Support CSI2031 (dark/light theme switching) + remove STDIN cache to avoid stale color queries (#5105)

* initial phase 1 implementation

* various fies

* some fixes

* fix fragmented stdin cases

* some fixes

* renaming

* guard against old clients

* implement csi 2031

* allow toggling theme with actions

* rustfmt

* fix: finalize trailing characters in ansi parser as well

* add pr

1 files changed, 16 insertions, 0 deletions

diff --git a/zellij-utils/src/client_server_contract/client_to_server.proto b/zellij-utils/src/client_server_contract/client_to_server.proto
index 2e783f3d..834feccd 100644
--- a/zellij-utils/src/client_server_contract/client_to_server.proto
+++ b/zellij-utils/src/client_server_contract/client_to_server.proto
@@ -23,6 +23,8 @@ message ClientToServerMsg {
     AttachWatcherClientMsg attach_watcher_client = 16;
     SubscribeToPaneRendersMsg subscribe_to_pane_renders = 17;
     DesktopNotificationResponseMsg desktop_notification_response = 18;
+    ForwardedReplyFromHostMsg forwarded_reply_from_host = 19;
+    HostTerminalThemeChangedMsg host_terminal_theme_changed = 20;
   }
 }
 
@@ -109,3 +111,17 @@ message SubscribeToPaneRendersMsg {
 message DesktopNotificationResponseMsg {
   bytes raw_bytes = 1;
 }
+
+message ForwardedReplyFromHostMsg {
+  uint32 token = 1;
+  bytes reply_bytes = 2;
+}
+
+message HostTerminalThemeChangedMsg {
+  HostTerminalThemeIndication mode = 1;
+}
+
+enum HostTerminalThemeIndication {
+  HOST_TERMINAL_THEME_INDICATION_DARK = 0;
+  HOST_TERMINAL_THEME_INDICATION_LIGHT = 1;
+}