Fix: allow typing in pending user input when environment is temporarily unavailable

The disabled condition on the composer textarea unconditionally disabled
input when environmentUnavailable was set, even when a pending user input
was active. This prevented users from typing custom answers during brief
disconnects, even though those answers are queued locally. Now the
environmentUnavailable check is skipped when activePendingProgress is
present, matching the placeholder logic's priority order.

Author: cursoragent

apps/web/src/components/chat/ChatComposer.tsx

@@ -1989,7 +1989,9 @@ export const ChatComposer = memo(
                             : "Ask anything, @tag files/folders, or use / to show available commands"
                 }
                 disabled={
-                  isConnecting || isComposerApprovalState || environmentUnavailable !== null
+                  isConnecting ||
+                  isComposerApprovalState ||
+                  (environmentUnavailable !== null && activePendingProgress === null)
                 }
               />
             </div>