ask_operator tool: non-blocking; operator answer arrives as helper event

new mcp tool on the manager surface that queues a question on the
dashboard and returns the question id immediately. operator submits an
answer via /answer-question/<id>; the dashboard fires
HelperEvent::OperatorAnswered { id, question, answer } into the manager
inbox so the next turn picks it up.

also: fix async-form button stuck on spinner after successful submit
(refreshState skipped re-rendering, so the button was never re-enabled).

hive-c0re/src/operator_questions.rs

@@ -0,0 +1,141 @@
+//! Operator question queue. Manager submits via `AskOperator`; the
+//! operator answers via the dashboard. The manager-socket handler long-polls
+//! the store until the answer lands, so claude's `ask_operator` tool call
+//! returns the answer directly as its result.
+
+use std::path::Path;
+use std::sync::Mutex;
+use std::time::{SystemTime, UNIX_EPOCH};
+
+use anyhow::{Context, Result, bail};
+use rusqlite::{Connection, OptionalExtension, params};
+use serde::Serialize;
+
+const SCHEMA: &str = r"
+CREATE TABLE IF NOT EXISTS operator_questions (
+    id           INTEGER PRIMARY KEY AUTOINCREMENT,
+    asker        TEXT    NOT NULL,
+    question     TEXT    NOT NULL,
+    options_json TEXT    NOT NULL,
+    asked_at     INTEGER NOT NULL,
+    answered_at  INTEGER,
+    answer       TEXT
+);
+CREATE INDEX IF NOT EXISTS idx_operator_questions_pending
+    ON operator_questions (id) WHERE answered_at IS NULL;
+";
+
+#[derive(Debug, Clone, Serialize)]
+pub struct OpQuestion {
+    pub id: i64,
+    pub asker: String,
+    pub question: String,
+    pub options: Vec<String>,
+    pub asked_at: i64,
+    pub answered_at: Option<i64>,
+    pub answer: Option<String>,
+}
+
+pub struct OperatorQuestions {
+    conn: Mutex<Connection>,
+}
+
+impl OperatorQuestions {
+    pub fn open(path: &Path) -> Result<Self> {
+        if let Some(parent) = path.parent() {
+            std::fs::create_dir_all(parent).with_context(|| {
+                format!("create operator_questions db parent {}", parent.display())
+            })?;
+        }
+        let conn = Connection::open(path)
+            .with_context(|| format!("open operator_questions db {}", path.display()))?;
+        conn.execute_batch(SCHEMA)
+            .context("apply operator_questions schema")?;
+        Ok(Self {
+            conn: Mutex::new(conn),
+        })
+    }
+
+    pub fn submit(&self, asker: &str, question: &str, options: &[String]) -> Result<i64> {
+        let conn = self.conn.lock().unwrap();
+        let options_json = serde_json::to_string(options).unwrap_or_else(|_| "[]".into());
+        conn.execute(
+            "INSERT INTO operator_questions (asker, question, options_json, asked_at)
+             VALUES (?1, ?2, ?3, ?4)",
+            params![asker, question, options_json, now_unix()],
+        )?;
+        Ok(conn.last_insert_rowid())
+    }
+
+    /// Mark the question answered. Returns the original question text so the
+    /// caller can include it in any helper event it fires off.
+    pub fn answer(&self, id: i64, answer: &str) -> Result<String> {
+        let conn = self.conn.lock().unwrap();
+        let question: Option<(String, Option<i64>)> = conn
+            .query_row(
+                "SELECT question, answered_at FROM operator_questions WHERE id = ?1",
+                params![id],
+                |row| Ok((row.get(0)?, row.get(1)?)),
+            )
+            .optional()?;
+        let Some((question, answered_at)) = question else {
+            bail!("question {id} not found");
+        };
+        if answered_at.is_some() {
+            bail!("question {id} already answered");
+        }
+        conn.execute(
+            "UPDATE operator_questions SET answer = ?1, answered_at = ?2 WHERE id = ?3",
+            params![answer, now_unix(), id],
+        )?;
+        Ok(question)
+    }
+
+    #[allow(dead_code)]
+    pub fn get(&self, id: i64) -> Result<Option<OpQuestion>> {
+        let conn = self.conn.lock().unwrap();
+        conn.query_row(
+            "SELECT id, asker, question, options_json, asked_at, answered_at, answer
+               FROM operator_questions WHERE id = ?1",
+            params![id],
+            row_to_question,
+        )
+        .optional()
+        .map_err(Into::into)
+    }
+
+    pub fn pending(&self) -> Result<Vec<OpQuestion>> {
+        let conn = self.conn.lock().unwrap();
+        let mut stmt = conn.prepare(
+            "SELECT id, asker, question, options_json, asked_at, answered_at, answer
+               FROM operator_questions
+              WHERE answered_at IS NULL
+              ORDER BY id ASC",
+        )?;
+        let rows = stmt.query_map([], row_to_question)?;
+        rows.collect::<rusqlite::Result<Vec<_>>>()
+            .map_err(Into::into)
+    }
+}
+
+fn row_to_question(row: &rusqlite::Row<'_>) -> rusqlite::Result<OpQuestion> {
+    let options_json: String = row.get(3)?;
+    let options: Vec<String> = serde_json::from_str(&options_json).unwrap_or_default();
+    Ok(OpQuestion {
+        id: row.get(0)?,
+        asker: row.get(1)?,
+        question: row.get(2)?,
+        options,
+        asked_at: row.get(4)?,
+        answered_at: row.get(5)?,
+        answer: row.get(6)?,
+    })
+}
+
+fn now_unix() -> i64 {
+    SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .ok()
+        .and_then(|d| i64::try_from(d.as_secs()).ok())
+        .unwrap_or(0)
+}