feat(team-mode): add resolveCallerTeamLead helper

🤖 Generated with assistance of [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/features/team-mode/resolve-caller-team-lead.ts

@@ -0,0 +1,47 @@
+import { getAgentConfigKey, stripAgentListSortPrefix } from "../../shared/agent-display-names"
+
+import { AGENT_ELIGIBILITY_REGISTRY, type TeamSpec } from "./types"
+
+export type CallerTeamLead = {
+  agentTypeId?: string
+  displayName?: string
+  isEligibleForTeamLead: boolean
+}
+
+export function resolveCallerTeamLead(rawAgentName: string | undefined): CallerTeamLead {
+  if (typeof rawAgentName !== "string") {
+    return { isEligibleForTeamLead: false }
+  }
+
+  const displayName = stripAgentListSortPrefix(rawAgentName).trim()
+  if (!displayName) {
+    return { isEligibleForTeamLead: false }
+  }
+
+  const agentTypeId = getAgentConfigKey(displayName)
+  const eligibility = AGENT_ELIGIBILITY_REGISTRY[agentTypeId]
+  if (!eligibility || eligibility.verdict === "hard-reject") {
+    return {
+      displayName,
+      isEligibleForTeamLead: false,
+    }
+  }
+
+  return {
+    agentTypeId,
+    displayName,
+    isEligibleForTeamLead: true,
+  }
+}
+
+export function shouldReuseCallerLeadSession(spec: TeamSpec, callerAgentTypeId: string | undefined): boolean {
+  if (callerAgentTypeId === undefined) {
+    return false
+  }
+
+  if (spec.leadAgentId === undefined) {
+    return false
+  }
+
+  return true
+}