Refactor LLM runtime handling and enhance CLI documentation

- Updated `resolve_llm_runtime` to prioritize live configuration over legacy notes, ensuring accurate runtime resolution.
- Enhanced `tunnel_forwards` to prefer current configuration for LLM runtime, improving tunnel setup logic.
- Improved idle-killer logic to handle stale markers and provide clearer warnings in the status output.
- Updated CLI documentation in `cli.md` to reflect changes in command behavior and runtime handling.
- Enhanced tests to validate new runtime resolution logic and ensure proper handling of configuration states.

src/gpu_rent/access_card.py

@@ -25,14 +25,17 @@ class AccessLink:
 
 
 def resolve_llm_runtime(cfg: Config) -> str:
+    """Live config wins; notes only if cfg is none (legacy session hint)."""
     runtime = normalize_runtime(cfg.llm_runtime)
+    if runtime != "none":
+        return runtime
     try:
         noted = (load_state().notes or {}).get("llm_runtime")
         if noted:
-            runtime = normalize_runtime(str(noted))
+            return normalize_runtime(str(noted))
     except Exception:
         pass
-    return runtime
+    return "none"
 
 
 def collect_access_links(cfg: Config, *, tunneled: bool) -> list[AccessLink]:
@@ -141,17 +144,35 @@ def render_access_panel(
         if host:
             subtitle.append(f"  ·  FIP {host}", style="dim")
 
-    body = Group(
-        subtitle,
-        Text(""),
-        table,
-        Text(""),
-        Text("команды", style="bold"),
-        cmds,
-        Text(""),
-        Text("Cursor MCP (вставь в mcp.json — файл сам не трогаем)", style="bold"),
-        mcp,
+    warn_bits: list[str] = []
+    try:
+        notes = load_state().notes or {}
+        if notes.get("idle_killer") == "failed":
+            warn_bits.append(
+                "idle-killer НЕ вооружён — GPU может крутиться без авто-stop"
+            )
+        if notes.get("llm_error"):
+            warn_bits.append(f"LLM ошибка: {str(notes['llm_error'])[:120]}")
+    except Exception:
+        pass
+
+    parts: list = [subtitle, Text("")]
+    if warn_bits:
+        for w in warn_bits:
+            parts.append(Text(f"⚠ {w}", style="bold red"))
+        parts.append(Text(""))
+    parts.extend(
+        [
+            table,
+            Text(""),
+            Text("команды", style="bold"),
+            cmds,
+            Text(""),
+            Text("Cursor MCP (вставь в mcp.json — файл сам не трогаем)", style="bold"),
+            mcp,
+        ]
     )
+    body = Group(*parts)
     return Panel(
         body,
         title=f"[bold]{title}[/bold]",