feat(rust): chat titles, BetterChat group styles, the voice and popups (phase 17)

PLAN.md §33, D134-D143. Protocol 12.

- Chat titles (D135-D137): per-server rules (stat, top N, text, colour)
  that rank the current wipe, and a mode (first | all | up to N). Worked
  out once in model/titles and read three ways: pushed whole to the game by
  a new titleSync loop (on change, restart or wipe), and on every
  leaderboard row as `titles`. Admin: PUT /servers/:id/titles.
- Group styles (D138, D139): a site group may carry all twelve BetterChat
  fields (rust_perm_group_chat). They ride perm.sync with `expect` from the
  pushed ledger, which gains a value column; a field changed in game is a
  `chat-field` drift row with the game's value, adopted into the style or
  put back. A withdrawn style is one `chat-group` retirement, never for
  `default`, cleared from the ledger only once BetterChat removed it.
- The voice (D140): one fleet setting naming a styled group; news and
  rust.announce chat lines carry its format and the plugin says them with
  no sender. Admin: GET/PUT /voice.
- Popups (D141, D142): rust.announce gains `delivery` (still version 1,
  from rust.options.delivery); each server gains news_delivery beside the
  news switch; `popup-unavailable` is not retried.
- GET /servers/:id/integrations reads, live, which optional mods a server
  has loaded. README lists BetterChat and PopupNotifications as optional.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

server/model/visibility/visibility.db.js

@@ -34,7 +34,8 @@ async function getServerPresence(serverId) {
 /** Every configured server with its override, in the operator's own order. */
 async function listServerPresence() {
   return core.query(
-    `SELECT id, name, enabled, presence_audience AS presence, announce_news AS announceNews
+    `SELECT id, name, enabled, presence_audience AS presence, announce_news AS announceNews,
+            news_delivery AS newsDelivery
        FROM ${SERVERS}
       ORDER BY sort_order ASC, id ASC`,
   )
@@ -60,4 +61,17 @@ async function setServerNews(serverId, on) {
   await core.query(`UPDATE ${SERVERS} SET announce_news = ? WHERE id = ?`, [on ? 1 : 0, serverId])
 }
 
-module.exports = { getSetting, setSetting, getServerPresence, listServerPresence, setServerPresence, setServerNews }
+/** Where one server's news goes when its switch is on: `chat` or `popup` (D142). */
+async function setServerNewsDelivery(serverId, delivery) {
+  await core.query(`UPDATE ${SERVERS} SET news_delivery = ? WHERE id = ?`, [delivery, serverId])
+}
+
+module.exports = {
+  getSetting,
+  setSetting,
+  getServerPresence,
+  listServerPresence,
+  setServerPresence,
+  setServerNews,
+  setServerNewsDelivery,
+}