agent page: inbox view of last 30 messages addressed to this agent

new wire request AgentRequest::Recent { limit } / ManagerRequest::Recent
(plus matching responses with Vec<InboxRow>). InboxRow moved to
hive-sh4re so it lives on both surfaces without an internal-to-wire
conversion. host-side dispatch in agent_server / manager_server
calls broker.recent_for(name, limit).

per-agent web_ui /api/state grew an inbox: Vec<InboxRow> populated
via the same per-agent socket (best-effort; transport failure
returns empty). frontend renders as a collapsible <details> section
between the state row and the terminal — fmt timestamp / from /
body in a tight grid, capped at 16em scrollable. only visible when
there are rows.

hive-ag3nt/assets/agent.css

@@ -130,6 +130,42 @@ pre.diff {
   align-items: center;
   gap: 0.6em;
 }
+/* Per-agent inbox section — collapsible, dim, lives between the
+   state row and the terminal so the operator can peek at what
+   landed without scrolling through the live tail. */
+.agent-inbox {
+  margin: 0.4em 0;
+  font-size: 0.85em;
+  color: var(--muted);
+}
+.agent-inbox > summary {
+  cursor: pointer;
+  letter-spacing: 0.05em;
+  list-style: none;
+}
+.agent-inbox > summary::marker { content: ''; }
+.agent-inbox[open] > summary > span::before { content: ''; }
+.agent-inbox ul {
+  list-style: none;
+  padding: 0.4em 0.8em;
+  margin: 0.3em 0 0;
+  background: rgba(255, 255, 255, 0.02);
+  border-left: 2px solid var(--purple-dim);
+  max-height: 16em;
+  overflow-y: auto;
+}
+.agent-inbox li {
+  padding: 0.15em 0;
+  display: grid;
+  grid-template-columns: auto auto auto 1fr;
+  gap: 0.5em;
+  align-items: baseline;
+}
+.agent-inbox .inbox-ts   { color: var(--muted); font-size: 0.9em; }
+.agent-inbox .inbox-from { color: var(--amber); }
+.agent-inbox .inbox-sep  { color: var(--muted); }
+.agent-inbox .inbox-body { color: var(--fg); white-space: pre-wrap; word-break: break-word; }
+
 .last-turn {
   color: var(--muted);
   font-size: 0.8em;

hive-ag3nt/assets/app.js

@@ -337,6 +337,30 @@
     }
     renderStateBadge();
   }
+  function renderInbox(rows) {
+    const root = $('inbox-section');
+    const list = $('inbox-list');
+    const summary = $('inbox-summary');
+    if (!root || !list || !summary) return;
+    if (!rows.length) {
+      root.hidden = true;
+      return;
+    }
+    root.hidden = false;
+    summary.textContent = 'inbox · ' + rows.length;
+    list.innerHTML = '';
+    const fmt = (n) => new Date(n * 1000).toISOString().replace('T', ' ').slice(5, 19);
+    for (const m of rows) {
+      const li = el('li');
+      li.append(
+        el('span', { class: 'inbox-ts' }, fmt(m.at)), ' ',
+        el('span', { class: 'inbox-from' }, m.from), ' ',
+        el('span', { class: 'inbox-sep' }, '→'), ' ',
+        el('span', { class: 'inbox-body' }, m.body),
+      );
+      list.append(li);
+    }
+  }
   function renderLastTurn(ms) {
     const el_ = $('last-turn');
     if (!el_) return;
@@ -386,6 +410,7 @@
       const s = await resp.json();
       if (!headerSet) { setHeader(s.label, s.dashboard_port); headerSet = true; }
       renderTermInput(s.label, s.status === 'online');
+      renderInbox(s.inbox || []);
       // Drive the state badge from the harness status. Live SSE events
       // override to 'thinking' / 'idle' as turns start/end; this only
       // kicks in for the not-online (offline) case and the initial seed.

hive-ag3nt/assets/index.html

@@ -19,6 +19,11 @@
     <button type="button" id="cancel-btn" class="btn-cancel-turn" hidden>■ cancel turn</button>
   </div>
 
+  <details id="inbox-section" class="agent-inbox" hidden>
+    <summary>▸ <span id="inbox-summary">inbox</span></summary>
+    <ul id="inbox-list"></ul>
+  </details>
+
   <div class="terminal-wrap">
     <div id="live" class="live terminal"><div class="meta">connecting…</div></div>
     <div id="term-input" class="term-input"></div>