refactor: remove default_install_dir, Update uses built-in default path

backend/internal/model/models.go

@@ -229,7 +229,6 @@ type Version struct {
 	EntryFile           string         `gorm:"size:255" json:"entry_file"`
 	EntryFiles          string         `gorm:"type:text" json:"entry_files"`                       // JSON数组，可启动的入口文件
 	DesktopShortcutFiles string        `gorm:"type:text" json:"desktop_shortcut_files"`            // JSON数组，需要创建桌面快捷方式的文件
-	DefaultInstallDir   string         `gorm:"size:500" json:"default_install_dir"`                // 默认安装目录
 	UpdateStrategy      string         `gorm:"size:20;default:optional" json:"update_strategy"`
 	UpdateType          string         `gorm:"size:20;default:full" json:"update_type"`
 	UpdateMethod        string         `gorm:"size:20;default:auto" json:"update_method"`

backend/internal/router/admin/versions.go

@@ -256,7 +256,6 @@ func handleGetVersionByID(c *gin.Context) {
 		"entry_file":              version.EntryFile,
 		"entry_files":             version.EntryFiles,
 		"desktop_shortcut_files":  version.DesktopShortcutFiles,
-		"default_install_dir":     version.DefaultInstallDir,
 		"full_package_path":       version.FullPackagePath,
 		"full_package_size":       version.FullPackageSize,
 		"full_package_hash":       version.FullPackageHash,
@@ -275,7 +274,6 @@ type CreateVersionRequest struct {
 	EntryFile             string             `json:"entry_file"`
 	EntryFiles            string             `json:"entry_files"`
 	DesktopShortcutFiles  string             `json:"desktop_shortcut_files"`
-	DefaultInstallDir     string             `json:"default_install_dir"`
 	UpdateStrategy        string             `json:"update_strategy"`
 	UpdateType            string             `json:"update_type"`
 	UpdateMethod          string             `json:"update_method"`
@@ -330,7 +328,6 @@ func handleCreateVersionGlobal(c *gin.Context) {
 		EntryFile:             req.EntryFile,
 		EntryFiles:            req.EntryFiles,
 		DesktopShortcutFiles:  req.DesktopShortcutFiles,
-		DefaultInstallDir:     req.DefaultInstallDir,
 		UpdateStrategy:        req.UpdateStrategy,
 		UpdateType:            req.UpdateType,
 		UpdateMethod:          req.UpdateMethod,
@@ -475,7 +472,6 @@ type UpdateVersionRequest struct {
 	EntryFile             string             `json:"entry_file"`
 	EntryFiles            string             `json:"entry_files"`
 	DesktopShortcutFiles  string             `json:"desktop_shortcut_files"`
-	DefaultInstallDir     string             `json:"default_install_dir"`
 	UpdateStrategy        string             `json:"update_strategy"`
 	UpdateType            string             `json:"update_type"`
 	UpdateMethod          string             `json:"update_method"`
@@ -543,7 +539,6 @@ func handleUpdateVersionGlobal(c *gin.Context) {
 	updates["entry_file"] = req.EntryFile
 	updates["entry_files"] = req.EntryFiles
 	updates["desktop_shortcut_files"] = req.DesktopShortcutFiles
-	updates["default_install_dir"] = req.DefaultInstallDir
 	if req.UpdateStrategy != "" {
 		updates["update_strategy"] = req.UpdateStrategy
 	}

backend/internal/router/app/info.go

@@ -122,8 +122,7 @@ func handleAppCheckUpdate(c *gin.Context) {
 			"entry_file":             latestVersion.EntryFile,
 			"entry_files":            latestVersion.EntryFiles,
 			"desktop_shortcut_files": latestVersion.DesktopShortcutFiles,
-			"default_install_dir":    latestVersion.DefaultInstallDir,
+			"update_notes":            latestVersion.Description,
-			"update_notes":           latestVersion.Description,
 			"update_strategy":        latestVersion.UpdateStrategy,
 			"update_type":            latestVersion.UpdateType,
 			"update_method":          latestVersion.UpdateMethod,

frontend/src/pages/admin/versions/[id].vue

@@ -55,7 +55,6 @@ const formData = ref({
   entry_file: '',
   entry_files: [] as string[],
   desktop_shortcut_files: [] as string[],
-  default_install_dir: '',
   file: null as File | null,
   base_version_id: '' as string,
 })
@@ -67,16 +66,6 @@ const selectedApplication = computed(() => {
   return applications.value.find(app => String(app.id) === formData.value.application_id)
 })
 
-// 当应用选择变化时，自动设置默认安装目录
-watch(
-  () => selectedApplication.value,
-  (app) => {
-    if (app && !formData.value.default_install_dir) {
-      formData.value.default_install_dir = `C:\\Program Files\\${app.name}`
-    }
-  }
-)
-
 const baseVersionFiles = ref<VersionFileInfo[]>([])
 
 const mergedFiles = computed(() => {
@@ -155,7 +144,6 @@ async function fetchVersion() {
       formData.value.changelog = ver.changelog || ''
       formData.value.entry_file = ver.entry_file || ''
       formData.value.base_version_id = ver.base_version_id ? String(ver.base_version_id) : ''
-      formData.value.default_install_dir = ver.default_install_dir || ''
       // 解析 entry_files JSON
       try {
         formData.value.entry_files = ver.entry_files ? JSON.parse(ver.entry_files) : []
@@ -379,7 +367,6 @@ async function handleSubmit() {
       entry_file: formData.value.entry_file,
       entry_files: JSON.stringify(formData.value.entry_files),
       desktop_shortcut_files: JSON.stringify(formData.value.desktop_shortcut_files),
-      default_install_dir: formData.value.default_install_dir,
     }
 
     // 如果是补丁版本，添加基础版本ID
@@ -692,20 +679,6 @@ onMounted(() => {
                 </div>
               </div>
 
-              <!-- 安装选项 -->
-              <div class="space-y-4 rounded-lg border p-4">
-                <h4 class="font-medium">{{ t('admin.versions.createForm.installOptions') }}</h4>
-
-                <div class="space-y-2">
-                  <UiLabel class="text-sm">{{ t('admin.versions.createForm.defaultInstallDir') }}</UiLabel>
-                  <UiInput
-                    v-model="formData.default_install_dir"
-                    :placeholder="t('admin.versions.createForm.defaultInstallDirPlaceholder')"
-                    :disabled="saving"
-                  />
-                </div>
-              </div>
-
               <div class="flex items-center justify-between rounded-lg border p-4">
                 <div class="space-y-0.5">
                   <UiLabel class="text-base">

frontend/src/pages/admin/versions/create.vue

@@ -54,7 +54,6 @@ const formData = ref({
   entry_file: '',
   entry_files: [] as string[],
   desktop_shortcut_files: [] as string[],
-  default_install_dir: '',
   file: null as File | null,
   base_version_id: '' as string,
 })
@@ -66,16 +65,6 @@ const selectedApplication = computed(() => {
   return applications.value.find(app => String(app.id) === formData.value.application_id)
 })
 
-// 当应用选择变化时，自动设置默认安装目录
-watch(
-  () => selectedApplication.value,
-  (app) => {
-    if (app && !formData.value.default_install_dir) {
-      formData.value.default_install_dir = `C:\\Program Files\\${app.name}`
-    }
-  }
-)
-
 const baseVersionFiles = ref<VersionFileInfo[]>([])
 
 const mergedFiles = computed(() => {
@@ -346,7 +335,6 @@ async function handleSubmit() {
       entry_file: formData.value.entry_file,
       entry_files: JSON.stringify(formData.value.entry_files),
       desktop_shortcut_files: JSON.stringify(formData.value.desktop_shortcut_files),
-      default_install_dir: formData.value.default_install_dir,
       file_path: uploadedData.value.file_path,
       file_size: uploadedData.value.file_size,
       file_hash: uploadedData.value.file_hash,
@@ -614,19 +602,6 @@ onMounted(() => {
               </div>
 
               <!-- 安装选项 -->
-              <div class="space-y-4 rounded-lg border p-4">
-                <h4 class="font-medium">{{ t('admin.versions.createForm.installOptions') }}</h4>
-
-                <div class="space-y-2">
-                  <UiLabel class="text-sm">{{ t('admin.versions.createForm.defaultInstallDir') }}</UiLabel>
-                  <UiInput
-                    v-model="formData.default_install_dir"
-                    :placeholder="t('admin.versions.createForm.defaultInstallDirPlaceholder')"
-                    :disabled="saving"
-                  />
-                </div>
-              </div>
-
               <div class="flex items-center justify-between rounded-lg border p-4">
                 <div class="space-y-0.5">
                   <UiLabel class="text-base">