新增: 跨会话召回四层架构与脉络卡

- 会话终态提炼: 删除前+停靠双挂点,快照与清水位同临界区
- 目标快照: 恢复引导按最终有效意图生成,旧目标不复活
- 知识检索项目维度软排序,WorkingContext 持久化迁移
- 脉络卡: published 知识按项目聚合纯读侧,带入上下文经输入框显式注入
- 压缩与缓存能力在主循环/子代理/提示词三面接线
- 两份专项设计文档与看板销账

src/components/ai/ContextBriefsCard.vue

@@ -0,0 +1,152 @@
+<template>
+  <!-- 脉络卡:同项目近期决策摘要,纯读侧。用户点「带入上下文」向输入框投递追加文本,
+       由用户编辑后自行发送——注入决策权在用户,不触碰 L3 召回铁律。 -->
+  <div class="ctx-briefs">
+    <button
+      class="ctx-briefs-toggle"
+      :title="t('aiChat.contextBriefsToggle')"
+      @click="toggle"
+    >
+      <svg
+        aria-hidden="true" width="11" height="11" viewBox="0 0 24 24" fill="none"
+        stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"
+        :style="{ transform: expanded ? 'rotate(90deg)' : 'none', transition: 'transform .15s' }"
+      ><polyline points="9 18 15 12 9 6"/></svg>
+      <span>{{ t('aiChat.contextBriefsTitle') }}</span>
+      <span v-if="!expanded && totalBriefs > 0" class="ctx-briefs-count">{{ totalBriefs }}</span>
+    </button>
+    <div v-if="expanded" class="ctx-briefs-body">
+      <div v-if="loading" class="ctx-briefs-empty">{{ t('aiChat.contextBriefsLoading') }}</div>
+      <div v-else-if="groups.length === 0" class="ctx-briefs-empty">{{ t('aiChat.contextBriefsEmpty') }}</div>
+      <div v-for="g in groups" v-else :key="g.source_project" class="ctx-briefs-group">
+        <div class="ctx-briefs-project">{{ g.source_project }}</div>
+        <div v-for="b in g.briefs" :key="g.source_project + b.title" class="ctx-briefs-item">
+          <div class="ctx-briefs-item-title">{{ b.title }}</div>
+          <div class="ctx-briefs-item-summary">{{ b.summary }}</div>
+          <button
+            class="ctx-briefs-bring"
+            :title="t('aiChat.contextBriefsBringIn')"
+            @click="bringIn(g, b)"
+          >{{ t('aiChat.contextBriefsBringIn') }}</button>
+        </div>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, computed } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { aiApi } from '../../api/ai'
+import { useAiStore } from '../../stores/ai'
+import { pushConvDraftAppend } from '../../composables/ai/aiShared'
+
+interface ContextBrief {
+  title: string
+  summary: string
+  source_ref: string | null
+  source_project: string | null
+  reuse_count: number
+}
+interface ProjectBriefs {
+  source_project: string
+  briefs: ContextBrief[]
+}
+
+const { t } = useI18n()
+const store = useAiStore()
+
+const expanded = ref(false)
+const loading = ref(false)
+const groups = ref<ProjectBriefs[]>([])
+
+const totalBriefs = computed(() => groups.value.reduce((n, g) => n + g.briefs.length, 0))
+
+async function toggle() {
+  expanded.value = !expanded.value
+  if (expanded.value && groups.value.length === 0) {
+    loading.value = true
+    try {
+      groups.value = await aiApi.listContextBriefs()
+    } catch {
+      groups.value = []
+    } finally {
+      loading.value = false
+    }
+  }
+}
+
+/** 「带入上下文」= 向当前会话输入框投递追加文本(ChatInput 以实时内容为基底合并),
+ *  用户编辑确认后自行发送——注入决策权在用户,不触碰 L3 召回铁律 */
+function bringIn(g: ProjectBriefs, b: ContextBrief) {
+  const convId = store.state.activeConversationId
+  if (!convId) return
+  pushConvDraftAppend(convId, `参考项目「${g.source_project}」的既有结论「${b.title}」:${b.summary}`)
+}
+</script>
+
+<style scoped>
+.ctx-briefs {
+  border-bottom: 1px solid var(--border, #e0e0e0);
+  padding: 4px 10px;
+  font-size: 12px;
+}
+.ctx-briefs-toggle {
+  display: flex;
+  align-items: center;
+  gap: 5px;
+  width: 100%;
+  padding: 3px 2px;
+  border: none;
+  background: none;
+  color: var(--text-secondary, #666);
+  cursor: pointer;
+  font-size: 12px;
+}
+.ctx-briefs-count {
+  background: var(--accent-soft, rgba(64, 128, 255, 0.15));
+  color: var(--accent, #4080ff);
+  border-radius: 8px;
+  padding: 0 6px;
+  font-size: 11px;
+}
+.ctx-briefs-body {
+  max-height: 220px;
+  overflow-y: auto;
+  padding-bottom: 4px;
+}
+.ctx-briefs-empty {
+  color: var(--text-tertiary, #999);
+  padding: 6px 2px;
+}
+.ctx-briefs-project {
+  font-weight: 600;
+  color: var(--text-primary, #333);
+  padding: 5px 2px 2px;
+}
+.ctx-briefs-item {
+  padding: 4px 2px;
+  border-top: 1px dashed var(--border, #eee);
+}
+.ctx-briefs-item-title {
+  font-weight: 500;
+  color: var(--text-primary, #333);
+}
+.ctx-briefs-item-summary {
+  color: var(--text-secondary, #666);
+  margin: 2px 0;
+  line-height: 1.4;
+}
+.ctx-briefs-bring {
+  border: 1px solid var(--border, #ddd);
+  background: none;
+  color: var(--accent, #4080ff);
+  border-radius: 4px;
+  padding: 1px 8px;
+  font-size: 11px;
+  cursor: pointer;
+}
+.ctx-briefs-bring:hover {
+  background: var(--accent-soft, rgba(64, 128, 255, 0.1));
+}
+</style>