[borealisalastor-byte]

Deleting an advanced parameter updates the visible list but leaves the per-model cache unchanged. Switching to another base model and back therefore restores the deleted parameter.

Update the current supplier/model cache after deletion, matching the existing add/edit handlers. The empty list is cached too, so deleting every parameter stays effective after switching back.

Fixes #1411.

Validation:

• Added two regression tests that execute the component's actual handlers with Vue reactivity. Both fail on the original code and pass after the fix; they cover deleting one/all parameters, model/supplier isolation, and the emitted submission payload.
• 29 relevant tests passed: test_model_parameter_cache, test_execution_error_details, and test_supplier_config.
• Targeted ESLint, Ruff check/format, and npm run build passed.
• Chrome verification using the real Vue form in an isolated local fixture reproduced the original bug. After the fix, deleting one/all parameters survives a model round trip and produces the expected submission payload.

No backend persistence, external LLM, or full deployment validation was performed.