feat(mcp): implement MCP server integration for Codex CLI

- Added a new CodexConfigManager to manage TOML configuration for MCP server settings.
- Introduced MCP server IPC handlers in main.js to facilitate feature status updates.
- Enhanced CodexExecutor and FeatureExecutor to configure and utilize MCP server settings.
- Created a standalone MCP server script for JSON-RPC communication with Codex CLI.
- Updated model-provider to pass MCP server configuration to the executor.

These changes enable seamless integration of the MCP server with Codex CLI, improving feature management and execution capabilities.

app/electron/services/codex-executor.js

@@ -8,7 +8,9 @@
 const { spawn } = require('child_process');
 const { EventEmitter } = require('events');
 const readline = require('readline');
+const path = require('path');
 const CodexCliDetector = require('./codex-cli-detector');
+const codexConfigManager = require('./codex-config-manager');
 
 /**
  * Message types from Codex CLI JSON output
@@ -59,6 +61,7 @@ class CodexExecutor extends EventEmitter {
    * @param {number} options.maxTurns Not used - Codex CLI doesn't support this parameter
    * @param {string[]} options.allowedTools Not used - Codex CLI doesn't support this parameter
    * @param {Object} options.env Environment variables
+   * @param {Object} options.mcpServers MCP servers configuration (for configuring Codex TOML)
    * @returns {AsyncGenerator} Generator yielding messages
    */
   async *execute(options) {
@@ -69,7 +72,8 @@ class CodexExecutor extends EventEmitter {
       systemPrompt,
       maxTurns, // Not used by Codex CLI
       allowedTools, // Not used by Codex CLI
-      env = {}
+      env = {},
+      mcpServers = null
     } = options;
 
     const codexPath = this.findCodexPath();
@@ -81,6 +85,27 @@ class CodexExecutor extends EventEmitter {
       return;
     }
 
+    // Configure MCP server if provided
+    if (mcpServers && mcpServers['automaker-tools']) {
+      try {
+        // Get the absolute path to the MCP server script
+        const mcpServerScriptPath = path.resolve(__dirname, 'mcp-server-stdio.js');
+        
+        // Verify the script exists
+        const fs = require('fs');
+        if (!fs.existsSync(mcpServerScriptPath)) {
+          console.warn(`[CodexExecutor] MCP server script not found at ${mcpServerScriptPath}, skipping MCP configuration`);
+        } else {
+          // Configure Codex TOML to use the MCP server
+          await codexConfigManager.configureMcpServer(cwd, mcpServerScriptPath);
+          console.log('[CodexExecutor] Configured automaker-tools MCP server for Codex CLI');
+        }
+      } catch (error) {
+        console.error('[CodexExecutor] Failed to configure MCP server:', error);
+        // Continue execution even if MCP config fails - Codex will work without MCP tools
+      }
+    }
+
     // Combine system prompt with main prompt if provided
     // Codex CLI doesn't support --system-prompt argument, so we prepend it to the prompt
     let combinedPrompt = prompt;