feat(nvtx): add UI viewport contracts

Cargo.toml

@@ -30,6 +30,7 @@ members = [
     "integrations/nvtx/bridge",
     "integrations/nvtx/example",
     "integrations/nvtx/analyzer",
+    "integrations/nvtx/ui",
     # Domain-specific crates
     "domains/query_engine/analyzer",
     "domains/query_engine/model",

deny.toml

@@ -17,6 +17,10 @@ ignore = [
     # to quick-xml >= 0.41.
     "RUSTSEC-2026-0194",
     "RUSTSEC-2026-0195",
+    # smartstring is unmaintained and has no safe upgrade. It is pulled in only
+    # by ts-rs's TypeScript formatting toolchain (dprint -> SWC), not by shipped
+    # runtime code. Drop once ts-rs/dprint migrate to a maintained string crate.
+    "RUSTSEC-2026-0249",
 ]
 
 [licenses]

integrations/nvtx/ui/Cargo.toml

@@ -0,0 +1,21 @@
+# SPDX-FileCopyrightText: Copyright (c) 2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+[package]
+name = "nvtx-ui"
+version.workspace = true
+edition.workspace = true
+publish.workspace = true
+
+[dependencies]
+nvtx-analyzer = { path = "../analyzer" }
+quent-time = { path = "../../../crates/time" }
+serde.workspace = true
+ts-rs.workspace = true
+
+[dev-dependencies]
+nvtx-bridge = { path = "../bridge" }
+nvtx-events = { path = "../events" }
+quent-events = { path = "../../../crates/events" }
+serde_json.workspace = true
+uuid.workspace = true