Update README and CLI documentation for tunnel functionality

- Enhanced README.md to clarify the `gpu-rent up` command, including default tunnel behavior and options for cloud-only operation.
- Updated cli.md to reflect changes in the `gpu-rent up` command, detailing the new `--no-tunnel` option and its implications.
- Revised decisions.md to explain the separation of `up` and `tunnel` commands, emphasizing the default tunnel opening after `up`.
- Improved doctor.py to provide clearer instructions regarding tunnel creation and cloud-only usage.
- Adjusted notify.py to reflect the updated command usage for accessing the SwarmUI.

src/gpu_rent/cli.py

@@ -75,6 +75,7 @@ def _print_checks(checks) -> int:
         _print_next_steps(failed)
         return 1
     console.print("\n[green]Можно идти дальше.[/green] Дальше: gpu-rent up --yes")
+    console.print("  (туннель :17801 по умолчанию; только облако: --no-tunnel)")
     console.print("Чеклист spike: docs/spike-notes.md")
     return 0
 
@@ -290,8 +291,18 @@ def up(
     flavor: Optional[str] = typer.Option(None, "--flavor", help="Flavor id, без фоллбека"),
     yes: bool = typer.Option(False, "--yes", help="Без вопросов"),
     adopt: bool = typer.Option(False, "--adopt", help="Подхватить тег gpu-rent без state"),
+    no_tunnel: bool = typer.Option(
+        False,
+        "--no-tunnel",
+        help="Только облако + bootstrap, без локального туннеля",
+    ),
+    open_browser: bool = typer.Option(
+        True,
+        "--open/--no-open",
+        help="После туннеля открыть браузер на 17801 (по умолчанию да)",
+    ),
 ) -> None:
-    """Create/unshelve GPU и bootstrap SwarmUI (без Docker)."""
+    """Create/unshelve GPU, bootstrap SwarmUI, по умолчанию туннель на :17801."""
     try:
         checks = run_doctor()
         code = _print_checks(checks)
@@ -302,7 +313,7 @@ def up(
         def confirm(msg: str) -> bool:
             return typer.confirm(msg)
 
-        cmd_up(
+        state = cmd_up(
             cfg,
             no_spot=no_spot,
             flavor=flavor,
@@ -311,6 +322,27 @@ def up(
             confirm=confirm,
             log=lambda m: console.print(m),
         )
+        if no_tunnel:
+            console.print(
+                f"[bold]готово[/bold] (без туннеля). "
+                f"UI: gpu-rent tunnel --open  |  stop: gpu-rent stop"
+            )
+            if state.floating_ip:
+                console.print(f"FIP {state.floating_ip}")
+            return
+
+        if not state.floating_ip:
+            raise GpuRentError("нет floating IP после up — туннель не открыть")
+        console.print(
+            f"[bold]панель[/bold] http://127.0.0.1:{cfg.swarmui_local_port}  "
+            "(Ctrl+C = закрыть туннель, GPU жив → gpu-rent stop)"
+        )
+        run_tunnel(
+            cfg,
+            state.floating_ip,
+            open_browser=open_browser,
+            log=lambda m: console.print(m),
+        )
     except GpuRentError as exc:
         _die(exc)