feat: [US-007] - Implement media generation step in CLI

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Ralph Agent

onboard.py

@@ -354,10 +354,91 @@ def hooks() -> None:
         )
 
 
+def _check_gemini_key() -> bool:
+    """Check if GEMINI_API_KEY is available in .env or environment."""
+    import os
+
+    if os.environ.get("GEMINI_API_KEY"):
+        return True
+    env_path = PROJECT_ROOT / ".env"
+    if env_path.exists():
+        for line in env_path.read_text().splitlines():
+            line = line.strip()
+            if line.startswith("GEMINI_API_KEY=") and not line.startswith("#"):
+                value = line.split("=", 1)[1].strip()
+                return _has_real_value(value)
+    return False
+
+
+def _run_media_generation(choice: str, project_name: str, theme: str) -> list[str]:
+    """Run the selected media generation and return list of generated file paths."""
+    import asyncio
+
+    from init.generate_banner import generate_banner as gen_banner
+    from init.generate_logo import generate_logo as gen_logo
+
+    generated_files: list[str] = []
+
+    if choice in ("Banner only", "Both"):
+        with console.status("[yellow]Generating banner...[/yellow]"):
+            asyncio.run(gen_banner(title=project_name, theme=theme))
+        banner_path = PROJECT_ROOT / "media" / "banner.png"
+        generated_files.append(str(banner_path))
+        rprint(f"[green]✓[/green] Banner saved to {banner_path}")
+
+    if choice in ("Logo only", "Both"):
+        with console.status("[yellow]Generating logo...[/yellow]"):
+            asyncio.run(gen_logo(project_name=project_name, theme=theme))
+        logo_dir = PROJECT_ROOT / "docs" / "public"
+        for name in (
+            "logo-light.png",
+            "logo-dark.png",
+            "icon-light.png",
+            "icon-dark.png",
+            "favicon.ico",
+        ):
+            generated_files.append(str(logo_dir / name))
+        rprint(f"[green]✓[/green] Logo assets saved to {logo_dir}")
+
+    return generated_files
+
+
 @app.command()
 def media() -> None:
     """Step 5: Generate banner and logo assets."""
-    rprint("[yellow]Step 5 (media) not yet implemented.[/yellow]")
+    if not _check_gemini_key():
+        rprint("[yellow]⚠ GEMINI_API_KEY is not configured.[/yellow]")
+        skip = questionary.confirm("Skip media generation?", default=True).ask()
+        if skip is None:
+            raise typer.Abort()
+        if skip:
+            rprint("[yellow]Media generation skipped.[/yellow]")
+            return
+
+    project_name = _read_pyproject_name()
+
+    theme = questionary.text(
+        "Describe the visual theme/style for your project assets:",
+        default="modern, clean, minimalist tech aesthetic",
+    ).ask()
+    if theme is None:
+        raise typer.Abort()
+
+    choice = questionary.select(
+        "What would you like to generate?",
+        choices=["Banner only", "Logo only", "Both", "Skip"],
+    ).ask()
+    if choice is None:
+        raise typer.Abort()
+
+    if choice == "Skip":
+        rprint("[yellow]Media generation skipped.[/yellow]")
+        return
+
+    generated_files = _run_media_generation(choice, project_name, theme)
+    rprint("\n[green]Generated files:[/green]")
+    for f in generated_files:
+        rprint(f"  {f}")
 
 
 if __name__ == "__main__":