feat(rsc): validate inline action lexical expressions#1260
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Extracted from #1246.
Hoisting a directive function changes the meaning of lexical
this,super, andarguments. Custom directives that require semantic preservation need a transform-level way to reject these expressions.This adds opt-in validation scoped to the transformed function, skips nested function scopes, and allows the JSX dev helper source-metadata
thisargument. Tests cover every rejected expression and both exceptions.