Add a new POST /model_linker/loaded API that analyzes a workflow JSON to extract all referenced models (including URNs, embedded node.properties.models and Lora strength extraction) and returns a structured list of loaded models. Update the LinkerManagerDialog UI: add tabs (Missing Models / Loaded Models), styles for the loaded models view, tab switching logic, and new functions to load and render loaded models grouped by category with copy buttons and a consolidated copy-all string. Also hide download/auto-resolve controls when viewing the Loaded Models tab and adjust header layout to accommodate the tabs. Error handling and logging were added for robust API behavior.