fix(continuation): auto-continue GPT permission-seeking replies

Resume GPT sessions when the last assistant reply ends in a permission-seeking tail, while honoring stop-continuation and avoiding duplicate continuation across todo and atlas flows.

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

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

src/hooks/gpt-permission-continuation/assistant-message.ts

@@ -0,0 +1,44 @@
+type TextPart = {
+  type?: string
+  text?: string
+}
+
+type MessageInfo = {
+  id?: string
+  role?: string
+  error?: unknown
+  model?: {
+    providerID?: string
+    modelID?: string
+  }
+  providerID?: string
+  modelID?: string
+}
+
+export type SessionMessage = {
+  info?: MessageInfo
+  parts?: TextPart[]
+}
+
+export function getLastAssistantMessage(messages: SessionMessage[]): SessionMessage | null {
+  for (let index = messages.length - 1; index >= 0; index--) {
+    if (messages[index].info?.role === "assistant") {
+      return messages[index]
+    }
+  }
+
+  return null
+}
+
+export function extractAssistantText(message: SessionMessage): string {
+  return (message.parts ?? [])
+    .filter((part) => part.type === "text" && typeof part.text === "string")
+    .map((part) => part.text?.trim() ?? "")
+    .filter(Boolean)
+    .join("\n")
+}
+
+export function isGptAssistantMessage(message: SessionMessage): boolean {
+  const modelID = message.info?.model?.modelID ?? message.info?.modelID
+  return typeof modelID === "string" && modelID.toLowerCase().includes("gpt")
+}