fix: preserve exploration tool history and cap context budget

apps/showcase_ui/src/app/components/agent-stream/agent-stream.component.html

@@ -401,7 +401,7 @@ limitations under the License.
                 @if (runInfoContextPercent() !== null) {
                   <span class="run-info-value">
                     {{ runInfoContextPercent() }}%
-                    <span class="run-info-sub-inline">/ {{ formatRunTokens(runUsage()?.operator_context_window_tokens) }}</span>
+                    <span class="run-info-sub-inline">/ {{ formatRunTokens(runInfoContextWindow()) }}</span>
                   </span>
                 } @else {
                   <span class="run-info-value is-muted">—</span>
@@ -425,7 +425,9 @@ limitations under the License.
                 <span class="run-info-label">屏幕识别</span>
                 <span class="run-info-value">{{ runTuningLabel('explore', runInfoTuning()?.explorer_mode) }}</span>
               </div>
-            } @else {
+            } @else if (runInfoMode() === 'explore') {
+              <div class="run-info-note">探索支持对话指导与人工示范，模型和时限使用独立的探索设置。</div>
+            } @else if (runInfoMode() === 'flash') {
               <div class="run-info-note">Flash 无需额外设置。</div>
             }
           </div>