feat(patches): add toggle to ignore peer chat wallpapers

patches/feature/disable-chat-wallpaper.patch

@@ -0,0 +1,46 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: devilreef <devilreef@shino.boo>
+Date: Wed, 29 Apr 2026 04:27:10 +0600
+Subject: [PATCH] allow disabling per-peer chat wallpapers
+
+---
+ Telegram/SourceFiles/window/section_widget.cpp | 16 +++++++++++-----
+ 1 file changed, 11 insertions(+), 5 deletions(-)
+
+diff --git a/Telegram/SourceFiles/window/section_widget.cpp b/Telegram/SourceFiles/window/section_widget.cpp
+index 0000000..0000000 100644
+--- a/Telegram/SourceFiles/window/section_widget.cpp
++++ b/Telegram/SourceFiles/window/section_widget.cpp
+@@ -7,6 +7,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+ */
+ #include "window/section_widget.h"
+ 
++#include "arcanegram/features/ag_chat_wallpaper.h"
+ #include "mainwidget.h"
+ #include "mainwindow.h"
+ #include "ui/ui_utility.h"
+@@ -53,11 +54,16 @@ struct ResolvedPaper {
+ 
+ [[nodiscard]] rpl::producer<const Data::WallPaper*> PeerWallPaperMapped(
+ 		not_null<PeerData*> peer) {
+-	return peer->session().changes().peerFlagsValue(
+-		peer,
+-		Data::PeerUpdate::Flag::ChatWallPaper
+-	) | rpl::map([=]() -> rpl::producer<const Data::WallPaper*> {
+-		return WallPaperResolved(&peer->owner(), peer->wallPaper());
++	return rpl::combine(
++		peer->session().changes().peerFlagsValue(
++			peer,
++			Data::PeerUpdate::Flag::ChatWallPaper),
++		Arcanegram::ChatWallpaper::DisabledValue()
++	) | rpl::map([=](const auto &, bool disabled)
++	-> rpl::producer<const Data::WallPaper*> {
++		return WallPaperResolved(
++			&peer->owner(),
++			disabled ? nullptr : peer->wallPaper());
+ 	}) | rpl::flatten_latest();
+ }
+ 
+-- 
+2.52.0.windows.1
+

res/lang/lang_arcanegram.strings

@@ -4,6 +4,8 @@
 "ag_forwarded_date_label" = "Date";
 "ag_show_seconds_setting" = "Show seconds in timestamps";
 "ag_show_seconds_info" = "Display HH:MM:SS instead of HH:MM in message timestamps and tooltips.";
+"ag_chat_wallpaper_disabled_setting" = "Ignore custom chat wallpapers";
+"ag_chat_wallpaper_disabled_info" = "Always use your default background; ignore wallpapers set by chats and channels.";
 "ag_hidden_users_title" = "Hidden users";
 "ag_hidden_users_info" = "Messages from these users are hidden in every chat.";
 "ag_hidden_users_empty" = "No hidden users yet. Right-click any avatar to hide its messages.";

series

@@ -15,4 +15,5 @@ feature/hidden-users-profile-menu.patch
 feature/hidden-users-element-hide.patch
 feature/hidden-users-reactions.patch
 feature/hidden-users-who-reacted.patch
+feature/disable-chat-wallpaper.patch
 misc/branding.patch

src/cpp/arcanegram/CMakeLists.txt

@@ -32,6 +32,8 @@ PRIVATE
     features/ag_show_seconds.cpp
     features/ag_hidden_users.h
     features/ag_hidden_users.cpp
+    features/ag_chat_wallpaper.h
+    features/ag_chat_wallpaper.cpp
     ui/ag_settings_widgets.h
     ui/ag_settings_widgets.cpp
     ui/ag_settings_main.h

src/cpp/arcanegram/ag_config.h

@@ -49,4 +49,10 @@ inline auto Stored = Item<QString>("ag_hidden_users", QString());
 
 } // namespace HiddenUsers
 
+namespace ChatWallpaper {
+
+inline auto Disabled = BoolItem("ag_chat_wallpaper_disabled", false);
+
+} // namespace ChatWallpaper
+
 } // namespace Arcanegram::Config

src/cpp/arcanegram/ag_hooks.cpp

@@ -3,6 +3,7 @@
 #include "arcanegram/features/ag_forwarded_header.h"
 #include "arcanegram/features/ag_show_seconds.h"
 #include "arcanegram/features/ag_hidden_users.h"
+#include "arcanegram/features/ag_chat_wallpaper.h"
 
 namespace Arcanegram::Hooks {
 
@@ -10,6 +11,7 @@ void init() {
     Arcanegram::ForwardedHeader::Init();
     Arcanegram::Time::Init();
     Arcanegram::HiddenUsers::Init();
+    Arcanegram::ChatWallpaper::Init();
 }
 
 } // namespace Arcanegram::Hooks

src/cpp/arcanegram/features/ag_chat_wallpaper.cpp

@@ -0,0 +1,31 @@
+#include "arcanegram/features/ag_chat_wallpaper.h"
+
+#include "arcanegram/ag_config.h"
+#include "arcanegram/ui/ag_settings_widgets.h"
+#include "lang/lang_keys.h"
+
+namespace Arcanegram::ChatWallpaper {
+
+bool Disabled() {
+    return Config::ChatWallpaper::Disabled.value();
+}
+
+rpl::producer<bool> DisabledValue() {
+    return rpl::single(
+        Config::ChatWallpaper::Disabled.value()
+    ) | rpl::then(Config::ChatWallpaper::Disabled.changes());
+}
+
+void Setup(::Settings::Builder::SectionBuilder &builder) {
+    Arcanegram::Settings::AddBoolRow(
+        builder,
+        u"arcanegram/chat_wallpaper_disabled"_q,
+        tr::ag_chat_wallpaper_disabled_setting(),
+        tr::ag_chat_wallpaper_disabled_info(),
+        Config::ChatWallpaper::Disabled);
+}
+
+void Init() {
+}
+
+} // namespace Arcanegram::ChatWallpaper

src/cpp/arcanegram/features/ag_chat_wallpaper.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <rpl/producer.h>
+
+namespace Settings::Builder {
+class SectionBuilder;
+} // namespace Settings::Builder
+
+namespace Arcanegram::ChatWallpaper {
+
+[[nodiscard]] bool Disabled();
+[[nodiscard]] rpl::producer<bool> DisabledValue();
+
+void Setup(::Settings::Builder::SectionBuilder &builder);
+void Init();
+
+} // namespace Arcanegram::ChatWallpaper

src/cpp/arcanegram/ui/ag_settings_main.cpp

@@ -2,6 +2,7 @@
 
 #include "arcanegram/features/ag_forwarded_header.h"
 #include "arcanegram/features/ag_show_seconds.h"
+#include "arcanegram/features/ag_chat_wallpaper.h"
 #include "arcanegram/ui/ag_hidden_users_settings.h"
 #include "lang/lang_keys.h"
 #include "settings/sections/settings_main.h"
@@ -32,6 +33,7 @@ private:
 void BuildContent(SectionBuilder &builder) {
     Arcanegram::ForwardedHeader::Setup(builder);
     Arcanegram::Time::Setup(builder);
+    Arcanegram::ChatWallpaper::Setup(builder);
     Arcanegram::HiddenUsers::Setup(builder);
 }