Refactor access card handling and update CLI output for tunnel operations

- Integrated `print_access_card` functionality into the `up` command for both tunneled and non-tunneled scenarios.
- Removed the deprecated `print_mcp_snippet` function from the session management flow.
- Updated the `tunnel_forwards` function to streamline port handling for LLM runtimes.
- Enhanced test cases to reflect changes in access card printing and MCP snippet logging.

tests/test_ready_snapshot.py

@@ -6,6 +6,9 @@ class _Cfg:
     boot_snapshot_name = "gpu-rent-boot-ok"
     swarmui_local_port = 17801
     notify_ready = True
+    llm_runtime = "none"
+    ollama_local_port = 17811
+    llamacpp_local_port = 17812
 
 
 def test_ensure_boot_snapshot_skips_existing():
@@ -66,10 +69,15 @@ def test_ensure_boot_snapshot_creates(monkeypatch):
     assert got.status == "available"
 
 
-def test_mcp_snippet(capsys):
+def test_mcp_snippet(monkeypatch):
+    monkeypatch.setattr(
+        "gpu_rent.access_card.load_state",
+        lambda: type("S", (), {"notes": {}})(),
+    )
     logs = []
     print_mcp_snippet(_Cfg(), logs.append)
     text = "\n".join(logs)
     assert "17801/mcp" in text
-    assert "gpu-rent tunnel" in text
     assert "mcp.json" in text
+    assert "SwarmUI UI" in text
+    assert "gpu-rent stop" in text