收紧后端 TypeScript：统一 Json 类型与 TaskContext 契约

关闭 allowJs；集中 JsonObject 定义并替换分散 any 别名；parseTaskContext 返回 TaskContext；任务详情 API 标注 AdminTaskDetailView；测试减少 as any。

apps/backend/src/utils/logger.ts

@@ -6,6 +6,7 @@ import util from 'node:util'
 import { PROJECT_ROOT, runtimeConfig } from '../config/runtime.js'
 import type { HttpErrorLike } from './http.js'
 import { maskSecret } from './masking.js'
+import { asJsonObject } from '../types/json.js'
 
 type LogLevel = 'debug' | 'info' | 'warn' | 'error'
 type LogChannel = 'app' | 'integration'
@@ -362,7 +363,7 @@ function isSensitiveLogKey(key: unknown): boolean {
 function normalizeExternalHttpPacketDetail(
   detail: ExternalHttpPacketDetail,
 ): ExternalHttpPacketDetail {
-  const source = detail && typeof detail === 'object' && !Array.isArray(detail) ? detail : {}
+  const source = asJsonObject(detail)
   const normalized: ExternalHttpPacketDetail = {}
 
   for (const [key, value] of Object.entries(source)) {

apps/backend/src/utils/task-json.ts

@@ -1,26 +1,34 @@
-export type JsonRecord = Record<string, any>
+import type { JsonObject, JsonRecord } from '../types/json.js'
+import { asJsonObject, isPlainObject } from '../types/json.js'
+import type { TaskContext } from '../types/task-context.js'
 
-export function parseJsonObject(value: unknown): JsonRecord {
+export type { JsonRecord, JsonObject }
+
+export function parseJsonObject(value: unknown): JsonObject {
   if (!value) {
     return {}
   }
 
-  if (typeof value === 'object' && !Array.isArray(value)) {
-    return value as JsonRecord
+  if (isPlainObject(value)) {
+    return value
   }
 
   try {
-    const parsed = JSON.parse(String(value || '{}'))
-    return parsed && typeof parsed === 'object' && !Array.isArray(parsed) ? parsed : {}
+    const parsed = JSON.parse(String(value || '{}')) as unknown
+    return asJsonObject(parsed)
   } catch {
     return {}
   }
 }
 
-export function parseTaskContext(task: { context_json?: unknown } | null | undefined): JsonRecord {
-  return parseJsonObject(task?.context_json)
+export function parseTaskContext(
+  task: { context_json?: unknown } | null | undefined,
+): TaskContext {
+  return parseJsonObject(task?.context_json) as TaskContext
 }
 
-export function parseTaskState(task: { state_json?: unknown } | null | undefined): JsonRecord {
+export function parseTaskState(
+  task: { state_json?: unknown } | null | undefined,
+): JsonObject {
   return parseJsonObject(task?.state_json)
 }