: (error: Error) => {
-      toast.error(`Failed to delete item: ${error.message}`);
-    },
-  });
-
-  const handleSubmit = () => {
-    if (!validateForm()) return;
-    if (!form.serviceCategory) return; // validateForm guarantees this; narrows '' out of the union
-
-    const payload = {
-      title: form.title.trim(),
-      serviceCategory: form.serviceCategory,
-      ...(form.unit.trim() ? { unit: form.unit.trim() } : {}),
-      unitPrice: form.unitPrice.trim() !== '' ? parseFloat(form.unitPrice) : null,
-      ...(form.keywords.trim() ? { keywords: form.keywords.trim() } : {}),
-      ...(form.description.trim() ? { description: form.description.trim() } : {}),
-    };
-
-    if (isEditing) {
-      updateMutation.mutate({ id: editingItem.id, data: payload });
+  const onSubmit = handleSubmit((values) => {
+    const payload = toPricingLibraryItemRequest(values);
+    if (editingItem) {
+      updateMutation.mutate(
+        { id: editingItem.id, data: payload },
+        { onSuccess: () => closeDialog() }
+      );
     } else {
-      createMutation.mutate(payload);
+      createMutation.mutate(payload, { onSuccess: () => closeDialog() });
     }
-  };
+  });
 
   const handleDeleteConfirm = () => {
     if (deleteTarget) {
-      deleteMutation.mutate(deleteTarget.id);
+      deleteMutation.mutate(deleteTarget.id, { onSuccess: () => closeDeleteDialog() });
     }
   };
 
@@ -368,90 +295,123 @@ export default function PricingLibraryPage() {
       {/* Create / Edit Dialog */}
       <Dialog open={dialogOpen} onClose={closeDialog} maxWidth="sm" fullWidth>
         <DialogTitle>{isEditing ? 'Edit Pricing Item' : 'New Pricing Item'}</DialogTitle>
-        <DialogContent>
-          <Box sx={{ display: 'flex', flexDirection: 'column', gap: 2, mt: 1 }}>
-            <TextField
-              label="Title"
-              value={form.title}
-              onChange={(e) => handleFieldChange('title', e.target.value)}
-              error={!!formErrors.title}
-              helperText={formErrors.title}
-              size="small"
-              required
-              fullWidth
-              autoFocus
-            />
-            <TextField
-              label="Service Category"
-              value={form.serviceCategory}
-              onChange={(e) => handleFieldChange('serviceCategory', e.target.value)}
-              error={!!formErrors.serviceCategory}
-              helperText={formErrors.serviceCategory}
-              size="small"
-              required
-              fullWidth
-              select
+        <form onSubmit={onSubmit} noValidate>
+          <DialogContent>
+            <Box sx={{ display: 'flex', flexDirection: 'column', gap: 2, mt: 1 }}>
+              <Controller
+                name="title"
+                control={control}
+                render={({ field }) => (
+                  <TextField
+                    {...field}
+                    label="Title"
+                    error={!!errors.title}
+                    helperText={errors.title?.message}
+                    size="small"
+                    required
+                    fullWidth
+                    autoFocus
+                  />
+                )}
+              />
+              <Controller
+                name="serviceCategory"
+                control={control}
+                render={({ field }) => (
+                  <TextField
+                    {...field}
+                    value={field.value ?? ''}
+                    label="Service Category"
+                    error={!!errors.serviceCategory}
+                    helperText={errors.serviceCategory ? 'Service category is required' : undefined}
+                    size="small"
+                    required
+                    fullWidth
+                    select
+                  >
+                    {SERVICE_CATEGORIES.map((cat) => (
+                      <MenuItem key={cat} value={cat}>
+                        {cat}
+                      </MenuItem>
+                    ))}
+                  </TextField>
+                )}
+              />
+              <Controller
+                name="unit"
+                control={control}
+                render={({ field }) => (
+                  <TextField
+                    {...field}
+                    label="Unit"
+                    helperText="e.g., each, hour, sq ft"
+                    size="small"
+                    fullWidth
+                  />
+                )}
+              />
+              <Controller
+                name="unitPrice"
+                control={control}
+                render={({ field }) => (
+                  <TextField
+                    {...field}
+                    label="Unit Price"
+                    type="number"
+                    error={!!errors.unitPrice}
+                    helperText={errors.unitPrice?.message || 'Optional. Leave blank if price varies.'}
+                    size="small"
+                    fullWidth
+                    slotProps={{
+                      htmlInput: { min: 0, step: '0.01' },
+                    }}
+                  />
+                )}
+              />
+              <Controller
+                name="keywords"
+                control={control}
+                render={({ field }) => (
+                  <TextField
+                    {...field}
+                    label="Keywords"
+                    helperText="Comma-separated keywords for AI matching."
+                    size="small"
+                    fullWidth
+                    multiline
+                    minRows={2}
+                  />
+                )}
+              />
+              <Controller
+                name="description"
+                control={control}
+                render={({ field }) => (
+                  <TextField
+                    {...field}
+                    label="Description"
+                    size="small"
+                    fullWidth
+                    multiline
+                    minRows={2}
+                  />
+                )}
+              />
+            </Box>
+          </DialogContent>
+          <DialogActions>
+            <Button onClick={closeDialog} disabled={isSaving}>
+              Cancel
+            </Button>
+            <Button
+              type="submit"
+              variant="contained"
+              disabled={isSaving}
             >
-              {SERVICE_CATEGORIES.map((cat) => (
-                <MenuItem key={cat} value={cat}>
-                  {cat}
-                </MenuItem>
-              ))}
-            </TextField>
-            <TextField
-              label="Unit"
-              value={form.unit}
-              onChange={(e) => handleFieldChange('unit', e.target.value)}
-              helperText="e.g., each, hour, sq ft"
-              size="small"
-              fullWidth
-            />
-            <TextField
-              label="Unit Price"
-              type="number"
-              value={form.unitPrice}
-              onChange={(e) => handleFieldChange('unitPrice', e.target.value)}
-              error={!!formErrors.unitPrice}
-              helperText={formErrors.unitPrice || 'Optional. Leave blank if price varies.'}
-              size="small"
-              fullWidth
-              slotProps={{
-                htmlInput: { min: 0, step: '0.01' },
-              }}
-            />
-            <TextField
-              label="Keywords"
-              value={form.keywords}
-              onChange={(e) => handleFieldChange('keywords', e.target.value)}
-              helperText="Comma-separated keywords for AI matching."
-              size="small"
-              fullWidth
-              multiline
-              minRows={2}
-            />
-            <TextField
-              label="Description"
-              value={form.description}
-              onChange={(e) => handleFieldChange('description', e.target.value)}
-              size="small"
-              fullWidth
-              multiline
-              minRows={2}
-            />
-          </Box>
-        </DialogContent>
-        <DialogActions>
-          <Button onClick={closeDialog} disabled={isSaving}>
-            Cancel
-          </Button>
-          <Button
-            variant="contained"
-            onClick={handleSubmit}
-            disabled={isSaving}
-          >
-            {isSaving ? (isEditing ? 'Saving...' : 'Creating...') : isEditing ? 'Save Changes' : 'Create Item'}
-          </Button>
-        </DialogActions>
+              {isSaving ? (isEditing ? 'Saving...' : 'Creating...') : isEditing ? 'Save Changes' : 'Create Item'}
+            </Button>
+          </DialogActions>
+        </form>
       </Dialog>
 
       {/* Delete Confirm Dialog */}