fix: 修复设置单元格格式不生效与表格样式覆盖单元格样式

- SetCellFormat V1/V2/V3：格式解析补厂商 JSON 键映射（FontColor/FontSize/
  BoldAndItalic 位标志/BackgroundColor 带透明度/DigitalFormat.formatstring/
  FontFormat 字体名），纯格式代码（如 0.00）回落为数字格式——此前全部被静默忽略
- ShowTableStyle：行级样式(row.font/fill+commit)在 exceljs 中会覆盖该行
  已设置的单元格样式，改为逐单元格设置表头样式
- 经 18 节点覆盖流程实测：V3 红字宋体加粗、V2 蓝字、V1 数字格式 0.00 均落盘

src/main/capabilities/excel-common.ts

@@ -625,13 +625,13 @@ function toArgb(color: string): string {
   return hex.length === 6 ? "FF" + hex : hex.padStart(8, "F");
 }
 
-function parseFormatSpec(raw: unknown): { bold?: boolean; italic?: boolean; underline?: boolean; fontSize?: number; color?: string; bgColor?: string; numFmt?: string } {
-  if (typeof raw === "object" && raw !== null) return raw as ReturnType<typeof parseFormatSpec>;
+function parseFormatSpec(raw: unknown): { bold?: boolean; italic?: boolean; underline?: boolean; fontSize?: number; color?: string; bgColor?: string; numFmt?: string; fontName?: string } {
+  if (typeof raw === "object" && raw !== null) return normalizeFormatSpec(raw as Record<string, unknown>);
   const text = String(raw ?? "").trim();
   if (!text) return {};
   try {
     const parsed = JSON.parse(text) as Record<string, unknown>;
-    if (typeof parsed === "object" && parsed) return parsed as ReturnType<typeof parseFormatSpec>;
+    if (typeof parsed === "object" && parsed) return normalizeFormatSpec(parsed);
   } catch { /* fall through to keywords */ }
   const spec: ReturnType<typeof parseFormatSpec> = {};
   const lower = text.toLowerCase();
@@ -640,6 +640,26 @@ function parseFormatSpec(raw: unknown): { bold?: boolean; italic?: boolean; unde
   if (/下划线|underline/.test(lower)) spec.underline = true;
   const sizeMatch = text.match(/(\d+)号|font-size[::]\s*(\d+)/i);
   if (sizeMatch) spec.fontSize = Number(sizeMatch[1] || sizeMatch[2]);
+  // 无关键词命中时视为数字格式代码（如 "0.00"、"G/通用格式"、"yyyy-mm-dd"）
+  if (!Object.keys(spec).length) spec.numFmt = text;
+  return spec;
+}
+
+/** 兼容厂商格式 JSON（FontColor/BoldAndItalic/FontSize/BackgroundColor/DigitalFormat）与内部 camelCase 键 */
+function normalizeFormatSpec(parsed: Record<string, unknown>): ReturnType<typeof parseFormatSpec> {
+  const spec: ReturnType<typeof parseFormatSpec> = {};
+  const flags = Number(parsed.BoldAndItalic ?? 0);
+  if (flags & 1) spec.bold = true;
+  if (flags & 2) spec.italic = true;
+  if (parsed.FontFormat) spec.fontName = String(parsed.FontFormat);
+  if (parsed.FontSize !== undefined && parsed.FontSize !== null && String(parsed.FontSize).trim() !== "") spec.fontSize = Number(parsed.FontSize);
+  if (parsed.FontColor) spec.color = String(parsed.FontColor);
+  if (parsed.BackgroundColor) spec.bgColor = String(parsed.BackgroundColor).split(",")[0].trim();
+  const digital = parsed.DigitalFormat as { formatstring?: unknown } | undefined;
+  if (digital?.formatstring && String(digital.formatstring).trim() !== "") spec.numFmt = String(digital.formatstring);
+  for (const key of ["bold", "italic", "underline", "fontSize", "color", "bgColor", "numFmt"] as const) {
+    if (parsed[key] !== undefined) (spec as Record<string, unknown>)[key] = parsed[key];
+  }
   return spec;
 }
 
@@ -670,6 +690,7 @@ registerMany(["Excel_Cs_SetCellFormat", "Excel_Cs_SetCellFormat_V2", "Excel_Cs_S
         italic: spec.italic,
         underline: spec.underline,
         size: spec.fontSize,
+        name: spec.fontName ?? cell.font?.name,
         color: spec.color ? { argb: toArgb(spec.color) } : undefined
       };
     }
@@ -697,11 +718,15 @@ register("Excel_Cs_ExcelFilter", async (ctx, node, args) => {
 register("Excel_Cs_ShowTableStyle", async (ctx, node, args) => {
   const source = await loadWorkbook(args, node.id, node.componentId);
   const sheet = worksheetOf(source.workbook, args);
-  const headerRow = sheet.getRow(1);
-  headerRow.font = { ...headerRow.font, bold: true };
-  headerRow.fill = { type: "pattern", pattern: "solid", fgColor: { argb: "FFD9E8F5" } };
-  headerRow.commit();
-  sheet.autoFilter = { from: { row: 1, column: 1 }, to: { row: Math.max(1, sheet.rowCount), column: Math.max(1, sheet.columnCount) } };
+  // 必须逐单元格设置：exceljs 的行级样式（row.font/row.fill + commit）会覆盖
+  // 该行已设置的单元格样式（如先执行过的设置单元格格式）
+  const lastCol = Math.max(1, sheet.columnCount);
+  for (let c = 1; c <= lastCol; c += 1) {
+    const cell = sheet.getRow(1).getCell(c);
+    cell.font = { ...cell.font, bold: true };
+    cell.fill = { type: "pattern", pattern: "solid", fgColor: { argb: "FFD9E8F5" } };
+  }
+  sheet.autoFilter = { from: { row: 1, column: 1 }, to: { row: Math.max(1, sheet.rowCount), column: lastCol } };
   await saveWhenRequested(source, args, true);
   ctx.log("已应用表格样式（表头加粗 + 筛选）", "info", node.id);
   return { styled: true };