T6: Decompose CLI — main.py → 9 command files, config.py → config_cmd.py

Split infrastructure/cli/:
- main.py (330 LOC) → 9 files in infrastructure/cli/commands/:
  * init.py, forecast.py, scenario.py, whatif.py, compare.py
  * import_xlsx.py, export_xlsx.py, analyze.py, info.py
- config.py (428 LOC) → commands/config_cmd.py (15 sub-commands)
- main.py → app.py (entry point: registers all commands)
- New: paths.py (MODEL_PATH, DATA_DIR)
- New: services.py (composition root + helpers: load_model, save_model,
  build_services, resolve_currency, convert_value, fmt_amount)
- cli/__init__.py (empty) удалён

Each command module: <100 LOC.
pyproject.toml: cf = infrastructure.cli.app:app
tests/test_cli.py: import обновлён на infrastructure.cli.app

CLI behavior идентично, все команды работают.
Tests: 67/67 pass.

infrastructure/cli/app.py

@@ -0,0 +1,45 @@
+"""Entry point приложения cf. Регистрирует все команды."""
+import sys
+
+import typer
+
+try:
+    sys.stdout.reconfigure(encoding="utf-8")
+except (AttributeError, OSError):
+    pass
+
+from infrastructure.cli.i18n import setup_i18n, t
+from infrastructure.cli.commands import (
+    analyze,
+    compare,
+    config_cmd,
+    export_xlsx,
+    forecast,
+    import_xlsx,
+    info,
+    init,
+    scenario,
+    whatif,
+)
+
+setup_i18n()
+
+app = typer.Typer(name="cf", help=t("app.help"))
+
+# Команды верхнего уровня
+app.command(name="init")(init.init)
+app.command(name="forecast")(forecast.forecast)
+app.command(name="scenario")(scenario.scenario)
+app.command(name="whatif")(whatif.whatif)
+app.command(name="compare")(compare.compare)
+app.command(name="import-xlsx")(import_xlsx.import_xlsx)
+app.command(name="export-xlsx")(export_xlsx.export_xlsx)
+app.command(name="analyze")(analyze.analyze)
+app.command(name="info")(info.info)
+
+# Под-приложение config
+app.add_typer(config_cmd.app, name="config")
+
+
+if __name__ == "__main__":
+    app()