security: A01-13 — nest all event routes under organisation prefix

Move all authenticated organiser-facing event sub-resource routes from
/events/{event}/... to /organisations/{organisation}/events/{event}/...
to enforce multi-tenancy at the routing layer.

Changes:
- Routes: restructured api.php to nest all event sub-resources under
  the existing organisation prefix group
- Controllers: added Organisation parameter and VerifiesOrganisationEvent
  trait to all 12 affected controllers (sections, time-slots, shifts,
  persons, crowd-lists, locations, shift-assignments, registration-fields,
  availabilities, field-values, section-preferences, stats)
- Tests: updated all 20 feature test files with new route paths
- Frontend: updated 8 API composables and 20 Vue components/pages
- API.md: updated documentation to reflect new route structure

Portal routes, public routes (volunteer-register), and invitation routes
remain unchanged as they operate without organisation context.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/app/src/components/shifts/AssignPersonDialog.vue

@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import { useAssignablePersons, useAssignPersonToShift } from '@/composables/api/useShiftAssignments'
 import { getApiErrorMessage } from '@/lib/apiErrors'
+import { useAuthStore } from '@/stores/useAuthStore'
 import type { AssignablePerson } from '@/types/shiftAssignment'
 import type { Shift } from '@/types/section'
 
@@ -16,11 +17,13 @@ const emit = defineEmits<{
 
 const modelValue = defineModel<boolean>({ required: true })
 
+const authStore = useAuthStore()
+const orgIdRef = computed(() => authStore.currentOrganisation?.id ?? '')
 const eventIdRef = computed(() => props.eventId)
 const shiftIdRef = computed(() => props.shift?.id ?? '')
 
-const { data: assignableData, isLoading } = useAssignablePersons(eventIdRef, shiftIdRef)
-const { mutateAsync: assignPerson, isPending: isAssigning } = useAssignPersonToShift(eventIdRef)
+const { data: assignableData, isLoading } = useAssignablePersons(orgIdRef, eventIdRef, shiftIdRef)
+const { mutateAsync: assignPerson, isPending: isAssigning } = useAssignPersonToShift(orgIdRef, eventIdRef)
 
 // Search and filters
 const searchQuery = ref('')

apps/app/src/components/shifts/ShiftDetailPanel.vue

@@ -9,6 +9,7 @@ import {
 } from '@/composables/api/useShiftAssignments'
 import AssignPersonDialog from '@/components/shifts/AssignPersonDialog.vue'
 import { getApiErrorMessage } from '@/lib/apiErrors'
+import { useAuthStore } from '@/stores/useAuthStore'
 import { useShiftDetailStore } from '@/stores/useShiftDetailStore'
 import { ShiftAssignmentStatus } from '@/types/shiftAssignment'
 import type { ShiftAssignment } from '@/types/shiftAssignment'
@@ -21,7 +22,9 @@ const props = defineProps<{
 
 const modelValue = defineModel<boolean>({ required: true })
 
+const authStore = useAuthStore()
 const store = useShiftDetailStore()
+const orgIdRef = computed(() => authStore.currentOrganisation?.id ?? '')
 const eventIdRef = computed(() => props.eventId)
 
 // Fetch assignments filtered by this shift
@@ -34,16 +37,16 @@ const {
   isLoading: assignmentsLoading,
   isError: assignmentsError,
   refetch: refetchAssignments,
-} = useShiftAssignmentList(eventIdRef, filters)
+} = useShiftAssignmentList(orgIdRef, eventIdRef, filters)
 
 const assignments = computed(() => assignmentsResponse.value?.data ?? [])
 
 // Mutations
-const { mutate: approveAssignment, isPending: isApproving } = useApproveAssignment(eventIdRef)
-const { mutate: rejectAssignment, isPending: isRejecting } = useRejectAssignment(eventIdRef)
-const { mutate: cancelAssignment, isPending: isCancelling } = useCancelAssignment(eventIdRef)
-const { mutate: bulkApprove, isPending: isBulkApproving } = useBulkApproveAssignments(eventIdRef)
-const { mutateAsync: assignPersonMutation } = useAssignPersonToShift(eventIdRef)
+const { mutate: approveAssignment, isPending: isApproving } = useApproveAssignment(orgIdRef, eventIdRef)
+const { mutate: rejectAssignment, isPending: isRejecting } = useRejectAssignment(orgIdRef, eventIdRef)
+const { mutate: cancelAssignment, isPending: isCancelling } = useCancelAssignment(orgIdRef, eventIdRef)
+const { mutate: bulkApprove, isPending: isBulkApproving } = useBulkApproveAssignments(orgIdRef, eventIdRef)
+const { mutateAsync: assignPersonMutation } = useAssignPersonToShift(orgIdRef, eventIdRef)
 
 // Re-assign
 const reassigning = ref<string | null>(null)