don't use proxy for env

[pelikhan]

better debugging experience

• The promptcontext.ts file has been simplified, replacing the Proxy pattern with the use of Object.freeze() on the vars variable. This makes the env constant immutable, reducing potential side effects.
• In airequesttree.ts, the cache variable in the AIRequestTreeDataProvider class is now readonly. This enforces immutability and prevents unintended modifications.
• The state.ts file has undergone significant refactoring:
  • The snapshotAIRequestKey and getAIRequestCache functions are removed from the global scope.
  • The snapshotAIRequestKey function is now a private method of the ExtensionState class, encapsulating its functionality within this class.
  • The getAIRequestCache function's functionality is now executed in the ExtensionState class constructor, encapsulating the initialization of this._aiRequestCache.
  • The call to snapshotAIRequestKey in the sendAIRequest method is updated to use the class method.
  • A new parameter, prj, is added to the snapshotAIRequestKey method, but it's currently not being used. This might be a setup for future changes.
• Overall, these changes aim to improve the code organization, encapsulation, and immutability, which are key principles in clean, maintainable code. 📝💻🔒

generated by pr-describe

[github-actions[bot]]

The code changes in the pull request mainly consist of refactoring and optimization tasks. The significant changes are as follows:

1. In promptcontext.ts, the use of Proxy for env has been replaced with Object.freeze(). It seems like a simplification, but it also removes an error trace that was provided when accessing undefined properties of the env object. This could potentially lead to silent failures if undefined properties are accessed.

2. In airequesttree.ts, the cache property has been made readonly. This prevents accidental modifications to the cache, which can improve code safety.

3. In state.ts, the function snapshotAIRequestKey has been removed from the global scope and added as a private method in the ExtensionState class. This encapsulates the function and reduces the global namespace pollution. The same has been done with the cache initialization.

Here are a few concerns:

• In promptcontext.ts, the error tracing is removed when accessing undefined properties of the env object. This might lead to silent failures when undefined properties are accessed in the future.

• In state.ts, the snapshot key generation for the AI request has been changed, specifically the part of creating the hash for the template. The options.template itself is being stringified inside another object for hashing now. If the previous hash generation was used anywhere else for comparison, it would fail now.

Overall, the code looks good, but I would recommend considering these concerns for the sake of robustness. If they are non-issues given the context, then Looks Good To Me (LGTM) :rocket:.

generated by pr-review