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8cc412a91c
When parsing TypeScript code with invalid `declare` syntax like
`declare{}`, `declare{}_=>_`, or `declare {};()=>{};`, the parser
would create invalid AST structures that caused "Scope mismatch while
visiting" panics during the visit pass.
The issue was that `declare` must be followed by a valid declaration
keyword (class, function, var, const, let, enum, namespace, module,
interface, type, abstract, async, or global), but the parser wasn't
validating this. When followed by invalid tokens like `{`, the parser
would create `.block` scopes that didn't match the expected scope
types for subsequent constructs like arrow functions.
This fix adds validation to ensure `declare` is only followed by valid
declaration keywords, reporting a proper syntax error for invalid cases
instead of crashing with a scope mismatch panic.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>