feat: добавить локализацию TUI (en/ru) с переключением клавишей L

- Добавлены TuiResources (sealed record), Locale, LocalizationService
- Все строки интерфейса вынесены из .razor-файлов в TuiResources
- App.razor: клавиша L циклически переключает локаль, заголовок показывает [EN]/[RU]
- Дочерние компоненты получают Loc как параметр (stateless)
- Создан AGENT.tui.md с правилами работы с TUI для агентов
- Обновлены AGENTS.md и CLAUDE.md со ссылками на AGENT.tui.md

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

LazyBear.MCP/TUI/Components/App.razor

@@ -3,18 +3,19 @@
 @inject ToolRegistryService Registry
 @inject InMemoryLogSink LogSink
 @inject GlobalKeyboardService KeyboardService
+@inject LocalizationService Localization
 
 @implements IDisposable
 
 <Rows Expand="true">
-    <Panel Title="LazyBear MCP"
+    <Panel Title="@($"LazyBear MCP  [{Localization.Label}]")"
            TitleColor="@UiPalette.Accent"
            BorderColor="@UiPalette.Frame"
            Expand="true"
            Height="@GetPanelHeight()"
            Padding="@(new Spectre.Console.Padding(1, 0, 1, 0))">
         <Rows Expand="true">
-            <Markup Content="Tab: switch tabs  |  Arrows: navigate  |  Space: toggle  |  Enter: open" Foreground="@UiPalette.TextMuted" />
+            <Markup Content="@Localization.Current.HintBar" Foreground="@UiPalette.TextMuted" />
             <Markup Content=" " />
 
             <Columns>
@@ -36,7 +37,8 @@
                 <OverviewTab Rows="@GetOverviewRows()"
                              SelectedIndex="@_overviewSelection"
                              SelectedIndexChanged="@OnOverviewSelectionChanged"
-                             ViewportRows="@GetOverviewViewportRows()" />
+                             ViewportRows="@GetOverviewViewportRows()"
+                             Loc="@Localization.Current" />
             }
             else if (_activeTab == Tab.Logs)
             {
@@ -45,14 +47,16 @@
                          SelectedIndexChanged="@OnLogSelectionChanged"
                          SelectedFilter="@_logFilters[_logFilterIndex]"
                          ViewportRows="@GetLogsViewportRows()"
-                         IsStickyToBottom="@_logsStickToBottom" />
+                         IsStickyToBottom="@_logsStickToBottom"
+                         Loc="@Localization.Current" />
             }
             else
             {
                 <SettingsTab Entries="@GetSettingsEntries()"
                              SelectedIndex="@_settingsSelection"
                              SelectedIndexChanged="@OnSettingsSelectionChanged"
-                             ViewportRows="@GetSettingsViewportRows()" />
+                             ViewportRows="@GetSettingsViewportRows()"
+                             Loc="@Localization.Current" />
             }
         </Rows>
     </Panel>
@@ -87,6 +91,7 @@
         Registry.StateChanged += OnRegistryChanged;
         LogSink.OnLog += OnNewLog;
         KeyboardService.OnKeyPressed += OnConsoleKeyPressed;
+        Localization.OnChanged += OnLocaleChanged;
     }
 
     // Конвертация ConsoleKeyInfo → KeyboardEventArgs для переиспользования существующей логики
@@ -130,6 +135,9 @@
         });
     }
 
+    private void OnLocaleChanged() =>
+        InvokeAsync(StateHasChanged);
+
     private void HandleKeyDown(KeyboardEventArgs args)
     {
         if (string.Equals(args.Key, "Tab", StringComparison.Ordinal))
@@ -138,6 +146,12 @@
             return;
         }
 
+        if (args.Key is "l" or "L")
+        {
+            Localization.SwitchNext();
+            return; // StateHasChanged вызовет OnLocaleChanged
+        }
+
         switch (_activeTab)
         {
             case Tab.Overview:
@@ -447,7 +461,7 @@
                     toolName,
                     isModuleEnabled
                         ? $"{module.ModuleName} / {toolName}"
-                        : $"{module.ModuleName} / {toolName} (module is OFF, tool state is preserved)",
+                        : $"{module.ModuleName} / {toolName} {Localization.Current.ModuleOffPreserved}",
                     isConfigured,
                     isModuleEnabled,
                     false,
@@ -527,11 +541,11 @@
     private static bool IsInfoLevel(LogEntry entry) =>
         entry.Level is LogLevel.Information or LogLevel.Debug or LogLevel.Trace;
 
-    private static string GetTabLabel(Tab tab) => tab switch
+    private string GetTabLabel(Tab tab) => tab switch
     {
-        Tab.Overview => "Overview",
-        Tab.Logs => "Logs",
-        _ => "Settings"
+        Tab.Overview => Localization.Current.TabOverview,
+        Tab.Logs     => Localization.Current.TabLogs,
+        _            => Localization.Current.TabSettings
     };
 
     public void Dispose()
@@ -539,5 +553,6 @@
         Registry.StateChanged -= OnRegistryChanged;
         LogSink.OnLog -= OnNewLog;
         KeyboardService.OnKeyPressed -= OnConsoleKeyPressed;
+        Localization.OnChanged -= OnLocaleChanged;
     }
 }