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/commands/scenario.py

@@ -0,0 +1,47 @@
+"""cf scenario — применить именованный сценарий (baseline/optimistic/pessimistic)."""
+import typer
+
+from application.scenarios import DEFAULT_SCENARIOS
+from infrastructure.cli.i18n import t
+from infrastructure.cli.services import (
+    build_services,
+    console,
+    convert_value,
+    fmt_amount,
+    load_model,
+    resolve_currency,
+)
+
+app = typer.Typer()
+
+CURRENCY_OPTION = typer.Option(None, "--currency", "-c", help=t("cmd.forecast.opt.currency"))
+
+
+@app.command()
+def scenario(
+    name: str = typer.Argument("baseline", help=t("cmd.scenario.arg.name")),
+    months: int = typer.Option(12, "--months", "-m", help=t("cmd.scenario.opt.months")),
+    currency: str | None = CURRENCY_OPTION,
+) -> None:
+    """Применить сценарий и показать прогноз"""
+    model = load_model()
+    target_curr, symbol = resolve_currency(model, currency)
+    _, scenario_service, _, converter = build_services(model)
+    base_curr = model.base_currency
+
+    if name in DEFAULT_SCENARIOS:
+        scenario_obj = DEFAULT_SCENARIOS[name]
+    else:
+        console.print(f"[red]{t('cmd.scenario.err.unknown', name=name)}[/red]")
+        console.print(t("cmd.scenario.err.available", scenarios=", ".join(DEFAULT_SCENARIOS.keys())))
+        raise typer.Exit(1)
+
+    result = scenario_service.apply(scenario_obj, months)
+    balance = convert_value(converter, result["total_balance"], base_curr, target_curr)
+    income = convert_value(converter, result["total_income"], base_curr, target_curr)
+    expenses = convert_value(converter, result["total_expenses"], base_curr, target_curr)
+    console.print(f"[bold]{t('cmd.scenario.label')}:[/bold] {result['scenario']}")
+    console.print(f"[dim]{result['scenario_description']}[/dim]")
+    console.print(f"{t('cmd.scenario.label.balance')}: {fmt_amount(balance, target_curr, symbol)}")
+    console.print(f"{t('cmd.scenario.label.income')}: {fmt_amount(income, target_curr, symbol)}")
+    console.print(f"{t('cmd.scenario.label.expenses')}: {fmt_amount(expenses, target_curr, symbol)}")