diff --git a/client/src/components/reservation/ReservationManualReviewResolutionPanel.vue b/client/src/components/reservation/ReservationManualReviewResolutionPanel.vue
index 7ac0b37..6115189 100644
--- a/client/src/components/reservation/ReservationManualReviewResolutionPanel.vue
+++ b/client/src/components/reservation/ReservationManualReviewResolutionPanel.vue
@@ -55,14 +55,14 @@
         >
           <label
             v-for="(item, index) in supportedMissingFields"
-            :key="item.pointer"
+            :key="item.key"
           >
             <span>
               {{ item.label }}
-              <small class="th-code">{{ item.pointer }}</small>
+              <small class="th-code">{{ item.pointer ?? item.fieldPath }}</small>
             </span>
             <input
-              v-model="fieldOverrideInputs[item.pointer]"
+              v-model="fieldOverrideInputs[item.key]"
               :name="`manual_resolution_field_override_${index}`"
               type="text"
               :disabled="busy"
@@ -124,11 +124,15 @@ import type {
   ReservationTaskFieldResult,
 } from '@/types/reservation'
 import { normalizeStableCode } from '@/utils/reservationDisplay'
+import { readReservationFieldValue } from '@/utils/reservationFieldRules'
 
-const supportedFieldPointers = [
-  '/extracted_fields/pms_room_type_code',
-  '/extracted_fields/room_items/0/pms_room_type_code',
-] as const
+interface ManualResolutionFieldItem {
+  key: string
+  pointer?: string
+  fieldPath: string
+  label: string
+  field?: ReservationTaskFieldResult
+}
 
 const props = withDefaults(
   defineProps<{
@@ -163,17 +167,14 @@ const isResolved = computed(() => normalizeStableCode(props.reviewStatus) === 'R
 const reviewStatusLabel = computed(() => props.reviewStatus || t('task.manualResolution.pendingStatus'))
 const supportedMissingFields = computed(() =>
   extractMissingFields(props.manualReview)
-    .filter((pointer) => supportedFieldPointers.includes(pointer as (typeof supportedFieldPointers)[number]))
-    .map((pointer) => ({
-      pointer,
-      label: findFieldLabel(pointer),
-    })),
+    .map((reference) => resolveMissingField(reference))
+    .filter((item): item is ManualResolutionFieldItem => item !== null),
 )
 const canSubmit = computed(() => {
   if (!supportedMissingFields.value.length || !confirmedOrderId.value.trim()) {
     return false
   }
-  return supportedMissingFields.value.every((item) => String(fieldOverrideInputs.value[item.pointer] ?? '').trim())
+  return supportedMissingFields.value.every((item) => String(fieldOverrideInputs.value[item.key] ?? '').trim())
 })
 
 watch(
@@ -188,7 +189,7 @@ watch(
   (items) => {
     const nextInputs: Record<string, string> = {}
     items.forEach((item) => {
-      nextInputs[item.pointer] = fieldOverrideInputs.value[item.pointer] || readCurrentFieldValue(item.pointer)
+      nextInputs[item.key] = fieldOverrideInputs.value[item.key] || readCurrentFieldValue(item)
     })
     fieldOverrideInputs.value = nextInputs
   },
@@ -206,8 +207,9 @@ function submitResolution(): void {
     confirmed_order_id: confirmedOrderId.value.trim(),
     reason: reason.value.trim() || undefined,
     field_overrides: supportedMissingFields.value.map((item) => ({
-      field_pointer: item.pointer,
-      value: String(fieldOverrideInputs.value[item.pointer] ?? '').trim(),
+      ...(item.pointer ? { field_pointer: item.pointer } : {}),
+      field_path: item.fieldPath,
+      value: String(fieldOverrideInputs.value[item.key] ?? '').trim(),
     })),
   })
 }
@@ -217,24 +219,37 @@ function extractMissingFields(manualReview: ReservationRecord | null | undefined
   if (!Array.isArray(missingFields)) {
     return []
   }
-  return missingFields.filter((item): item is string => typeof item === 'string' && item.startsWith('/'))
+  return missingFields.filter((item): item is string => typeof item === 'string' && item.trim() !== '')
 }
 
-function findFieldLabel(pointer: string): string {
-  const fieldPath = fieldPointerToFieldPath(pointer)
-  return props.fields.find((field) => field.field_path === fieldPath)?.display_name ?? fieldPath
+function resolveMissingField(reference: string): ManualResolutionFieldItem | null {
+  const pointer = reference.startsWith('/') ? reference : undefined
+  const referenceFieldPath = pointer ? fieldPointerToFieldPath(pointer) : reference
+  const field = props.fields.find((item) =>
+    item.field_pointer === reference ||
+    item.field_path === referenceFieldPath ||
+    item.legacy_field_path === referenceFieldPath,
+  )
+  if (field) {
+    return {
+      key: field.field_pointer ?? field.field_path,
+      pointer: field.field_pointer ?? pointer,
+      fieldPath: field.field_path,
+      label: field.display_name,
+      field,
+    }
+  }
+  return null
 }
 
-function readCurrentFieldValue(pointer: string): string {
-  const fieldPath = fieldPointerToFieldPath(pointer)
-  const value = props.fieldValues[fieldPath] ?? props.fields.find((field) => field.field_path === fieldPath)?.value
+function readCurrentFieldValue(item: ManualResolutionFieldItem): string {
+  const value = item.field
+    ? readReservationFieldValue(item.field, props.fieldValues)
+    : props.fieldValues[item.fieldPath]
   return value === undefined || value === null ? '' : String(value)
 }
 
 function fieldPointerToFieldPath(pointer: string): string {
-  if (pointer === '/extracted_fields/room_items/0/pms_room_type_code') {
-    return 'extracted_fields.pms_room_type_code'
-  }
   return pointer.replace(/^\//, '').replace(/\//g, '.')
 }
 
diff --git a/client/src/components/reservation/ReservationTaskDetailPanel.vue b/client/src/components/reservation/ReservationTaskDetailPanel.vue
index 8232762..8edddae 100644
--- a/client/src/components/reservation/ReservationTaskDetailPanel.vue
+++ b/client/src/components/reservation/ReservationTaskDetailPanel.vue
@@ -594,7 +594,11 @@ async function mutateTaskPayload(action: 'save' | 'confirm'): Promise<void> {
 function applyTaskData(nextDetail: ReservationTaskDetailResult, nextAudits: ReservationTaskAuditLogResult[]): void {
   detail.value = nextDetail
   audits.value = nextAudits
-  fieldValues.value = buildInitialFieldValues(nextDetail.fields, nextDetail.draft_payload ?? nextDetail.confirmed_payload)
+  fieldValues.value = buildInitialFieldValues(
+    nextDetail.fields,
+    nextDetail.draft_payload ?? nextDetail.confirmed_payload,
+    nextDetail.field_contract_version,
+  )
   validationErrors.value = {}
   validationSummaryActive.value = false
 }
diff --git a/client/src/components/reservation/ReservationTaskFieldRenderer.vue b/client/src/components/reservation/ReservationTaskFieldRenderer.vue
index 61e3ce2..0d0a9f4 100644
--- a/client/src/components/reservation/ReservationTaskFieldRenderer.vue
+++ b/client/src/components/reservation/ReservationTaskFieldRenderer.vue
@@ -115,6 +115,7 @@ import {
   isReservationFieldRequired,
   isSelectField,
   isTableField,
+  readReservationFieldValue,
   parseEnumOptions,
   stringifyReservationValue,
 } from '@/utils/reservationFieldRules'
@@ -135,7 +136,7 @@ const { t } = useI18n()
 const fieldGroups = computed(() => groupReservationFields(props.fields, t('task.fieldAreaFallback'), props.modelValue))
 
 function fieldValue(field: ReservationTaskFieldResult): string | number | readonly string[] {
-  const value = props.modelValue[field.field_path] ?? field.value ?? ''
+  const value = readReservationFieldValue(field, props.modelValue)
   if (Array.isArray(value)) {
     return value.map((item) => stringifyReservationValue(item, t('task.emptyValue')))
   }
diff --git a/client/src/fixtures/reservation.ts b/client/src/fixtures/reservation.ts
index 6e342f7..ea97029 100644
--- a/client/src/fixtures/reservation.ts
+++ b/client/src/fixtures/reservation.ts
@@ -34,16 +34,17 @@ const v3MessageEventFixture: ReservationRecord = {
     history_message_count: 1,
   },
   extracted_fields: {
-    pms_room_type_code: null,
     room_items: [
       {
+        room_quantity: 1,
+        room_type_raw: 'Deluxe Q1A',
         pms_room_type_code: null,
       },
     ],
   },
   manual_review: {
     reason_code: 'missing_room_type_code',
-    missing_fields: ['/extracted_fields/pms_room_type_code'],
+    missing_fields: ['/extracted_fields/room_items/0/pms_room_type_code'],
   },
 }
 
@@ -577,7 +578,7 @@ export const reservationTaskDetails: ReservationTaskDetailResult[] = [
     manual_review: {
       reason_code: 'missing_room_type_code',
       review_instruction: '请确认 PMS 房型代码后解阻原任务卡。',
-      missing_fields: ['/extracted_fields/pms_room_type_code'],
+      missing_fields: ['/extracted_fields/room_items/0/pms_room_type_code'],
       source_message: {
         ...v3SourceMessageFixture,
         source_message_id: '900085',
@@ -599,7 +600,7 @@ export const reservationTaskDetails: ReservationTaskDetailResult[] = [
     system_task_type: 'NEW_BOOKING',
     task_card_type: 'NEW_BOOKING',
     task_status: 'BLOCKED',
-    field_contract_version: 'reservation-task-card-v3',
+    field_contract_version: '20260711-p0',
     draft_payload: null,
     confirmed_payload: null,
     availability: {
@@ -619,12 +620,14 @@ export const reservationTaskDetails: ReservationTaskDetailResult[] = [
         task_type: 'NEW_BOOKING',
         task_subtype: 'NEW_BOOKING',
         display_area: '预订信息',
-        field_path: 'extracted_fields.pms_room_type_code',
+        field_path: 'extracted_fields.room_items.0.pms_room_type_code',
+        field_pointer: '/extracted_fields/room_items/0/pms_room_type_code',
+        legacy_field_path: 'extracted_fields.pms_room_type_code',
         display_name: 'PMS 房型代码',
         default_value_source: 'manual_review',
         visible: 'Y',
-        editable: 'N',
-        input_editable: 'N',
+        editable: 'Y',
+        input_editable: 'Y',
         select_editable: 'N',
         date_picker: 'N',
         number_input: 'N',
@@ -634,7 +637,7 @@ export const reservationTaskDetails: ReservationTaskDetailResult[] = [
         required_rule: 'Y',
         display_condition: null,
         validation_rule: null,
-        write_path: 'extracted_fields.pms_room_type_code',
+        write_path: 'extracted_fields.room_items.0.pms_room_type_code',
         opera_write_participation: 'Y',
         opera_parameter_mapping: 'roomTypeCode',
         notes: 'V3 同卡人工复核缺失字段。',
@@ -766,7 +769,7 @@ export const reservationTaskAudits: ReservationTaskAuditListResult[] = [
         after_snapshot: {
           result_type: 'manual_review',
           review_status: 'PENDING',
-          missing_fields: ['/extracted_fields/pms_room_type_code'],
+          missing_fields: ['/extracted_fields/room_items/0/pms_room_type_code'],
         },
         occurred_at: '2026-07-08T08:15:00+08:00',
       },
diff --git a/client/src/services/reservationService.ts b/client/src/services/reservationService.ts
index 70bf5bd..43d233a 100644
--- a/client/src/services/reservationService.ts
+++ b/client/src/services/reservationService.ts
@@ -14,6 +14,7 @@ import type {
   ReservationOrderDetailResult,
   ReservationOrderListFilters,
   ReservationOrderListResult,
+  ReservationRecord,
   ReservationTaskAuditListResult,
   ReservationTaskDetailResult,
   ReservationTaskListFilters,
@@ -201,8 +202,8 @@ function fixtureManualReviewResolution(
   request: ReservationManualReviewResolutionRequest,
 ): Promise<ReservationManualReviewResolutionResult> {
   return fixtureTaskDetail(taskId).then((detail) => {
-    const confirmedPayload = Object.fromEntries(
-      request.field_overrides.map((item) => [fieldPointerToFixturePath(item.field_pointer), item.value]),
+    const fieldValues = Object.fromEntries(
+      request.field_overrides.map((item) => [fieldOverrideToFixturePath(item), item.value]),
     )
     return {
       task_id: detail.task_id,
@@ -215,19 +216,86 @@ function fixtureManualReviewResolution(
         field_overrides: request.field_overrides,
       },
       confirmed_payload: {
-        ...(detail.confirmed_payload ?? {}),
-        ...confirmedPayload,
+        field_values: fieldValues,
+        legacy_field_values: legacyFieldValues(fieldValues),
+        effective_payload: effectivePayload(fieldValues),
       },
       opera_operations: detail.opera_operations,
     }
   })
 }
 
-function fieldPointerToFixturePath(fieldPointer: string): string {
-  if (fieldPointer === '/extracted_fields/room_items/0/pms_room_type_code') {
-    return 'extracted_fields.pms_room_type_code'
+function fieldOverrideToFixturePath(
+  fieldOverride: ReservationManualReviewResolutionRequest['field_overrides'][number],
+): string {
+  if (fieldOverride.field_path) {
+    return canonicalFixtureFieldPath(fieldOverride.field_path)
   }
-  return fieldPointer.replace(/^\//, '').replace(/\//g, '.')
+  if (fieldOverride.field_pointer) {
+    return canonicalFixtureFieldPath(fieldOverride.field_pointer.replace(/^\//, '').replace(/\//g, '.'))
+  }
+  throw new Error('Manual review field override requires field_pointer or field_path')
+}
+
+function canonicalFixtureFieldPath(fieldPath: string): string {
+  if (fieldPath === 'extracted_fields.room_quantity') {
+    return 'extracted_fields.room_items.0.room_quantity'
+  }
+  if (fieldPath === 'extracted_fields.room_type') {
+    return 'extracted_fields.room_items.0.room_type_raw'
+  }
+  if (fieldPath === 'extracted_fields.pms_room_type_code') {
+    return 'extracted_fields.room_items.0.pms_room_type_code'
+  }
+  return fieldPath
+}
+
+function legacyFieldValues(fieldValues: Record<string, unknown>): Record<string, unknown> {
+  return Object.entries(fieldValues).reduce<Record<string, unknown>>((legacyValues, [fieldPath, value]) => {
+    if (fieldPath === 'extracted_fields.room_items.0.room_quantity') {
+      legacyValues['extracted_fields.room_quantity'] = value
+    }
+    if (fieldPath === 'extracted_fields.room_items.0.room_type_raw') {
+      legacyValues['extracted_fields.room_type'] = value
+    }
+    if (fieldPath === 'extracted_fields.room_items.0.pms_room_type_code') {
+      legacyValues['extracted_fields.pms_room_type_code'] = value
+    }
+    return legacyValues
+  }, {})
+}
+
+function effectivePayload(fieldValues: Record<string, unknown>): ReservationRecord {
+  return Object.entries(fieldValues).reduce<ReservationRecord>((payload, [fieldPath, value]) => {
+    writeNestedFieldValue(payload, fieldPath, value)
+    return payload
+  }, {})
+}
+
+function writeNestedFieldValue(payload: ReservationRecord, fieldPath: string, value: unknown): void {
+  const segments = fieldPath.split('.')
+  let current: ReservationRecord | unknown[] = payload
+  segments.forEach((segment, index) => {
+    const last = index === segments.length - 1
+    const nextSegment = segments[index + 1]
+    if (last) {
+      if (Array.isArray(current)) {
+        current[Number(segment)] = value
+      } else {
+        current[segment] = value
+      }
+      return
+    }
+    const nextIsArray = nextSegment !== undefined && /^\d+$/.test(nextSegment)
+    if (Array.isArray(current)) {
+      const arrayIndex = Number(segment)
+      current[arrayIndex] ??= nextIsArray ? [] : {}
+      current = current[arrayIndex] as ReservationRecord | unknown[]
+      return
+    }
+    current[segment] ??= nextIsArray ? [] : {}
+    current = current[segment] as ReservationRecord | unknown[]
+  })
 }
 
 async function fixtureOperaOperation(
diff --git a/client/src/tests/reservationFieldRules.spec.ts b/client/src/tests/reservationFieldRules.spec.ts
index 6cca49d..c4d1089 100644
--- a/client/src/tests/reservationFieldRules.spec.ts
+++ b/client/src/tests/reservationFieldRules.spec.ts
@@ -2,6 +2,7 @@ import { describe, expect, it } from 'vitest'
 
 import type { ReservationTaskFieldResult } from '@/types/reservation'
 import {
+  buildInitialFieldValues,
   buildEditableFieldValues,
   groupReservationFields,
   validateReservationFieldValues,
@@ -147,4 +148,156 @@ describe('validateReservationFieldValues', () => {
       'case_keys.group_code': 'GRP-001',
     })
   })
+
+  it('hydrates P0 room_items fields from field_values and submits main field_path keys', () => {
+    const roomTypeField = createField({
+      field_path: 'extracted_fields.room_items.0.room_type_raw',
+      field_pointer: '/extracted_fields/room_items/0/room_type_raw',
+      legacy_field_path: 'extracted_fields.room_type',
+      display_name: '房型原文',
+    })
+    const pmsCodeField = createField({
+      field_path: 'extracted_fields.room_items.0.pms_room_type_code',
+      field_pointer: '/extracted_fields/room_items/0/pms_room_type_code',
+      legacy_field_path: 'extracted_fields.pms_room_type_code',
+      display_name: 'PMS 房型代码',
+    })
+
+    const values = buildInitialFieldValues(
+      [roomTypeField, pmsCodeField],
+      {
+        field_values: {
+          'extracted_fields.room_items.0.room_type_raw': 'Deluxe Q1A',
+          'extracted_fields.room_items.0.pms_room_type_code': 'Q1A',
+        },
+      },
+      '20260711-p0',
+    )
+    const payload = buildEditableFieldValues([roomTypeField, pmsCodeField], values, false)
+
+    expect(values).toMatchObject({
+      'extracted_fields.room_items.0.room_type_raw': 'Deluxe Q1A',
+      'extracted_fields.room_items.0.pms_room_type_code': 'Q1A',
+    })
+    expect(payload).toEqual({
+      'extracted_fields.room_items.0.room_type_raw': 'Deluxe Q1A',
+      'extracted_fields.room_items.0.pms_room_type_code': 'Q1A',
+    })
+    expect(payload).not.toHaveProperty('extracted_fields.room_type')
+    expect(payload).not.toHaveProperty('extracted_fields.pms_room_type_code')
+  })
+
+  it('hydrates P0 fields from nested field_values as a defensive fallback', () => {
+    const values = buildInitialFieldValues(
+      [
+        createField({
+          field_path: 'extracted_fields.room_items.0.room_quantity',
+          field_pointer: '/extracted_fields/room_items/0/room_quantity',
+          legacy_field_path: 'extracted_fields.room_quantity',
+          display_name: '房间数量',
+        }),
+      ],
+      {
+        field_values: {
+          extracted_fields: {
+            room_items: [
+              {
+                room_quantity: 2,
+              },
+            ],
+          },
+        },
+      },
+      '20260711-p0',
+    )
+
+    expect(values).toEqual({
+      'extracted_fields.room_items.0.room_quantity': 2,
+    })
+  })
+
+  it('hydrates code-v1 historical fields from legacy_field_values into P0 main keys', () => {
+    const values = buildInitialFieldValues(
+      [
+        createField({
+          field_path: 'extracted_fields.room_items.0.pms_room_type_code',
+          field_pointer: '/extracted_fields/room_items/0/pms_room_type_code',
+          legacy_field_path: 'extracted_fields.pms_room_type_code',
+          display_name: 'PMS 房型代码',
+        }),
+      ],
+      {
+        field_values: {
+          'extracted_fields.room_items.0.pms_room_type_code': 'NEW',
+        },
+        legacy_field_values: {
+          'extracted_fields.pms_room_type_code': 'LEGACY',
+        },
+      },
+      'code-v1',
+    )
+
+    expect(values).toEqual({
+      'extracted_fields.room_items.0.pms_room_type_code': 'LEGACY',
+    })
+  })
+
+  it('hydrates code-v1 historical fields from legacy effective_payload when legacy_field_values is absent', () => {
+    const values = buildInitialFieldValues(
+      [
+        createField({
+          field_path: 'extracted_fields.room_items.0.pms_room_type_code',
+          field_pointer: '/extracted_fields/room_items/0/pms_room_type_code',
+          legacy_field_path: 'extracted_fields.pms_room_type_code',
+          display_name: 'PMS 房型代码',
+        }),
+      ],
+      {
+        effective_payload: {
+          extracted_fields: {
+            pms_room_type_code: 'LEGACY-NESTED',
+          },
+        },
+      },
+      'code-v1',
+    )
+
+    expect(values).toEqual({
+      'extracted_fields.room_items.0.pms_room_type_code': 'LEGACY-NESTED',
+    })
+  })
+
+  it('does not create frontend required errors for readonly evidence fields missing in V3 payloads', () => {
+    const errors = validateReservationFieldValues(
+      [
+        createField({
+          field_path: 'visible_reason',
+          display_name: '生成原因',
+          editable: 'N',
+          input_editable: 'N',
+          required_rule: 'Y',
+          value: null,
+        }),
+        createField({
+          field_path: 'extracted_fields.room_items.0.pms_room_type_code',
+          display_name: 'PMS 房型代码',
+          field_pointer: '/extracted_fields/room_items/0/pms_room_type_code',
+          legacy_field_path: 'extracted_fields.pms_room_type_code',
+          required_rule: 'Y',
+          value: '',
+        }),
+      ],
+      {
+        relevant_message_excerpt: 'Please book a Deluxe Q1A room.',
+        'extracted_fields.room_items.0.pms_room_type_code': '',
+      },
+    )
+
+    expect(errors).toEqual({
+      'extracted_fields.room_items.0.pms_room_type_code': {
+        code: 'required',
+        field_name: 'PMS 房型代码',
+      },
+    })
+  })
 })
diff --git a/client/src/tests/reservationService.spec.ts b/client/src/tests/reservationService.spec.ts
index f610550..e8083a9 100644
--- a/client/src/tests/reservationService.spec.ts
+++ b/client/src/tests/reservationService.spec.ts
@@ -245,13 +245,20 @@ describe('reservationService real API mode', () => {
           confirmed_order_id: '20001',
           field_overrides: [
             {
-              field_pointer: '/extracted_fields/pms_room_type_code',
+              field_pointer: '/extracted_fields/room_items/0/pms_room_type_code',
+              field_path: 'extracted_fields.room_items.0.pms_room_type_code',
+              legacy_field_path: 'extracted_fields.pms_room_type_code',
               value: 'RM3',
             },
           ],
         },
         confirmed_payload: {
-          'extracted_fields.pms_room_type_code': 'RM3',
+          field_values: {
+            'extracted_fields.room_items.0.pms_room_type_code': 'RM3',
+          },
+          legacy_field_values: {
+            'extracted_fields.pms_room_type_code': 'RM3',
+          },
         },
         opera_operations: [],
       }),
@@ -262,7 +269,8 @@ describe('reservationService real API mode', () => {
       reason: '确认 PMS 房型代码',
       field_overrides: [
         {
-          field_pointer: '/extracted_fields/pms_room_type_code',
+          field_pointer: '/extracted_fields/room_items/0/pms_room_type_code',
+          field_path: 'extracted_fields.room_items.0.pms_room_type_code',
           value: 'RM3',
         },
       ],
@@ -280,7 +288,8 @@ describe('reservationService real API mode', () => {
           reason: '确认 PMS 房型代码',
           field_overrides: [
             {
-              field_pointer: '/extracted_fields/pms_room_type_code',
+              field_pointer: '/extracted_fields/room_items/0/pms_room_type_code',
+              field_path: 'extracted_fields.room_items.0.pms_room_type_code',
               value: 'RM3',
             },
           ],
diff --git a/client/src/tests/reservationTaskDetailPanel.spec.ts b/client/src/tests/reservationTaskDetailPanel.spec.ts
index f44fb23..b11c75b 100644
--- a/client/src/tests/reservationTaskDetailPanel.spec.ts
+++ b/client/src/tests/reservationTaskDetailPanel.spec.ts
@@ -149,13 +149,20 @@ function createManualReviewResolutionResult(
       confirmed_order_id: '20001',
       field_overrides: [
         {
-          field_pointer: '/extracted_fields/pms_room_type_code',
+          field_pointer: '/extracted_fields/room_items/0/pms_room_type_code',
+          field_path: 'extracted_fields.room_items.0.pms_room_type_code',
+          legacy_field_path: 'extracted_fields.pms_room_type_code',
           value: 'RM3',
         },
       ],
     },
     confirmed_payload: {
-      'extracted_fields.pms_room_type_code': 'RM3',
+      field_values: {
+        'extracted_fields.room_items.0.pms_room_type_code': 'RM3',
+      },
+      legacy_field_values: {
+        'extracted_fields.pms_room_type_code': 'RM3',
+      },
     },
     opera_operations: [],
     ...overrides,
@@ -424,6 +431,48 @@ describe('ReservationTaskDetailPanel', () => {
     expect(wrapper.text()).not.toContain('房型为必填项')
   })
 
+  it('hydrates code-v1 legacy payload values but saves future drafts with P0 field paths', async () => {
+    vi.mocked(service.fetchReservationTaskDetail).mockResolvedValue(
+      createTaskDetail({
+        field_contract_version: 'code-v1',
+        draft_payload: {
+          field_values: {
+            'extracted_fields.room_items.0.pms_room_type_code': 'P0-SHOULD-NOT-WIN',
+          },
+          legacy_field_values: {
+            'extracted_fields.pms_room_type_code': 'LEGACY-RM',
+          },
+        },
+        fields: [
+          createRequiredField({
+            field_path: 'extracted_fields.room_items.0.pms_room_type_code',
+            field_pointer: '/extracted_fields/room_items/0/pms_room_type_code',
+            legacy_field_path: 'extracted_fields.pms_room_type_code',
+            display_name: 'PMS 房型代码',
+            value: null,
+          }),
+        ],
+      }),
+    )
+    vi.mocked(service.saveReservationTaskDraft).mockResolvedValue(createMutationResult())
+
+    const wrapper = await mountPanel()
+    const pmsInput = wrapper.find('textarea')
+
+    expect((pmsInput.element as HTMLTextAreaElement).value).toBe('LEGACY-RM')
+    expect(wrapper.text()).not.toContain('P0-SHOULD-NOT-WIN')
+
+    await pmsInput.setValue('RM4')
+    await findButton(wrapper, '保存草稿').trigger('click')
+    await flushPromises()
+
+    expect(service.saveReservationTaskDraft).toHaveBeenCalledWith('10001', {
+      field_values: {
+        'extracted_fields.room_items.0.pms_room_type_code': 'RM4',
+      },
+    })
+  })
+
   it('refreshes audit records after saving a draft', async () => {
     vi.mocked(service.fetchReservationTaskAudits)
       .mockResolvedValueOnce({
@@ -551,7 +600,7 @@ describe('ReservationTaskDetailPanel', () => {
           review_status: 'PENDING',
           manual_review: {
             reason_code: 'missing_room_type_code',
-            missing_fields: ['/extracted_fields/pms_room_type_code'],
+            missing_fields: ['/extracted_fields/room_items/0/pms_room_type_code'],
             review_instruction: '请补充 PMS 房型代码。',
           },
           availability: {
@@ -565,7 +614,9 @@ describe('ReservationTaskDetailPanel', () => {
           },
           fields: [
             createRequiredField({
-              field_path: 'extracted_fields.pms_room_type_code',
+              field_path: 'extracted_fields.room_items.0.pms_room_type_code',
+              field_pointer: '/extracted_fields/room_items/0/pms_room_type_code',
+              legacy_field_path: 'extracted_fields.pms_room_type_code',
               display_name: 'PMS 房型代码',
               editable: 'N',
               input_editable: 'N',
@@ -587,7 +638,9 @@ describe('ReservationTaskDetailPanel', () => {
             confirmed_order_id: '20001',
             field_overrides: [
               {
-                field_pointer: '/extracted_fields/pms_room_type_code',
+                field_pointer: '/extracted_fields/room_items/0/pms_room_type_code',
+                field_path: 'extracted_fields.room_items.0.pms_room_type_code',
+                legacy_field_path: 'extracted_fields.pms_room_type_code',
                 value: 'RM3',
               },
             ],
@@ -621,7 +674,7 @@ describe('ReservationTaskDetailPanel', () => {
     expect(wrapper.text()).toContain('任务卡类型')
     expect(wrapper.text()).toContain('NEW_BOOKING_MANUAL_REVIEW')
     expect(wrapper.text()).toContain('人工复核解阻')
-    expect(wrapper.text()).toContain('/extracted_fields/pms_room_type_code')
+    expect(wrapper.text()).toContain('/extracted_fields/room_items/0/pms_room_type_code')
     expect(wrapper.text()).toContain('PMS 房型代码')
     expect(wrapper.text()).not.toContain('人工转换')
     expect(wrapper.text()).not.toContain('保存草稿')
@@ -638,7 +691,8 @@ describe('ReservationTaskDetailPanel', () => {
       reason: '确认 PMS 房型代码',
       field_overrides: [
         {
-          field_pointer: '/extracted_fields/pms_room_type_code',
+          field_pointer: '/extracted_fields/room_items/0/pms_room_type_code',
+          field_path: 'extracted_fields.room_items.0.pms_room_type_code',
           value: 'RM3',
         },
       ],
diff --git a/client/src/types/reservation.ts b/client/src/types/reservation.ts
index 4224a32..a5fa9c4 100644
--- a/client/src/types/reservation.ts
+++ b/client/src/types/reservation.ts
@@ -296,6 +296,8 @@ export interface ReservationTaskFieldResult {
   task_subtype?: string | null
   display_area: string | null
   field_path: string
+  field_pointer?: string | null
+  legacy_field_path?: string | null
   display_name: string
   default_value_source?: string | null
   visible: string | null
@@ -406,8 +408,13 @@ export interface ReservationManualReviewConversionResult {
   original_order_logic_deleted: boolean
 }
 
-export interface ReservationManualReviewResolutionFieldOverrideRequest {
+export type ReservationManualReviewResolutionFieldOverrideRequest = {
   field_pointer: string
+  field_path?: string
+  value: unknown
+} | {
+  field_pointer?: string
+  field_path: string
   value: unknown
 }
 
diff --git a/client/src/utils/reservationFieldRules.ts b/client/src/utils/reservationFieldRules.ts
index bb8dde9..93bc200 100644
--- a/client/src/utils/reservationFieldRules.ts
+++ b/client/src/utils/reservationFieldRules.ts
@@ -2,6 +2,20 @@ import type { ReservationRecord, ReservationTaskFieldResult } from '@/types/rese
 
 const truthyRuleValues = new Set(['Y', 'YES', 'TRUE', '1', '是', '可编辑', 'ENABLED'])
 const falsyRuleValues = new Set(['N', 'NO', 'FALSE', '0', '否', '不可编辑', 'DISABLED', '隐藏'])
+const roomItemFieldPathAliases: Record<string, string[]> = {
+  'extracted_fields.room_quantity': ['extracted_fields.room_items.0.room_quantity'],
+  'extracted_fields.room_type': [
+    'extracted_fields.room_items.0.room_type_raw',
+    'extracted_fields.room_items.0.room_type_normalized',
+  ],
+  'extracted_fields.pms_room_type_code': ['extracted_fields.room_items.0.pms_room_type_code'],
+  'extracted_fields.room_items.0.room_quantity': ['extracted_fields.room_quantity'],
+  'extracted_fields.room_items.0.room_type_raw': [
+    'extracted_fields.room_type',
+    'extracted_fields.room_items.0.room_type_normalized',
+  ],
+  'extracted_fields.room_items.0.pms_room_type_code': ['extracted_fields.pms_room_type_code'],
+}
 
 export interface FieldAreaGroup {
   area: string
@@ -166,9 +180,13 @@ export function parseEnumOptions(enumOptions: string | null): EnumOption[] {
     })
 }
 
-export function buildInitialFieldValues(fields: ReservationTaskFieldResult[], payload: ReservationRecord | null): ReservationRecord {
+export function buildInitialFieldValues(
+  fields: ReservationTaskFieldResult[],
+  payload: ReservationRecord | null,
+  fieldContractVersion?: string | null,
+): ReservationRecord {
   return fields.reduce<ReservationRecord>((values, field) => {
-    values[field.field_path] = payload?.[field.field_path] ?? field.value ?? ''
+    values[field.field_path] = readReservationFieldValue(field, payload ?? {}, fieldContractVersion)
     return values
   }, {})
 }
@@ -185,7 +203,7 @@ export function buildEditableFieldValues(
     .filter((field) => isReservationFieldActive(field, values))
     .filter((field) => isReservationFieldEditable(field, readOnly))
     .reduce<ReservationRecord>((payload, field) => {
-      payload[field.field_path] = field.field_path in values ? values[field.field_path] : field.value ?? ''
+      payload[field.field_path] = readReservationFieldValue(field, values)
       return payload
     }, {})
 }
@@ -195,13 +213,14 @@ export function validateReservationFieldValues(
   values: ReservationRecord,
 ): ReservationFieldValidationErrors {
   return fields.filter((field) => isReservationFieldActive(field, values)).reduce<ReservationFieldValidationErrors>((errors, field) => {
-    const value = values[field.field_path] ?? field.value ?? ''
-    if (isReservationFieldRequired(field) && isEmptyReservationValue(value)) {
+    const value = readReservationFieldValue(field, values)
+    const shouldValidateInput = isReservationFieldEditable(field, false)
+    if (shouldValidateInput && isReservationFieldRequired(field) && isEmptyReservationValue(value)) {
       errors[field.field_path] = createValidationError(field, 'required')
       return errors
     }
 
-    if (isEmptyReservationValue(value)) {
+    if (!shouldValidateInput || isEmptyReservationValue(value)) {
       return errors
     }
 
@@ -227,8 +246,9 @@ function valueForConditionPath(
   currentField: ReservationTaskFieldResult,
   fieldPath: string,
 ): unknown {
-  if (fieldPath in values) {
-    return values[fieldPath]
+  const value = readValueByFieldPath(values, fieldPath)
+  if (value !== undefined) {
+    return value
   }
   if (fieldPath === currentField.field_path) {
     return currentField.value
@@ -306,6 +326,121 @@ function isIsoLocalDate(value: string): boolean {
   return !Number.isNaN(date.getTime()) && date.toISOString().slice(0, 10) === value
 }
 
+export function readReservationFieldValue(
+  field: ReservationTaskFieldResult,
+  values: ReservationRecord,
+  fieldContractVersion?: string | null,
+): unknown {
+  const fieldValues = recordProperty(values, 'field_values') ?? values
+  const legacyValues = recordProperty(values, 'legacy_field_values')
+  const effectivePayload = recordProperty(values, 'effective_payload')
+  const legacyFieldPath = field.legacy_field_path ?? undefined
+  const codeV1 = normalizeContractVersion(fieldContractVersion) === 'CODE_V1'
+  const mainCandidates = fieldPathCandidates(field.field_path)
+  const legacyCandidates = legacyFieldPath ? fieldPathCandidates(legacyFieldPath) : []
+
+  if (codeV1) {
+    return firstDefined([
+      () => firstValueByPaths(legacyValues, legacyCandidates),
+      () => firstValueByPaths(fieldValues, legacyCandidates),
+      () => firstNestedValueByPaths(fieldValues, legacyCandidates),
+      () => firstValueByPaths(values, legacyCandidates),
+      () => firstNestedValueByPaths(effectivePayload, legacyCandidates),
+      () => firstValueByPaths(fieldValues, mainCandidates),
+      () => firstNestedValueByPaths(fieldValues, mainCandidates),
+      () => firstValueByPaths(values, mainCandidates),
+      () => firstNestedValueByPaths(effectivePayload, mainCandidates),
+      () => field.value,
+      () => '',
+    ])
+  }
+
+  return firstDefined([
+    () => firstValueByPaths(fieldValues, mainCandidates),
+    () => firstNestedValueByPaths(fieldValues, mainCandidates),
+    () => firstValueByPaths(values, mainCandidates),
+    () => firstNestedValueByPaths(effectivePayload, mainCandidates),
+    () => firstValueByPaths(legacyValues, legacyCandidates),
+    () => firstValueByPaths(fieldValues, legacyCandidates),
+    () => firstNestedValueByPaths(fieldValues, legacyCandidates),
+    () => firstValueByPaths(values, legacyCandidates),
+    () => field.value,
+    () => '',
+  ])
+}
+
+function readValueByFieldPath(values: ReservationRecord, fieldPath: string): unknown {
+  const flatValue = firstValueByPaths(values, fieldPathCandidates(fieldPath))
+  if (flatValue !== undefined) {
+    return flatValue
+  }
+  return readNestedPath(values, fieldPath)
+}
+
+function fieldPathCandidates(fieldPath: string): string[] {
+  return [fieldPath, ...(roomItemFieldPathAliases[fieldPath] ?? [])]
+}
+
+function firstValueByPaths(values: ReservationRecord | undefined, fieldPaths: string[]): unknown {
+  if (!values) {
+    return undefined
+  }
+  for (const fieldPath of fieldPaths) {
+    if (Object.prototype.hasOwnProperty.call(values, fieldPath)) {
+      return values[fieldPath]
+    }
+  }
+  return undefined
+}
+
+function firstNestedValueByPaths(values: ReservationRecord | undefined, fieldPaths: string[]): unknown {
+  if (!values) {
+    return undefined
+  }
+  for (const fieldPath of fieldPaths) {
+    const value = readNestedPath(values, fieldPath)
+    if (value !== undefined) {
+      return value
+    }
+  }
+  return undefined
+}
+
+function readNestedPath(values: ReservationRecord, fieldPath: string): unknown {
+  return fieldPath.split('.').reduce<unknown>((current, segment) => {
+    if (current === null || current === undefined) {
+      return undefined
+    }
+    if (Array.isArray(current)) {
+      const index = Number(segment)
+      return Number.isInteger(index) ? current[index] : undefined
+    }
+    if (typeof current === 'object' && Object.prototype.hasOwnProperty.call(current, segment)) {
+      return (current as ReservationRecord)[segment]
+    }
+    return undefined
+  }, values)
+}
+
+function firstDefined(candidates: Array<() => unknown>): unknown {
+  for (const candidate of candidates) {
+    const value = candidate()
+    if (value !== undefined && value !== null) {
+      return value
+    }
+  }
+  return ''
+}
+
+function recordProperty(values: ReservationRecord, key: string): ReservationRecord | undefined {
+  const value = values[key]
+  return value && typeof value === 'object' && !Array.isArray(value) ? value as ReservationRecord : undefined
+}
+
+function normalizeContractVersion(version: string | null | undefined): string {
+  return version?.trim().replace(/[\s-]+/g, '_').toUpperCase() ?? ''
+}
+
 function isRuleTruthy(value: string | null): boolean {
   if (!value) {
     return false
diff --git a/docs/project/frontend-backend/frontend-to-backend-api-requests.md b/docs/project/frontend-backend/frontend-to-backend-api-requests.md
index 383692f..8527dbb 100644
--- a/docs/project/frontend-backend/frontend-to-backend-api-requests.md
+++ b/docs/project/frontend-backend/frontend-to-backend-api-requests.md
@@ -339,7 +339,7 @@ POST /api/system/reservation/demo-data
 - 任务列表已按 `result_type`、`route_code`、`system_process_category` 识别 `source_message_review_notification`、`adapter_contract_error`、`unhandled_current_intent` 只读诊断任务；S10/S99 和旧 S000/S999 都不展示订单入口。
 - 任务详情已展示 `result_type`、`ai_task_type`、`task_subtype`、`route_code`、`system_process_category`、`review_status`、来源邮件入口、`source_message_only_result`、`manual_review`、`adapter_contract_errors[]` 和 `unhandled_intents[]`。
 - type-known `result_type=manual_review` 已在原业务任务卡展示复核状态和缺失字段，并调用 `POST /api/reservation/tasks/{taskId}/manual-review-resolutions` 解阻，不再创建第二张人工复核任务卡。
-- 第一版解阻 UI 可提交 `/extracted_fields/pms_room_type_code` 和 `/extracted_fields/room_items/0/pms_room_type_code` 两类 pointer；后端也支持提交 P0 主 `field_path` 或旧扁平 `field_path`，提交成功后刷新任务详情和审计流水。
+- 第一版解阻 UI 已改为优先使用任务详情 `fields[].field_pointer`，并同时提交 P0 主 `fields[].field_path`；旧扁平 `legacy_field_path` / `legacy_field_values` 仅用于 `field_contract_version=code-v1` 历史任务过渡回显，不作为新前端主动提交路径。
 - 前端只读规则已收口：S10/S99、适配契约异常、未处理意图、前置任务阻塞和同卡人工复核待解阻状态都不显示保存草稿、确认任务、人工转换或 OPERA 执行 / 重试入口。
 - 前端 fixture 已补 V3 最小结构样例：`source_message` 完整对象、`message_events[]` 的 `event_role`、`current_or_history`、`source_event_index`、四字段 `case_keys`、`relevant_message_excerpt`、`attachments`、`file_references`、`context_used`、`extracted_fields`、`manual_review`。