feat(rust): Guarded Crate — feed, map, Warden, Place a guarded crate (PLAN_REDESIGNS §14.3.5)

Stage 6 of the §14.3 integration plan, on protocol 14. Spec: docs
rust-link/PROTOCOL.md §20.9.

- gc.started and gc.ended public, gc.failed staff's; guardedCrate.js reads
  each row per viewer (the clearer's name for the presence audience, Steam id,
  position and key for staff, `won` for everyone).
- Triggers rust.gc.started and rust.gc.ended (a crate a player cleared only).
- The step rust.gc.place: an event from rust.options.gc_events and a world
  call's location; refused at verify for Guarded Crate absent, NpcSpawn missing
  (D364), console unavailable, or an unknown event. Kept (D373); the run log's
  success line says so (D380). Budget rust.gc.crates.
- Warden (D375): guarded_won, title category guardedwon, Crates cleared column.
- Map marker, server settings line, swagger, engagement manifest, bundle, README.

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

client/src/lib/feed.js

@@ -55,6 +55,10 @@ export const FEED_KINDS = Object.freeze([
   // ending (`dt.ended`) is staff's, and the map shows the chest go.
   'dt.started',
   'dt.won',
+  // Guarded Crate (§14.3.5): a crate landing, and one cleared, read per viewer
+  // like a treasure. A timeout (`gc.failed`) is staff's; the map shows it go.
+  'gc.started',
+  'gc.ended',
 ])
 
 /** The filters the feed offers, and the kinds each one asks the API for. */
@@ -69,7 +73,7 @@ export const FILTERS = Object.freeze([
   },
   { id: 'server', label: 'Server', kinds: ['server.wipe', 'server.initialized', 'server.shutdown'] },
   { id: 'bosses', label: 'Bosses', kinds: ['npc.boss.spawned', 'npc.boss.died'] },
-  { id: 'world', label: 'World events', kinds: ['world.event', 'pvp.zone.created', 'dt.started', 'dt.won'] },
+  { id: 'world', label: 'World events', kinds: ['world.event', 'pvp.zone.created', 'dt.started', 'dt.won', 'gc.started', 'gc.ended'] },
 ])
 
 export function kindsFor(filterId) {
@@ -168,6 +172,11 @@ export function describe(row) {
     case 'dt.ended':
       return treasureLine(row.kind, frame)
 
+    case 'gc.started':
+    case 'gc.ended':
+    case 'gc.failed':
+      return guardedLine(row.kind, frame)
+
     default:
       return { tone: 'other', actor: name, verb: String((row && row.kind) || 'unknown'), subject: null, detail: '' }
   }
@@ -377,4 +386,25 @@ function treasureLine(kind, frame) {
     : { tone: 'kill', actor: null, verb: 'The treasure was won', subject: null, detail }
 }
 
+/**
+ * Guarded Crate (protocol 14, PLAN_REDESIGNS §14.3.5). The server has read the
+ * frame for this viewer: `grid`, `won` (whether a player killed the last
+ * guard), and the clearer's `name` only for the presence audience (D376).
+ */
+function guardedLine(kind, frame) {
+  const detail = frame.grid || ''
+  if (kind === 'gc.started') {
+    return { tone: 'server', actor: null, verb: 'A guarded crate landed', subject: null, detail }
+  }
+  if (kind === 'gc.failed') {
+    return { tone: 'server', actor: null, verb: 'A guarded crate timed out with its guards standing', subject: null, detail }
+  }
+  if (frame.won === false) {
+    return { tone: 'server', actor: null, verb: 'A guarded crate ended with nobody clearing it', subject: null, detail }
+  }
+  return frame.name
+    ? { tone: 'kill', actor: frame.name, verb: 'cleared the guarded crate', subject: null, detail }
+    : { tone: 'kill', actor: null, verb: 'The guarded crate was cleared', subject: null, detail }
+}
+
 export default { describe, FEED_KINDS, FILTERS, kindsFor }