fix(mobile): preserve prompt refusal during draft clear

mobile/src/session/mobile-native-chat-send.test.ts

@@ -340,7 +340,7 @@ describe('clearMobileNativeChatInput', () => {
     const clearInput = buildAgentTuiClearInputForText('Linked Linear issue: ABC-123\nhttps://x')
     await expect(
       clearMobileNativeChatInput({ client, terminal: 'term', clearInput })
-    ).resolves.toBe(true)
+    ).resolves.toBe('accepted')
     expect(params(client)).toMatchObject({ text: clearInput, enter: false })
   })
 
@@ -353,7 +353,26 @@ describe('clearMobileNativeChatInput', () => {
     })
     await expect(
       clearMobileNativeChatInput({ client, terminal: 'term', clearInput: '\x15' })
-    ).resolves.toBe(false)
+    ).resolves.toBe('rejected')
+  })
+
+  it('preserves an interactive prompt rejection from a guarded clear', async () => {
+    const client = clientWithResponse({
+      id: 'request',
+      ok: true,
+      result: { send: { accepted: false, refusedReason: 'interactive-prompt' } },
+      _meta: { runtimeId: 'runtime' }
+    })
+
+    await expect(
+      clearMobileNativeChatInput({
+        client,
+        terminal: 'term',
+        clearInput: '\x15',
+        guardInteractivePrompt: true
+      })
+    ).resolves.toBe('interactive-prompt')
+    expect(params(client)).toMatchObject({ nativeChat: true })
   })
 
   it('refuses to start an underfunded clear rather than half-clearing', async () => {
@@ -365,7 +384,7 @@ describe('clearMobileNativeChatInput', () => {
         clearInput: '\x15',
         deadline: Date.now() + 10
       })
-    ).resolves.toBe(false)
+    ).resolves.toBe('rejected')
     expect(client.sendRequest).not.toHaveBeenCalled()
   })
 })

mobile/src/session/mobile-native-chat-send.ts

@@ -40,6 +40,7 @@ type MobileNativeChatSendArgs = {
  *  desktop (ack loss after a write, or a cutover that cannot tell whether the
  *  frame was written) — callers must not present it as a definite send failure. */
 export type MobileNativeChatSendOutcome = 'accepted' | 'rejected' | 'unknown' | 'interactive-prompt'
+export type MobileNativeChatClearOutcome = Exclude<MobileNativeChatSendOutcome, 'unknown'>
 
 /** Without an explicit timeout `sendRequest` waits for reconnect indefinitely, and
  *  the composer holds `sending` (send arrow dimmed, no error) for as long as it
@@ -119,11 +120,11 @@ export async function clearMobileNativeChatInput(args: {
   guardInteractivePrompt?: boolean
   mobileClient?: MobileTerminalClient
   deadline?: number
-}): Promise<boolean> {
+}): Promise<MobileNativeChatClearOutcome> {
   const timeoutMs =
     args.deadline === undefined ? MOBILE_NATIVE_CHAT_SEND_TIMEOUT_MS : args.deadline - Date.now()
   if (timeoutMs < MOBILE_NATIVE_CHAT_MIN_WRITE_TIMEOUT_MS) {
-    return false
+    return 'rejected'
   }
   try {
     const response = await args.client.sendRequest(
@@ -137,9 +138,14 @@ export async function clearMobileNativeChatInput(args: {
       },
       { timeoutMs, budgetSpansConnect: true }
     )
-    return isTerminalSendRpcAccepted(response)
+    if (isTerminalSendRpcAccepted(response)) {
+      return 'accepted'
+    }
+    return getTerminalSendRpcRefusedReason(response) === 'interactive-prompt'
+      ? 'interactive-prompt'
+      : 'rejected'
   } catch {
     // A failed clear must not send the body on top of an uncleared line.
-    return false
+    return 'rejected'
   }
 }

mobile/src/session/use-mobile-native-chat-message-send.test.ts

@@ -90,7 +90,7 @@ describe('useMobileNativeChatMessageSend', () => {
     sendWithOutcome.mockReset()
     sendWithOutcome.mockResolvedValue('accepted')
     clearInputWrite.mockReset()
-    clearInputWrite.mockResolvedValue(true)
+    clearInputWrite.mockResolvedValue('accepted')
     acceptSend.mockReset()
     holdUnconfirmedSend.mockReset()
     restoreRejectedDraft.mockReset()
@@ -131,7 +131,7 @@ describe('useMobileNativeChatMessageSend', () => {
 
   it('aborts without sending the body when the clear is rejected', async () => {
     // Sending on top of an uncleared line is exactly the concatenation bug.
-    clearInputWrite.mockResolvedValue(false)
+    clearInputWrite.mockResolvedValue('rejected')
     mount(() => ({ text: DRAFT, createdAt: 1 }))
     let result: boolean | undefined
     await act(async () => {
@@ -141,6 +141,22 @@ describe('useMobileNativeChatMessageSend', () => {
     expect(sendWithOutcome).not.toHaveBeenCalled()
   })
 
+  it('reports an interactive prompt rejected while clearing a seeded launch draft', async () => {
+    clearInputWrite.mockResolvedValue('interactive-prompt')
+    mount(() => ({ text: DRAFT, createdAt: 1 }))
+
+    let result: boolean | undefined
+    await act(async () => {
+      result = await api!.send('hello')
+    })
+
+    expect(result).toBe(false)
+    expect(restoreRejectedDraft).toHaveBeenCalledTimes(1)
+    expect(sendWithOutcome).not.toHaveBeenCalled()
+    expect(acceptSend).not.toHaveBeenCalled()
+    expect(onSendError).toHaveBeenCalledWith('Finish the terminal prompt before sending')
+  })
+
   it('drops the body write\u2019s own Ctrl+U prefix once the dedicated clear ran', async () => {
     // A Ctrl+U written immediately before body text in the SAME write arrives as
     // a literal control character, so it would head the received message.

mobile/src/session/use-mobile-native-chat-message-send.ts

@@ -135,7 +135,7 @@ export function useMobileNativeChatMessageSend(args: {
       // than pasting on top of an uncleared line.
       const seededLaunchDraft = readSeededLaunchDraftSeed()
       if (seededLaunchDraft && !images?.length) {
-        const cleared = await clearMobileNativeChatInput({
+        const clearOutcome = await clearMobileNativeChatInput({
           client,
           terminal: handle,
           clearInput: buildAgentTuiClearInputForText(seededLaunchDraft.text),
@@ -145,11 +145,15 @@ export function useMobileNativeChatMessageSend(args: {
             ? { mobileClient: { id: deviceTokenRef.current, type: 'mobile' } }
             : {})
         })
-        if (!cleared) {
+        if (clearOutcome !== 'accepted') {
           if (syncComposer) {
             restoreRejectedDraft(origin, text)
           }
-          onSendError('Message not sent')
+          onSendError(
+            clearOutcome === 'interactive-prompt'
+              ? 'Finish the terminal prompt before sending'
+              : 'Message not sent'
+          )
           return 'rejected'
         }
       }