feat: add model deselection functionality in ComboFormModal and ComboDetailPage (#889)

- Implemented handleDeselectModel function to allow users to deselect models in both ComboFormModal and ComboDetailPage.
- Updated ModelSelectModal to handle deselection and visually indicate selected models.
- Enhanced user experience by allowing models to be removed from the selection without closing the modal.

src/app/(dashboard)/dashboard/combos/page.js

@@ -390,6 +390,10 @@ function ComboFormModal({ isOpen, combo, onClose, onSave, activeProviders, kindF
     }
   };
 
+  const handleDeselectModel = (model) => {
+    setModels(models.filter((m) => m !== model.value));
+  };
+
   const handleRemoveModel = (index) => {
     setModels(models.filter((_, i) => i !== index));
   };
@@ -502,10 +506,13 @@ function ComboFormModal({ isOpen, combo, onClose, onSave, activeProviders, kindF
         isOpen={showModelSelect}
         onClose={() => setShowModelSelect(false)}
         onSelect={handleAddModel}
+        onDeselect={handleDeselectModel}
         activeProviders={activeProviders}
         modelAliases={modelAliases}
         title="Add Model to Combo"
         kindFilter={kindFilter}
+        addedModelValues={models}
+        closeOnSelect={false}
       />
     </>
   );