Fix fast messages UI: icons, animation crash, keybind count, ru translation

- Use st::settingsButton (with icon padding) instead of settingsButtonNoIcon
  so the Rounded icon background doesn't overlap the button label
- Rebuild slots via CountStr.changes() + InvokeQueued to avoid deleting
  widgets from within their own click handlers (fixes _active.empty() assert)
- Filter keybind entries to Count() active slots via settings_shortcuts.cpp
  (stock worktree edit, part of fast-messages-shortcuts patch)
- Add lng_shortcuts_fast_message Russian translation to ag_lang blob

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Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

res/lang/lang_arcanegram_ru.strings

@@ -22,6 +22,7 @@
 "ag_fast_messages_placeholder" = "Текст сообщения";
 "ag_fast_messages_add" = "Добавить слот";
 "ag_fast_messages_remove" = "Удалить слот";
+"lng_shortcuts_fast_message" = "Быстрое сообщение {index}";
 "ag_settings_appearance" = "Внешний вид чата";
 "ag_settings_sync_title" = "Облачная синхронизация";
 "ag_sync_enabled_setting" = "Включить облачную синхронизацию";

src/cpp/arcanegram/ag_lang.cpp

@@ -35,6 +35,7 @@ constexpr auto kRuStrings = R"strings(
 "ag_fast_messages_placeholder" = "Текст сообщения";
 "ag_fast_messages_add" = "Добавить слот";
 "ag_fast_messages_remove" = "Удалить слот";
+"lng_shortcuts_fast_message" = "Быстрое сообщение {index}";
 "ag_settings_appearance" = "Внешний вид чата";
 "ag_settings_sync_title" = "Облачная синхронизация";
 "ag_sync_enabled_setting" = "Включить облачную синхронизацию";

src/cpp/arcanegram/features/ag_fast_messages.cpp

@@ -3,6 +3,7 @@
 #include "apiwrap.h"
 #include "arcanegram/ag_config.h"
 #include "arcanegram/ui/ag_settings_main.h"
+#include "base/invoke_queued.h"
 #include "data/data_peer.h"
 #include "data/data_session.h"
 #include "history/history.h"
@@ -26,21 +27,18 @@ namespace {
 using namespace ::Settings;
 using namespace ::Settings::Builder;
 
-void Rebuild(not_null<Ui::VerticalLayout*> container) {
-    while (container->count()) {
-        delete container->widgetAt(0);
-    }
+void FillSlots(not_null<Ui::VerticalLayout*> wrap, not_null<Ui::VerticalLayout*> outer) {
     const auto count = Config::FastMessages::Count();
     for (auto i = 0; i < count; ++i) {
         auto &item = Config::FastMessages::Slot(i);
         Ui::AddSubsectionTitle(
-            container,
+            wrap,
             tr::ag_fast_messages_slot(
                 lt_index,
                 rpl::single(QString::number(i + 1))));
-        const auto field = container->add(
+        const auto field = wrap->add(
             object_ptr<Ui::InputField>(
-                container,
+                wrap,
                 st::agFastMessageField,
                 tr::ag_fast_messages_placeholder(),
                 item.value()),
@@ -54,17 +52,16 @@ void Rebuild(not_null<Ui::VerticalLayout*> container) {
         }, field->lifetime());
         const auto idx = i;
         ::Settings::AddButtonWithIcon(
-            container,
+            wrap,
             tr::ag_fast_messages_remove(),
-            st::settingsButtonNoIcon,
+            st::settingsButton,
             { &st::menuIconDelete }
-        )->setClickedCallback([container, idx] {
+        )->setClickedCallback([outer, idx] {
             Config::FastMessages::RemoveSlot(idx);
-            Rebuild(container);
-            container->resizeToWidth(container->width());
+            outer->resizeToWidth(outer->width());
         });
-        Ui::AddSkip(container);
-        Ui::AddDivider(container);
+        Ui::AddSkip(wrap);
+        Ui::AddDivider(wrap);
     }
 }
 
@@ -82,23 +79,33 @@ private:
 
 void BuildPage(SectionBuilder &builder) {
     const auto outer = builder.container();
-    const auto inner = outer->add(object_ptr<Ui::VerticalLayout>(outer));
-    Rebuild(inner);
+
+    const auto slotWrap = outer->add(object_ptr<Ui::VerticalLayout>(outer));
+    FillSlots(slotWrap, outer);
+
+    Config::FastMessages::CountStr.changes(
+    ) | rpl::on_next([outer, slotWrap](auto) {
+        InvokeQueued(slotWrap, [outer, slotWrap] {
+            while (slotWrap->count()) {
+                delete slotWrap->widgetAt(0);
+            }
+            FillSlots(slotWrap, outer);
+            slotWrap->resizeToWidth(slotWrap->width());
+        });
+    }, slotWrap->lifetime());
 
     Ui::AddSkip(outer);
     ::Settings::AddButtonWithIcon(
         outer,
         tr::ag_fast_messages_add(),
-        st::settingsButtonNoIcon,
+        st::settingsButton,
         { &st::menuIconAdd }
-    )->setClickedCallback([inner] {
+    )->setClickedCallback([outer] {
         const auto count = Config::FastMessages::Count();
         if (count >= Config::FastMessages::kSlotCount) {
             return;
         }
         Config::FastMessages::SetCount(count + 1);
-        Rebuild(inner);
-        inner->resizeToWidth(inner->width());
     });
 
     Ui::AddSkip(outer);