fix：application state getters cannot be rendered

[lichunn]

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PR

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PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

Background and solution

问题现状：
1.节点绑定全局状态state，设置循环渲染，画布不会正常渲染
2.节点绑定全局状态getter，画布不会正常渲染

What is the current behavior?

问题1：

问题2：

What is the new behavior?

当前getter执行时this指向不正确，并且store不是响应式的；所以调整了getter的this指向，使用reactive和computed确保数据响应性
修复后渲染效果如下：

Does this PR introduce a breaking change?

• Yes
• No

Other information

Summary by CodeRabbit

• Improvements
  • Enhanced global state management for improved reliability and reactivity.
  • Getters are now more robust and provide better error handling, resulting in a more stable user experience.

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Walkthrough

The useGlobalState function in the global state management module was refactored to improve the creation and handling of reactive state stores and their computed getters. The new implementation provides a more robust, reactive, and error-tolerant mechanism for defining and accessing global state and computed properties.

Changes

Cohort / File(s)	Change Summary
Global State Store Refactor packages/canvas/render/src/application-function/global-state.ts	Refactored useGlobalState to create fully reactive state objects and computed getters using Vue reactivity, replacing direct string evaluation with dynamic function construction and improved error handling.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

In the warren of code, a new state takes its place,
With reactivity woven—each getter with grace.
Computed and cautious, with errors well caught,
Our global store’s smarter than ever we thought.
A hop and a skip, the bugs are outwitted—
By rabbits, this upgrade is warmly admitted! 🐇✨

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📥 Commits

Reviewing files that changed from the base of the PR and between ac6db97 and 54d21a1.

📒 Files selected for processing (1)

• packages/canvas/render/src/application-function/global-state.ts (1 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

• packages/canvas/render/src/application-function/global-state.ts

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