fix(chat): create inbox via apply-batch (POST /api/ea2/flow rejects _key)

src/lib/chatApi.ts

@@ -41,10 +41,13 @@ async function ensureInbox(inboxKey: string, email: string, signal?: AbortSignal
     const head = await fetch(`${api.config.baseUrl}/api/ea2/flow/${inboxKey}`, { headers: authHeaders(), signal });
     if (head.ok) return true;
   } catch { /* fall through */ }
-  const created = await fetch(`${api.config.baseUrl}/api/ea2/flow`, {
-    method: "POST",
-    headers: authHeaders(),
-    body: JSON.stringify({
+  const body = {
+    request_id: newRequestId(),
+    ops: [
+      {
+        op: "create",
+        coll: "flow",
+        data: {
           _key: inboxKey,
           kind: "value",
           status: "published",
@@ -53,7 +56,14 @@ async function ensureInbox(inboxKey: string, email: string, signal?: AbortSignal
           description: `Chat inbox anchor for ${email}`,
           source_context: "CANVAS_CHAT_INBOX",
           config: { chat: { owner_email: email } },
-    }),
+        },
+      },
+    ],
+  };
+  const created = await fetch(`${api.config.baseUrl}/api/ea2/apply-batch`, {
+    method: "POST",
+    headers: authHeaders(),
+    body: JSON.stringify(body),
     signal,
   });
   return created.ok || created.status === 409;