feat: soften quota messaging

ai_knowledge_base_v2/apps/user-client/src/components/SessionQuota.vue

@@ -24,8 +24,18 @@ const hasEntitlement = computed(() => Boolean(props.entitlement));
 const displayUsed = computed(() => props.entitlement?.monthlyTopicUsed ?? props.used);
 const displayLimit = computed(() => props.entitlement?.monthlyTopicLimit ?? props.limit);
 const exhausted = computed(() => displayLimit.value !== null && displayLimit.value > 0 && displayUsed.value >= displayLimit.value);
-const title = computed(() => props.entitlement ? "本月主题额度" : "当前会话额度");
-const limitText = computed(() => displayLimit.value === null ? "不限" : String(displayLimit.value));
+const nearLimit = computed(() => displayLimit.value !== null && displayLimit.value > 0 && displayUsed.value / displayLimit.value >= 0.8);
+const title = computed(() => props.entitlement ? "本月主题使用情况" : "今日陪伴使用情况");
+const usageText = computed(() => {
+  if (displayLimit.value === null) return props.entitlement ? "本月不限" : "不限";
+  if (props.entitlement) return `已使用 ${displayUsed.value}/${displayLimit.value} 个主题`;
+  return `今日 ${displayUsed.value}/${displayLimit.value}`;
+});
+const guidanceText = computed(() => {
+  if (exhausted.value) return "本月深度主题使用较多，建议先完成已有功课；如需继续高频陪伴，可联系运营老师确认权益。";
+  if (nearLimit.value) return "本月深度主题接近上限，可以先沉淀已有主题，再继续新的议题。";
+  return "";
+});
 </script>
 
 <template>
@@ -65,7 +75,8 @@ const limitText = computed(() => displayLimit.value === null ? "不限" : String
       >
         {{ generatingShareDraft ? '生成中' : '分享稿' }}
       </button>
-      <strong>{{ displayUsed }}/{{ limitText }}</strong>
+      <strong>{{ usageText }}</strong>
     </div>
+    <p v-if="guidanceText" class="session-quota-guidance">{{ guidanceText }}</p>
   </section>
 </template>