fix(forms): cleanup dynamically removed form fields

packages/core/src/baseeditableholder/BaseEditableHolder.vue

@@ -86,6 +86,12 @@ export default {
         }
     },
     formField: {},
+    beforeUnmount() {
+        // PATCHED: unregister field and clear form state on unmount
+        if (this.$formName) {
+            this.$pcForm?.unregister?.(this.$formName)
+        }
+    },
     methods: {
         writeValue(value, event) {
             if (this.controlled) {

packages/forms/src/form/Form.vue

@@ -46,6 +46,7 @@ export default {
             submit,
             register,
             onSubmit,
+            unregister: $form.unregister, // PATCHED: expose unregister method to child form components
             onReset,
             ...omit($form, ['handleSubmit', 'handleReset'])
         };

packages/forms/src/useform/index.js

@@ -240,6 +240,15 @@ export const useForm = (options = {}) => {
         if (_states[field] !== undefined) _states[field].value = value;
     };
 
+    const unregister = (field)  => {
+        // PATCHED: remove field state and stop reactive watchers
+        if (fields[field]) {
+            fields[field]._watcher.stop();
+            delete fields[field];
+        }
+        delete _states[field];
+    };
+
     const getFieldState = (field) => {
         return fields[field]?.states;
     };
@@ -257,6 +266,7 @@ export const useForm = (options = {}) => {
     return {
         defineField,
         setFieldValue,
+        unregister,
         getFieldState,
         handleSubmit,
         handleReset,