fix(zwsp): strip zero-width chars in delegate-task tools

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

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

src/tools/delegate-task/subagent-resolver.ts

@@ -89,9 +89,10 @@ Create the work plan directly - that's your job as the planning agent.`,
 
     const callableAgents = agents.filter((agent) => isTaskCallableAgentMode(agent.mode))
 
-    const resolvedDisplayName = getAgentDisplayName(agentToUse)
+    const resolvedDisplayName = getAgentDisplayName(agentToUse).replace(/^\u200B+/, "")
+    const normalizedAgentToUse = agentToUse.replace(/^\u200B+/, "")
     const matchedAgent = callableAgents.find(
-      (agent) => agent.name.toLowerCase() === agentToUse.toLowerCase()
+      (agent) => agent.name.toLowerCase() === normalizedAgentToUse.toLowerCase()
         || agent.name.toLowerCase() === resolvedDisplayName.toLowerCase()
     )
     if (!matchedAgent) {

src/tools/delegate-task/sync-prompt-sender.ts

@@ -80,7 +80,7 @@ export async function sendSyncPrompt(
   const promptArgs = {
     path: { id: input.sessionID },
     body: {
-      agent: input.agentToUse,
+      agent: input.agentToUse.replace(/^\u200B+/, ""),
       system: input.systemContent,
       tools,
       parts: [createInternalAgentTextPart(effectivePrompt)],