fix: stabilize web registration and asset loading

scenes/ui/SettingsPanel.gd

@@ -14,6 +14,7 @@ const ICON_SCRIPT: Script = preload("res://scenes/ui/SettingsPanelIcon.gd")
 const TOGGLE_SCRIPT: Script = preload("res://scenes/ui/SettingsToggle.gd")
 const SLIDER_SCRIPT: Script = preload("res://scenes/ui/SettingsSlider.gd")
 const BADGE_TEXTURE_PATH: String = "res://assets/ui/settings/settings_whale_badge_asset_v1.png"
+const WebFilePicker = preload("res://_Core/utils/WebFilePicker.gd")
 
 const TEXT_COLOR: Color = Color(0.188, 0.294, 0.424)
 const MUTED_COLOR: Color = Color(0.560, 0.639, 0.733)
@@ -22,6 +23,7 @@ const SOFT_BLUE: Color = Color(0.918, 0.961, 0.992, 0.92)
 const DANGER_COLOR: Color = Color(0.894, 0.392, 0.357)
 const MOVEMENT_ACTIONS: Array[String] = ["move_left", "move_right", "move_up", "move_down"]
 const AVATAR_NATIVE_FILE_FILTERS: Array[String] = ["*.png,*.jpg,*.jpeg,*.webp"]
+const WEB_FILE_MAX_BYTES: int = 8 * 1024 * 1024
 
 const CATEGORIES: Array[Dictionary] = [
 	{"id": "basic", "label": "基础", "icon": "basic"},
@@ -71,6 +73,7 @@ var _savedSettings: Dictionary = DEFAULT_SETTINGS.duplicate(true)
 var _isOpen: bool = false
 var _transitionTween: Tween
 var _avatarUploadPending: bool = false
+var _webFilePicker: RefCounted = WebFilePicker.new()
 
 func _ready() -> void:
 	visible = false
@@ -976,6 +979,9 @@ func _on_reconnect_pressed() -> void:
 		_statusLabel.text = "已请求重新连接聊天服务"
 
 func _on_upload_avatar_pressed() -> void:
+	if _try_open_web_avatar_file_picker():
+		_set_account_status("请选择头像图片")
+		return
 	if _open_macos_avatar_file_dialog():
 		return
 	if _try_open_native_avatar_file_picker():
@@ -983,6 +989,27 @@ func _on_upload_avatar_pressed() -> void:
 		return
 	_set_account_status("系统文件选择器暂时不可用")
 
+func _try_open_web_avatar_file_picker() -> bool:
+	if OS.get_name() != "Web" or _webFilePicker == null:
+		return false
+	return bool(_webFilePicker.call("open", ".png,.jpg,.jpeg,.webp", WEB_FILE_MAX_BYTES, _on_web_avatar_file_selected))
+
+func _on_web_avatar_file_selected(status: String, fileName: String, _mimeType: String, base64Data: String) -> void:
+	if status == "cancel":
+		_set_account_status("已取消头像选择")
+		return
+	if status == "too_large":
+		_set_account_status("头像图片不能超过8MB")
+		return
+	if status != "ok":
+		_set_account_status("浏览器读取头像失败")
+		return
+	var path := WebFilePicker.save_base64_file(base64Data, fileName, "avatar")
+	if path.is_empty():
+		_set_account_status("头像图片暂存失败")
+		return
+	_on_avatar_file_selected(path)
+
 func _try_open_native_avatar_file_picker() -> bool:
 	if DisplayServer.get_name() == "headless":
 		return false