Fix: Pin @mermaid-js/mermaid-cli to version 9.0.0

mermaid_renderer.py

@@ -40,9 +40,9 @@ class MermaidRenderer:
             try:
                 # Using '--unsafe-perm' might be needed in some environments, but use with caution.
                 # Pinning to a specific version that supports --args
-                install_cmd = ["npm", "install", "-g", "@mermaid-js/mermaid-cli@9.1.0"]
+                install_cmd = ["npm", "install", "-g", "@mermaid-js/mermaid-cli@9.0.0"]
                 subprocess.run(install_cmd, check=True, capture_output=True, text=True)
-                logging.info("@mermaid-js/mermaid-cli@9.1.0 installed successfully via npm.")
+                logging.info("@mermaid-js/mermaid-cli@9.0.0 installed successfully via npm.")
             except subprocess.SubprocessError as install_error:
                 logging.error(f"Failed to install @mermaid-js/mermaid-cli: {install_error.stderr}")
                 raise RuntimeError("Error: @mermaid-js/mermaid-cli (mmdc) is not installed and automatic installation failed. Please install manually: npm install -g @mermaid-js/mermaid-cli")