Replace the shared MOCK_* fixtures with factories

A frozen shared constant forces a test needing one different field to
either mutate shared state, leaking into every other test, or spread it
by hand. The make*(overrides) factories cover both cases and were already
doing the same job, so the constants were redundant.

MOCK_PARENT_A and MOCK_PARENT_B were distinct identities that partner
tests tell apart, so their uuid and name are now passed explicitly at
each call site rather than left to a factory default -- the values those
tests depend on stay visible where they are used.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RXMhc9nT6sNz1SL4j8dznL

frontend/tests/fixtures/hooks.ts

@@ -26,7 +26,7 @@ import type { useVacationDays } from '@/hooks/useVacationDays'
 import type { useChildSettings } from '@/hooks/useChildSettings'
 import type { useCalendarDays } from '@/hooks/useCalendarDays'
 import type { useShowWeekNumbers } from '@/hooks/useCalendarPreferences'
-import { MOCK_CHILD, MOCK_PARENT_A, MOCK_VACATION_DAYS, MOCK_WORKSPACE, makeParentalLeaveFetch } from './mockData'
+import { makeChild, makePersonalData, makeVacationDays, makeWorkspace, makeParentalLeaveFetch } from './mockData'
 import { makeWorkspaceOverview } from './analytics'
 import { makeCalendarWindow } from './calendar'
 
@@ -37,18 +37,21 @@ import { makeCalendarWindow } from './calendar'
 export function makeWorkspaceContextValue(
   overrides: Partial<ReturnType<typeof useWorkspace>> = {},
 ): ReturnType<typeof useWorkspace> {
+  const workspace = makeWorkspace()
+  const child = makeChild()
+  const parent = makePersonalData({ uuid: 'pd-a', name: 'Förälder A' })
   return {
-    workspace: MOCK_WORKSPACE,
+    workspace,
     isLoading: false,
     error: null,
-    workspaceId: MOCK_WORKSPACE.id,
+    workspaceId: workspace.id,
     setWorkspaceId: vi.fn(),
     refetch: vi.fn(),
-    children: [{ id: MOCK_CHILD.id, name: MOCK_CHILD.name, birth_date: MOCK_CHILD.birthDate }],
-    selectedChildId: MOCK_CHILD.id,
+    children: [{ id: child.id, name: child.name, birth_date: child.birthDate }],
+    selectedChildId: child.id,
     selectChild: vi.fn(),
-    personalDataUuid: MOCK_PARENT_A.uuid,
-    parentName: MOCK_PARENT_A.name,
+    personalDataUuid: parent.uuid,
+    parentName: parent.name,
     refreshContext: vi.fn(),
     ...overrides,
   }
@@ -132,7 +135,7 @@ export function makeWorkspaceMembersResult(
   overrides: Partial<ReturnType<typeof useWorkspaceMembers>> = {},
 ): ReturnType<typeof useWorkspaceMembers> {
   return {
-    data: [MOCK_PARENT_A],
+    data: [makePersonalData({ uuid: 'pd-a', name: 'Förälder A' })],
     isLoading: false,
     error: null,
     refresh: vi.fn(),
@@ -210,7 +213,7 @@ export function makeVacationDaysResult(
   overrides: Partial<ReturnType<typeof useVacationDays>> = {},
 ): ReturnType<typeof useVacationDays> {
   return {
-    data: [MOCK_VACATION_DAYS],
+    data: [makeVacationDays()],
     isLoading: false,
     error: null,
     upsert: vi.fn(),
@@ -222,7 +225,7 @@ export function makeChildSettingsResult(
   overrides: Partial<ReturnType<typeof useChildSettings>> = {},
 ): ReturnType<typeof useChildSettings> {
   return {
-    data: MOCK_CHILD,
+    data: makeChild(),
     isLoading: false,
     error: null,
     update: vi.fn(),