继续收口首页导航行与暗色弹窗底栏

将首页排行行与分类行切换为 PlatformNavigableListItem
将 NPC 交易详情与地图切场确认底栏收口到 PlatformDarkModalFooter
补充首页与弹窗回归测试并更新 PlatformUiKit 收口计划与共享决策记录

src/components/NpcModals.tsx

@@ -560,17 +560,21 @@ export function NpcModals({ gameState, npcUi }: NpcModalsProps) {
                 </PlatformStatusMessage>
               )}
 
-              <div className="flex justify-end">
-                <PlatformActionButton
-                  surface="editorDark"
-                  tone="secondary"
-                  size="xs"
-                  onClick={() => setTradeDetail(null)}
-                >
-                  关闭
-                </PlatformActionButton>
-              </div>
             </div>
+
+            <PlatformDarkModalFooter
+              padding="roomy"
+              data-testid="npc-trade-detail-footer"
+            >
+              <PlatformActionButton
+                surface="editorDark"
+                tone="secondary"
+                size="xs"
+                onClick={() => setTradeDetail(null)}
+              >
+                关闭
+              </PlatformActionButton>
+            </PlatformDarkModalFooter>
           </motion.div>
         </motion.div>
       )}