fix(zwsp): strip zero-width chars from agent headers in command-config-handler

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/plugin-handlers/command-config-handler.ts

@@ -1,5 +1,5 @@
 import type { OhMyOpenCodeConfig } from "../config";
-import { getAgentListDisplayName } from "../shared/agent-display-names";
+import { getAgentDisplayName } from "../shared/agent-display-names";
 import {
   loadUserCommands,
   loadProjectCommands,
@@ -96,7 +96,7 @@ export async function applyCommandConfig(params: {
 function remapCommandAgentFields(commands: Record<string, Record<string, unknown>>): void {
   for (const cmd of Object.values(commands)) {
     if (cmd?.agent && typeof cmd.agent === "string") {
-      cmd.agent = getAgentListDisplayName(cmd.agent);
+      cmd.agent = getAgentDisplayName(cmd.agent);
     }
   }
 }