feat: add Flutter schema-driven form cards

mobile/lib/core/forms/schema/form_schema.dart

@@ -0,0 +1,92 @@
+enum JsonValueType { string, number, boolean }
+
+enum FormControlType { text, textArea, select, dateTime }
+
+class DynamicFormDefinition {
+  const DynamicFormDefinition({
+    required this.dataSchema,
+    required this.uiSchema,
+  });
+
+  final JsonFormSchema dataSchema;
+  final FormUiSchema uiSchema;
+}
+
+class JsonFormSchema {
+  const JsonFormSchema({
+    required this.id,
+    required this.title,
+    required this.properties,
+    this.required = const {},
+  });
+
+  final String id;
+  final String title;
+  final Map<String, JsonFieldSchema> properties;
+  final Set<String> required;
+}
+
+class JsonFieldSchema {
+  const JsonFieldSchema({
+    required this.type,
+    this.format,
+    this.enumValues = const [],
+    this.minLength,
+    this.maxLength,
+  });
+
+  final JsonValueType type;
+  final String? format;
+  final List<String> enumValues;
+  final int? minLength;
+  final int? maxLength;
+}
+
+class FormUiSchema {
+  const FormUiSchema({required this.description, required this.sections});
+
+  final String description;
+  final List<FormSectionSchema> sections;
+}
+
+class FormSectionSchema {
+  const FormSectionSchema({required this.title, required this.controls});
+
+  final String title;
+  final List<FormControlSchema> controls;
+}
+
+class FormControlSchema {
+  const FormControlSchema({
+    required this.field,
+    required this.label,
+    required this.control,
+    this.placeholder,
+    this.helperText,
+    this.optionLabels = const {},
+  });
+
+  final String field;
+  final String label;
+  final FormControlType control;
+  final String? placeholder;
+  final String? helperText;
+  final Map<String, String> optionLabels;
+}
+
+class DynamicFormState {
+  const DynamicFormState({this.values = const {}, this.errors = const {}});
+
+  final Map<String, Object?> values;
+  final Map<String, String> errors;
+
+  DynamicFormState copyWith({
+    Map<String, Object?>? values,
+    Map<String, String>? errors,
+  }) {
+    return DynamicFormState(
+      values: values ?? this.values,
+      errors: errors ?? this.errors,
+    );
+  }
+}

mobile/lib/core/forms/schema/form_validator.dart

@@ -0,0 +1,30 @@
+import 'package:aioa_mobile/core/forms/schema/form_schema.dart';
+
+Map<String, String> validateDynamicForm(
+  JsonFormSchema schema,
+  Map<String, Object?> values,
+) {
+  final errors = <String, String>{};
+  for (final entry in schema.properties.entries) {
+    final key = entry.key;
+    final value = values[key];
+    final field = entry.value;
+    final empty = value == null || (value is String && value.trim().isEmpty);
+    if (schema.required.contains(key) && empty) {
+      errors[key] = '此项为必填项';
+      continue;
+    }
+    if (empty) continue;
+    if (value is String) {
+      if (field.minLength != null && value.trim().length < field.minLength!) {
+        errors[key] = '至少输入 ${field.minLength} 个字符';
+      } else if (field.maxLength != null && value.length > field.maxLength!) {
+        errors[key] = '最多输入 ${field.maxLength} 个字符';
+      } else if (field.enumValues.isNotEmpty &&
+          !field.enumValues.contains(value)) {
+        errors[key] = '选项无效';
+      }
+    }
+  }
+  return errors;
+}