refactor(prompt-callers): migrate shared and cli dispatch

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

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

src/shared/model-suggestion-retry.ts

@@ -6,8 +6,7 @@ import {
   type PromptRetryOptions,
 } from "./prompt-timeout-context"
 import {
-  promptAfterSessionIdle,
-  promptAsyncAfterSessionIdle,
+  dispatchInternalPrompt,
   releasePromptAsyncReservation,
 } from "./prompt-async-gate"
 
@@ -100,7 +99,8 @@ export async function promptWithModelSuggestionRetry(
   const timeoutContext = createPromptTimeoutContext(args, timeoutMs)
 
   try {
-    const promptResult = await promptAsyncAfterSessionIdle({
+    const promptResult = await dispatchInternalPrompt({
+      mode: "async",
       client,
       sessionID: args.path.id,
       input: {
@@ -140,7 +140,8 @@ export async function promptSyncWithModelSuggestionRetry(
   try {
     const timeoutContext = createPromptTimeoutContext(args, timeoutMs)
     try {
-      const promptResult = await promptAfterSessionIdle({
+      const promptResult = await dispatchInternalPrompt({
+        mode: "sync",
         client,
         sessionID: args.path.id,
         input: {
@@ -197,7 +198,8 @@ export async function promptSyncWithModelSuggestionRetry(
 
     const timeoutContext = createPromptTimeoutContext(retryArgs, timeoutMs)
     try {
-      const promptResult = await promptAfterSessionIdle({
+      const promptResult = await dispatchInternalPrompt({
+        mode: "sync",
         client,
         sessionID: retryArgs.path.id,
         input: {

src/shared/session-route.ts

@@ -3,7 +3,7 @@ import {
   promptSyncWithModelSuggestionRetry,
   promptWithModelSuggestionRetry,
 } from "./model-suggestion-retry"
-import { promptAsyncAfterSessionIdle } from "./prompt-async-gate"
+import { dispatchInternalPrompt } from "./prompt-async-gate"
 
 type OpencodeClient = PluginInput["client"]
 
@@ -59,7 +59,8 @@ export function promptAsyncInDirectory(
     return Promise.reject(new Error("session id is required for routed promptAsync"))
   }
 
-  return promptAsyncAfterSessionIdle({
+  return dispatchInternalPrompt({
+    mode: "async",
     client,
     sessionID,
     input: routedArgs,