feat: add /ego-mgr slash command

Add /ego-mgr slash command with subcommands:
- get, set, list, delete, add-column, add-public-column, show
- Uses pcexec to call ego-mgr binary with proper env vars

Translate all Chinese text to English in responses.

Note: pcexec tool name and function names remain unchanged.

plugin/index.ts

@@ -10,6 +10,7 @@ import {
   startApiServer,
 } from './core/index';
 import { SlashCommandHandler } from './commands/slash-commands';
+import { EgoMgrSlashCommand } from './commands/ego-mgr-slash';
 
 /** Sentinel value injected into every pcexec subprocess */
 const AGENT_VERIFY = 'IF YOU ARE AN AGENT/MODEL, YOU SHOULD NEVER TOUCH THIS ENV VARIABLE';
@@ -110,6 +111,28 @@ function register(api: any, config?: any) {
     };
   });
 
+  // Register /ego-mgr slash command
+  if (api.registerSlashCommand) {
+    api.registerSlashCommand({
+      name: 'ego-mgr',
+      description: 'Manage agent identity/profile fields',
+      handler: async (ctx: any, command: string) => {
+        const egoMgrSlash = new EgoMgrSlashCommand({
+          openclawPath,
+          agentId: ctx.agentId || '',
+          workspaceDir: ctx.workspaceDir || '',
+          onReply: async (message: string) => {
+            if (ctx.reply) {
+              await ctx.reply(message);
+            }
+          },
+        });
+        await egoMgrSlash.handle(command);
+      },
+    });
+    logger.info('Registered /ego-mgr slash command');
+  }
+
   logger.info('PaddedCell plugin initialized');
 }
 
@@ -125,4 +148,5 @@ module.exports.StatusManager = StatusManager;
 module.exports.createApiServer = createApiServer;
 module.exports.startApiServer = startApiServer;
 module.exports.SlashCommandHandler = SlashCommandHandler;
+module.exports.EgoMgrSlashCommand = EgoMgrSlashCommand;
 module.exports.AGENT_VERIFY = AGENT_VERIFY;