From 9520d9328c7a70b120af3f85a63f66423685f16a Mon Sep 17 00:00:00 2001
From: kang <wankang2050@gmail.com>
Date: Thu, 21 May 2026 02:30:46 +0800
Subject: [PATCH] auto-save 2026-05-21 02:30 (~2)

---
 .memory/worklog.json |  7 +++++++
 src/app/page.tsx     | 45 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+)

diff --git a/.memory/worklog.json b/.memory/worklog.json
index d429e37..43b82ec 100644
--- a/.memory/worklog.json
+++ b/.memory/worklog.json
@@ -1881,6 +1881,13 @@
       "message": "auto-save 2026-05-21 02:19 (~2)",
       "hash": "da12ed0",
       "files_changed": 2
+    },
+    {
+      "ts": "2026-05-21T02:25:21+08:00",
+      "type": "commit",
+      "message": "auto-save 2026-05-21 02:25 (~2)",
+      "hash": "7524b3c",
+      "files_changed": 2
     }
   ]
 }
diff --git a/src/app/page.tsx b/src/app/page.tsx
index 6a49f76..ae5cdc2 100644
--- a/src/app/page.tsx
+++ b/src/app/page.tsx
@@ -58,6 +58,51 @@ const PACK_BRIEF_DESCRIPTIONS: Record<PackKind, string> = {
   marketing: '白底商品图 · 场景图 · 细节图 · 社媒图',
 };
 
+const DEFAULT_ASSET_PANEL = 'pack-patent';
+const VALID_ASSET_PANELS = new Set([
+  ...PACK_ORDER.map(kind => `pack-${kind}`),
+  'pack-text',
+  'pack-video',
+]);
+const LAST_SESSION_STORAGE_KEY = 'ai-toy:last-session-id';
+const LAST_PANEL_STORAGE_KEY = 'ai-toy:last-asset-panel';
+
+function normalizeAssetPanel(panel?: string | null) {
+  return panel && VALID_ASSET_PANELS.has(panel) ? panel : DEFAULT_ASSET_PANEL;
+}
+
+function readPersistedProjectState() {
+  if (typeof window === 'undefined') {
+    return { sessionId: null as string | null, panel: DEFAULT_ASSET_PANEL };
+  }
+  const params = new URLSearchParams(window.location.search);
+  return {
+    sessionId: params.get('session') || window.localStorage.getItem(LAST_SESSION_STORAGE_KEY),
+    panel: normalizeAssetPanel(params.get('panel') || window.localStorage.getItem(LAST_PANEL_STORAGE_KEY)),
+  };
+}
+
+function writePersistedProjectState(sessionId: string, panel: string) {
+  if (typeof window === 'undefined') return;
+  const normalizedPanel = normalizeAssetPanel(panel);
+  window.localStorage.setItem(LAST_SESSION_STORAGE_KEY, sessionId);
+  window.localStorage.setItem(LAST_PANEL_STORAGE_KEY, normalizedPanel);
+  const url = new URL(window.location.href);
+  url.searchParams.set('session', sessionId);
+  url.searchParams.set('panel', normalizedPanel);
+  window.history.replaceState(null, '', `${url.pathname}${url.search}${url.hash}`);
+}
+
+function clearPersistedProjectState() {
+  if (typeof window === 'undefined') return;
+  window.localStorage.removeItem(LAST_SESSION_STORAGE_KEY);
+  window.localStorage.removeItem(LAST_PANEL_STORAGE_KEY);
+  const url = new URL(window.location.href);
+  url.searchParams.delete('session');
+  url.searchParams.delete('panel');
+  window.history.replaceState(null, '', `${url.pathname}${url.search}${url.hash}`);
+}
+
 function ProjectStat({ label, value, tone }: { label: string; value: string | number; tone?: 'accent' | 'soft' }) {
   return (
     <div className={`project-stat ${tone === 'accent' ? 'project-stat--accent' : ''}`}>