Put a question to the reader on a row of its own

An AskUserQuestion arrived in the middle of a run of tool calls and was
folded into the collapsed card with them, so the one row where somebody
was asked something -- and the answer they gave -- was hidden behind
"Called 6 tools" like any other grep.

It now starts a run of its own and ends the one before it, which needs no
change to the grouping: a run of one is drawn as itself. The calls around
it become a group before and a group after, so where the work stopped to
ask is legible from the shape of the transcript without opening anything.

Echo's `/ask` now runs three ordinary calls on each side of the question,
because that is the shape this has to be looked at in and there was no
way to produce it.

app/androidApp/src/main/kotlin/com/example/aiapp/ToolRows.kt

@@ -296,5 +296,10 @@ private fun PermissionAsk(ask: TranscriptItem.QuestionCard, onAnswer: (List<Stri
     }
 }
 
-/** The tool whose input is a question rather than a command; see [AskUserQuestionBody]. */
-private const val ASK_USER_QUESTION = "AskUserQuestion"
+/**
+ * The tool whose input is a question rather than a command; see [AskUserQuestionBody].
+ *
+ * Also what [runIdFor] breaks a run of calls on, so the row a reader answered is never folded
+ * inside a collapsed group.
+ */
+const val ASK_USER_QUESTION = "AskUserQuestion"