test(rpc): require unconditional terminal afterWrite callbacks

Update exact sendTerminal expectations for the round-2 accepted-write
contract. Preserve beforeWrite expectations, absence of reserveWrite,
byte payloads and call-count checks; require afterWrite to be a function.

Reproduced the requested two-file run: 5 failed, 31 passed. The full RPC
suite exposed the same stale shape in ACK budget/overflow, desktop resize
(including its later retry), and agent-prompt fallback assertions. Update
those too, for 11 assertions across six test files. No production changes.

Validation: ORCA_BACKGROUND_LAUNCH=1 full src/main/runtime/rpc suite:
264 files passed; 2292 tests passed, 1 skipped. Changed-code quality and
staged oxlint/React Doctor/oxfmt checks passed. Ran lint-staged --no-stash
manually to honor checkout safety rather than its default backup hook.

src/main/runtime/rpc/terminal-agent-prompt-send.test.ts

@@ -81,7 +81,7 @@ describe('terminal agent prompt send RPC', () => {
     expect(sendTerminal).toHaveBeenCalledWith(
       'terminal-1',
       { text: 'echo x', enter: true, interrupt: false },
-      { beforeWrite: undefined, signal: undefined }
+      { beforeWrite: undefined, signal: undefined, afterWrite: expect.any(Function) }
     )
     expect(sendTerminalAgentPrompt).not.toHaveBeenCalled()
   })

src/main/runtime/rpc/terminal-multiplex-ack-output-budget.test.ts

@@ -241,11 +241,15 @@ describe('terminal multiplex RPC', () => {
       )!
     )
     await vi.waitFor(() =>
-      expect(runtime.sendTerminal).toHaveBeenCalledWith('terminal-1', {
-        text: 'still interactive\r',
-        enter: false,
-        interrupt: false
-      })
+      expect(runtime.sendTerminal).toHaveBeenCalledWith(
+        'terminal-1',
+        {
+          text: 'still interactive\r',
+          enter: false,
+          interrupt: false
+        },
+        { afterWrite: expect.any(Function) }
+      )
     )
 
     handlers.get(16)?.(
@@ -434,11 +438,15 @@ describe('terminal multiplex RPC', () => {
       )!
     )
     await vi.waitFor(() =>
-      expect(runtime.sendTerminal).toHaveBeenCalledWith('terminal-8', {
-        text: 'remote-still-interactive\r',
-        enter: false,
-        interrupt: false
-      })
+      expect(runtime.sendTerminal).toHaveBeenCalledWith(
+        'terminal-8',
+        {
+          text: 'remote-still-interactive\r',
+          enter: false,
+          interrupt: false
+        },
+        { afterWrite: expect.any(Function) }
+      )
     )
 
     const frameCountBeforeAck = binaryFrames.length

src/main/runtime/rpc/terminal-multiplex-ack-overflow-recovery.test.ts

@@ -413,11 +413,15 @@ describe('terminal multiplex RPC', () => {
       )!
     )
     await vi.waitFor(() =>
-      expect(runtime.sendTerminal).toHaveBeenCalledWith('terminal-1', {
-        text: 'still interactive\r',
-        enter: false,
-        interrupt: false
-      })
+      expect(runtime.sendTerminal).toHaveBeenCalledWith(
+        'terminal-1',
+        {
+          text: 'still interactive\r',
+          enter: false,
+          interrupt: false
+        },
+        { afterWrite: expect.any(Function) }
+      )
     )
 
     binaryFrames.splice(0)

src/main/runtime/rpc/terminal-multiplex-desktop-resize-routing.test.ts

@@ -206,11 +206,15 @@ describe('terminal multiplex RPC', () => {
         )
       )
       await vi.waitFor(() =>
-        expect(runtime.sendTerminal).toHaveBeenCalledWith('terminal-1', {
-          text: 'ls\r',
-          enter: false,
-          interrupt: false
-        })
+        expect(runtime.sendTerminal).toHaveBeenCalledWith(
+          'terminal-1',
+          {
+            text: 'ls\r',
+            enter: false,
+            interrupt: false
+          },
+          { afterWrite: expect.any(Function) }
+        )
       )
       const sentAfterSuccessfulClaim = vi.mocked(runtime.sendTerminal).mock.calls.length
       vi.mocked(runtime.updateRemoteDesktopViewer).mockResolvedValueOnce(false)
@@ -248,11 +252,15 @@ describe('terminal multiplex RPC', () => {
         )
       }
       await vi.waitFor(() =>
-        expect(runtime.sendTerminal).toHaveBeenLastCalledWith('terminal-1', {
-          text: 'retry',
-          enter: false,
-          interrupt: false
-        })
+        expect(runtime.sendTerminal).toHaveBeenLastCalledWith(
+          'terminal-1',
+          {
+            text: 'retry',
+            enter: false,
+            interrupt: false
+          },
+          { afterWrite: expect.any(Function) }
+        )
       )
 
       dataListenerRef.current?.('a')

src/main/runtime/rpc/terminal-multiplex-input-write-rejection.test.ts

@@ -327,11 +327,15 @@ describe('terminal multiplex RPC', () => {
     )
 
     await vi.waitFor(() =>
-      expect(runtime.sendTerminal).toHaveBeenCalledWith('terminal-1', {
-        text: 'echo one\necho two\r\n',
-        enter: false,
-        interrupt: false
-      })
+      expect(runtime.sendTerminal).toHaveBeenCalledWith(
+        'terminal-1',
+        {
+          text: 'echo one\necho two\r\n',
+          enter: false,
+          interrupt: false
+        },
+        { afterWrite: expect.any(Function) }
+      )
     )
 
     runtime.cleanupSubscription('terminal-multiplex:conn-byte-preserving')
@@ -403,11 +407,15 @@ describe('terminal multiplex RPC', () => {
     )
 
     await vi.waitFor(() =>
-      expect(runtime.sendTerminal).toHaveBeenCalledWith('terminal-1', {
-        text: 'printf a\nprintf b\r\n',
-        enter: false,
-        interrupt: false
-      })
+      expect(runtime.sendTerminal).toHaveBeenCalledWith(
+        'terminal-1',
+        {
+          text: 'printf a\nprintf b\r\n',
+          enter: false,
+          interrupt: false
+        },
+        { afterWrite: expect.any(Function) }
+      )
     )
 
     runtime.cleanupSubscription('terminal-1:desktop-1')

src/main/runtime/rpc/terminal-send.test.ts

@@ -370,7 +370,7 @@ describe('terminal send RPC', () => {
     expect(runtime.sendTerminal).toHaveBeenCalledWith(
       'terminal-1',
       { text: '\x1b[3;4R', enter: false, interrupt: false },
-      { beforeWrite: undefined }
+      { beforeWrite: undefined, afterWrite: expect.any(Function) }
     )
     expect(runtime.mobileTookFloor).not.toHaveBeenCalled()
   })
@@ -570,7 +570,7 @@ describe('terminal send RPC', () => {
         enter: false,
         interrupt: false
       },
-      { beforeWrite: undefined }
+      { beforeWrite: undefined, afterWrite: expect.any(Function) }
     )
   })
 
@@ -653,7 +653,7 @@ describe('terminal send RPC', () => {
         enter: true,
         interrupt: false
       },
-      { beforeWrite: expect.any(Function) }
+      { beforeWrite: expect.any(Function), afterWrite: expect.any(Function) }
     )
   })