新增 affiliate_dash 履约配置与商品映射(阶段 3)

- bootstrap CORE_PROFILES + routing ROUTABLE/DEFAULT_PRIORITY 接入 affiliate_dash
- planner 上下文 affiliateDash 块 + resolveDynamicAffiliateDashProfile
- product-resolution: 91 productNo→sku 映射匹配(skuMapping) + snapshot.affiliateDash
- prepare 前余额预检(getAffiliateDashWallet)
- AFFILIATE_DASH_SKU_MAPPING_JSON env 注入
- admin 后端接口(GET/POST 配置、match、products、wallet)+ 前端 Tabs 面板
- 联调:模拟 91 进单命中 affiliate_dash 路由, 未命中回退;前后端 typecheck + 212 测试通过

apps/backend/src/config/env-overrides.ts

@@ -17,6 +17,7 @@ type RuntimeConfigValue =
   | AdminDefaultUser[]
   | KuaishouFeifeiProductRule[]
   | string[]
+  | Record<string, string>
 type RuntimeEnv = Record<string, string | undefined>
 
 type EnvOverride = {
@@ -182,6 +183,11 @@ export const ENV_OVERRIDES: readonly EnvOverride[] = [
     'affiliateDash',
     'timestampToleranceSeconds',
   ]),
+  affiliateDashSkuMappingEnv('AFFILIATE_DASH_SKU_MAPPING_JSON', [
+    'platforms',
+    'affiliateDash',
+    'skuMapping',
+  ]),
   corsOriginsEnv('CORS_ALLOWED_ORIGINS', ['cors', 'allowedOrigins']),
 ]
 
@@ -268,6 +274,28 @@ function kuaishouFeifeiProductRulesEnv(env: string, configPath: RuntimeConfigPat
   }
 }
 
+function affiliateDashSkuMappingEnv(env: string, configPath: RuntimeConfigPath): EnvOverride {
+  return {
+    env,
+    path: configPath,
+    read(rawValue) {
+      const text = String(rawValue ?? '').trim()
+      if (!text) {
+        return null
+      }
+      try {
+        const parsed = JSON.parse(text)
+        if (parsed && typeof parsed === 'object' && !Array.isArray(parsed)) {
+          return parsed as Record<string, string>
+        }
+      } catch {
+        // 忽略非法 JSON
+      }
+      return null
+    },
+  }
+}
+
 function corsOriginsEnv(env: string, configPath: RuntimeConfigPath): EnvOverride {
   return {
     env,