feat(installer): restore Russian UI and setup icon

- re-enable Russian language entry and Russian labels in Inno script

- restore SetupIconFile via MyIconFile define

- pass MyIconFile from build.py with explicit file existence check

installer/AnabasisManager.iss

@@ -2,6 +2,9 @@
 #ifndef MyAppVersion
   #define MyAppVersion "0.0.0"
 #endif
+#ifndef MyIconFile
+  #define MyIconFile "..\icon.ico"
+#endif
 
 [Setup]
 AppId={{6CD9D6F2-4B95-4E9C-A8D8-2A9C8F6AA741}
@@ -19,12 +22,14 @@ SolidCompression=yes
 WizardStyle=modern
 ArchitecturesInstallIn64BitMode=x64compatible
 UninstallDisplayIcon={app}\AnabasisManager.exe
+SetupIconFile={#MyIconFile}
 
 [Languages]
+Name: "russian"; MessagesFile: "compiler:Languages\Russian.isl"
 Name: "english"; MessagesFile: "compiler:Default.isl"
 
 [Tasks]
-Name: "desktopicon"; Description: "Create a desktop shortcut"; GroupDescription: "Additional tasks:"
+Name: "desktopicon"; Description: "Создать ярлык на рабочем столе"; GroupDescription: "Дополнительные задачи:"
 
 [Files]
 Source: "..\dist\AnabasisManager\*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs createallsubdirs
@@ -34,4 +39,4 @@ Name: "{group}\Anabasis Manager"; Filename: "{app}\AnabasisManager.exe"
 Name: "{autodesktop}\Anabasis Manager"; Filename: "{app}\AnabasisManager.exe"; Tasks: desktopicon
 
 [Run]
-Filename: "{app}\AnabasisManager.exe"; Description: "Launch Anabasis Manager"; Flags: nowait postinstall skipifsilent
+Filename: "{app}\AnabasisManager.exe"; Description: "Запустить Anabasis Manager"; Flags: nowait postinstall skipifsilent