fix(mobile): pace repeated live-input edits

mobile/src/terminal/use-terminal-live-accessory-input-commit.test.ts

@@ -70,7 +70,7 @@ function createAccessoryInputCommitHarness({
     }
   }
   const applyLiveInputMirror = vi.fn(
-    (_handle: string, _fieldText: string, _composing?: boolean) => {}
+    async (_handle: string, _fieldText: string, _composing?: boolean) => true
   )
   const clearPendingLiveInputCommit = vi.fn(() => {})
   const flushPendingLiveInputText = vi.fn(async (_expectedHandle: string | null) => flushResult)

mobile/src/terminal/use-terminal-live-accessory-input-commit.ts

@@ -21,7 +21,11 @@ export async function getTerminalLiveAccessoryInactiveInputCommitResult(
 
 type TerminalLiveAccessoryInputCommitOptions = {
   readonly activeHandle: string | null
-  readonly applyLiveInputMirror: (handle: string, fieldText: string, composing?: boolean) => void
+  readonly applyLiveInputMirror: (
+    handle: string,
+    fieldText: string,
+    composing?: boolean
+  ) => Promise<boolean>
   readonly clearPendingLiveInputCommit: () => void
   readonly flushPendingLiveInputText: (expectedHandle: string | null) => Promise<boolean>
   readonly heldLiveInputTextRef: RefObject<string>
@@ -84,8 +88,12 @@ export function useTerminalLiveAccessoryInputCommit({
           setLiveInputCapture(editedText)
           liveInputRef.current?.setNativeProps({ text: editedText })
           // Preserve undefined so Android's heuristic hold still settles on its timer.
-          applyLiveInputMirror(activeHandle, editedText, liveInputComposingRef.current)
-          return { kind: 'handled' }
+          const sent = await applyLiveInputMirror(
+            activeHandle,
+            editedText,
+            liveInputComposingRef.current
+          )
+          return sent ? { kind: 'handled' } : { kind: 'suppress-raw' }
         }
         case 'commit-held-then-send': {
           const sent = await sendTerminalLiveControlAfterPendingFlush(

mobile/src/terminal/use-terminal-live-input-commit.test.ts

@@ -190,6 +190,20 @@ describe('terminal live input commit hook', () => {
     await vi.waitFor(() => expect(sent).toEqual(['한']))
   })
 
+  it('Given a failed mirrored Backspace When accessory input commits Then reports failure', async () => {
+    const { handlers, sent } = createTerminalLiveInputCommitHarness({ sendResult: false })
+    changeLiveInput(handlers, 'a', false)
+    await vi.waitFor(() => expect(sent).toEqual(['a']))
+
+    const result = await handlers.handleLiveInputAccessoryBytes({
+      bytes: '\x7f',
+      localEdit: 'backspace'
+    })
+
+    expect(sent).toEqual(['a', '\x7f'])
+    expect(result).toEqual({ kind: 'suppress-raw' })
+  })
+
   it('Given a held syllable When the settle timer elapses Then commits it to the terminal', async () => {
     // Given
     vi.useFakeTimers()

mobile/src/terminal/use-terminal-live-input-commit.ts

@@ -133,7 +133,7 @@ export function useTerminalLiveInputCommit<TTabType extends string>({
       // that differs from the native field text, so the controlled capture must
       // echo the field verbatim; only the PTY mirror sees normalized text.
       setLiveInputCapture(nativeEvent.text)
-      applyLiveInputMirror(
+      void applyLiveInputMirror(
         activeHandle,
         normalizeTerminalTextInput(nativeEvent.text),
         nativeEvent.isComposing

mobile/src/terminal/use-terminal-live-pending-input-flush.ts

@@ -30,7 +30,11 @@ type RunTerminalLiveMirrorStep = (
 ) => Promise<boolean>
 
 type TerminalLivePendingInputFlush = {
-  readonly applyLiveInputMirror: (handle: string, fieldText: string, composing?: boolean) => void
+  readonly applyLiveInputMirror: (
+    handle: string,
+    fieldText: string,
+    composing?: boolean
+  ) => Promise<boolean>
   readonly clearPendingLiveInputCommit: () => void
   readonly flushPendingLiveInputText: (expectedHandle: string | null) => Promise<boolean>
   readonly heldLiveInputTextRef: RefObject<string>
@@ -153,9 +157,8 @@ export function useTerminalLivePendingInputFlush<TTabType extends string>({
   }, [runMirrorStep])
 
   const applyLiveInputMirror = useCallback(
-    (handle: string, fieldText: string, composing?: boolean): void => {
-      void runMirrorStep(handle, fieldText, false, composing)
-    },
+    (handle: string, fieldText: string, composing?: boolean): Promise<boolean> =>
+      runMirrorStep(handle, fieldText, false, composing),
     [runMirrorStep]
   )