Use WeakMap for curly component capturedArgs instead of symbol-keyed instance properties

[Copilot]

Removes prototype-deopt-inducing symbol-keyed property assignments on curly component instances by moving capturedArgs storage into a WeakMap.

Changes

• curly.ts

  • Removed unused ARGS and HAS_BLOCK symbol exports
  • Added module-private COMPONENT_ARGS_MAP: WeakMap<object, CapturedArguments['named']> to store args per component instance
  • Exported getComponentCapturedArgs(component) for consumers to look up args
  • After ComponentClass.create(props), registers the instance: COMPONENT_ARGS_MAP.set(component, capturedArgs)

• component.ts

  • PROPERTY_DID_CHANGE now calls getComponentCapturedArgs(this) instead of reading (this as any)[ARGS]
  • Removed stale ARGS import

Before / After

// Before: symbol-keyed property set directly on component instance
props[ARGS] = capturedArgs;
let component = ComponentClass.create(props);
// …
let args = (this as any)[ARGS]; // in PROPERTY_DID_CHANGE

// After: WeakMap, no instance pollution
let component = ComponentClass.create(props);
COMPONENT_ARGS_MAP.set(component, capturedArgs);
// …
let args = getComponentCapturedArgs(this); // in PROPERTY_DID_CHANGE

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