feat(import): add SQL script import with dialect-aware parsing

apps/desktop/src/lib/table/tableImport.ts

@@ -86,6 +86,7 @@ export interface TableImportParseSettings {
   emptyStringAsNull: boolean;
   sheetName?: string;
   jsonShape: TableImportJsonShape;
+  databaseType?: DatabaseType | null;
 }
 
 export function defaultTableImportEmptyStringAsNull(format: TableImportSourceFormat): boolean {
@@ -94,9 +95,11 @@ export function defaultTableImportEmptyStringAsNull(format: TableImportSourceFor
 
 export function buildTableImportParseOptions(settings: TableImportParseSettings): TableImportParseOptions {
   const isDelimited = settings.format === "csv" || settings.format === "tsv" || settings.format === "delimited";
+  // SQL 脚本与分隔文本一样是纯文本源，需要传递编码供后端解码（支持 GBK 等常见转储编码）
+  const isTextSource = isDelimited || settings.format === "sql";
   return {
     delimiter: settings.format === "tsv" ? "\\t" : settings.format === "csv" ? "," : settings.delimiter,
-    encoding: isDelimited ? settings.textEncoding : null,
+    encoding: isTextSource ? settings.textEncoding : null,
     titleRow: settings.titleRow,
     dataStartRow: settings.dataStartRow,
     lastDataRow: settings.lastDataRow,
@@ -104,6 +107,8 @@ export function buildTableImportParseOptions(settings: TableImportParseSettings)
     emptyStringAsNull: settings.emptyStringAsNull,
     sheetName: settings.format === "excel" ? settings.sheetName || null : null,
     jsonShape: settings.format === "json" ? settings.jsonShape : null,
+    // SQL 脚本需要按源方言解析字符串转义与标识符大小写（取目标连接的数据库类型）
+    sqlDialect: settings.format === "sql" ? (settings.databaseType ?? null) : null,
   };
 }