feat: ask_user — structured questions from the agent with web card, channel buttons, and text answers (#109922)

* feat(gateway): add transient question runtime (question.* methods + broadcasts)

* feat(agents): add blocking ask_user question tool with chat prompt delivery and text-reply claim

* feat(ui): interactive in-thread question cards for ask_user

* feat(channels): native tap-to-answer buttons for ask_user on Telegram, Discord, and Slack

* feat(ui): unify codex and gateway question cards with interactive gateway answering

* refactor(agents): collapse ask_user pending state to one registry; docs for ask_user

* fix(agents): include ask_user in normal gateway runs; add question-flow control-ui e2e

* test(ui): avoid credential-shaped fixture in question card test

* refactor(ui): reorder stream-group context keys

* fix(gateway,ui): validate question answers at resolve; reject secret/duplicate-label questions; UI retry and reconnect hardening

* fix(gateway,agents): canonicalize accepted option answers; bound ask_user option labels to 64 chars

* chore(ci): prune unused question exports, allowlist mobile question events, fix discord lint

* chore(ci): regenerate protocol/i18n/docs/tool-display artifacts for question surface

* fix(protocol): flatten QuestionRecord for native codegen; drop TS-only alias from schema registry

* chore(android): regenerate ask-user localization resources

* docs: regenerate docs map after rebase

* fix(ci): avoid stale read-only dependency disks

* test: remove stale reef lint suppression ratchet

* fix(ci): keep source locale drift advisory in release gates

* fix(ci): scope locale advisory handling to parity check

docs/docs_map.md

@@ -9493,6 +9493,15 @@ Do not edit it by hand; run `pnpm docs:map:gen`.
   - H2: Example
   - H2: Related
 
+## tools/ask-user.md
+
+- Route: /tools/ask-user
+- Headings:
+  - H2: Answer a question
+  - H2: Timeout and no answer
+  - H2: Tool schema
+  - H2: Model guidance
+
 ## tools/brave-search.md
 
 - Route: /tools/brave-search