Add Vue String widget and multiline textarea widgets (#4112)

src/components/graph/widgets/StringWidget.vue

@@ -0,0 +1,45 @@
+<template>
+  <div class="w-full px-2">
+    <!-- Single line text input -->
+    <InputText
+      v-if="!isMultiline"
+      v-model="modelValue"
+      :placeholder="placeholder"
+      class="w-full rounded-lg px-3 py-2 text-sm"
+    />
+
+    <!-- Multi-line textarea -->
+    <Textarea
+      v-else
+      v-model="modelValue"
+      :placeholder="placeholder"
+      :auto-resize="true"
+      :rows="3"
+      class="w-full rounded-lg px-3 py-2 text-sm resize-none"
+    />
+  </div>
+</template>
+
+<script setup lang="ts">
+import InputText from 'primevue/inputtext'
+import Textarea from 'primevue/textarea'
+import { computed } from 'vue'
+
+import type { StringInputSpec } from '@/schemas/nodeDef/nodeDefSchemaV2'
+import type { ComponentWidget } from '@/scripts/domWidget'
+
+const modelValue = defineModel<string>({ required: true })
+const { widget } = defineProps<{
+  widget: ComponentWidget<string>
+}>()
+
+const inputSpec = widget.inputSpec as StringInputSpec
+const isMultiline = computed(() => inputSpec.multiline === true)
+const placeholder = computed(
+  () =>
+    inputSpec.placeholder ??
+    inputSpec.default ??
+    inputSpec.defaultVal ??
+    inputSpec.name
+)
+</script>