fix: resolve CI linting and type errors

src/promptforge/cli/commands/prompt.py

@@ -1,7 +1,7 @@
-import sys
+"""Prompt management commands."""
+
 import click
-from pathlib import Path
-from datetime import datetime
+
 from promptforge.core.prompt import Prompt, PromptVariable, VariableType
 from promptforge.core.template import TemplateEngine
 from promptforge.core.git_manager import GitManager
@@ -109,7 +109,10 @@ def show(ctx, name: str):
         click.echo(f"Provider: {prompt.provider}")
     if prompt.tags:
         click.echo(f"Tags: {', '.join(prompt.tags)}")
-    click.echo(f"\n--- Content ---")
+    click.echo(f"Created: {prompt.created_at.isoformat()}")
+    click.echo(f"Updated: {prompt.updated_at.isoformat()}")
+    click.echo("")
+    click.echo("--- Content ---")
     click.echo(prompt.content)
 
 
@@ -135,5 +138,5 @@ def delete(ctx, name: str, yes: bool):
         filepath.unlink()
         click.echo(f"Deleted prompt: {name}")
     else:
-        click.echo(f"Prompt file not found", err=True)
-        raise click.Abort()
+        click.echo("Prompt file not found", err=True)
+        raise click.Abort()