fix(web): retire session archive UI and API, restore archived rows

Remove archive/restore from the session menu and drop archived=1 listing. PATCH still accepts archived_at from old bundles then ignores it. A forward migration clears archived_at without bumping updated_at. Delete stays unchanged.

frontend/src/app/api/sessions/[id]/route.ts

@@ -20,6 +20,10 @@ function payloadHasMessages(payload: unknown): payload is { messages: unknown }
   return Boolean(payload && typeof payload === "object" && !Array.isArray(payload) && "messages" in payload);
 }
 
+function payloadHasIgnoredArchive(payload: unknown): boolean {
+  return Boolean(payload && typeof payload === "object" && !Array.isArray(payload) && "archived_at" in payload);
+}
+
 function ignoredMessageCount(payload: { messages: unknown }) {
   return Array.isArray(payload.messages) ? payload.messages.length : 0;
 }
@@ -81,7 +85,7 @@ export async function PATCH(request: Request, context: RouteContext) {
     if (!values && modelPatch.success) {
       values = { ...modelPatch.data };
     }
-    if (!values && payloadHasMessages(payload)) {
+    if (!values && (payloadHasMessages(payload) || payloadHasIgnoredArchive(payload))) {
       return NextResponse.json({ ok: true });
     }
     if (!values) {

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

@@ -11,12 +11,11 @@ import { isSupabaseConfigurationError } from "@/lib/supabase/config";
 import { createServerSupabaseClient } from "@/lib/supabase/server";
 import {
   clampSessionLimit,
-  isArchivedSessionQuery,
   nextSessionCursor,
   parseSessionCursor,
   sessionCursorFilter,
 } from "@/lib/session-cursor";
-import { applyArchiveFilter, excludeEmptyConsultations } from "@/lib/session-list-filter";
+import { excludeEmptyConsultations } from "@/lib/session-list-filter";
 
 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";
 
@@ -24,7 +23,6 @@ export async function GET(request: Request) {
   try {
     const url = new URL(request.url);
     const limit = clampSessionLimit(url.searchParams.get("limit"));
-    const archived = isArchivedSessionQuery(url.searchParams.get("archived"));
     const beforeRaw = url.searchParams.get("before");
     const cursor = parseSessionCursor(beforeRaw);
     if (beforeRaw && !cursor) {
@@ -35,14 +33,12 @@ export async function GET(request: Request) {
     if (authError || !user) return NextResponse.json({ error: "请先登录" }, { status: 401 });
 
     let pageQuery = excludeEmptyConsultations(
-      applyArchiveFilter(
-        supabase
-          .from("chat_sessions")
-          .select(SESSION_LIST_COLUMNS)
-          .eq("user_id", user.id)
-          .eq("pinned", false),
-        archived,
-      ),
+      supabase
+        .from("chat_sessions")
+        .select(SESSION_LIST_COLUMNS)
+        .eq("user_id", user.id)
+        .eq("pinned", false)
+        .is("archived_at", null),
     )
       .order("updated_at", { ascending: false })
       .order("id", { ascending: false })
@@ -56,14 +52,12 @@ export async function GET(request: Request) {
     let pinnedRows: typeof pageRows = [];
     if (!cursor) {
       const { data: pinnedData, error: pinnedError } = await excludeEmptyConsultations(
-        applyArchiveFilter(
-          supabase
-            .from("chat_sessions")
-            .select(SESSION_LIST_COLUMNS)
-            .eq("user_id", user.id)
-            .eq("pinned", true),
-          archived,
-        ),
+        supabase
+          .from("chat_sessions")
+          .select(SESSION_LIST_COLUMNS)
+          .eq("user_id", user.id)
+          .eq("pinned", true)
+          .is("archived_at", null),
       )
         .order("updated_at", { ascending: false })
         .order("id", { ascending: false });