App mode support; hide ComfyUI's Workflows and Apps tabs

Live edits keep each person's graph/App view, cursors are off in the App
view, and .app.json workflows show as apps in Files, the Live list and Save.
ComfyUI's own file tabs duplicate Files, so they are hidden by default (admin
setting hide_comfy_file_tabs) and their shortcuts open Files.

tests/python/test_server.py

@@ -324,3 +324,30 @@ def test_chat_history_pages(run):
             assert "hello 0" in texts and seqs == list(range(len(seqs))), "no gaps, no repeats"
             assert (await session.get(rig.url("/rigshare/api/chat?before=x"))).status in (400, 401)
     run(scenario())
+
+
+def test_apps_and_comfy_file_tabs(run):
+    async def scenario():
+        async with rig_server() as rig:
+            admin = await rig.setup_admin()
+            alice = await rig.add_user("alice", edit=True)
+            h = rig.http
+            await h.post(rig.url(f"/api/userdata/{enc('workflows/users/alice/demo.app.json')}"), data=b"{}", headers=alice)
+            await h.post(rig.url(f"/api/userdata/{enc('workflows/users/alice/plain.json')}"), data=b"{}", headers=alice)
+            listing = await (await h.get(rig.url("/rigshare/api/workspace/list?path=users/alice"), headers=alice)).json()
+            entries = {e["name"]: e for e in listing["entries"]}
+            assert entries["demo"].get("app") is True and "app" not in entries["plain"], "apps named without .app"
+
+            sock = await rig.ws("alice")
+            key = "file:workflows/shared/demo.app.json"
+            await sock.send({"type": "join", "room": key, "name": "demo", "doc": BASE_DOC})
+            await sock.until("room")
+            presence = [m for m in await sock.drain() if m["type"] == "presence"][-1]
+            assert presence["rooms"][0]["app"] is True
+
+            # ComfyUI's own Workflows/Apps tabs are hidden unless an admin turns that off.
+            assert rig.hub.server_info()["hide_comfy_file_tabs"] is True
+            await h.patch(rig.url("/rigshare/api/config"), json={"hide_comfy_file_tabs": False}, headers=admin)
+            assert (await sock.until("server"))["server"]["hide_comfy_file_tabs"] is False
+            await sock.close()
+    run(scenario())