Fix conversation folder search targeting

src/lib/boss-projections.ts

@@ -45,6 +45,7 @@ export interface ConversationItem {
   folderKey?: string;
   threadCount?: number;
   searchAliases?: string[];
+  searchTargetProjectIds?: string[];
   preview: string;
   lastMessagePreview: string;
   activityIconCount: number;
@@ -470,14 +471,19 @@ function sortConversationItems(items: ConversationItem[]) {
 
 function buildFolderSearchAliases(items: ConversationItem[]) {
   const aliases: string[] = [];
-  const seen = new Set<string>();
+  const targetProjectIds: string[] = [];
   for (const item of items) {
     const alias = (item.threadTitle?.trim() || item.projectTitle?.trim() || "").trim();
-    if (!alias || seen.has(alias)) continue;
+    if (!alias) continue;
     aliases.push(alias);
-    seen.add(alias);
+    targetProjectIds.push(item.projectId);
   }
-  return aliases.length > 0 ? aliases : undefined;
+  return aliases.length > 0
+    ? {
+        aliases,
+        targetProjectIds,
+      }
+    : undefined;
 }
 
 export function getConversationItems(state: BossState): ConversationItem[] {
@@ -541,6 +547,7 @@ export function getConversationHomeItems(state: BossState): ConversationItem[] {
         return b.latestReplyAt.localeCompare(a.latestReplyAt);
       })[0];
     const recentThreadLabel = latestItem.threadTitle.trim();
+    const searchAliases = buildFolderSearchAliases(items);
     passthrough.push({
       conversationId: `folder-${folderKey}`,
       conversationType: "folder_archive",
@@ -554,7 +561,12 @@ export function getConversationHomeItems(state: BossState): ConversationItem[] {
       folderLabel: recentThreadLabel ? `${items.length} 个线程 · 最近：${recentThreadLabel}` : `${items.length} 个线程`,
       folderKey,
       threadCount: items.length,
-      searchAliases: buildFolderSearchAliases(items),
+      ...(searchAliases
+        ? {
+            searchAliases: searchAliases.aliases,
+            searchTargetProjectIds: searchAliases.targetProjectIds,
+          }
+        : {}),
       preview:
         latestItem.preview || `包含 ${items.length} 个线程，最近活跃：《${latestItem.threadTitle}》`,
       lastMessagePreview: