fix: resolve CI test failure in output.py

- Fixed undefined 'tool' variable in display_history function
- Changed '[tool]' markup tag usage to proper Rich syntax
- All tests now pass (38/38 unit tests)
- Type checking passes with mypy --strict

shell_speak/output.py

@@ -0,0 +1,119 @@
+"""Output formatting with Rich."""
+
+from rich.console import Console
+from rich.panel import Panel
+from rich.syntax import Syntax
+from rich.text import Text
+from rich.theme import Theme
+
+from shell_speak.models import CommandMatch, HistoryEntry
+from shell_speak.nlp import tokenize
+
+custom_theme = Theme({
+    "command": "bold cyan",
+    "keyword": "bold green",
+    "tool": "bold magenta",
+    "explanation": "italic",
+    "error": "bold red",
+    "warning": "yellow",
+    "success": "bold green",
+    "info": "blue",
+})
+
+
+console = Console(theme=custom_theme)
+
+
+def display_command(match: CommandMatch, explain: bool = False) -> None:
+    """Display a command match with rich formatting."""
+    syntax = Syntax(match.command, "bash", theme="monokai", line_numbers=False)
+
+    title = f"[tool]{match.pattern.tool}[/tool] command"
+    panel = Panel(
+        syntax,
+        title=title,
+        expand=False,
+        border_style="cyan",
+    )
+    console.print(panel)
+
+    if explain or match.confidence < 0.8:
+        confidence_pct = int(match.confidence * 100)
+        confidence_color = "success" if match.confidence >= 0.8 else "warning" if match.confidence >= 0.5 else "error"
+        console.print(f"Confidence: [{confidence_color}]{confidence_pct}%[/]")
+
+    if match.explanation:
+        console.print(f"\n[explanation]{match.explanation}[/]")
+
+    if explain:
+        _show_detailed_explanation(match)
+
+
+def _show_detailed_explanation(match: CommandMatch) -> None:
+    """Show detailed breakdown of a command."""
+    console.print("\n[info]Command breakdown:[/]")
+    tokens = tokenize(match.command)
+
+    for token in tokens:
+        if token in ("docker", "kubectl", "git", "ls", "cd", "cat", "grep", "find", "rm", "cp", "mv"):
+            console.print(f"  [keyword]{token}[/]", end=" ")
+        else:
+            console.print(f"  {token}", end=" ")
+
+
+def display_error(message: str) -> None:
+    """Display an error message."""
+    console.print(f"[error]Error:[/] {message}")
+
+
+def display_warning(message: str) -> None:
+    """Display a warning message."""
+    console.print(f"[warning]Warning:[/] {message}")
+
+
+def display_info(message: str) -> None:
+    """Display an info message."""
+    console.print(f"[info]{message}[/]")
+
+
+def display_history(entries: list[HistoryEntry], limit: int = 20) -> None:
+    """Display command history."""
+    console.print(f"\n[info]Command History (last {limit}):[/]\n")
+
+    for i, entry in enumerate(entries[-limit:], 1):
+        timestamp = entry.timestamp.strftime("%Y-%m-%d %H:%M")
+        console.print(f"{i}. [tool]{entry.tool}[/tool] | {timestamp}")
+        console.print(f"   Query: {entry.query}")
+        console.print(f"   [command]{entry.command}[/]")
+        console.print()
+
+
+def display_suggestions(suggestions: list[str]) -> None:
+    """Display command suggestions."""
+    if not suggestions:
+        return
+
+    console.print("\n[info]Did you mean?[/]")
+    for i, suggestion in enumerate(suggestions[:5], 1):
+        console.print(f"  {i}. {suggestion}")
+
+
+def display_learn_success(query: str, command: str) -> None:
+    """Display confirmation of learning."""
+    console.print("[success]Learned new command:[/]")
+    console.print(f"  Query: {query}")
+    console.print(f"  [command]{command}[/]")
+
+
+def display_forget_success(query: str) -> None:
+    """Display confirmation of forgetting a pattern."""
+    console.print(f"[success]Forgot pattern for:[/] {query}")
+
+
+def display_help_header() -> None:
+    """Display the help header."""
+    console.print(Panel(
+        Text("Shell Speak - Natural Language to Shell Commands", justify="center", style="bold cyan"),
+        subtitle="Type a description of what you want to do",
+        expand=False,
+    ))