fix(theme): 修复文件导入冲突确认时重复弹出文件选择框的问题，新增导入成功 toast 提示

- ImportThemeResult 新增 file_path 字段，冲突时回传已选文件路径
- 新增 ImportThemeFromFilePath API，确认覆盖直接用缓存路径无需重选文件
- ThemeImportModal 缓存 conflictFilePath，confirmOverwrite 统一管理 loading 状态
- AppearancePage 导入成功后显示 toast 提示

Author: huanfeng

wind_setting/app_theme.go

@@ -22,10 +22,11 @@ type ImportThemeResult struct {
 	ThemeName string `json:"theme_name"`
 	Conflict  bool   `json:"conflict"`
 	ErrorMsg  string `json:"error_msg"`
+	FilePath  string `json:"file_path"` // 文件导入冲突时回传已选路径，供二次确认时直接导入无需重新选择
 }
 
 // ImportThemeFromFile 打开系统文件选择对话框，读取并导入 yaml 主题文件。
-// force=true 时覆盖同名主题。
+// force=true 时覆盖同名主题。冲突时在结果中回传 FilePath，供前端确认覆盖时调用 ImportThemeFromFilePath 无需重新选择文件。
 func (a *App) ImportThemeFromFile(force bool) ImportThemeResult {
 	path, err := wailsRuntime.OpenFileDialog(a.ctx, wailsRuntime.OpenDialogOptions{
 		Title: "选择主题文件",
@@ -45,7 +46,28 @@ func (a *App) ImportThemeFromFile(force bool) ImportThemeResult {
 		return ImportThemeResult{ErrorMsg: "读取文件失败: " + err.Error()}
 	}
 
-	return importThemeFromContent(content, force)
+	result := importThemeFromContent(content, force)
+	if result.Conflict {
+		result.FilePath = path
+	}
+	return result
+}
+
+// ImportThemeFromFilePath 直接使用已知路径导入主题文件，不再打开文件选择对话框。
+// 用于文件导入冲突确认后的二次调用：前端缓存第一次选择的路径，确认覆盖时传入。
+func (a *App) ImportThemeFromFilePath(path string, force bool) ImportThemeResult {
+	if path == "" {
+		return ImportThemeResult{ErrorMsg: "文件路径不能为空"}
+	}
+	content, err := os.ReadFile(path)
+	if err != nil {
+		return ImportThemeResult{ErrorMsg: "读取文件失败: " + err.Error()}
+	}
+	result := importThemeFromContent(content, force)
+	if result.Conflict {
+		result.FilePath = path
+	}
+	return result
 }
 
 // ImportThemeFromURL 从指定 URL 下载并导入 yaml 主题文件。

wind_setting/frontend/src/api/wails.ts

@@ -1003,6 +1003,7 @@ export interface ImportThemeResult {
   theme_name: string;
   conflict: boolean;
   error_msg: string;
+  file_path: string;
 }
 
 export async function importThemeFromFile(
@@ -1013,6 +1014,16 @@ export async function importThemeFromFile(
   ) as ImportThemeResult;
 }
 
+export async function importThemeFromFilePath(
+  path: string,
+  force: boolean,
+): Promise<ImportThemeResult> {
+  return (window as any).go.main.App.ImportThemeFromFilePath(
+    path,
+    force,
+  ) as ImportThemeResult;
+}
+
 export async function importThemeFromText(
   yamlContent: string,
   force: boolean,

wind_setting/frontend/src/components/ThemeImportModal.vue

@@ -25,12 +25,14 @@ const activeTab = ref<Tab>("file");
 const loading = ref(false);
 const errorMsg = ref("");
 const conflictName = ref("");
+const conflictFilePath = ref(""); // 文件导入冲突时缓存已选路径，确认覆盖无需重新选文件
 const yamlText = ref("");
 const urlInput = ref("");
 
 function resetState() {
   errorMsg.value = "";
   conflictName.value = "";
+  conflictFilePath.value = "";
 }
 
 function close() {
@@ -84,25 +86,36 @@ function handleResult(result: wailsApi.ImportThemeResult) {
   }
   if (result.conflict) {
     conflictName.value = result.theme_name;
+    conflictFilePath.value = result.file_path ?? "";
     errorMsg.value = "";
     return;
   }
   errorMsg.value = result.error_msg || "导入失败";
 }
 
 async function confirmOverwrite() {
-  if (activeTab.value === "file") {
-    await handleFileImport(true);
-  } else if (activeTab.value === "text") {
-    await handleTextImport(true);
-  } else {
-    await handleURLImport(true);
+  loading.value = true;
+  errorMsg.value = "";
+  try {
+    let result: wailsApi.ImportThemeResult;
+    if (activeTab.value === "file" && conflictFilePath.value) {
+      result = await wailsApi.importThemeFromFilePath(conflictFilePath.value, true);
+    } else if (activeTab.value === "text") {
+      result = await wailsApi.importThemeFromText(yamlText.value, true);
+    } else {
+      result = await wailsApi.importThemeFromURL(urlInput.value, true);
+    }
+    conflictName.value = "";
+    conflictFilePath.value = "";
+    handleResult(result);
+  } finally {
+    loading.value = false;
   }
-  conflictName.value = "";
 }
 
 function cancelOverwrite() {
   conflictName.value = "";
+  conflictFilePath.value = "";
 }
 
 async function pasteFromClipboard() {

wind_setting/frontend/src/pages/AppearancePage.vue

@@ -44,6 +44,7 @@ import {
   indicatorSchema,
 } from "@/schemas/appearance.schema";
 import type { PageSchema } from "@/schemas/types";
+import { useToast } from "../composables/useToast";
 
 const props = defineProps<{
   formData: Config;
@@ -62,6 +63,8 @@ const emit = defineEmits<{
   themeDeleted: [themeName: string];
 }>();
 
+const { toast } = useToast();
+
 const themeImportOpen = ref(false);
 
 const themeServerRunning = ref(false);
@@ -72,6 +75,7 @@ const themeServerLoading = ref(false);
 function onThemeImported(themeName: string) {
   themeImportOpen.value = false;
   emit("themeImported", themeName);
+  toast(`主题「${themeName}」导入成功`);
 }
 
 const themeSelectOpen = ref(false);