继续收口暗色弹窗底部动作区

新增 PlatformDarkModalFooter 统一 dark modal footer 的布局壳
接入 NPC 弹窗、选择定制弹窗、任务更新弹层与物品详情 footer
补充组件级与弹窗集成测试并更新收口计划和共享决策记录

src/components/rpg-runtime-panels/RpgAdventurePanelOverlays.tsx

@@ -46,6 +46,7 @@ import {
   UI_CHROME,
 } from '../../uiAssets';
 import { PlatformActionButton } from '../common/PlatformActionButton';
+import { PlatformDarkModalFooter } from '../common/PlatformDarkModalFooter';
 import { PlatformEmptyState } from '../common/PlatformEmptyState';
 import { PlatformPillBadge } from '../common/PlatformPillBadge';
 import type { PlatformPillBadgeTone } from '../common/platformPillBadgeModel';
@@ -1025,7 +1026,10 @@ export function RpgAdventurePanelOverlays({
                 />
               </div>
 
-              <div className="flex items-center justify-end gap-2 border-t border-white/10 px-4 py-3 sm:px-5">
+              <PlatformDarkModalFooter
+                gap="sm"
+                data-testid="adventure-goal-panel-footer"
+              >
                 {goalStack.activeGoal?.sourceKind === 'quest' ||
                 goalStack.immediateStepGoal?.sourceKind === 'quest' ? (
                   <PlatformActionButton
@@ -1052,7 +1056,7 @@ export function RpgAdventurePanelOverlays({
                 >
                   知道了
                 </PlatformActionButton>
-              </div>
+              </PlatformDarkModalFooter>
             </motion.div>
           </motion.div>
         )}