fix: 文件选择对话框过滤器按字段上下文智能匹配

- 原先所有文件选择框都写死 Excel 过滤器, 选图片/PDF/Word 等均显示 Excel 类型, 且无法直接看到目标文件
- 现按 字段键/标签关键词 + 组件类别 推导: Excel/Word/PDF/图片/压缩/音频/视频/JSON 各归其类, 均附带「全部文件」兜底
- 无法识别的字段退回「全部文件」; 目录选择不受影响

src/renderer/src/panels/Properties.tsx

@@ -438,6 +438,49 @@ function PropertyTab({
   );
 }
 
+interface FileFilterOption {
+  name: string;
+  extensions: string[];
+}
+
+/**
+ * 按组件与字段上下文推导文件选择对话框的类型过滤器。
+ * 先匹配字段本身的含义（字段键/标签），再匹配组件类别；无法识别时退回「全部文件」。
+ */
+function fileFiltersFor(componentId: string, field: CatalogField): FileFilterOption[] {
+  const haystack = `${componentId} ${field.key} ${field.label ?? ""}`;
+  const filters: FileFilterOption[] = [];
+  if (/excel|bivartable|databook|工作簿|表格/i.test(haystack)) {
+    filters.push({ name: "Excel 表格", extensions: ["xlsx", "xlsm", "xls", "csv"] });
+  }
+  if (/word|文档/i.test(haystack)) {
+    filters.push({ name: "Word 文档", extensions: ["docx", "doc"] });
+  }
+  if (/pdf/i.test(haystack)) {
+    filters.push({ name: "PDF 文档", extensions: ["pdf"] });
+  }
+  if (/image|ocr|CV_|vision|图片|图像|截图|模板|照片/i.test(haystack)) {
+    filters.push({ name: "图片文件", extensions: ["png", "jpg", "jpeg", "bmp", "gif", "webp"] });
+  }
+  if (/zip|compress|archive|压缩/i.test(haystack)) {
+    filters.push({ name: "压缩文件", extensions: ["zip", "rar", "7z", "gz"] });
+  }
+  if (/audio|speech|音频|语音|录音/i.test(haystack)) {
+    filters.push({ name: "音频文件", extensions: ["wav", "mp3", "flac", "ogg"] });
+  }
+  if (/video|视频/i.test(haystack)) {
+    filters.push({ name: "视频文件", extensions: ["mp4", "avi", "mkv", "mov"] });
+  }
+  if (/json/i.test(haystack)) {
+    filters.push({ name: "JSON 文件", extensions: ["json"] });
+  }
+  if (!filters.length) {
+    return [{ name: "全部文件", extensions: ["*"] }];
+  }
+  filters.push({ name: "全部文件", extensions: ["*"] });
+  return filters;
+}
+
 function FieldControl({
   field,
   node,
@@ -486,12 +529,7 @@ function FieldControl({
       const selected = await window.rpa.dialog.open({
         title: field.label,
         directories,
-        filters: directories
-          ? undefined
-          : [
-              { name: "Excel", extensions: ["xlsx", "xlsm", "xls"] },
-              { name: "全部文件", extensions: ["*"] }
-            ]
+        filters: directories ? undefined : fileFiltersFor(node.componentId, field)
       });
       if (selected) onChange(field.key, selected);
     } catch (error) {