refactor: 数据处理向导拆分组合式函数与子面板

提取 useDataProcessDraft、useDataProcessGeneration 与 dataProcessCreateState 管理向导状态，新增 StructuredOptionsPanel、UnstructuredOptionsPanel、DatasetSplitEditor 子面板组件，样式抽离为独立 scss，DataProcessCreateView 与 TaskSetupStep 大幅瘦身，回归脚本适配。

frontend/src/views/data-process/create/dataProcessCreateState.ts

@@ -0,0 +1,54 @@
+import type { StructuredProcessOptions, UnstructuredProcessOptions } from './types'
+
+export const DEFAULT_GENERATION_PROMPT = '你是一名专业的数据生成助手。请根据输入内容生成准确、完整、可直接用于模型训练的问答数据。仅输出符合目标格式的内容，答案应事实清晰、语言自然，不要添加分析过程、说明或无关内容。'
+
+export function createDefaultStructuredOptions(): StructuredProcessOptions {
+  return {
+    preprocessOptions: ['clean_invalid', 'detect_structure', 'deduplicate', 'normalize_format'],
+    semanticEnrichment: false,
+    qaPairsPerRow: 1,
+    datasetSplit: { train: 80, validation: 10, test: 10 },
+    generationModelId: '',
+    generationPrompt: DEFAULT_GENERATION_PROMPT,
+    temperature: 0.7,
+    maxTokens: 1024,
+    jsonMode: false,
+    qualityFilterEnabled: false,
+    filterLowQuality: true,
+    filterShortContent: true,
+    minOutputLength: 20,
+  }
+}
+
+export function createDefaultUnstructuredOptions(): UnstructuredProcessOptions {
+  return {
+    preprocessOptions: [
+      'clean_invalid_content',
+      'detect_document_structure',
+      'merge_short_content',
+      'filter_low_quality',
+      'deduplicate_content',
+      'preserve_context',
+    ],
+    chunkMethod: 'semantic',
+    chunkSize: 800,
+    chunkOverlap: 100,
+    minChunkSize: 100,
+    customDelimiter: '',
+    preserveTables: true,
+    preserveCodeBlocks: true,
+    preserveLists: true,
+    semanticEnrichment: false,
+    qaPairsPerChunk: 1,
+    datasetSplit: { train: 80, validation: 10, test: 10 },
+    generationModelId: '',
+    generationPrompt: DEFAULT_GENERATION_PROMPT,
+    temperature: 0.7,
+    maxTokens: 1024,
+    jsonMode: false,
+    qualityFilterEnabled: false,
+    filterLowQuality: true,
+    filterShortContent: true,
+    minOutputLength: 20,
+  }
+}