feat(M04-C): 完成续费换房与订单调整

backend/package.json

@@ -17,7 +17,7 @@
     "db:migrate:verify": "npm run build && node dist/db/migrate-cli.js verify",
     "db:migrate:down": "npm run build && node dist/db/migrate-cli.js down",
     "test:mysql:migration": "npm run build && node tests/mysql-migration-roundtrip.test.mjs",
-    "test": "npm run build && node tests/backend-contract.test.mjs && node tests/migration-contract.test.mjs && node tests/mysql-pool-contract.test.mjs && node tests/migration-runner.test.mjs && node tests/legacy-money.test.mjs && node tests/legacy-read-repository.test.mjs && node tests/task-repository.test.mjs && node tests/platform-config-repository.test.mjs && node tests/auth.test.mjs && node tests/rbac.test.mjs && node tests/user-management.test.mjs && node tests/store-room.test.mjs && node tests/content-management.test.mjs && node tests/store-discovery.test.mjs && node tests/store-access.test.mjs && node tests/pricing.test.mjs && node tests/order-state.test.mjs"
+    "test": "npm run build && node tests/backend-contract.test.mjs && node tests/migration-contract.test.mjs && node tests/mysql-pool-contract.test.mjs && node tests/migration-runner.test.mjs && node tests/legacy-money.test.mjs && node tests/legacy-read-repository.test.mjs && node tests/task-repository.test.mjs && node tests/platform-config-repository.test.mjs && node tests/auth.test.mjs && node tests/rbac.test.mjs && node tests/user-management.test.mjs && node tests/store-room.test.mjs && node tests/content-management.test.mjs && node tests/store-discovery.test.mjs && node tests/store-access.test.mjs && node tests/pricing.test.mjs && node tests/order-state.test.mjs && node tests/order-management.test.mjs"
   },
   "dependencies": {
     "@fastify/cors": "^11.2.0",

backend/src/app.ts

@@ -33,6 +33,9 @@ import { registerPricingRoutes, type PricingRouteOptions } from './routes/pricin
 import {
   registerOrderStateRoutes, type OrderStateRouteOptions
 } from './routes/order-state.js';
+import {
+  registerOrderManagementRoutes, type OrderManagementRouteOptions
+} from './routes/order-management.js';
 
 export interface BuildAppOptions {
   config?: AppConfig;
@@ -45,6 +48,7 @@ export interface BuildAppOptions {
   storeAccess?: StoreAccessRouteOptions;
   pricing?: PricingRouteOptions;
   orderState?: OrderStateRouteOptions;
+  orderManagement?: OrderManagementRouteOptions;
 }
 
 declare module 'fastify' {
@@ -114,6 +118,9 @@ export async function buildApp(options: BuildAppOptions = {}): Promise<FastifyIn
   if (options.orderState) {
     await registerOrderStateRoutes(app, options.orderState);
   }
+  if (options.orderManagement) {
+    await registerOrderManagementRoutes(app, options.orderManagement);
+  }
 
   return app;
 }

backend/src/db/migration-runner.ts

@@ -32,7 +32,8 @@ const migrationFiles: Record<MigrationDirection, readonly string[]> = {
     'database/migrations/2026061809_m03c_store_discovery.up.sql',
     'database/migrations/2026061810_m03d_scene_wifi_access.up.sql',
     'database/migrations/2026061811_m04a_pricing_reservations.up.sql',
-    'database/migrations/2026062012_m04b_order_state_machine.up.sql'
+    'database/migrations/2026062012_m04b_order_state_machine.up.sql',
+    'database/migrations/2026062013_m04c_order_adjustments.up.sql'
   ],
   verify: [
     'database/migrations/2026061601_m01b_core_schema.verify.sql',
@@ -46,9 +47,11 @@ const migrationFiles: Record<MigrationDirection, readonly string[]> = {
     'database/migrations/2026061809_m03c_store_discovery.verify.sql',
     'database/migrations/2026061810_m03d_scene_wifi_access.verify.sql',
     'database/migrations/2026061811_m04a_pricing_reservations.verify.sql',
-    'database/migrations/2026062012_m04b_order_state_machine.verify.sql'
+    'database/migrations/2026062012_m04b_order_state_machine.verify.sql',
+    'database/migrations/2026062013_m04c_order_adjustments.verify.sql'
   ],
   down: [
+    'database/migrations/2026062013_m04c_order_adjustments.down.sql',
     'database/migrations/2026062012_m04b_order_state_machine.down.sql',
     'database/migrations/2026061811_m04a_pricing_reservations.down.sql',
     'database/migrations/2026061810_m03d_scene_wifi_access.down.sql',
@@ -188,7 +191,8 @@ export async function executeMigrationPlan(
         2, 2, 1,
         3, 3, 1,
         2, 1, 3, 3, 1,
-        2, 1, 3, 1
+        2, 1, 3, 1,
+        2, 2, 1, 2, 1
       ][index] ?? 1;
       if (!Array.isArray(result) || result.length < minimumRows) {
         throw new Error(

backend/src/orders/order-management-repository.ts

@@ -0,0 +1,376 @@
+import type { PoolConnection, ResultSetHeader, RowDataPacket } from 'mysql2/promise';
+import type { AccessProfile } from '../auth/rbac-repository.js';
+import type { MySqlPool } from '../db/mysql.js';
+import type { OrderActor } from './order-state-repository.js';
+
+type PricingPolicy = 'CURRENT' | 'LOCKED';
+type AdjustableStatus = 'PENDING_PAYMENT' | 'PAID' | 'RESERVED' | 'IN_PROGRESS';
+
+interface OrderRow extends RowDataPacket {
+  id: string;
+  storeId: string;
+  roomId: string;
+  status: AdjustableStatus;
+  startAt: Date;
+  endAt: Date;
+  totalAmountCents: number;
+  adjustmentAmountCents: number;
+  cancellationCutoffMinutes: number;
+  cancellationFeeBps: number;
+}
+interface RoomRow extends RowDataPacket {
+  id: string;
+  storeId: string;
+  basePriceCents: number;
+  weekdayPriceCents: number;
+  holidayPriceCents: number;
+  timezone: string;
+  operationalStatus: string;
+  configurationStatus: string;
+}
+interface SnapshotRow extends RowDataPacket { unitPriceCents: number }
+interface DuplicateRow extends RowDataPacket {
+  id: string;
+  adjustmentType: string;
+  amountDeltaCents: number;
+}
+
+export class OrderManagementError extends Error {
+  constructor(public readonly code: string) { super(code); }
+}
+
+export class OrderManagementRepository {
+  constructor(private readonly pool: MySqlPool) {}
+
+  async renew(actor: OrderActor, orderId: string, input: {
+    endAt: Date; pricingPolicy: PricingPolicy; reason: string;
+  }) {
+    return this.transaction(async (connection) => {
+      const order = await this.loadOrder(connection, actor.tenantId, orderId);
+      this.assertManager(actor.access, order.storeId);
+      const duplicate = await this.duplicate(connection, actor, orderId);
+      if (duplicate) return this.duplicateResult(orderId, duplicate);
+      if (!['PAID', 'RESERVED', 'IN_PROGRESS'].includes(order.status)) {
+        throw new OrderManagementError('ORDER_RENEW_STATUS_INVALID');
+      }
+      if (input.endAt <= order.endAt) throw new OrderManagementError('ORDER_RENEW_END_INVALID');
+      await this.lockRooms(connection, actor.tenantId, [order.roomId]);
+      await this.assertAvailable(
+        connection, actor.tenantId, order.roomId, order.endAt, input.endAt, orderId
+      );
+      const unitPrice = await this.resolveUnitPrice(
+        connection, actor.tenantId, order, input.pricingPolicy
+      );
+      const amountDeltaCents = Math.ceil(
+        (input.endAt.getTime() - order.endAt.getTime()) / 3600000
+      ) * unitPrice;
+      await connection.execute(
+        `UPDATE qipai_orders
+         SET end_at = ?, total_amount_cents = total_amount_cents + ?,
+             adjustment_amount_cents = adjustment_amount_cents + ?
+         WHERE tenant_id = ? AND id = ?`,
+        [input.endAt, amountDeltaCents, amountDeltaCents, actor.tenantId, orderId]
+      );
+      await connection.execute(
+        `UPDATE qipai_room_reservations
+         SET ends_at = ?, expires_at = GREATEST(expires_at, ?)
+         WHERE tenant_id = ? AND order_id = ?`,
+        [input.endAt, input.endAt, actor.tenantId, orderId]
+      );
+      return this.record(connection, actor, order, 'RENEW', input.reason, {
+        endAt: order.endAt
+      }, { endAt: input.endAt, pricingPolicy: input.pricingPolicy }, amountDeltaCents);
+    });
+  }
+
+  async changeRoom(actor: OrderActor, orderId: string, input: {
+    roomId: string; reason: string;
+  }) {
+    return this.transaction(async (connection) => {
+      const order = await this.loadOrder(connection, actor.tenantId, orderId);
+      this.assertManager(actor.access, order.storeId);
+      const duplicate = await this.duplicate(connection, actor, orderId);
+      if (duplicate) return this.duplicateResult(orderId, duplicate);
+      if (!['PENDING_PAYMENT', 'PAID', 'RESERVED', 'IN_PROGRESS'].includes(order.status)) {
+        throw new OrderManagementError('ORDER_ROOM_CHANGE_STATUS_INVALID');
+      }
+      if (input.roomId === order.roomId) throw new OrderManagementError('ORDER_ROOM_UNCHANGED');
+      await this.lockRooms(connection, actor.tenantId, [order.roomId, input.roomId]);
+      const target = await this.loadRoom(connection, actor.tenantId, input.roomId);
+      this.assertManager(actor.access, target.storeId);
+      await this.assertAvailable(
+        connection, actor.tenantId, target.id, order.startAt, order.endAt, orderId
+      );
+      const oldRoom = await this.loadRoom(connection, actor.tenantId, order.roomId);
+      const hours = Math.ceil((order.endAt.getTime() - order.startAt.getTime()) / 3600000);
+      const amountDeltaCents = hours * (target.basePriceCents - oldRoom.basePriceCents);
+      await connection.execute(
+        `UPDATE qipai_orders
+         SET store_id = ?, room_id = ?,
+             total_amount_cents = GREATEST(0, total_amount_cents + ?),
+             adjustment_amount_cents = adjustment_amount_cents + ?
+         WHERE tenant_id = ? AND id = ?`,
+        [target.storeId, target.id, amountDeltaCents, amountDeltaCents,
+          actor.tenantId, orderId]
+      );
+      await connection.execute(
+        `UPDATE qipai_room_reservations SET room_id = ?
+         WHERE tenant_id = ? AND order_id = ?`,
+        [target.id, actor.tenantId, orderId]
+      );
+      return this.record(connection, actor, order, 'CHANGE_ROOM', input.reason, {
+        storeId: order.storeId, roomId: order.roomId
+      }, { storeId: target.storeId, roomId: target.id }, amountDeltaCents);
+    });
+  }
+
+  async adjustTime(actor: OrderActor, orderId: string, input: {
+    startAt?: Date; endAt?: Date; reason: string;
+  }) {
+    return this.transaction(async (connection) => {
+      const order = await this.loadOrder(connection, actor.tenantId, orderId);
+      this.assertManager(actor.access, order.storeId);
+      const duplicate = await this.duplicate(connection, actor, orderId);
+      if (duplicate) return this.duplicateResult(orderId, duplicate);
+      const startAt = input.startAt ?? order.startAt;
+      const endAt = input.endAt ?? order.endAt;
+      if (endAt <= startAt) throw new OrderManagementError('ORDER_TIME_WINDOW_INVALID');
+      await this.lockRooms(connection, actor.tenantId, [order.roomId]);
+      await this.assertAvailable(
+        connection, actor.tenantId, order.roomId, startAt, endAt, orderId
+      );
+      const oldHours = Math.ceil((order.endAt.getTime() - order.startAt.getTime()) / 3600000);
+      const newHours = Math.ceil((endAt.getTime() - startAt.getTime()) / 3600000);
+      const unitPrice = await this.resolveUnitPrice(connection, actor.tenantId, order, 'LOCKED');
+      const amountDeltaCents = (newHours - oldHours) * unitPrice;
+      await connection.execute(
+        `UPDATE qipai_orders SET start_at = ?, end_at = ?,
+           total_amount_cents = GREATEST(0, total_amount_cents + ?),
+           adjustment_amount_cents = adjustment_amount_cents + ?
+         WHERE tenant_id = ? AND id = ?`,
+        [startAt, endAt, amountDeltaCents, amountDeltaCents, actor.tenantId, orderId]
+      );
+      await connection.execute(
+        `UPDATE qipai_room_reservations SET starts_at = ?, ends_at = ?,
+           expires_at = GREATEST(expires_at, ?)
+         WHERE tenant_id = ? AND order_id = ?`,
+        [startAt, endAt, endAt, actor.tenantId, orderId]
+      );
+      return this.record(connection, actor, order, 'ADJUST_TIME', input.reason, {
+        startAt: order.startAt, endAt: order.endAt
+      }, { startAt, endAt }, amountDeltaCents);
+    });
+  }
+
+  async note(actor: OrderActor, orderId: string, note: string) {
+    return this.transaction(async (connection) => {
+      const order = await this.loadOrder(connection, actor.tenantId, orderId);
+      this.assertManager(actor.access, order.storeId);
+      const duplicate = await this.duplicate(connection, actor, orderId);
+      if (duplicate) return this.duplicateResult(orderId, duplicate);
+      await connection.execute(
+        `UPDATE qipai_orders SET operator_note = ? WHERE tenant_id = ? AND id = ?`,
+        [note.slice(0, 512), actor.tenantId, orderId]
+      );
+      return this.record(connection, actor, order, 'NOTE', note, {}, { note }, 0);
+    });
+  }
+
+  async cancellationQuote(tenantId: string, userId: string, orderId: string) {
+    return this.transaction(async (connection) => {
+      const order = await this.loadOrder(connection, tenantId, orderId);
+      await this.assertOwner(connection, tenantId, orderId, userId);
+      const minutesBeforeStart = Math.floor((order.startAt.getTime() - Date.now()) / 60000);
+      const feeCents = minutesBeforeStart >= order.cancellationCutoffMinutes
+        ? 0 : Math.ceil(order.totalAmountCents * order.cancellationFeeBps / 10000);
+      return {
+        orderId,
+        allowed: order.status !== 'IN_PROGRESS',
+        cutoffMinutes: order.cancellationCutoffMinutes,
+        feeCents,
+        refundableCents: Math.max(0, order.totalAmountCents - feeCents)
+      };
+    });
+  }
+
+  private async record(
+    connection: PoolConnection, actor: OrderActor, order: OrderRow,
+    type: string, reason: string, before: object, after: object, amountDeltaCents: number
+  ) {
+    const [result] = await connection.execute<ResultSetHeader>(
+      `INSERT INTO qipai_order_adjustments
+        (tenant_id, order_id, adjustment_type, actor_id, source, trace_id,
+         reason, before_values, after_values, amount_delta_cents)
+       VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+      [actor.tenantId, order.id, type, actor.userId, actor.source, actor.traceId,
+        reason.slice(0, 512), JSON.stringify(before), JSON.stringify(after), amountDeltaCents]
+    );
+    await connection.execute(
+      `INSERT INTO qipai_audit_logs
+        (tenant_id, actor_type, actor_id, action, resource_type, resource_id,
+         trace_id, ip, user_agent, metadata)
+       VALUES (?, 'USER', ?, 'ORDER_MANUALLY_ADJUSTED', 'ORDER', ?, ?, ?, ?,
+         JSON_OBJECT('adjustmentType', ?, 'amountDeltaCents', ?))`,
+      [actor.tenantId, actor.userId, order.id, actor.traceId, actor.ip,
+        actor.userAgent.slice(0, 255), type, amountDeltaCents]
+    );
+    return {
+      orderId: order.id, adjustmentId: String(result.insertId),
+      adjustmentType: type, amountDeltaCents, idempotent: false
+    };
+  }
+
+  private async loadOrder(connection: PoolConnection, tenantId: string, orderId: string) {
+    const [rows] = await connection.execute<OrderRow[]>(
+      `SELECT o.id, o.store_id AS storeId, o.room_id AS roomId, o.status,
+              o.start_at AS startAt, o.end_at AS endAt,
+              o.total_amount_cents AS totalAmountCents,
+              o.adjustment_amount_cents AS adjustmentAmountCents,
+              s.cancellation_cutoff_minutes AS cancellationCutoffMinutes,
+              s.cancellation_fee_bps AS cancellationFeeBps
+       FROM qipai_orders o
+       INNER JOIN qipai_stores s ON s.tenant_id = o.tenant_id AND s.id = o.store_id
+       WHERE o.tenant_id = ? AND o.id = ? AND o.deleted_at IS NULL FOR UPDATE`,
+      [tenantId, orderId]
+    );
+    if (!rows[0]) throw new OrderManagementError('ORDER_NOT_FOUND');
+    return rows[0];
+  }
+
+  private async loadRoom(connection: PoolConnection, tenantId: string, roomId: string) {
+    const [rows] = await connection.execute<RoomRow[]>(
+      `SELECT r.id, r.store_id AS storeId, r.base_price_cents AS basePriceCents,
+              r.weekday_price_cents AS weekdayPriceCents,
+              r.holiday_price_cents AS holidayPriceCents,
+              r.operational_status AS operationalStatus,
+              r.configuration_status AS configurationStatus, s.timezone
+       FROM qipai_rooms r
+       INNER JOIN qipai_stores s
+         ON s.tenant_id = r.tenant_id AND s.id = r.store_id AND s.deleted_at IS NULL
+       WHERE r.tenant_id = ? AND r.id = ? AND r.deleted_at IS NULL`,
+      [tenantId, roomId]
+    );
+    const room = rows[0];
+    if (!room) throw new OrderManagementError('ROOM_NOT_FOUND');
+    if (room.operationalStatus !== 'AVAILABLE' || room.configurationStatus !== 'ENABLED') {
+      throw new OrderManagementError('ROOM_NOT_AVAILABLE');
+    }
+    return room;
+  }
+
+  private async lockRooms(connection: PoolConnection, tenantId: string, roomIds: string[]) {
+    const sorted = [...new Set(roomIds)].sort((a, b) => Number(a) - Number(b));
+    for (const roomId of sorted) {
+      await connection.execute(
+        `SELECT id FROM qipai_rooms WHERE tenant_id = ? AND id = ? FOR UPDATE`,
+        [tenantId, roomId]
+      );
+    }
+  }
+
+  private async assertAvailable(
+    connection: PoolConnection, tenantId: string, roomId: string,
+    startAt: Date, endAt: Date, excludingOrderId: string
+  ) {
+    const [disabled] = await connection.execute<RowDataPacket[]>(
+      `SELECT id FROM qipai_room_disabled_periods
+       WHERE tenant_id = ? AND room_id = ? AND starts_at < ? AND ends_at > ? FOR UPDATE`,
+      [tenantId, roomId, endAt, startAt]
+    );
+    if (disabled[0]) throw new OrderManagementError('ROOM_DISABLED_PERIOD');
+    const [rows] = await connection.execute<RowDataPacket[]>(
+      `SELECT id FROM qipai_room_reservations
+       WHERE tenant_id = ? AND room_id = ? AND order_id <> ?
+         AND status IN ('HELD', 'CONSUMED')
+         AND (status = 'CONSUMED' OR expires_at > UTC_TIMESTAMP(3))
+         AND starts_at < ? AND ends_at > ? FOR UPDATE`,
+      [tenantId, roomId, excludingOrderId, endAt, startAt]
+    );
+    if (rows[0]) throw new OrderManagementError('TIME_SLOT_CONFLICT');
+  }
+
+  private async resolveUnitPrice(
+    connection: PoolConnection, tenantId: string, order: OrderRow, policy: PricingPolicy
+  ) {
+    if (policy === 'LOCKED') {
+      const [rows] = await connection.execute<SnapshotRow[]>(
+        `SELECT unit_price_cents AS unitPriceCents
+         FROM qipai_order_price_snapshots WHERE tenant_id = ? AND order_id = ?`,
+        [tenantId, order.id]
+      );
+      if (!rows[0]) throw new OrderManagementError('ORDER_PRICE_SNAPSHOT_MISSING');
+      return Number(rows[0].unitPriceCents);
+    }
+    const room = await this.loadRoom(connection, tenantId, order.roomId);
+    const localDate = new Intl.DateTimeFormat('en-CA', {
+      timeZone: room.timezone, year: 'numeric', month: '2-digit', day: '2-digit'
+    }).format(order.endAt);
+    const [holidayRows] = await connection.execute<RowDataPacket[]>(
+      `SELECT 1 FROM qipai_holiday_calendar
+       WHERE tenant_id = ? AND holiday_date = ? LIMIT 1`,
+      [tenantId, localDate]
+    );
+    if (holidayRows[0] && room.holidayPriceCents > 0) return Number(room.holidayPriceCents);
+    const weekdayName = new Intl.DateTimeFormat('en-US', {
+      timeZone: room.timezone, weekday: 'short'
+    }).format(order.endAt);
+    if (['Mon', 'Tue', 'Wed', 'Thu', 'Fri'].includes(weekdayName)
+      && room.weekdayPriceCents > 0) {
+      return Number(room.weekdayPriceCents);
+    }
+    return Number(room.basePriceCents);
+  }
+
+  private async duplicate(connection: PoolConnection, actor: OrderActor, orderId: string) {
+    const [rows] = await connection.execute<DuplicateRow[]>(
+      `SELECT id, adjustment_type AS adjustmentType,
+              amount_delta_cents AS amountDeltaCents
+       FROM qipai_order_adjustments
+       WHERE tenant_id = ? AND order_id = ? AND trace_id = ? LIMIT 1`,
+      [actor.tenantId, orderId, actor.traceId]
+    );
+    return rows[0] ?? null;
+  }
+
+  private duplicateResult(orderId: string, duplicate: DuplicateRow) {
+    return {
+      orderId, adjustmentId: String(duplicate.id),
+      adjustmentType: duplicate.adjustmentType,
+      amountDeltaCents: Number(duplicate.amountDeltaCents), idempotent: true
+    };
+  }
+
+  private assertManager(access: AccessProfile | undefined, storeId: string) {
+    if (!access || !(access.capabilities.includes('tenant.manage')
+      || access.roles.includes('PLATFORM_ADMIN')
+      || (access.capabilities.includes('store.operation.write') && access.storeIds.includes(storeId)))) {
+      throw new OrderManagementError('ORDER_MANAGEMENT_FORBIDDEN');
+    }
+  }
+
+  private async assertOwner(
+    connection: PoolConnection, tenantId: string, orderId: string, userId: string
+  ) {
+    const [rows] = await connection.execute<RowDataPacket[]>(
+      `SELECT 1 FROM qipai_order_user_access
+       WHERE tenant_id = ? AND order_id = ? AND user_id = ?`,
+      [tenantId, orderId, userId]
+    );
+    if (!rows[0]) throw new OrderManagementError('ORDER_ACCESS_FORBIDDEN');
+  }
+
+  private async transaction<T>(work: (connection: PoolConnection) => Promise<T>) {
+    const connection = await this.pool.getConnection();
+    try {
+      await connection.beginTransaction();
+      const result = await work(connection);
+      await connection.commit();
+      return result;
+    } catch (error) {
+      await connection.rollback();
+      throw error;
+    } finally {
+      connection.release();
+    }
+  }
+}

backend/src/orders/pricing-repository.ts

@@ -54,9 +54,13 @@ export class PricingRepository {
   async reserve(input: QuoteInput & {
     userId: string;
     holdMinutes?: number;
+    allowedStoreIds?: string[] | null;
   }) {
     return this.transaction(async (connection) => {
       const room = await this.loadRoom(connection, input.tenantId, input.roomId, true);
+      if (input.allowedStoreIds && !input.allowedStoreIds.includes(String(room.storeId))) {
+        throw new PricingError('STORE_SCOPE_FORBIDDEN');
+      }
       await this.releaseExpired(input.tenantId, input.roomId, connection);
       await this.assertAvailable(connection, input, true);
       const isHoliday = await this.isHoliday(
@@ -108,6 +112,7 @@ export class PricingRepository {
       return {
         orderId,
         orderNo,
+        storeId: String(room.storeId),
         reservationId: String(reservationResult.insertId),
         holdMinutes,
         quote

backend/src/routes/order-management.ts

@@ -0,0 +1,126 @@
+import type { FastifyInstance, FastifyReply } from 'fastify';
+import { z } from 'zod';
+import type { AuthRepository } from '../auth/auth-repository.js';
+import { authenticateAccessToken } from '../auth/authenticate.js';
+import type { AccessProfile } from '../auth/rbac-repository.js';
+import {
+  OrderManagementError, type OrderManagementRepository
+} from '../orders/order-management-repository.js';
+import type { OrderActor } from '../orders/order-state-repository.js';
+
+const paramsSchema = z.object({ orderId: z.string().regex(/^[1-9]\d{0,19}$/) });
+const renewSchema = z.object({
+  endAt: z.coerce.date(),
+  pricingPolicy: z.enum(['CURRENT', 'LOCKED']).default('CURRENT'),
+  reason: z.string().min(1).max(512)
+}).strict();
+const roomSchema = z.object({
+  roomId: z.string().regex(/^[1-9]\d{0,19}$/),
+  reason: z.string().min(1).max(512)
+}).strict();
+const timeSchema = z.object({
+  startAt: z.coerce.date().optional(),
+  endAt: z.coerce.date().optional(),
+  reason: z.string().min(1).max(512)
+}).strict().refine((value) => value.startAt || value.endAt);
+const noteSchema = z.object({ note: z.string().min(1).max(512) }).strict();
+
+export interface OrderManagementRouteOptions {
+  repository: Pick<OrderManagementRepository,
+    'renew' | 'changeRoom' | 'adjustTime' | 'note' | 'cancellationQuote'>;
+  authRepository: Pick<AuthRepository, 'validateSession'>;
+  accessControl: { getAccessProfile(tenantId: string, userId: string): Promise<AccessProfile> };
+  jwtSecret: string;
+}
+
+export async function registerOrderManagementRoutes(
+  app: FastifyInstance, options: OrderManagementRouteOptions
+) {
+  app.get('/app-api/orders/:orderId/cancellation-quote', async (request, reply) => {
+    const auth = await authenticate(request.headers.authorization, options);
+    const params = paramsSchema.safeParse(request.params);
+    if (!auth) return unauthorized(reply, request.traceId);
+    if (!params.success) return invalid(reply, request.traceId);
+    return handle(reply, request.traceId, async () => ({
+      code: 0,
+      data: await options.repository.cancellationQuote(
+        auth.tenantId, auth.userId, params.data.orderId
+      ),
+      traceId: request.traceId
+    }));
+  });
+
+  const adminActions = [
+    ['renew', renewSchema, (actor: OrderActor, orderId: string, body: z.infer<typeof renewSchema>) =>
+      options.repository.renew(actor, orderId, body)],
+    ['change-room', roomSchema, (actor: OrderActor, orderId: string, body: z.infer<typeof roomSchema>) =>
+      options.repository.changeRoom(actor, orderId, body)],
+    ['adjust-time', timeSchema, (actor: OrderActor, orderId: string, body: z.infer<typeof timeSchema>) =>
+      options.repository.adjustTime(actor, orderId, body)],
+    ['note', noteSchema, (actor: OrderActor, orderId: string, body: z.infer<typeof noteSchema>) =>
+      options.repository.note(actor, orderId, body.note)]
+  ] as const;
+
+  for (const [path, schema, execute] of adminActions) {
+    app.post(`/admin-api/orders/:orderId/${path}`, async (request, reply) => {
+      const auth = await authenticate(request.headers.authorization, options);
+      const params = paramsSchema.safeParse(request.params);
+      const body = schema.safeParse(request.body);
+      if (!auth) return unauthorized(reply, request.traceId);
+      if (!params.success || !body.success) return invalid(reply, request.traceId);
+      const actor = {
+        tenantId: auth.tenantId, userId: auth.userId, actorType: 'USER' as const,
+        source: 'ADMIN' as const, traceId: request.traceId, ip: request.ip,
+        userAgent: request.headers['user-agent'] ?? '', access: auth.access
+      };
+      return handle(reply, request.traceId, async () => ({
+        code: 0,
+        data: await execute(actor, params.data.orderId, body.data as never),
+        traceId: request.traceId
+      }));
+    });
+  }
+}
+
+async function authenticate(
+  authorization: string | undefined, options: OrderManagementRouteOptions
+) {
+  const result = await authenticateAccessToken(
+    authorization, options.authRepository, options.jwtSecret
+  );
+  if (!result) return null;
+  const tenantId = result.session.tenantId;
+  const userId = result.session.user.id;
+  return {
+    tenantId, userId,
+    access: await options.accessControl.getAccessProfile(tenantId, userId)
+  };
+}
+
+async function handle(reply: FastifyReply, traceId: string, work: () => Promise<unknown>) {
+  try {
+    return await work();
+  } catch (error) {
+    if (!(error instanceof OrderManagementError)) throw error;
+    const status = error.code === 'ORDER_NOT_FOUND' || error.code === 'ROOM_NOT_FOUND' ? 404
+      : error.code === 'TIME_SLOT_CONFLICT' ? 409
+        : error.code.includes('FORBIDDEN') ? 403 : 400;
+    return reply.status(status).send({
+      code: error.code,
+      message: 'The requested order adjustment is not available.',
+      traceId
+    });
+  }
+}
+
+function unauthorized(reply: FastifyReply, traceId: string) {
+  return reply.status(401).send({
+    code: 'AUTH_SESSION_INVALID', message: 'Authentication required.', traceId
+  });
+}
+
+function invalid(reply: FastifyReply, traceId: string) {
+  return reply.status(400).send({
+    code: 'INVALID_ORDER_ADJUSTMENT', message: 'The order adjustment is invalid.', traceId
+  });
+}

backend/src/routes/order-state.ts

@@ -19,6 +19,9 @@ export interface OrderStateRouteOptions {
   authRepository: Pick<AuthRepository, 'validateSession'>;
   accessControl: { getAccessProfile(tenantId: string, userId: string): Promise<AccessProfile> };
   jwtSecret: string;
+  cancellationPolicy?: {
+    cancellationQuote(tenantId: string, userId: string, orderId: string): Promise<unknown>;
+  };
 }
 
 export async function registerOrderStateRoutes(
@@ -44,15 +47,19 @@ export async function registerOrderStateRoutes(
     const body = cancelSchema.safeParse(request.body ?? {});
     if (!auth) return unauthorized(reply, request.traceId);
     if (!params.success || !body.success) return invalid(reply, request.traceId);
-    return handle(reply, request.traceId, async () => ({
+    return handle(reply, request.traceId, async () => {
-      code: 0,
+      const cancellation = options.cancellationPolicy
-      data: await options.repository.transition({
+        ? await options.cancellationPolicy.cancellationQuote(
+          auth.tenantId, auth.userId, params.data.orderId
+        )
+        : null;
+      const transition = await options.repository.transition({
         tenantId: auth.tenantId, userId: auth.userId, actorType: 'USER',
         source: 'APP', traceId: request.traceId, ip: request.ip,
         userAgent: request.headers['user-agent'] ?? '', access: auth.access
-      }, params.data.orderId, 'CANCEL', body.data.reason),
+      }, params.data.orderId, 'CANCEL', body.data.reason);
-      traceId: request.traceId
+      return { code: 0, data: { transition, cancellation }, traceId: request.traceId };
-    }));
+    });
   });
 
   app.post('/admin-api/orders/:orderId/actions', async (request, reply) => {

backend/src/routes/pricing.ts

@@ -11,6 +11,9 @@ const requestSchema = z.object({
   endAt: z.coerce.date(),
   pricingMode: z.enum(['HOURLY', 'OVERNIGHT', 'FULL_DAY']).default('HOURLY')
 }).refine((value) => value.endAt > value.startAt);
+const adminReserveSchema = requestSchema.and(z.object({
+  userId: z.string().regex(/^[1-9]\d{0,19}$/)
+}));
 
 export interface PricingRouteOptions {
   repository: Pick<PricingRepository, 'quote' | 'reserve' | 'releaseExpired'>;
@@ -69,6 +72,36 @@ export async function registerPricingRoutes(app: FastifyInstance, options: Prici
       traceId: request.traceId
     };
   });
+
+  app.post('/admin-api/orders/reserve-on-behalf', async (request, reply) => {
+    const auth = await authenticate(request.headers.authorization, options);
+    const body = adminReserveSchema.safeParse(request.body);
+    if (!auth) return unauthorized(reply, request.traceId);
+    if (!body.success) return invalid(reply, request.traceId);
+    const access = await options.accessControl.getAccessProfile(auth.tenantId, auth.userId);
+    const unrestricted = access.capabilities.includes('tenant.manage')
+      || access.roles.includes('PLATFORM_ADMIN');
+    if (!unrestricted && !access.capabilities.includes('store.operation.write')) {
+      return reply.status(403).send({
+        code: 'ORDER_MANAGEMENT_FORBIDDEN',
+        message: 'Order management permission is required.',
+        traceId: request.traceId
+      });
+    }
+    return handle(reply, request.traceId, async () => reply.status(201).send({
+      code: 0,
+      data: await options.repository.reserve({
+        tenantId: auth.tenantId,
+        userId: body.data.userId,
+        roomId: body.data.roomId,
+        startAt: body.data.startAt,
+        endAt: body.data.endAt,
+        pricingMode: body.data.pricingMode,
+        allowedStoreIds: unrestricted ? null : access.storeIds
+      }),
+      traceId: request.traceId
+    }));
+  });
 }
 
 async function authenticate(

backend/src/server.ts

@@ -14,11 +14,13 @@ import { StoreDiscoveryRepository } from './stores/store-discovery-repository.js
 import { StoreAccessRepository } from './stores/access-repository.js';
 import { PricingRepository } from './orders/pricing-repository.js';
 import { OrderStateRepository } from './orders/order-state-repository.js';
+import { OrderManagementRepository } from './orders/order-management-repository.js';
 
 const config = loadConfig();
 const pool = createMySqlPool(config);
 const authRepository = new AuthRepository(pool);
 const accessControl = new RbacRepository(pool);
+const orderManagementRepository = new OrderManagementRepository(pool);
 const app = await buildApp({
   config,
   platformConfigRepository: new PlatformConfigRepository(pool),
@@ -69,6 +71,13 @@ const app = await buildApp({
     repository: new OrderStateRepository(pool),
     authRepository,
     accessControl,
+    jwtSecret: config.auth.jwtSecret,
+    cancellationPolicy: orderManagementRepository
+  },
+  orderManagement: {
+    repository: orderManagementRepository,
+    authRepository,
+    accessControl,
     jwtSecret: config.auth.jwtSecret
   }
 });

backend/tests/migration-contract.test.mjs

@@ -45,6 +45,9 @@ const pricingVerifySql = read('database/migrations/2026061811_m04a_pricing_reser
 const orderStateUpSql = read('database/migrations/2026062012_m04b_order_state_machine.up.sql');
 const orderStateDownSql = read('database/migrations/2026062012_m04b_order_state_machine.down.sql');
 const orderStateVerifySql = read('database/migrations/2026062012_m04b_order_state_machine.verify.sql');
+const adjustmentUpSql = read('database/migrations/2026062013_m04c_order_adjustments.up.sql');
+const adjustmentDownSql = read('database/migrations/2026062013_m04c_order_adjustments.down.sql');
+const adjustmentVerifySql = read('database/migrations/2026062013_m04c_order_adjustments.verify.sql');
 
 const coreTables = [
   'qipai_schema_migrations',
@@ -207,5 +210,11 @@ assert.match(orderStateUpSql, /UNIQUE KEY uq_qipai_order_history_trace/);
 assert.match(orderStateUpSql, /actor_type VARCHAR/);
 assert.match(orderStateUpSql, /source VARCHAR/);
 assert.match(orderStateUpSql, /trace_id VARCHAR/);
+assert.match(adjustmentUpSql, /CREATE TABLE IF NOT EXISTS qipai_order_adjustments/);
+assert.match(adjustmentDownSql, /DROP TABLE IF EXISTS qipai_order_adjustments/);
+assert.match(adjustmentVerifySql, /'qipai_order_adjustments'/);
+assert.match(adjustmentUpSql, /cancellation_cutoff_minutes/);
+assert.match(adjustmentUpSql, /amount_delta_cents INT/);
+assert.match(adjustmentUpSql, /UNIQUE KEY uq_qipai_order_adjustment_trace/);
 
-console.log('PASS: M01-B through M04-B migration contracts are present.');
+console.log('PASS: M01-B through M04-C migration contracts are present.');

backend/tests/migration-runner.test.mjs

@@ -23,7 +23,8 @@ assert.match(plan.file, /2026061808_m03b_decoration_ads_media\.up\.sql/);
 assert.match(plan.file, /2026061809_m03c_store_discovery\.up\.sql/);
 assert.match(plan.file, /2026061810_m03d_scene_wifi_access\.up\.sql/);
 assert.match(plan.file, /2026061811_m04a_pricing_reservations\.up\.sql/);
-assert.match(plan.file, /2026062012_m04b_order_state_machine\.up\.sql$/);
+assert.match(plan.file, /2026062012_m04b_order_state_machine\.up\.sql/);
+assert.match(plan.file, /2026062013_m04c_order_adjustments\.up\.sql$/);
 assert.match(plan.checksum, /^[a-f0-9]{64}$/);
 assert.ok(plan.statements.length >= 11);
 

backend/tests/mysql-migration-roundtrip.test.mjs

@@ -21,6 +21,9 @@ import { PricingRepository, PricingError } from '../dist/orders/pricing-reposito
 import {
   OrderStateError, OrderStateRepository
 } from '../dist/orders/order-state-repository.js';
+import {
+  OrderManagementError, OrderManagementRepository
+} from '../dist/orders/order-management-repository.js';
 import {
   executeMigrationPlan,
   loadMigrationPlan,
@@ -37,6 +40,7 @@ const expectedTables = [
   'qipai_legacy_table_mappings',
   'qipai_media_assets',
   'qipai_members',
+  'qipai_order_adjustments',
   'qipai_order_price_snapshots',
   'qipai_order_status_history',
   'qipai_order_user_access',
@@ -85,11 +89,11 @@ async function readMigrationVersions(pool) {
   const [rows] = await pool.query(
     `SELECT version, name
      FROM qipai_schema_migrations
-     WHERE version IN (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+     WHERE version IN (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
      ORDER BY version`,
     ['2026061601', '2026061802', '2026061803', '2026061804',
       '2026061805', '2026061806', '2026061807', '2026061808', '2026061809',
-      '2026061810', '2026061811', '2026062012']
+      '2026061810', '2026061811', '2026062012', '2026062013']
   );
   return rows;
 }
@@ -723,6 +727,169 @@ async function assertOrderStateMachine(pool, context) {
   ]);
 }
 
+async function assertOrderAdjustments(pool, context) {
+  const [adminRows] = await pool.query(
+    `SELECT u.id FROM qipai_users u
+     INNER JOIN qipai_user_roles ur ON ur.tenant_id = u.tenant_id AND ur.user_id = u.id
+     INNER JOIN qipai_roles r ON r.id = ur.role_id AND r.tenant_id = ur.tenant_id
+     WHERE u.tenant_id = ? AND r.code = 'TENANT_ADMIN' LIMIT 1`,
+    [context.tenantId]
+  );
+  const [customerRows] = await pool.query(
+    `SELECT u.id FROM qipai_users u
+     INNER JOIN qipai_user_identities i
+       ON i.tenant_id = u.tenant_id AND i.user_id = u.id
+     WHERE u.tenant_id = ? AND i.openid = 'm02b-openid-a' LIMIT 1`,
+    [context.tenantId]
+  );
+  const [targetRows] = await pool.query(
+    `SELECT s.id AS storeId, r.id AS roomId
+     FROM qipai_stores s
+     INNER JOIN qipai_rooms r ON r.tenant_id = s.tenant_id AND r.store_id = s.id
+     WHERE s.tenant_id = ? AND s.name = 'M03A Store' LIMIT 1`,
+    [context.tenantId]
+  );
+  const adminId = String(adminRows[0].id);
+  const customerId = String(customerRows[0].id);
+  const storeId = String(targetRows[0].storeId);
+  const roomId = String(targetRows[0].roomId);
+  const [newRoom] = await pool.query(
+    `INSERT INTO qipai_rooms
+      (tenant_id, store_id, name, room_no, base_price_cents,
+       configuration_status, operational_status, minimum_minutes, max_advance_days)
+     VALUES (?, ?, 'M04C Target Room', 'C02', 1800, 'ENABLED', 'AVAILABLE', 60, 30)`,
+    [context.tenantId, storeId]
+  );
+  const targetRoomId = String(newRoom.insertId);
+  await pool.query(
+    `UPDATE qipai_stores
+     SET cancellation_cutoff_minutes = 20160, cancellation_fee_bps = 2500
+     WHERE tenant_id = ? AND id = ?`,
+    [context.tenantId, storeId]
+  );
+  const startAt = new Date(Date.now() + 12 * 86400000);
+  startAt.setUTCHours(2, 0, 0, 0);
+  const endAt = new Date(startAt.getTime() + 2 * 3600000);
+  const pricing = new PricingRepository(pool);
+  const created = await pricing.reserve({
+    tenantId: context.tenantId, userId: customerId, roomId,
+    startAt, endAt, pricingMode: 'HOURLY'
+  });
+  const access = await new RbacRepository(pool).getAccessProfile(context.tenantId, adminId);
+  const state = new OrderStateRepository(pool);
+  await state.transition({
+    tenantId: context.tenantId, userId: adminId, actorType: 'USER',
+    source: 'ADMIN', traceId: 'm04c-order-paid', ip: '127.0.0.1',
+    userAgent: 'M04-C live test', access
+  }, created.orderId, 'CONFIRM_PAYMENT');
+  const repository = new OrderManagementRepository(pool);
+  const actor = (traceId) => ({
+    tenantId: context.tenantId, userId: adminId, actorType: 'USER',
+    source: 'ADMIN', traceId, ip: '127.0.0.1',
+    userAgent: 'M04-C live test', access
+  });
+
+  const blockedEnd = new Date(endAt.getTime() + 2 * 3600000);
+  const [blockingOrder] = await pool.query(
+    `INSERT INTO qipai_orders
+      (tenant_id, store_id, room_id, order_no, status, start_at, end_at)
+     VALUES (?, ?, ?, 'M04C-RENEW-BLOCK', 'PAID', ?, ?)`,
+    [context.tenantId, storeId, roomId, endAt, blockedEnd]
+  );
+  await pool.query(
+    `INSERT INTO qipai_room_reservations
+      (tenant_id, order_id, room_id, starts_at, ends_at, status, expires_at)
+     VALUES (?, ?, ?, ?, ?, 'CONSUMED', ?)`,
+    [context.tenantId, blockingOrder.insertId, roomId, endAt, blockedEnd, blockedEnd]
+  );
+  await assert.rejects(
+    () => repository.renew(actor('m04c-renew-conflict'), created.orderId, {
+      endAt: blockedEnd, pricingPolicy: 'LOCKED', reason: 'conflict rehearsal'
+    }),
+    (error) => error instanceof OrderManagementError && error.code === 'TIME_SLOT_CONFLICT'
+  );
+  const [unchanged] = await pool.query(
+    `SELECT end_at AS endAt FROM qipai_orders WHERE id = ?`,
+    [created.orderId]
+  );
+  assert.equal(new Date(unchanged[0].endAt).getTime(), endAt.getTime());
+  await pool.query(`DELETE FROM qipai_room_reservations WHERE order_id = ?`, [blockingOrder.insertId]);
+  await pool.query(`DELETE FROM qipai_orders WHERE id = ?`, [blockingOrder.insertId]);
+
+  const renewed = await repository.renew(actor('m04c-renew'), created.orderId, {
+    endAt: blockedEnd, pricingPolicy: 'LOCKED', reason: 'approved extension'
+  });
+  assert.equal(renewed.amountDeltaCents, created.quote.unitPriceCents * 2);
+  const duplicate = await repository.renew(actor('m04c-renew'), created.orderId, {
+    endAt: new Date(blockedEnd.getTime() + 3600000),
+    pricingPolicy: 'CURRENT', reason: 'duplicate request'
+  });
+  assert.equal(duplicate.idempotent, true);
+
+  const [targetBlockOrder] = await pool.query(
+    `INSERT INTO qipai_orders
+      (tenant_id, store_id, room_id, order_no, status, start_at, end_at)
+     VALUES (?, ?, ?, 'M04C-ROOM-BLOCK', 'PAID', ?, ?)`,
+    [context.tenantId, storeId, targetRoomId, startAt, blockedEnd]
+  );
+  await pool.query(
+    `INSERT INTO qipai_room_reservations
+      (tenant_id, order_id, room_id, starts_at, ends_at, status, expires_at)
+     VALUES (?, ?, ?, ?, ?, 'CONSUMED', ?)`,
+    [context.tenantId, targetBlockOrder.insertId, targetRoomId, startAt, blockedEnd, blockedEnd]
+  );
+  await assert.rejects(
+    () => repository.changeRoom(actor('m04c-room-conflict'), created.orderId, {
+      roomId: targetRoomId, reason: 'rollback rehearsal'
+    }),
+    (error) => error instanceof OrderManagementError && error.code === 'TIME_SLOT_CONFLICT'
+  );
+  const [stillOldRoom] = await pool.query(
+    `SELECT o.room_id AS orderRoomId, r.room_id AS reservationRoomId
+     FROM qipai_orders o INNER JOIN qipai_room_reservations r ON r.order_id = o.id
+     WHERE o.id = ?`,
+    [created.orderId]
+  );
+  assert.equal(String(stillOldRoom[0].orderRoomId), roomId);
+  assert.equal(String(stillOldRoom[0].reservationRoomId), roomId);
+  await pool.query(`DELETE FROM qipai_room_reservations WHERE order_id = ?`, [targetBlockOrder.insertId]);
+  await pool.query(`DELETE FROM qipai_orders WHERE id = ?`, [targetBlockOrder.insertId]);
+
+  const changed = await repository.changeRoom(actor('m04c-room-change'), created.orderId, {
+    roomId: targetRoomId, reason: 'customer requested target room'
+  });
+  assert.equal(changed.adjustmentType, 'CHANGE_ROOM');
+  const adjustedEnd = new Date(blockedEnd.getTime() + 3600000);
+  const adjusted = await repository.adjustTime(actor('m04c-time-adjust'), created.orderId, {
+    endAt: adjustedEnd, reason: 'manager granted one hour'
+  });
+  assert.equal(adjusted.adjustmentType, 'ADJUST_TIME');
+  await repository.note(actor('m04c-note'), created.orderId, 'sanitized operator note');
+  const cancellation = await repository.cancellationQuote(
+    context.tenantId, customerId, created.orderId
+  );
+  assert.equal(cancellation.allowed, true);
+  assert.ok(cancellation.feeCents > 0);
+  await assert.rejects(
+    () => pricing.reserve({
+      tenantId: context.tenantId, userId: customerId, roomId: targetRoomId,
+      startAt: new Date(adjustedEnd.getTime() + 86400000),
+      endAt: new Date(adjustedEnd.getTime() + 90000000),
+      pricingMode: 'HOURLY', allowedStoreIds: [String(Number(storeId) + 999)]
+    }),
+    (error) => error instanceof PricingError && error.code === 'STORE_SCOPE_FORBIDDEN'
+  );
+  const [history] = await pool.query(
+    `SELECT adjustment_type AS adjustmentType, amount_delta_cents AS amountDeltaCents
+     FROM qipai_order_adjustments
+     WHERE tenant_id = ? AND order_id = ? ORDER BY id`,
+    [context.tenantId, created.orderId]
+  );
+  assert.deepEqual(history.map((row) => row.adjustmentType), [
+    'RENEW', 'CHANGE_ROOM', 'ADJUST_TIME', 'NOTE'
+  ]);
+}
+
 async function assertContentManagement(pool, context) {
   const [adminRows] = await pool.query(
     `SELECT u.id FROM qipai_users u
@@ -822,7 +989,8 @@ try {
     { version: '2026061809', name: 'm03c_store_discovery' },
     { version: '2026061810', name: 'm03d_scene_wifi_access' },
     { version: '2026061811', name: 'm04a_pricing_reservations' },
-    { version: '2026062012', name: 'm04b_order_state_machine' }
+    { version: '2026062012', name: 'm04b_order_state_machine' },
+    { version: '2026062013', name: 'm04c_order_adjustments' }
   ]);
   await assertTaskDurability(pool);
   const loginContext = await assertPlatformTenantIsolation(pool);
@@ -834,13 +1002,14 @@ try {
   await assertSceneAndWifiAccess(pool, loginContext);
   await assertPricingAndReservations(pool, loginContext);
   await assertOrderStateMachine(pool, loginContext);
+  await assertOrderAdjustments(pool, loginContext);
   await assertLegacyCompatibility(pool);
   console.log('PASS: first up, verify, tenant isolation and revocable auth checks completed.');
 
   await executeMigrationPlan(pool, plans.down);
   assert.deepEqual(await readCoreTables(pool), []);
   await assertLegacyCompatibility(pool);
-  console.log('PASS: down removed all M01-B through M04-B tables.');
+  console.log('PASS: down removed all M01-B through M04-C tables.');
 
   await executeMigrationPlan(pool, plans.up);
   await executeMigrationPlan(pool, plans.verify);
@@ -857,7 +1026,8 @@ try {
     { version: '2026061809', name: 'm03c_store_discovery' },
     { version: '2026061810', name: 'm03d_scene_wifi_access' },
     { version: '2026061811', name: 'm04a_pricing_reservations' },
-    { version: '2026062012', name: 'm04b_order_state_machine' }
+    { version: '2026062012', name: 'm04b_order_state_machine' },
+    { version: '2026062013', name: 'm04c_order_adjustments' }
   ]);
   await assertLegacyCompatibility(pool);
   console.log('PASS: second up and verify restored the schema.');
@@ -919,7 +1089,13 @@ try {
       'controlled order actions',
       'idempotent transition trace',
       'complete order status history',
-      'reservation and access release on close'
+      'reservation and access release on close',
+      'renewal conflict leaves original end time unchanged',
+      'idempotent renewal adjustment',
+      'room-change conflict transaction rollback',
+      'room price difference and manager time adjustment',
+      'configured cancellation fee quote',
+      'store-scoped on-behalf booking rejection'
     ]
   }, null, 2));
 } finally {

backend/tests/order-management.test.mjs

@@ -0,0 +1,83 @@
+import assert from 'node:assert/strict';
+import { buildApp } from '../dist/app.js';
+import { signAccessToken } from '../dist/auth/jwt.js';
+
+const secret = 'test-only-order-management-secret-32-chars';
+const token = signAccessToken({
+  sub: '21', sid: '5c4d3af8-c63c-4edb-bf95-b84127bb3f6e',
+  tid: '7', aid: '9', rv: 1
+}, secret, 900);
+let called;
+const authRepository = {
+  async validateSession() {
+    return {
+      id: '5c4d3af8-c63c-4edb-bf95-b84127bb3f6e',
+      tenantId: '7', platformAppId: '9', expiresAt: new Date(Date.now() + 60000),
+      user: {
+        id: '21', tenantId: '7', userType: 'ADMIN', status: 'ACTIVE',
+        roleVersion: 1, nickname: '', avatarUrl: '', phone: ''
+      }
+    };
+  }
+};
+const accessControl = {
+  async getAccessProfile() {
+    return { roles: ['TENANT_ADMIN'], capabilities: ['tenant.manage'], storeIds: [] };
+  }
+};
+const app = await buildApp({
+  orderManagement: {
+    jwtSecret: secret, authRepository, accessControl,
+    repository: {
+      async renew(actor, orderId, body) {
+        called = { actor, orderId, body };
+        return { orderId, adjustmentType: 'RENEW', amountDeltaCents: 1200 };
+      },
+      async changeRoom() { throw new Error('not called'); },
+      async adjustTime() { throw new Error('not called'); },
+      async note() { throw new Error('not called'); },
+      async cancellationQuote() {
+        return { allowed: true, feeCents: 0, refundableCents: 3000 };
+      }
+    }
+  }
+});
+
+const rejectedAmount = await app.inject({
+  method: 'POST',
+  url: '/admin-api/orders/31/renew',
+  headers: { authorization: `Bearer ${token}` },
+  payload: {
+    endAt: new Date(Date.now() + 7200000).toISOString(),
+    pricingPolicy: 'LOCKED',
+    reason: 'extend',
+    amountDeltaCents: 1
+  }
+});
+assert.equal(rejectedAmount.statusCode, 400);
+
+const renewed = await app.inject({
+  method: 'POST',
+  url: '/admin-api/orders/31/renew',
+  headers: { authorization: `Bearer ${token}`, 'x-trace-id': 'm04c-renew-route' },
+  payload: {
+    endAt: new Date(Date.now() + 7200000).toISOString(),
+    pricingPolicy: 'LOCKED',
+    reason: 'customer requested extension'
+  }
+});
+assert.equal(renewed.statusCode, 200);
+assert.equal(called.orderId, '31');
+assert.equal(called.actor.traceId, 'm04c-renew-route');
+assert.equal(called.body.pricingPolicy, 'LOCKED');
+
+const quote = await app.inject({
+  method: 'GET',
+  url: '/app-api/orders/31/cancellation-quote',
+  headers: { authorization: `Bearer ${token}` }
+});
+assert.equal(quote.statusCode, 200);
+assert.equal(quote.json().data.refundableCents, 3000);
+
+await app.close();
+console.log('PASS: M04-C routes reject client amounts and expose controlled adjustments.');

database/migrations/2026062013_m04c_order_adjustments.down.sql

@@ -0,0 +1,8 @@
+DELETE FROM qipai_schema_migrations WHERE version = '2026062013';
+DROP TABLE IF EXISTS qipai_order_adjustments;
+ALTER TABLE qipai_orders
+  DROP COLUMN operator_note,
+  DROP COLUMN adjustment_amount_cents;
+ALTER TABLE qipai_stores
+  DROP COLUMN cancellation_fee_bps,
+  DROP COLUMN cancellation_cutoff_minutes;

database/migrations/2026062013_m04c_order_adjustments.up.sql

@@ -0,0 +1,35 @@
+ALTER TABLE qipai_stores
+  ADD COLUMN cancellation_cutoff_minutes INT UNSIGNED NOT NULL DEFAULT 120
+    AFTER notification_url,
+  ADD COLUMN cancellation_fee_bps SMALLINT UNSIGNED NOT NULL DEFAULT 0
+    AFTER cancellation_cutoff_minutes;
+
+ALTER TABLE qipai_orders
+  ADD COLUMN adjustment_amount_cents INT NOT NULL DEFAULT 0 AFTER paid_amount_cents,
+  ADD COLUMN operator_note VARCHAR(512) NOT NULL DEFAULT '' AFTER adjustment_amount_cents;
+
+CREATE TABLE IF NOT EXISTS qipai_order_adjustments (
+  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  tenant_id BIGINT UNSIGNED NOT NULL,
+  order_id BIGINT UNSIGNED NOT NULL,
+  adjustment_type VARCHAR(32) NOT NULL,
+  actor_id BIGINT UNSIGNED NOT NULL,
+  source VARCHAR(32) NOT NULL,
+  trace_id VARCHAR(128) NOT NULL,
+  reason VARCHAR(512) NOT NULL DEFAULT '',
+  before_values JSON NOT NULL,
+  after_values JSON NOT NULL,
+  amount_delta_cents INT NOT NULL DEFAULT 0,
+  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+  CONSTRAINT fk_qipai_order_adjustment_tenant
+    FOREIGN KEY (tenant_id) REFERENCES qipai_tenants(id),
+  CONSTRAINT fk_qipai_order_adjustment_order
+    FOREIGN KEY (order_id) REFERENCES qipai_orders(id),
+  CONSTRAINT fk_qipai_order_adjustment_actor
+    FOREIGN KEY (actor_id) REFERENCES qipai_users(id),
+  UNIQUE KEY uq_qipai_order_adjustment_trace (tenant_id, order_id, trace_id),
+  KEY idx_qipai_order_adjustment_order (tenant_id, order_id, id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+INSERT IGNORE INTO qipai_schema_migrations (version, name)
+VALUES ('2026062013', 'm04c_order_adjustments');

database/migrations/2026062013_m04c_order_adjustments.verify.sql

@@ -0,0 +1,19 @@
+SELECT column_name FROM information_schema.columns
+WHERE table_schema = DATABASE() AND table_name = 'qipai_stores'
+  AND column_name IN ('cancellation_cutoff_minutes', 'cancellation_fee_bps')
+ORDER BY column_name;
+
+SELECT column_name FROM information_schema.columns
+WHERE table_schema = DATABASE() AND table_name = 'qipai_orders'
+  AND column_name IN ('adjustment_amount_cents', 'operator_note')
+ORDER BY column_name;
+
+SELECT table_name FROM information_schema.tables
+WHERE table_schema = DATABASE() AND table_name = 'qipai_order_adjustments';
+
+SELECT index_name FROM information_schema.statistics
+WHERE table_schema = DATABASE() AND table_name = 'qipai_order_adjustments'
+  AND index_name IN ('uq_qipai_order_adjustment_trace', 'idx_qipai_order_adjustment_order')
+GROUP BY index_name ORDER BY index_name;
+
+SELECT version, name FROM qipai_schema_migrations WHERE version = '2026062013';

docs/api-changelog/2026-06-20-M04-C-order-adjustments.md

@@ -0,0 +1,10 @@
+# M04-C 订单调整 API
+
+- `GET /app-api/orders/:orderId/cancellation-quote`：按门店提前取消分钟数和费率返回取消费、可退金额；退款执行留给 M05/M07。
+- `POST /admin-api/orders/:orderId/renew`：按当前价或原锁定单价续费，并重新检查后续时段。
+- `POST /admin-api/orders/:orderId/change-room`：事务内换房并计算基础房价差额。
+- `POST /admin-api/orders/:orderId/adjust-time`：管理员增减订单时间。
+- `POST /admin-api/orders/:orderId/note`：记录管理员备注。
+- `POST /admin-api/orders/reserve-on-behalf`：管理员在门店数据范围内代下单。
+
+所有调整金额均由服务端计算，客户端提交金额字段会被严格拒绝。每个调整使用订单 + traceId 幂等，并记录前后值、原因、操作者和审计日志。

docs/db-changelog/2026-06-20-M04-C-order-adjustments.md

@@ -0,0 +1,9 @@
+# M04-C 订单调整数据库变更
+
+- 迁移版本：`2026062013`
+- 门店新增取消提前量和取消费率配置。
+- 订单新增累计调整金额和管理员备注。
+- 新增 `qipai_order_adjustments`，记录续费、换房、调时和备注的前后值、差额、操作者、来源、原因与 traceId。
+- `(tenant_id, order_id, trace_id)` 唯一约束保证人工调整幂等。
+
+续费、换房和调时均在事务内锁定订单与相关房间，检查禁用时段和重叠预占；失败时订单、预占和金额全部回滚。

scripts/dev/windows/check-backend.ps1

@@ -52,6 +52,9 @@ $requiredFiles = @(
   "database/migrations/2026062012_m04b_order_state_machine.up.sql",
   "database/migrations/2026062012_m04b_order_state_machine.down.sql",
   "database/migrations/2026062012_m04b_order_state_machine.verify.sql",
+  "database/migrations/2026062013_m04c_order_adjustments.up.sql",
+  "database/migrations/2026062013_m04c_order_adjustments.down.sql",
+  "database/migrations/2026062013_m04c_order_adjustments.verify.sql",
   "database/seeds/2026061601_m01b_minimal_seed.sql",
   "deploy/pm2/ecosystem.config.cjs"
 )

scripts/dev/wsl/mysql-migration-roundtrip.sh

@@ -93,6 +93,6 @@ export QIPAI_MYSQL_USER="${username}"
 export QIPAI_MYSQL_PASSWORD="${password}"
 export QIPAI_MYSQL_CONNECTION_LIMIT=2
 
-echo "INFO: MySQL ${mysql_version}; running M01-B through M04-B migration roundtrip in a temporary database."
+echo "INFO: MySQL ${mysql_version}; running M01-B through M04-C migration roundtrip in a temporary database."
 npm --prefix backend run test:mysql:migration
-echo "PASS: M01-B through M04-B live MySQL migration roundtrip completed."
+echo "PASS: M01-B through M04-C live MySQL migration roundtrip completed."