feat(rust): the rewards — tally, kit reward, chat and the news leg (phase 13b, protocol 10)

Four event verbs and the announce leg, per PLAN.md §29:

- rust.participation.open / .collect: the plugin counts who takes part
  (seconds, kills or both, in a zone this run opened or the whole server)
  and collect files them as the run's participants, keyed by Steam id.
- rust.kit.entitle: the five recipient modes (D101), rows in the new
  rust_perm_run_grants (D84) unioned into the permission push, one extra
  use of the kit per reward as site-held credits on perm.sync (D103),
  and the rust.kit.entitled notice deferred from phase 10 (D64).
- rust.announce: one server or every server (D105).
- rust.chat announce leg, speaking only on servers whose new news switch
  is on (D104) - a card on Admin -> Rust visibility (D106).

Budgets rust.grants and rust.announcements; the kit source and four
fixed-choice sources (core has no enum param type). rust_perm_run_grants
carries core's idempotency key so a revert of a lost answer can find its
rows. Protocol 10.

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

server/test/visibility.test.js

@@ -185,6 +185,31 @@ test('the clan roster audience defaults to members, and a bad one writes nothing
   }
 })
 
+test('news in game chat is off by default, on or off per server, and validated whole (D104, D106)', async () => {
+  const { model, written, restore } = setup({ overrides: { main: null } })
+  const db = require('../model/visibility/visibility.db')
+  const news = []
+  db.setServerNews = async (id, on) => news.push({ id, on })
+  try {
+    // A row that never had the column set reads as off.
+    assert.deepEqual((await model.describe()).news.servers, [{ id: 'main', name: 'MAIN', enabled: true, on: false }])
+
+    const notBoolean = await model.update({ news: { main: 'yes' } })
+    assert.equal(notBoolean.status, 400)
+    const unknown = await model.update({ fleet: 'public', news: { main: true, nope: true } })
+    assert.equal(unknown.status, 404)
+    assert.deepEqual(news, [])
+    assert.deepEqual(written.settings, [], 'the fleet change beside it was not written either')
+
+    const ok = await model.update({ news: { main: true } }, { id: 3 })
+    assert.equal(ok.ok, true)
+    assert.deepEqual(news, [{ id: 'main', on: true }])
+    assert.deepEqual(ok.changed.news, { main: true })
+  } finally {
+    restore()
+  }
+})
+
 // ── The public routes ─────────────────────────────────────────────────────
 
 /** A response double recording what a handler answered. */