feat(rust): Dangerous Treasures — feed, map, Treasure Hunter, Start a Dangerous Treasures event (PLAN_REDESIGNS §14.3.4)

Stage 5 of the §14.3 integration plan, on protocol 14 (docs
rust-link/PROTOCOL.md §20.8).

- dt.started and dt.won are public kinds, dt.ended a staff kind. The new
  dangerousTreasures.js reads each row per viewer: grid and invaderCount for
  everyone, the winner's name for the presence audience (D376), the position,
  the step's key, the winner's Steam id and the invaders for staff.
- Feed lines in the World events filter: "A Dangerous Treasures event has
  started · K12", "Alice won the treasure · K12 · 3 players fought for it".
- Triggers rust.dt.started (with byEvent) and rust.dt.won, public, cooldown
  subject the server, names only.
- eventDangerousTreasures.js: rust.dt.start, "Start a Dangerous Treasures
  event" (risk change, reversible none, budget rust.dt.events), server and
  difficulty. Refused at verify where the server said DT is not loaded or
  console.plugins is false (Rust-Plugins#34). dt-not-ready answers "Dangerous
  Treasures is not ready yet" with retryAfterMs 600000 (D365, D371);
  dt-no-spot retries on core's delay; DT's own refusals are permanent.
- Treasure Hunter (D375): treasuresWon -> treasures_won, the title category
  treasureswon, and a sortable Treasures column shown where the server
  reports DT or a row counts one.
- The map draws a running chest on the world layer; the server settings'
  plugin line names DT and whether a step can start one, from the
  integrations read's new `console`.
- coreApi ^1.15.0, ci/core-ref.json pinned to website main at #215's merge.
  ci/bundle.json ships the two new files; swagger fragment and engagement
  manifest regenerated; README lists DT.

Server 627/627 (16 new in test/dangerousTreasures.test.js) and every check;
client 92/92, build and externals. Booted against the pinned core: 45
triggers, 13 actions, 11 budgets, 21 option sources; 89 routes unchanged.

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

client/src/routes/admin/ChatTitles.jsx

@@ -263,7 +263,22 @@ export function integrationsLine(r) {
   const withEconomics = r.integrations.economics ? `${line} ${economicsLine(r.integrations.economics)}` : line
   const withBackpacks = r.integrations.backpacks ? `${withEconomics} ${backpacksLine(r.integrations.backpacks)}` : withEconomics
   const withTruePve = r.integrations.truePve ? `${withBackpacks} ${truePveLine(r.integrations.truePve)}` : withBackpacks
-  return r.integrations.dynamicPvp ? `${withTruePve} ${dynamicPvpLine(r.integrations.dynamicPvp)}` : withTruePve
+  const withDynamicPvp = r.integrations.dynamicPvp ? `${withTruePve} ${dynamicPvpLine(r.integrations.dynamicPvp)}` : withTruePve
+  return r.integrations.dangerousTreasures ? `${withDynamicPvp} ${dangerousTreasuresLine(r.integrations.dangerousTreasures, r.console)}` : withDynamicPvp
+}
+
+/**
+ * Dangerous Treasures (PLAN_REDESIGNS §14.3.4), from protocol 14: its events on the
+ * feed and the map, and whether a step can start one, which needs the framework
+ * to run its console command (hello's `console.plugins`, D363).
+ */
+export function dangerousTreasuresLine(dt, probe) {
+  if (!dt.loaded) return 'Dangerous Treasures is not loaded — a step cannot start a treasure event.'
+  const name = `Dangerous Treasures ${dt.version || ''}`.trim()
+  if (probe && probe.plugins === false) {
+    return `${name} is loaded — its events show on the feed and the map, but this framework cannot run its console command, so a step cannot start one (Rust-Plugins#34).`
+  }
+  return `${name} is loaded — its events show on the feed and the map, and a step may start one.`
 }
 
 /** Dynamic PVP (PLAN_REDESIGNS §14.3.3), from protocol 14: its zones on the feed and the map. */