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>

src/ui/header.tis

@@ -151,7 +151,7 @@ class Header: Reactor.Component {
             <span #action>{svg_action}</span>
             <span #display>{svg_display}</span>
             <span #keyboard>{svg_keyboard}</span>
-            {recording_enabled ? <span #recording>{recording ? svg_recording_on : svg_recording_off}</span> : ""}
+            {recording_enabled && show_recording_button ? <span #recording>{recording ? svg_recording_on : svg_recording_off}</span> : ""}
             {this.renderKeyboardPop()}
             {this.renderDisplayPop()}
             {this.renderActionPop()}

src/ui/remote.rs

@@ -504,6 +504,7 @@ impl sciter::EventHandler for SciterSession {
         fn get_id();
         fn get_default_pi();
         fn get_option(String);
+        fn get_local_option(String);
         fn t(String);
         fn set_option(String, String);
         fn input_os_password(String, bool);
@@ -638,6 +639,10 @@ impl SciterSession {
         crate::client::translate(name)
     }
 
+    pub fn get_local_option(&self, key: String) -> String {
+        crate::ui_interface::get_local_option(key)
+    }
+
     pub fn get_icon(&self) -> String {
         super::get_icon()
     }

src/ui/remote.tis

@@ -17,6 +17,7 @@ var audio_enabled = true; // server side
 var file_enabled = true; // server side
 var restart_enabled = true; // server side
 var recording_enabled = true; // server side
+var show_recording_button = handler.get_local_option("hide-recording-button") != "Y";
 var privacy_mode_enabled = true; // server side
 var scroll_body = $(body);
 var peer_platform = "";