fix(web): keep rectification sessions listed and persist chats on first send

Empty-consultation filtering is now session_type scoped so birth-time rows stay in the sidebar. Subtitles use updatedAt with sort/group/cursor. New chats stay local until the first send.

frontend/src/app/api/sessions/route.ts

@@ -16,22 +16,9 @@ import {
   parseSessionCursor,
   sessionCursorFilter,
 } from "@/lib/session-cursor";
-const SESSION_LIST_COLUMNS = "id,title,theme,model_id,session_type,rectification_case_id,chart_profile_id,chart_profile_name,chart_profile_role,created_at,updated_at,pinned,archived_at";
+import { applyArchiveFilter, excludeEmptyConsultations } from "@/lib/session-list-filter";
 
-function excludeEmptyConsultations<Query extends {
-  not: (column: string, operator: string, value: unknown) => Query;
-}>(query: Query): Query {
-  // Empty consultations are `messages = []`. Rectification rows keep an opening
-  // turn, so excluding empty arrays leaves them in the list (BUG-928).
-  return query.not("messages", "eq", []);
-}
-
-function applyArchiveFilter<Query extends {
-  is: (column: string, value: null) => Query;
-  not: (column: string, operator: string, value: null) => Query;
-}>(query: Query, archived: boolean): Query {
-  return archived ? query.not("archived_at", "is", null) : query.is("archived_at", null);
-}
+const SESSION_LIST_COLUMNS = "id,title,theme,model_id,session_type,rectification_case_id,chart_profile_id,chart_profile_name,chart_profile_role,updated_at,pinned,archived_at";
 
 export async function GET(request: Request) {
   try {
@@ -67,7 +54,6 @@ export async function GET(request: Request) {
     if (pageError) return NextResponse.json({ error: "聊天记录暂时无法读取" }, { status: 500 });
 
     let pinnedRows: typeof pageRows = [];
-    let draft: NonNullable<typeof pageRows>[number] | null = null;
     if (!cursor) {
       const { data: pinnedData, error: pinnedError } = await excludeEmptyConsultations(
         applyArchiveFilter(
@@ -83,26 +69,12 @@ export async function GET(request: Request) {
         .order("id", { ascending: false });
       if (pinnedError) return NextResponse.json({ error: "聊天记录暂时无法读取" }, { status: 500 });
       pinnedRows = pinnedData ?? [];
-      if (!archived) {
-        const { data: draftData, error: draftError } = await supabase
-          .from("chat_sessions")
-          .select(SESSION_LIST_COLUMNS)
-          .eq("user_id", user.id)
-          .eq("session_type", "consultation")
-          .eq("messages", [])
-          .is("archived_at", null)
-          .order("updated_at", { ascending: false })
-          .order("id", { ascending: false })
-          .limit(1);
-        if (draftError) return NextResponse.json({ error: "聊天记录暂时无法读取" }, { status: 500 });
-        draft = draftData?.[0] ?? null;
-      }
     }
 
     const nextCursor = nextSessionCursor(pageRows ?? [], limit);
     const page = (pageRows ?? []).slice(0, limit);
     const sessions = cursor ? page : [...(pinnedRows ?? []), ...page];
-    return NextResponse.json({ sessions, nextCursor, draft });
+    return NextResponse.json({ sessions, nextCursor });
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
       return NextResponse.json({ error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" }, { status: 503 });