## Summary
- allow `eval` and `arguments` as direct bindings in ambient declarations
- continue reporting strict-mode errors for destructured ambient bindings
- add focused coverage for declared functions, classes, object patterns, and array patterns
## Why
The semantic checker previously identified allowed bindings by walking to a `TSDeclareFunction`. That missed other ambient declarations, including declared class constructors and methods, and produced diagnostics for TypeScript cases that require no runtime code generation.
The check now uses the existing ambient-context state and rejects only destructuring binding shapes.
camc314