[Bug Report]: rounding error leads to incorrect clicks

[sthoduka]

Version

@ui-tars/action-parser 1.2.3

Issue Type

• Select a issue type 👇
• Agent TARS Web UI (@agent-tars/web-ui)
• Agent TARS CLI (@agent-tars/server)
• Agent TARS Server (@agent-tars/server)
• Agent TARS (@agent-tars/core)
• MCP Agent (@tarko/mcp-agent)
• Agent Kernel (@tarko/agent)
• Other (please specify in description)

Model Provider

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• Volcengine
• Anthropic
• OpenAI
• Azure OpenAI
• Other (please specify in description)

Problem Description

The function smartResizeForV15 returns different results for some sizes compared to the smart_resize function in the Python library, which is also the same function used in the model processor.

The reason is that Javascript performs rounding differently to Python.
Javascript rounds X.5 -> (X+1)
Python rounds X.5 -> (X) if X is even, and (X+1) if X is odd.

Python:

smart_resize(1022, 1522) -> (1008, 1512)

Javascript

smartResizeForV15(1022, 1522) -> (1512, 1036)

In the above example, the difference in h_bar (1008 vs 1036) is enough to miss click coordinates, especially towards the bottom of the page.

Suggested fix: implement own rounding function that behaves like Python. I'm happy to send a PR if that sounds reasonable.

Error Logs

No response