feat: 物品规则支持按数量计价（二次匹配SKU文字数量）

- 规则新增单价（unit_price_fen，0 关闭），开启后接单总价 = 单价 × 商品名称文字中的规格数量
- 新增 resolveSkuNameQuantity：支持阿拉伯数字与中文数字（如 指挥官秘钥15个 → 15、三个 → 3）
- 建单同步时按文字数量计算奖励，skuQuantity 记入工单 material.source 便于核对
- 规则表单新增计价方式（固定金额/按数量×单价），列表展示单价
- 新增 3 个数量解析单元测试（269 全通过）

apps/backend/src/repositories/worker-platform/types.ts

@@ -119,6 +119,7 @@ export type WorkProductRuleRow = {
   enabled: boolean
   auto_create: boolean
   reward_amount: number
+  unit_price_fen: number
   required_deposit_amount: number
   deposit_threshold_amount: number
   sharing_enabled: boolean

apps/backend/src/repositories/worker-platform/work-order-repo.ts

@@ -413,6 +413,7 @@ export async function upsertWorkProductRule(input: {
   enabled: boolean
   autoCreate: boolean
   rewardAmount: number
+  unitPriceFen?: number
   requiredDepositAmount: number
   depositThresholdAmount: number
   sharingEnabled?: boolean
@@ -429,6 +430,7 @@ export async function upsertWorkProductRule(input: {
       INSERT INTO work_product_rules (
         rule_key, provider, platform, shop_id, sku_code, product_name,
         match_type, category_id, enabled, auto_create, reward_amount,
+        unit_price_fen,
         required_deposit_amount, deposit_threshold_amount,
         sharing_enabled, sharing_total_quantity, sharing_unit_reward,
         timeout_minutes, timeout_policy,
@@ -437,11 +439,12 @@ export async function upsertWorkProductRule(input: {
       ) VALUES (
         $1, $2, $3, $4, $5, $6,
         $7, $8, $9, $10, $11,
-        $12, $13,
-        $14, $15, $16,
-        $17, $18,
-        $19::jsonb,
-        $20, $21, $22
+        $12,
+        $13, $14,
+        $15, $16, $17,
+        $18, $19,
+        $20::jsonb,
+        $21, $22, $23
       )
       ON CONFLICT (rule_key) DO UPDATE
       SET
@@ -455,6 +458,7 @@ export async function upsertWorkProductRule(input: {
         enabled = EXCLUDED.enabled,
         auto_create = EXCLUDED.auto_create,
         reward_amount = EXCLUDED.reward_amount,
+        unit_price_fen = EXCLUDED.unit_price_fen,
         required_deposit_amount = EXCLUDED.required_deposit_amount,
         deposit_threshold_amount = EXCLUDED.deposit_threshold_amount,
         sharing_enabled = EXCLUDED.sharing_enabled,
@@ -479,6 +483,7 @@ export async function upsertWorkProductRule(input: {
       input.enabled,
       input.autoCreate,
       input.rewardAmount,
+      Math.max(0, toPositiveInteger(input.unitPriceFen, 0)),
       input.requiredDepositAmount,
       input.depositThresholdAmount,
       input.sharingEnabled === true,