fix(vscode): restore optimistic question removal on reply/reject

Without optimistic removal the QuestionDock stays mounted with all
buttons disabled until the SSE round-trip completes, making dismiss
and answer clicks appear to do nothing. Re-add immediate removal
after posting the message, matching the pattern used by permissions.

packages/kilo-vscode/webview-ui/src/context/session.tsx

@@ -546,7 +546,7 @@ export const SessionProvider: ParentComponent = (props) => {
       requestID,
       answers,
     })
-    // Removal handled by SSE question.replied event via handleQuestionResolved
+    setQuestions((prev) => prev.filter((q) => q.id !== requestID))
   }
 
   function rejectQuestion(requestID: string) {
@@ -554,7 +554,7 @@ export const SessionProvider: ParentComponent = (props) => {
       type: "questionReject",
       requestID,
     })
-    // Removal handled by SSE question.rejected event via handleQuestionResolved
+    setQuestions((prev) => prev.filter((q) => q.id !== requestID))
   }
 
   function createSession() {