CLI: add fonts download subcommand to fetch assets

Expose a `docx-mcp fonts download` subcommand that runs the existing `download_fonts.sh` helper, so users can fetch the embedded fonts via the binary. Keeps existing flags intact and avoids build-time network coupling.

src/main.rs

@@ -1,7 +1,7 @@
 use anyhow::Result;
 use mcp_server::{Server, ServerBuilder, ServerOptions};
 use mcp_core::ToolManager;
-use tracing::info;
+use tracing::{info, warn};
 use tracing_subscriber::{EnvFilter, fmt, prelude::*};
 use clap::Parser;
 
@@ -16,6 +16,7 @@ mod security;
 mod fonts;
 
 use docx_tools::DocxToolsProvider;
+use std::process::Command;
 
 #[tokio::main]
 async fn main() -> Result<()> {
@@ -26,6 +27,33 @@ async fn main() -> Result<()> {
 
     // Parse command line arguments (which also includes environment variables)
     let args = security::Args::parse();
+
+    // Handle top-level subcommands that should run and exit
+    if let Some(cmd) = &args.command {
+        match cmd {
+            security::CliCommand::Fonts { action } => {
+                match action {
+                    security::FontsAction::Download => {
+                        info!("Downloading fonts via embedded helper...");
+                        // Prefer the script if available; otherwise, fetch directly in the future
+                        let script_path = "./download_fonts.sh";
+                        if !std::path::Path::new(script_path).exists() {
+                            warn!("download_fonts.sh not found; please run it manually or pull latest");
+                            anyhow::bail!("download_fonts.sh not found");
+                        }
+
+                        let status = Command::new(script_path).status()?;
+                        if !status.success() {
+                            anyhow::bail!("Font download helper failed");
+                        }
+                        info!("Fonts downloaded successfully");
+                        return Ok(());
+                    }
+                }
+            }
+        }
+    }
+
     let security_config = security::SecurityConfig::from_args(args);
     info!("Starting DOCX MCP Server - Security: {}", security_config.get_summary());