Token demo rejects token-standard-v2 LocalNet as unsupported

[zheli]

Environment

• Canton DevKit build: dev (8426d96)
• LocalNet: ui-preview-312-20260813
• Splice: token-standard-v2 with --profile tokens-v2
• Route: http://127.0.0.1:7777/tokens?instance=ui-preview-312-20260813

Steps

1. Start a LocalNet with localnet up ui-preview-312-20260813 --version token-standard-v2 --profile tokens-v2.
2. Open Tokens in the dashboard and select the instance.
3. Select Launch demo.

Observed

The dashboard displays: This action needs a running Splice 0.6.11 or newer LocalNet. The UI request POST /api/tokens/demo?instance=ui-preview-312-20260813 returns HTTP 412 with code NEEDS_V2_LOCALNET.

Expected

The curated token-standard-v2 image with tokens-v2 profile should be accepted as a V2-capable LocalNet, or the CLI should not present it as suitable for V2 flows.

Screenshot artifact: artifacts/chrome-devtools/token-standard-v2-demo-version-rejection.png.

[zheli]

Additional verification: recreating the same named LocalNet with curated --version 0.6.12 also returned HTTP 412 NEEDS_V2_LOCALNET from the same UI action, although the dashboard and error text instruct operators to use 0.6.12. The instance reported running and all required services healthy before the action.