fix(oracle-l8-r3): wizard 'Manual review' + chat cold-start seed

Close Oracle's two standing caveats so they can't gate a future loop:

1. Wizard dispatch label 'Person' was vague (Oracle: could imply chat
   recipient, not work-routing). Now 'Manual review' in both dropdown
   and preview-pane badge. dispatch_kind storage value unchanged
   ('human'/'agent'/'system' for EA2).

2. Chat unread cold-start. Topbar badge depended entirely on
   localStorage being populated by Chat scene's first visit. Fresh
   browser / private window / cleared storage saw 0 unread until then.
   Added seedHeadsIfMissing in App.tsx topbar poll: on first refresh
   (and only when localStorage heads count < thread count), fetches
   last message per thread ONCE and persists to localStorage. Subsequent
   ticks reuse the cache — same idle-poll budget (test still PASS).

src/App.tsx

@@ -102,6 +102,28 @@ export default function App() {
       }
       return n;
     };
+    // Cold-start: if localStorage heads map is empty/stale (fresh browser,
+    // private window, cleared site data), fetch the last message per thread
+    // ONCE on first mount so the badge isn't lying. Subsequent ticks reuse the
+    // localStorage cache — same idle-poll budget as before.
+    const seedHeadsIfMissing = async (threads: { _key: string }[]) => {
+      try {
+        const existing = JSON.parse(localStorage.getItem(`fm.canvas.chat.heads.${userEmail}`) || "{}");
+        if (Object.keys(existing).length >= threads.length) return;
+      } catch { /* fall through */ }
+      const { chatApi } = await import("./lib/chatApi");
+      const heads: Record<string, { at: string; by: string }> = {};
+      await Promise.all(
+        threads.map(async (t) => {
+          try {
+            const rows = await chatApi.listMessages(t._key);
+            const last = rows[rows.length - 1];
+            if (last) heads[t._key] = { at: last.created_at, by: last.author_email };
+          } catch { /* ignore */ }
+        })
+      );
+      try { localStorage.setItem(`fm.canvas.chat.heads.${userEmail}`, JSON.stringify(heads)); } catch { /* ignore */ }
+    };
     const refresh = async () => {
       try {
         const { chatApi } = await import("./lib/chatApi");
@@ -111,6 +133,8 @@ export default function App() {
           apiMod.workItems().catch(() => []),
         ]);
         if (cancelled) return;
+        await seedHeadsIfMissing(threads);
+        if (cancelled) return;
         setChatUnreadCount(computeUnread(threads.map((t) => t._key)));
         setQueueCount(items.filter((it) => (it as any).tenant_id === tenantId).length);
       } catch { /* ignore */ }

src/scenes/Wizard.tsx

@@ -281,7 +281,7 @@ export default function Wizard() {
                 <li key={n._key || i} className="wizard-preview-chain-item">
                   <span className="wizard-preview-chain-idx">{i + 1}</span>
                   <span className="wizard-preview-chain-name">{n.display_name || "Untitled step"}</span>
-                  <span className={`wizard-preview-chain-kind kind-${n.dispatch_kind || "human"}`}>{({ human: "Person", agent: "Assistant", system: "System" } as Record<string, string>)[n.dispatch_kind || "human"] || "Person"}</span>
+                  <span className={`wizard-preview-chain-kind kind-${n.dispatch_kind || "human"}`}>{({ human: "Manual review", agent: "Assistant", system: "System" } as Record<string, string>)[n.dispatch_kind || "human"] || "Manual review"}</span>
                 </li>
               ))}
             </ol>
@@ -412,7 +412,7 @@ export default function Wizard() {
                           updateDraft({ nodes: newNodes });
                         }}
                       >
-                        <option value="human">Person</option>
+                        <option value="human">Manual review</option>
                         <option value="agent">Assistant</option>
                         <option value="system">System</option>
                       </select>