fix(oocana): extract _wrap_output_with_warning to reduce duplication

[leavesster]

Summary

• Extract _wrap_output_with_warning() method to handle output wrapping with error handling
• Reduce duplicate try/except blocks in output(), outputs(), and finish() methods

Problem

Three methods had identical try/except patterns:

try:
    wrap_value = self.__wrap_output_value(key, value)
except (ValueError, IOError) as e:
    self.send_warning(f"{e}")
    return

Solution

Extracted to a single helper method that returns (wrapped_value, success) tuple.

Test Plan

• All existing tests pass
• Context tests verify output/outputs behavior

[coderabbitai]

演进概览

在 context.py 中引入新的辅助方法 _wrap_output_with_warning，用于包装输出值并处理异常。该方法替代了 output 和 outputs 中对 __wrap_output_value 的直接调用，整合错误处理逻辑并消除重复的 try/except 块。

变更

内聚组 / 文件	摘要
错误处理重构 oocana/oocana/context.py	新增 _wrap_output_with_warning 辅助方法，在 output 和 outputs 方法中统一错误处理流程，移除重复的 try/except 块，简化异常路径。

预估代码审查工作量

🎯 2 (简单) | ⏱️ ~10 分钟

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description check	✅ Passed	The pull request description is directly related to the changeset, providing a clear summary of the extracted method, the problem it solves, the solution implemented, and the test plan.
Title check	✅ Passed	The title follows the required format <type>(<scope>): <subject> with 'fix' as type, 'oocana' as scope, and a clear subject describing the main change (extracting helper method to reduce duplication).

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[Copilot]

Pull request overview

This PR extracts duplicate try/except error handling patterns from the output() and outputs() methods into a reusable helper method _wrap_output_with_warning() to reduce code duplication.

Changes:

• Added new helper method _wrap_output_with_warning() that wraps output values with error handling and returns a success tuple
• Refactored output() method to use the new helper method instead of inline try/except blocks
• Refactored outputs() method to use the new helper method instead of inline try/except blocks
• Minor code cleanup including whitespace fixes and type annotation improvements

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[Copilot]

For consistency with other helper methods in the Context class (such as __wrap_output_value, __is_basic_type, __store_ref, __dataframe, __matplotlib), this method should use double underscores (__wrap_output_with_warning) rather than a single underscore to indicate it's a private method.

[Copilot]

The PR description mentions that three methods (output, outputs, and finish) had identical try/except patterns that should be refactored. However, the finish() method at lines 514-523 still contains the duplicate try/except pattern and was not updated to use the new _wrap_output_with_warning() helper method. This method should also be refactored for consistency.