fix(user-interaction): preserve multi-select custom answers

packages/ui/tool-ask-user/README.i18n.yaml

@@ -1,6 +1,6 @@
 # Bilingual-pair consistency record (docs/i18n/README.md): the git blob hash of each
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
-#   pnpm run verify-translation-pairing --write
-README.md: 8e779f4025c20cd200344efb7cb8cd6bc09ba64d
-README.zh.md: fe1dc5559882532c4f44e705cc6daa2c7f4f8905
+#   pnpm run verify-translation-pairing --write packages/ui/tool-ask-user/README.md
+README.md: 64da4d75d01a0df0ae51b1557ed1c796317b906f
+README.zh.md: 8a1eb3ee4f9e9ccc2ea2fe433bf85158c76d3549

packages/ui/tool-ask-user/README.md

@@ -15,7 +15,7 @@ Model-facing `ask_user_question` tool over `ctx.userInteraction`. It lets the mo
 - `options` — optional choices with `label` and `description`. If recommending a choice, put it first and append `(Recommended)` to that label.
 - `multi_select` — whether that question may return more than one selected option.
 
-The tool calls `ctx.userInteraction.ask()` and returns canonical `{ answers: [{ id, selected, custom? }] }`. `selected` contains option labels; `custom` is present only for a free-form answer and overrides selected choices. The Native renderer preserves the compact JSON text shape `{ "answers": [{ "id": "...", "selected": ["..."], "custom": "..." }] }`.
+The tool calls `ctx.userInteraction.ask()` and returns canonical `{ answers: [{ id, selected, custom? }] }`. `selected` contains option labels; `custom` carries a free-form answer, supplementing `selected` for a multi-select question and overriding it for a single-select question. The Native renderer preserves the compact JSON text shape `{ "answers": [{ "id": "...", "selected": ["..."], "custom": "..." }] }`.
 
 ## Role
 

packages/ui/tool-ask-user/README.zh.md

@@ -15,7 +15,7 @@
 - `options`：可选选项，包含 `label` 和 `description`。如需推荐某个选项，请将其置于首位，并在该标签末尾追加 `(Recommended)`。
 - `multi_select`：该问题是否可以返回多个选中的选项。
 
-工具调用 `ctx.userInteraction.ask()`，并返回规范的 `{ answers: [{ id, selected, custom? }] }`。`selected` 包含选项标签；仅当用户自由填写回答时才会出现 `custom`，并覆盖选中的选项。Native renderer 会保留紧凑的 JSON 文本形式 `{ "answers": [{ "id": "...", "selected": ["..."], "custom": "..." }] }`。
+工具调用 `ctx.userInteraction.ask()`，并返回规范的 `{ answers: [{ id, selected, custom? }] }`。`selected` 包含选项标签；`custom` 携带自由填写的回答，对于多选题会补充 `selected`，对于单选题则会覆盖它。Native renderer 会保留紧凑的 JSON 文本形式 `{ "answers": [{ "id": "...", "selected": ["..."], "custom": "..." }] }`。
 
 ## 职责
 

packages/ui/tool-ask-user/tests/tool-ask-user.spec.ts

@@ -140,7 +140,7 @@ describe('ask_user_question tool', () => {
       async ask() {
         return {
           answers: [
-            { id: 'targets', selected: ['tests', 'docs'] },
+            { id: 'targets', selected: ['tests', 'docs'], custom: 'release notes' },
             { id: 'notes', selected: [], custom: 'ship today' },
           ],
         }
@@ -168,13 +168,13 @@ describe('ask_user_question tool', () => {
     if (result.isError) throw new Error('expected ask_user_question success')
     expect(result.value).toEqual({
       answers: [
-        { id: 'targets', selected: ['tests', 'docs'] },
+        { id: 'targets', selected: ['tests', 'docs'], custom: 'release notes' },
         { id: 'notes', selected: [], custom: 'ship today' },
       ],
     })
     expect(result.content).toEqual([{
       type: 'text',
-      text: '{"answers":[{"id":"targets","selected":["tests","docs"]},{"id":"notes","selected":[],"custom":"ship today"}]}',
+      text: '{"answers":[{"id":"targets","selected":["tests","docs"],"custom":"release notes"},{"id":"notes","selected":[],"custom":"ship today"}]}',
     }])
   })