fix(manifest): describe optional dependency declarations

packages/util/package-manifest/README.i18n.yaml

@@ -15,8 +15,8 @@
   en: d152484eb41ac6b4
   zh: 1db86285abf6c499
 /deepseek-ai-dsh-package-manifest/use-this-package:
-  en: f275964a8845888a
-  zh: b284e09aacea079b
+  en: 0f5e861b0c0c5ee2
+  zh: 766eaa36b794a22b
 /deepseek-ai-dsh-package-manifest/understand-the-implementation:
   en: 41ec449dee927f04
   zh: ec1b583bd9025d84

packages/util/package-manifest/README.md

@@ -43,7 +43,7 @@ const manifest: DshPackageManifest = {
 }
 ```
 
-`DshPackageManifest` describes the package.json fields used by DSH, with required `name` and `version`; it is not an exhaustive npm schema. Local profile readers use `Partial<DshPackageManifest>` because profiles need no published version. `DshManifest` describes only public author fields under `dsh`. `DshBundleManifest.patch` is one patch file path or an ordered list of them, each relative to the package root; the launcher applies a list in order as one bundle layer. TypeScript checks the example and erases `import type`; these interfaces do not parse JSON or write a file.
+`DshPackageManifest` describes the package.json fields used by DSH, with required `name` and `version`; it includes dependency, peer, and optional dependency declarations but is not an exhaustive npm schema. Local profile readers use `Partial<DshPackageManifest>` because profiles need no published version. `DshManifest` describes only public author fields under `dsh`. `DshBundleManifest.patch` is one patch file path or an ordered list of them, each relative to the package root; the launcher applies a list in order as one bundle layer. TypeScript checks the example and erases `import type`; these interfaces do not parse JSON or write a file.
 
 The following metadata fields are optional. Omitting them leaves the format version or compatible host versions undeclared; readers do not infer defaults.
 

packages/util/package-manifest/README.zh.md

@@ -43,7 +43,7 @@ const manifest: DshPackageManifest = {
 }
 ```
 
-`DshPackageManifest` 描述 DSH 使用的 package.json 字段，其中 `name` 和 `version` 必填；它不是完整的 npm schema（模式）。本地 profile 读取方使用 `Partial<DshPackageManifest>`，因为 profile 无需发布版本。`DshManifest` 仅描述 `dsh` 下的公共作者字段。`DshBundleManifest.patch` 是一个 patch 文件路径，或一个有序的路径列表，均相对于包根目录；launcher 按列表顺序把它们作为同一个组合包层应用。TypeScript 检查示例并删除 `import type`；这些接口不解析 JSON，也不写入文件。
+`DshPackageManifest` 描述 DSH 使用的 package.json 字段，其中 `name` 和 `version` 必填；它包含普通依赖、peer 依赖及可选依赖声明，未覆盖 npm 的所有字段。本地 profile 读取方使用 `Partial<DshPackageManifest>`，因为 profile 无需发布版本。`DshManifest` 仅描述 `dsh` 下的公共作者字段。`DshBundleManifest.patch` 是一个 patch 文件路径，或一个有序的路径列表，均相对于包根目录；launcher 按列表顺序把它们作为同一个组合包层应用。TypeScript 检查示例并删除 `import type`；这些接口不解析 JSON，也不写入文件。
 
 以下元数据字段均可选。省略时，格式版本或兼容的宿主版本保持未声明状态；读取方不推断默认值。
 

packages/util/package-manifest/src/types.ts

@@ -18,6 +18,8 @@ export interface DshPackageManifest {
   private?: boolean
   /** Packages installed alongside this package. */
   dependencies?: Record<string, string>
+  /** Packages that may be absent when installation or platform checks skip them. */
+  optionalDependencies?: Record<string, string>
   /** Compatible versions of packages supplied by the consuming project. */
   peerDependencies?: Record<string, string>
   /** Runtime requirements; DSH compatibility is declarative until a reader enforces it. */