- Refactored console-table tests to build explicit RuntimeHooks and pass them to JsRuntime.run.
- Refactored image coercion tests to pass explicit RuntimeHooks into JsRuntime.displayValue instead of constructor hooks.
- Implemented strict base64 validation and normalization for image `displayValue` payloads in the JS runtime, supporting strict strings, `Uint8Array`, `Buffer`, `ArrayBuffer`, typed-array views, and JSON `Buffer` objects.
- Dropped unrecognized image payloads while emitting a warning and fallback text instead of forwarding malformed data.
- Added tests covering successful coercions and invalid image data rejection paths.