feat(recording): add visibility and service storage options (#15662)

* feat(recording): add visibility and service storage options

  - support hide-recording-button in Flutter and Sciter
  - allow a custom save directory for Windows service recordings
  - sanitize peer IDs used in recording filenames

  Tested:
  - with hide-recording-button=Y and allow-auto-record-outgoing=Y,
    outgoing sessions are recorded automatically while the recording button
    remains hidden and cannot be stopped from the UI; verified on Flutter
    desktop, Sciter, and Android
  - windows-service-video-save-directory takes effect when the Windows client
    runs as an installed service
  - the Windows controlling side can save recordings for direct IP:port
    connections

Signed-off-by: 21pages <sunboeasy@gmail.com>

* update hbb_common

Signed-off-by: 21pages <sunboeasy@gmail.com>

* fix(recording): validate configured save directories

  - trim configured recording directory paths
  - reject non-absolute paths and fall back to defaults
  - warn when a non-empty path is invalid

Signed-off-by: 21pages <sunboeasy@gmail.com>

* fix(recording): validate configured save directories

Signed-off-by: 21pages <sunboeasy@gmail.com>

---------

Signed-off-by: 21pages <sunboeasy@gmail.com>

flutter/lib/common/widgets/toolbar.dart

@@ -583,6 +583,7 @@ List<TTextMenu> toolbarControls(BuildContext context, String id, FFI ffi) {
   }
   // record
   if (!(isDesktop || isWeb) &&
+      bind.mainGetLocalOption(key: kOptionHideRecordingButton) != 'Y' &&
       (ffi.recordingModel.start || (perms["recording"] != false))) {
     v.add(TTextMenu(
         child: Row(

flutter/lib/consts.dart

@@ -104,6 +104,7 @@ const String kOptionAutoDisconnectTimeout = "auto-disconnect-timeout";
 const String kOptionEnableHwcodec = "enable-hwcodec";
 const String kOptionAllowAutoRecordIncoming = "allow-auto-record-incoming";
 const String kOptionAllowAutoRecordOutgoing = "allow-auto-record-outgoing";
+const String kOptionHideRecordingButton = "hide-recording-button";
 const String kOptionVideoSaveDirectory = "video-save-directory";
 const String kOptionAccessMode = "access-mode";
 const String kOptionEnableKeyboard = "enable-keyboard";

flutter/lib/desktop/widgets/remote_toolbar.dart

@@ -2740,7 +2740,9 @@ class _RecordMenu extends StatelessWidget {
   Widget build(BuildContext context) {
     var ffi = Provider.of<FfiModel>(context);
     var recordingModel = Provider.of<RecordingModel>(context);
-    final visible =
+    final hideRecordingButton =
+        bind.mainGetLocalOption(key: kOptionHideRecordingButton) == 'Y';
+    final visible = !hideRecordingButton &&
         (recordingModel.start || ffi.permissions['recording'] != false);
     if (!visible) return Offstage();
     return _IconMenuButton(