fix(terminal): contain transient resize failures

src/index.ts

@@ -41,7 +41,7 @@ import { launchExternal } from './open-external.ts'
 import * as git from './git.ts'
 import { SettingsConflictError, settingsNamespace, type SettingsNamespace } from '@deepseek-ai/dsh-settings'
 import { defaultShell, ensureSpawnHelper, PtyManager, shellDisplayName } from './pty-manager.ts'
-import { AgentPtyRegistry, clampDims, type AgentTerminalHandle } from './agent-pty.ts'
+import { AgentPtyRegistry, tryResizePty, type AgentTerminalHandle } from './agent-pty.ts'
 import {
   DSH_NODE_PTY_RANGE,
   depsStatus,
@@ -1199,8 +1199,7 @@ async function attachTerminal(
         && control.type === 'resize'
         && typeof control.cols === 'number' && typeof control.rows === 'number'
       ) {
-        const dims = clampDims(control.cols, control.rows)
-        handle.pty.resize(dims.cols, dims.rows)
+        tryResizePty(handle.pty, control.cols, control.rows)
       } else {
         handle.pty.write(text)
       }
@@ -1268,8 +1267,7 @@ function pumpAgentTerminal(
       && control.type === 'resize'
       && typeof control.cols === 'number' && typeof control.rows === 'number'
     ) {
-      const dims = clampDims(control.cols, control.rows)
-      handle.pty.resize(dims.cols, dims.rows)
+      tryResizePty(handle.pty, control.cols, control.rows)
     } else if (control === null) {
       // Raw text input (a JSON-looking string the pty would have received
       // verbatim is reachable in theory but is exotic for an agent terminal;