diff --git a/backend/app.py b/backend/app.py
index a5540df..ac2803e 100644
--- a/backend/app.py
+++ b/backend/app.py
@@ -38,6 +38,9 @@ ROOM_REFERENCE_IMAGE = (
     else os.path.join(ROOT_DIR, "assets", "room-reference.png")
 )
 BG_HISTORY_DIR = os.path.join(ROOT_DIR, "assets", "bg-history")
+HOME_FAVORITES_DIR = os.path.join(ROOT_DIR, "assets", "home-favorites")
+HOME_FAVORITES_INDEX_FILE = os.path.join(HOME_FAVORITES_DIR, "index.json")
+HOME_FAVORITES_MAX = 30
 ASSET_POSITIONS_FILE = os.path.join(ROOT_DIR, "asset-positions.json")
 ASSET_DEFAULTS_FILE = os.path.join(ROOT_DIR, "asset-defaults.json")
 RUNTIME_CONFIG_FILE = os.path.join(ROOT_DIR, "runtime-config.json")
@@ -369,7 +372,7 @@ def save_asset_defaults(data):
 def load_runtime_config():
     base = {
         "gemini_api_key": os.getenv("GEMINI_API_KEY") or os.getenv("GOOGLE_API_KEY") or "",
-        "gemini_model": os.getenv("GEMINI_MODEL") or "gemini-3.1-flash-image-preview"
+        "gemini_model": os.getenv("GEMINI_MODEL") or "nanobanana-pro"
     }
     if os.path.exists(RUNTIME_CONFIG_FILE):
         try:
@@ -389,6 +392,31 @@ def save_runtime_config(data):
         json.dump(cfg, f, ensure_ascii=False, indent=2)
 
 
+def _ensure_home_favorites_index():
+    os.makedirs(HOME_FAVORITES_DIR, exist_ok=True)
+    if not os.path.exists(HOME_FAVORITES_INDEX_FILE):
+        with open(HOME_FAVORITES_INDEX_FILE, "w", encoding="utf-8") as f:
+            json.dump({"items": []}, f, ensure_ascii=False, indent=2)
+
+
+def _load_home_favorites_index():
+    _ensure_home_favorites_index()
+    try:
+        with open(HOME_FAVORITES_INDEX_FILE, "r", encoding="utf-8") as f:
+            data = json.load(f)
+            if isinstance(data, dict) and isinstance(data.get("items"), list):
+                return data
+    except Exception:
+        pass
+    return {"items": []}
+
+
+def _save_home_favorites_index(data):
+    _ensure_home_favorites_index()
+    with open(HOME_FAVORITES_INDEX_FILE, "w", encoding="utf-8") as f:
+        json.dump(data, f, ensure_ascii=False, indent=2)
+
+
 def load_join_keys():
     if os.path.exists(JOIN_KEYS_FILE):
         try:
@@ -1322,6 +1350,163 @@ def assets_restore_reference_background():
         return jsonify({"ok": False, "msg": str(e)}), 500
 
 
+@app.route("/assets/restore-last-generated-background", methods=["POST"])
+def assets_restore_last_generated_background():
+    """Restore office_bg_small.webp from latest bg-history snapshot."""
+    guard = _require_asset_editor_auth()
+    if guard:
+        return guard
+    try:
+        target = FRONTEND_PATH / "office_bg_small.webp"
+        if not target.exists():
+            return jsonify({"ok": False, "msg": "office_bg_small.webp 不存在"}), 404
+
+        if not os.path.isdir(BG_HISTORY_DIR):
+            return jsonify({"ok": False, "msg": "暂无历史底图"}), 404
+
+        files = [
+            os.path.join(BG_HISTORY_DIR, x)
+            for x in os.listdir(BG_HISTORY_DIR)
+            if x.startswith("office_bg_small-") and x.endswith(".webp")
+        ]
+        if not files:
+            return jsonify({"ok": False, "msg": "暂无历史底图"}), 404
+
+        latest = max(files, key=lambda p: os.path.getmtime(p))
+
+        bak = target.with_suffix(target.suffix + ".bak")
+        shutil.copy2(target, bak)
+        shutil.copy2(latest, target)
+
+        st = target.stat()
+        return jsonify({
+            "ok": True,
+            "path": "office_bg_small.webp",
+            "size": st.st_size,
+            "from": os.path.relpath(latest, ROOT_DIR),
+            "msg": "已回退到最近一次生成底图",
+        })
+    except Exception as e:
+        return jsonify({"ok": False, "msg": str(e)}), 500
+
+
+@app.route("/assets/home-favorites/list", methods=["GET"])
+def assets_home_favorites_list():
+    guard = _require_asset_editor_auth()
+    if guard:
+        return guard
+    try:
+        data = _load_home_favorites_index()
+        items = data.get("items") or []
+        out = []
+        for it in items:
+            rel = (it.get("path") or "").strip()
+            if not rel:
+                continue
+            abs_path = os.path.join(ROOT_DIR, rel)
+            if not os.path.exists(abs_path):
+                continue
+            fn = os.path.basename(rel)
+            out.append({
+                "id": it.get("id"),
+                "path": rel,
+                "url": f"/assets/home-favorites/file/{fn}",
+                "thumb_url": f"/assets/home-favorites/file/{fn}",
+                "created_at": it.get("created_at") or "",
+            })
+        out.sort(key=lambda x: x.get("created_at") or "", reverse=True)
+        return jsonify({"ok": True, "items": out})
+    except Exception as e:
+        return jsonify({"ok": False, "msg": str(e)}), 500
+
+
+@app.route("/assets/home-favorites/file/<path:filename>", methods=["GET"])
+def assets_home_favorites_file(filename):
+    guard = _require_asset_editor_auth()
+    if guard:
+        return guard
+    return send_from_directory(HOME_FAVORITES_DIR, filename)
+
+
+@app.route("/assets/home-favorites/save-current", methods=["POST"])
+def assets_home_favorites_save_current():
+    guard = _require_asset_editor_auth()
+    if guard:
+        return guard
+    try:
+        src = FRONTEND_PATH / "office_bg_small.webp"
+        if not src.exists():
+            return jsonify({"ok": False, "msg": "office_bg_small.webp 不存在"}), 404
+
+        _ensure_home_favorites_index()
+        ts = datetime.now().strftime("%Y%m%d-%H%M%S")
+        item_id = f"home-{ts}"
+        fn = f"{item_id}.webp"
+        dst = os.path.join(HOME_FAVORITES_DIR, fn)
+        shutil.copy2(str(src), dst)
+
+        idx = _load_home_favorites_index()
+        items = idx.get("items") or []
+        items.insert(0, {
+            "id": item_id,
+            "path": os.path.relpath(dst, ROOT_DIR),
+            "created_at": datetime.now().isoformat(timespec="seconds"),
+        })
+
+        # 控制收藏数量上限，清理最旧项
+        if len(items) > HOME_FAVORITES_MAX:
+            extra = items[HOME_FAVORITES_MAX:]
+            items = items[:HOME_FAVORITES_MAX]
+            for it in extra:
+                try:
+                    p = os.path.join(ROOT_DIR, it.get("path") or "")
+                    if os.path.exists(p):
+                        os.remove(p)
+                except Exception:
+                    pass
+
+        idx["items"] = items
+        _save_home_favorites_index(idx)
+        return jsonify({"ok": True, "id": item_id, "path": os.path.relpath(dst, ROOT_DIR), "msg": "已收藏当前地图"})
+    except Exception as e:
+        return jsonify({"ok": False, "msg": str(e)}), 500
+
+
+@app.route("/assets/home-favorites/apply", methods=["POST"])
+def assets_home_favorites_apply():
+    guard = _require_asset_editor_auth()
+    if guard:
+        return guard
+    try:
+        data = request.get_json(silent=True) or {}
+        item_id = (data.get("id") or "").strip()
+        if not item_id:
+            return jsonify({"ok": False, "msg": "缺少 id"}), 400
+
+        idx = _load_home_favorites_index()
+        items = idx.get("items") or []
+        hit = next((x for x in items if (x.get("id") or "") == item_id), None)
+        if not hit:
+            return jsonify({"ok": False, "msg": "收藏项不存在"}), 404
+
+        src = os.path.join(ROOT_DIR, hit.get("path") or "")
+        if not os.path.exists(src):
+            return jsonify({"ok": False, "msg": "收藏文件不存在"}), 404
+
+        target = FRONTEND_PATH / "office_bg_small.webp"
+        if not target.exists():
+            return jsonify({"ok": False, "msg": "office_bg_small.webp 不存在"}), 404
+
+        bak = target.with_suffix(target.suffix + ".bak")
+        shutil.copy2(str(target), str(bak))
+        shutil.copy2(src, str(target))
+
+        st = target.stat()
+        return jsonify({"ok": True, "path": "office_bg_small.webp", "size": st.st_size, "from": hit.get("path"), "msg": "已应用收藏地图"})
+    except Exception as e:
+        return jsonify({"ok": False, "msg": str(e)}), 500
+
+
 @app.route("/assets/auth", methods=["POST"])
 def assets_auth():
     try:
@@ -1337,7 +1522,11 @@ def assets_auth():
 
 @app.route("/assets/auth/status", methods=["GET"])
 def assets_auth_status():
-    return jsonify({"ok": True, "authed": _is_asset_editor_authed()})
+    return jsonify({
+        "ok": True,
+        "authed": _is_asset_editor_authed(),
+        "drawer_default_pass": ASSET_DRAWER_PASS_DEFAULT == "1234",
+    })
 
 
 @app.route("/assets/positions", methods=["GET"])
@@ -1433,7 +1622,7 @@ def gemini_config_get():
             "ok": True,
             "has_api_key": bool(key),
             "api_key_masked": masked,
-            "gemini_model": cfg.get("gemini_model") or "gemini-3.1-flash-image-preview",
+            "gemini_model": cfg.get("gemini_model") or "nanobanana-pro",
         })
     except Exception as e:
         return jsonify({"ok": False, "msg": str(e)}), 500
@@ -1447,7 +1636,7 @@ def gemini_config_set():
     try:
         data = request.get_json(silent=True) or {}
         api_key = (data.get("api_key") or "").strip()
-        model = (data.get("model") or "").strip() or "gemini-3.1-flash-image-preview"
+        model = (data.get("model") or "").strip() or "nanobanana-pro"
         payload = {"gemini_model": model}
         if api_key:
             payload["gemini_api_key"] = api_key
@@ -1457,6 +1646,72 @@ def gemini_config_set():
         return jsonify({"ok": False, "msg": str(e)}), 500
 
 
+@app.route("/assets/restore-default", methods=["POST"])
+def assets_restore_default():
+    guard = _require_asset_editor_auth()
+    if guard:
+        return guard
+    try:
+        data = request.get_json(silent=True) or {}
+        rel_path = (data.get("path") or "").strip().lstrip("/")
+        if not rel_path:
+            return jsonify({"ok": False, "msg": "缺少 path"}), 400
+
+        target = (FRONTEND_PATH / rel_path).resolve()
+        try:
+            target.relative_to(FRONTEND_PATH.resolve())
+        except Exception:
+            return jsonify({"ok": False, "msg": "非法 path"}), 400
+
+        if not target.exists():
+            return jsonify({"ok": False, "msg": "目标文件不存在"}), 404
+
+        root, ext = os.path.splitext(str(target))
+        default_path = root + ext + ".default"
+        if not os.path.exists(default_path):
+            return jsonify({"ok": False, "msg": "未找到默认资产快照"}), 404
+
+        # 回滚前保留上一版
+        bak = str(target) + ".bak"
+        if os.path.exists(str(target)):
+            shutil.copy2(str(target), bak)
+
+        shutil.copy2(default_path, str(target))
+        st = os.stat(str(target))
+        return jsonify({"ok": True, "path": rel_path, "size": st.st_size, "msg": "已重置为默认资产"})
+    except Exception as e:
+        return jsonify({"ok": False, "msg": str(e)}), 500
+
+
+@app.route("/assets/restore-prev", methods=["POST"])
+def assets_restore_prev():
+    guard = _require_asset_editor_auth()
+    if guard:
+        return guard
+    try:
+        data = request.get_json(silent=True) or {}
+        rel_path = (data.get("path") or "").strip().lstrip("/")
+        if not rel_path:
+            return jsonify({"ok": False, "msg": "缺少 path"}), 400
+
+        target = (FRONTEND_PATH / rel_path).resolve()
+        try:
+            target.relative_to(FRONTEND_PATH.resolve())
+        except Exception:
+            return jsonify({"ok": False, "msg": "非法 path"}), 400
+
+        bak = str(target) + ".bak"
+        if not os.path.exists(bak):
+            return jsonify({"ok": False, "msg": "未找到上一版备份"}), 404
+
+        shutil.copy2(str(target), bak + ".tmp") if os.path.exists(str(target)) else None
+        shutil.copy2(bak, str(target))
+        st = os.stat(str(target))
+        return jsonify({"ok": True, "path": rel_path, "size": st.st_size, "msg": "已回退到上一版"})
+    except Exception as e:
+        return jsonify({"ok": False, "msg": str(e)}), 500
+
+
 @app.route("/assets/upload", methods=["POST"])
 def assets_upload():
     guard = _require_asset_editor_auth()
@@ -1483,6 +1738,15 @@ def assets_upload():
             return jsonify({"ok": False, "msg": "目标文件不存在，请先从 /assets/list 选择 path"}), 404
 
         target.parent.mkdir(parents=True, exist_ok=True)
+
+        # 首次上传前固化默认资产快照，供“重置为默认资产”使用
+        default_snap = Path(str(target) + ".default")
+        if not default_snap.exists():
+            try:
+                shutil.copy2(target, default_snap)
+            except Exception:
+                pass
+
         if backup:
             bak = target.with_suffix(target.suffix + ".bak")
             shutil.copy2(target, bak)
diff --git a/backend/requirements.txt b/backend/requirements.txt
index 2e7aeea..dda7e89 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -1 +1,2 @@
 flask==3.0.2
+pillow==10.4.0
diff --git a/frontend/index.html b/frontend/index.html
index dd3099e..5818511 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -283,6 +283,19 @@
             cursor: pointer;
         }
         .asset-item.active { border-color: #22c55e; box-shadow: 0 0 0 1px #22c55e inset; }
+        .asset-vis-btn {
+            min-width: 34px;
+            height: 28px;
+            padding: 2px 4px;
+            border: 1px solid #4b5563;
+            background: #111827;
+            color: #d1d5db;
+            border-radius: 6px;
+            font-size: 14px;
+            cursor: pointer;
+            font-family:'ArkPixel', monospace;
+        }
+        .asset-vis-btn:hover { border-color:#22c55e; color:#ecfccb; }
         .asset-thumb { width:56px; height:56px; object-fit: contain; background:#0b1220; border:1px solid #374151; border-radius:6px; }
         .asset-meta { line-height: 1.45; }
         .asset-path { color:#d1fae5; word-break: break-all; }
@@ -295,9 +308,20 @@
         .asset-preview-box { border:1px solid #374151; border-radius:8px; padding:6px; background:#0b1220; margin-bottom:8px; }
         .asset-preview-title { color:#9ca3af; font-size:11px; margin-bottom:4px; }
         .asset-preview-img { width:100%; height:92px; object-fit:contain; background:#111827; border:1px solid #1f2937; border-radius:6px; }
+        .home-fav-list { display:flex; gap:8px; overflow-x:auto; padding-bottom:4px; }
+        .home-fav-item { min-width:126px; max-width:126px; border:1px solid #334155; border-radius:8px; background:#111827; padding:6px; }
+        .home-fav-item img { width:100%; height:70px; object-fit:cover; border:1px solid #1f2937; border-radius:6px; image-rendering:pixelated; }
+        .home-fav-meta { color:#9ca3af; font-size:10px; margin-top:4px; line-height:1.3; min-height:24px; }
+        .home-fav-item button { width:100%; margin-top:4px; border:1px solid #4b5563; background:#1f2937; color:#fff; border-radius:6px; padding:4px 6px; font-family:'ArkPixel', monospace; cursor:pointer; }
+        .home-fav-item button:hover { border-color:#22c55e; }
+        #gemini-api-doc-link { color:#86efac; text-decoration: underline; text-underline-offset: 2px; }
+        #gemini-api-doc-link:hover { color:#bbf7d0; }
 
 
         #asset-move-panel { border:1px solid #334155; background:#0b1220; border-radius:10px; padding:10px; margin-bottom:10px; }
+        #asset-home-actions-panel { border:1px solid #334155; background:#0b1220; border-radius:10px; padding:10px; }
+        #asset-home-actions-panel .asset-toolbar { display:grid; grid-template-columns: 1fr 1fr; gap:8px; }
+        #asset-home-actions-panel .asset-toolbar > button { width:100%; margin:0; }
         #asset-move-row { justify-content: center; gap:12px; margin-bottom:0; }
         #asset-move-row .btn-move,
         #asset-move-row .btn-home,
@@ -1032,7 +1056,7 @@
     <aside id="asset-drawer">
         <div id="asset-drawer-header">
             <span>装修房间 · 资产侧边栏</span>
-            <button onclick="toggleAssetDrawer(false)">关闭</button>
+            <button id="btn-close-drawer" onclick="toggleAssetDrawer(false)">关闭</button>
         </div>
         <div id="asset-drawer-body">
             <div id="asset-auth-gate" class="asset-preview-box">
@@ -1067,10 +1091,11 @@
                             <summary id="gemini-panel-summary" style="cursor:pointer; color:#cbd5e1;">🔐 API 设置（可折叠）</summary>
                             <div id="asset-gemini-config" style="display:block; margin-top:6px;">
                                 <div id="gemini-config-hint" class="asset-sub" style="margin-bottom:4px;">可选：填写你的生图 API Key（留空不影响基础功能）</div>
+                                <div class="asset-sub" style="margin-bottom:6px;"><a id="gemini-api-doc-link" href="https://ai.google.dev/gemini-api/docs/api-key?hl=zh-cn" target="_blank" rel="noopener noreferrer">📘 如何申请 Google API Key</a></div>
                                 <div id="gemini-mask-status" class="asset-sub" style="margin-bottom:6px; color:#a7f3d0;"></div>
                                 <div class="asset-toolbar" style="gap:6px; flex-wrap:wrap;">
                                     <input id="gemini-api-key-input" type="password" placeholder="粘贴 GEMINI_API_KEY（不会回显）" style="min-width:220px; flex:1;" autocomplete="new-password" />
-                                    <button onclick="saveGeminiConfigFromUI()">保存 Key</button>
+                                    <button id="btn-save-gemini-key" onclick="saveGeminiConfigFromUI()">保存 Key</button>
                                 </div>
                                 <div id="gemini-config-msg" class="asset-sub" style="margin-top:4px;"></div>
                             </div>
@@ -1080,6 +1105,18 @@
                         </div>
                     </div>
                 </div>
+
+                <div id="asset-home-actions-panel" class="asset-preview-box" style="margin-bottom:10px;">
+                    <div class="asset-toolbar" style="margin-bottom:6px; gap:8px;">
+                        <button id="btn-back-last-bg" class="btn-home" onclick="restoreLastGeneratedBackground()">↩️ 回上一个家</button>
+                        <button id="btn-favorite-home" class="btn-home" onclick="saveCurrentHomeFavorite()">⭐ 收藏这个家</button>
+                    </div>
+                    <div id="asset-home-favorites" class="asset-preview-box" style="margin:0;">
+                        <div id="asset-home-favorites-title" class="asset-preview-title">🏠 收藏的家</div>
+                        <div id="asset-home-favorites-list" class="home-fav-list"></div>
+                    </div>
+                </div>
+
                 <div id="asset-manual-panel">
                     <div class="asset-toolbar">
                         <input id="asset-search" placeholder="搜索资产名（如 desk / sofa / star）" oninput="renderAssetDrawerList()" />
@@ -1091,6 +1128,10 @@
                             <button id="asset-choose-btn" onclick="openInlineAssetUploader()">上传替换素材</button>
                             <button id="asset-commit-refresh-btn" onclick="commitAndRefresh()" disabled style="opacity:.55;">确认并刷新</button>
                         </div>
+                        <div class="asset-toolbar" style="margin-top:0; margin-bottom:6px; gap:8px;">
+                            <button id="asset-reset-default-btn" onclick="resetSelectedAssetToDefault()" disabled style="opacity:.55;">重置为默认资产</button>
+                            <button id="asset-restore-prev-btn" onclick="restoreSelectedAssetPrev()" disabled style="opacity:.55;">用上一版</button>
+                        </div>
                         <div id="asset-upload-result" class="asset-sub"></div>
                     </div>
                 </div>
@@ -1122,7 +1163,12 @@
                 btnIdle: '待命', btnWork: '工作', btnSync: '同步', btnError: '报警', btnDecor: '装修房间',
                 drawerTitle: '装修房间 · 资产侧边栏', drawerClose: '关闭',
                 authTitle: '请输入装修验证码', authPlaceholder: '输入验证码', authVerify: '验证', authDefaultPassHint: '默认密码：1234（可随时让我帮你改，建议改成强密码）',
-                btnMove: '📦 搬新家', btnHome: '🐚 回老家', btnBroker: '🤝 找中介', btnDIY: '🪚 自己装', btnBrokerGo: '听中介的',
+                drawerVisibilityTip: '可见性：点击条目右侧眼睛按钮切换该资产显示',
+                hideDrawer: '👁 隐藏侧边栏', showDrawer: '👁 显示侧边栏',
+                assetHide: '隐藏', assetShow: '显示',
+                resetToDefault: '重置为默认资产', restorePrevAsset: '用上一版',
+                btnMove: '📦 搬新家', btnHome: '🐚 回老家', btnHomeLast: '↩️ 回上一个家', btnHomeFavorite: '⭐ 收藏这个家', btnBroker: '🤝 找中介', btnDIY: '🪚 自己装', btnBrokerGo: '听中介的',
+                homeFavTitle: '🏠 收藏的家', homeFavEmpty: '还没有收藏，先点“⭐ 收藏这个家”', homeFavApply: '替换到当前地图', homeFavSaved: '✅ 已收藏当前地图', homeFavApplied: '✅ 已替换为收藏地图',
                 brokerHint: '你会给龙虾推荐什么样的房子',
                 brokerPromptPh: '例如：故宫主题、莫奈风格、地牢主题、兵马俑主题……',
                 brokerNeedPrompt: '请先输入中介方案描述',
@@ -1130,7 +1176,7 @@
                 brokerDone: '✅ 已按中介方案生成并替换底图，正在刷新房间...',
                 moveSuccess: '✅ 搬家成功！',
                 brokerMissingKey: '❌ 生图失败：缺少 GEMINI API Key，请在下方填写并保存后重试',
-                geminiPanelTitle: '🔐 API 设置（可折叠）', geminiHint: '可选：填写你的生图 API Key（留空不影响基础功能）', geminiMaskNoKey: '当前状态：未配置 Key', geminiMaskHasKey: '当前已配置：',
+                geminiPanelTitle: '🔐 API 设置（可折叠）', geminiHint: '可选：填写你的生图 API Key（留空不影响基础功能）', geminiApiDoc: '📘 如何申请 Google API Key', geminiInputPh: '粘贴 GEMINI_API_KEY（不会回显）', geminiSaveKey: '保存 Key', geminiMaskNoKey: '当前状态：未配置 Key', geminiMaskHasKey: '当前已配置：',
                 speedModeLabel: '生成模式', speedFast: '🍌2', speedQuality: '🍌Pro',
                 searchPlaceholder: '搜索资产名（如 desk / sofa / star）', loaded: '已加载', allAssets: '全部资产',
                 chooseImage: '上传替换素材', confirmUpload: '确认并刷新', uploadPending: '待上传', uploadTarget: '目标',
@@ -1145,7 +1191,12 @@
                 btnIdle: 'Idle', btnWork: 'Work', btnSync: 'Sync', btnError: 'Alert', btnDecor: 'Decorate Room',
                 drawerTitle: 'Decorate Room · Asset Sidebar', drawerClose: 'Close',
                 authTitle: 'Enter Decor Passcode', authPlaceholder: 'Enter passcode', authVerify: 'Verify', authDefaultPassHint: 'Default passcode: 1234 (ask me anytime to change it; stronger passcode recommended)',
-                btnMove: '📦 New Home', btnHome: '🐚 Go Home', btnBroker: '🤝 Broker', btnDIY: '🪚 DIY', btnBrokerGo: 'Follow Broker',
+                drawerVisibilityTip: 'Visibility: use the eye button on each row to hide/show that asset',
+                hideDrawer: '👁 Hide Drawer', showDrawer: '👁 Show Drawer',
+                assetHide: 'Hide', assetShow: 'Show',
+                resetToDefault: 'Reset to Default', restorePrevAsset: 'Use Previous',
+                btnMove: '📦 New Home', btnHome: '🐚 Go Home', btnHomeLast: '↩️ Last One', btnHomeFavorite: '⭐ Save This Home', btnBroker: '🤝 Broker', btnDIY: '🪚 DIY', btnBrokerGo: 'Follow Broker',
+                homeFavTitle: '🏠 Saved Homes', homeFavEmpty: 'No saved homes yet. Tap “⭐ Save This Home” first.', homeFavApply: 'Apply to Current Map', homeFavSaved: '✅ Current map saved', homeFavApplied: '✅ Applied saved home',
                 brokerHint: 'What kind of house would you recommend for Lobster?',
                 brokerPromptPh: 'e.g. Forbidden City theme, Monet style, dungeon theme, Terracotta Warriors theme...',
                 brokerNeedPrompt: 'Please enter broker style prompt first',
@@ -1153,7 +1204,7 @@
                 brokerDone: '✅ Broker plan applied and background replaced, refreshing room...',
                 moveSuccess: '✅ Move successful!',
                 brokerMissingKey: '❌ Generation failed: missing GEMINI API key. Fill it below and retry.',
-                geminiPanelTitle: '🔐 API Settings (collapsible)', geminiHint: 'Optional: set your image API key (base features work without it)', geminiMaskNoKey: 'Current: no key configured', geminiMaskHasKey: 'Configured key:',
+                geminiPanelTitle: '🔐 API Settings (collapsible)', geminiHint: 'Optional: set your image API key (base features work without it)', geminiApiDoc: '📘 How to get a Google API Key', geminiInputPh: 'Paste GEMINI_API_KEY (input hidden)', geminiSaveKey: 'Save Key', geminiMaskNoKey: 'Current: no key configured', geminiMaskHasKey: 'Configured key:',
                 speedModeLabel: 'Render Mode', speedFast: '🍌2', speedQuality: '🍌Pro',
                 searchPlaceholder: 'Search assets (desk / sofa / star)', loaded: 'Loaded', allAssets: 'All Assets',
                 chooseImage: 'Upload Replacement Asset', confirmUpload: 'Confirm & Refresh', uploadPending: 'Pending Upload', uploadTarget: 'Target',
@@ -1168,7 +1219,12 @@
                 btnIdle: '待機', btnWork: '作業', btnSync: '同期', btnError: '警報', btnDecor: '部屋を編集',
                 drawerTitle: '部屋編集・アセットサイドバー', drawerClose: '閉じる',
                 authTitle: '編集パスコードを入力', authPlaceholder: 'パスコード入力', authVerify: '認証', authDefaultPassHint: '初期パスコード：1234（いつでも変更を相談可。強固なパス推奨）',
-                btnMove: '📦 引っ越し', btnHome: '🐚 実家に戻る', btnBroker: '🤝 仲介', btnDIY: '🪚 自分で装飾', btnBrokerGo: '仲介に任せる',
+                drawerVisibilityTip: '表示切替：各行右側の目ボタンで資産を表示/非表示',
+                hideDrawer: '👁 サイドバーを隠す', showDrawer: '👁 サイドバーを表示',
+                assetHide: '非表示', assetShow: '表示',
+                resetToDefault: 'デフォルトへ戻す', restorePrevAsset: '前の版へ戻す',
+                btnMove: '📦 引っ越し', btnHome: '🐚 実家に戻る', btnHomeLast: '↩️ ひとつ前へ', btnHomeFavorite: '⭐ この家を保存', btnBroker: '🤝 仲介', btnDIY: '🪚 自分で装飾', btnBrokerGo: '仲介に任せる',
+                homeFavTitle: '🏠 保存した家', homeFavEmpty: 'まだ保存がありません。先に「⭐ この家を保存」を押してください。', homeFavApply: '現在のマップに適用', homeFavSaved: '✅ 現在のマップを保存しました', homeFavApplied: '✅ 保存した家を適用しました',
                 brokerHint: 'ロブスターにはどんな家をおすすめしますか',
                 brokerPromptPh: '例：故宮テーマ、モネ風、ダンジョン風、兵馬俑テーマ…',
                 brokerNeedPrompt: '先に仲介プランの説明を入力してください',
@@ -1176,7 +1232,7 @@
                 brokerDone: '✅ 仲介プランを適用して背景を更新しました。部屋を更新中...',
                 moveSuccess: '✅ 引っ越し成功！',
                 brokerMissingKey: '❌ 生成失敗：GEMINI APIキーが未設定です。下で入力して保存してください。',
-                geminiPanelTitle: '🔐 API設定（折りたたみ）', geminiHint: '任意：画像生成APIキーを設定（未設定でも基本機能は利用可）', geminiMaskNoKey: '現在：キー未設定', geminiMaskHasKey: '設定済みキー：',
+                geminiPanelTitle: '🔐 API設定（折りたたみ）', geminiHint: '任意：画像生成APIキーを設定（未設定でも基本機能は利用可）', geminiApiDoc: '📘 Google API Keyの取得方法', geminiInputPh: 'GEMINI_API_KEY を貼り付け（入力は非表示）', geminiSaveKey: 'Keyを保存', geminiMaskNoKey: '現在：キー未設定', geminiMaskHasKey: '設定済みキー：',
                 speedModeLabel: '生成モード', speedFast: '🍌2', speedQuality: '🍌Pro',
                 searchPlaceholder: 'アセット検索（desk / sofa / star）', loaded: '読み込み済み', allAssets: '全アセット',
                 chooseImage: '差し替え素材をアップロード', confirmUpload: '確定して更新', uploadPending: 'アップロード待ち', uploadTarget: '対象',
@@ -1230,7 +1286,7 @@
 
             const drawerTitle = document.querySelector('#asset-drawer-header span');
             if (drawerTitle) drawerTitle.textContent = t('drawerTitle');
-            const drawerClose = document.querySelector('#asset-drawer-header button');
+            const drawerClose = document.getElementById('btn-close-drawer');
             if (drawerClose) drawerClose.textContent = t('drawerClose');
 
             const authTitle = document.querySelector('#asset-auth-gate .asset-preview-title');
@@ -1243,6 +1299,9 @@
             setText('btn-back-home', 'btnHome');
             const brokerBtn = document.querySelector('#asset-broker-row .btn-broker'); if (brokerBtn) brokerBtn.textContent = t('btnBroker');
             const diyBtn = document.querySelector('#asset-broker-row .btn-diy'); if (diyBtn) diyBtn.textContent = t('btnDIY');
+            const backLastBtn = document.getElementById('btn-back-last-bg'); if (backLastBtn) backLastBtn.textContent = t('btnHomeLast');
+            const favHomeBtn = document.getElementById('btn-favorite-home'); if (favHomeBtn) favHomeBtn.textContent = t('btnHomeFavorite');
+            const favTitle = document.getElementById('asset-home-favorites-title'); if (favTitle) favTitle.textContent = t('homeFavTitle');
             const brokerHint = document.querySelector('#asset-broker-panel .asset-sub'); if (brokerHint) brokerHint.textContent = t('brokerHint');
             const brokerPrompt = document.getElementById('asset-broker-prompt'); if (brokerPrompt) brokerPrompt.placeholder = t('brokerPromptPh');
             const brokerGoBtn = document.querySelector('#asset-broker-actions button'); if (brokerGoBtn) brokerGoBtn.textContent = t('btnBrokerGo');
@@ -1251,6 +1310,9 @@
             const speedQualityBtn = document.getElementById('speed-quality-btn'); if (speedQualityBtn) speedQualityBtn.textContent = t('speedQuality');
             const geminiPanelSummary = document.getElementById('gemini-panel-summary'); if (geminiPanelSummary) geminiPanelSummary.textContent = t('geminiPanelTitle');
             const geminiHint = document.getElementById('gemini-config-hint'); if (geminiHint) geminiHint.textContent = t('geminiHint');
+            const geminiDocLink = document.getElementById('gemini-api-doc-link'); if (geminiDocLink) geminiDocLink.textContent = t('geminiApiDoc');
+            const geminiInput = document.getElementById('gemini-api-key-input'); if (geminiInput) geminiInput.placeholder = t('geminiInputPh');
+            const geminiSaveBtn = document.getElementById('btn-save-gemini-key'); if (geminiSaveBtn) geminiSaveBtn.textContent = t('geminiSaveKey');
 
             setPh('asset-search', 'searchPlaceholder');
 
@@ -1457,7 +1519,10 @@
         let assetListData = [];
         let sceneAssetItems = [];
         let selectedAssetInfo = null;
+        let hiddenAssetPaths = new Set();
         let assetThumbTimers = [];
+        let homeFavoritesCache = [];
+        let homeFavoritesLoadedAt = 0;
 
         // 坐标以服务端为准；清理历史本地缓存，避免把素材挪飞
         let assetPositionOverrides = {};
@@ -1878,6 +1943,9 @@
         }
 
         function mapAssetPathToSprite(path) {
+            // 背景做特殊映射：即使纹理 key 已变成 office_bg_live_xxx，也能稳定定位到背景对象
+            if ((path || '').includes('office_bg_small.webp') && officeBgSprite) return officeBgSprite;
+
             const item = sceneAssetItems.find(x => x.path === path && x.ref && x.ref.getBounds);
             if (item) return item.ref;
             const cands = pathToTextureCandidates(path);
@@ -2026,13 +2094,16 @@
 
         function updateAssetConfirmButtonState() {
             const btn = document.getElementById('asset-commit-refresh-btn');
+            const btnReset = document.getElementById('asset-reset-default-btn');
+            const btnPrev = document.getElementById('asset-restore-prev-btn');
             const panel = document.getElementById('asset-upload-panel');
             const can = !!(selectedAssetInfo && selectedAssetInfo.path);
             if (panel) panel.classList.toggle('active', can);
-            if (btn) {
-                btn.disabled = !can;
-                btn.style.opacity = can ? '1' : '.55';
-            }
+            [btn, btnReset, btnPrev].forEach((b) => {
+                if (!b) return;
+                b.disabled = !can;
+                b.style.opacity = can ? '1' : '.55';
+            });
         }
 
         function selectAssetInDrawer(path) {
@@ -2160,6 +2231,37 @@
             img.src = `/static/${item.path}?t=${Date.now()}`;
         }
 
+        function isAssetHidden(path) {
+            return hiddenAssetPaths.has(path || '');
+        }
+
+        function setAssetVisible(path, visible) {
+            const p = (path || '').trim();
+            if (!p) return;
+            if (visible) hiddenAssetPaths.delete(p);
+            else hiddenAssetPaths.add(p);
+
+            const sp = mapAssetPathToSprite(p);
+            if (sp && sp.setVisible) {
+                sp.setVisible(!!visible);
+            }
+        }
+
+        function toggleAssetVisibility(path, ev) {
+            if (ev && ev.stopPropagation) ev.stopPropagation();
+            const p = (path || '').trim();
+            if (!p) return;
+            const nextVisible = isAssetHidden(p);
+            setAssetVisible(p, nextVisible);
+            renderAssetDrawerList();
+            const out = document.getElementById('asset-upload-result');
+            if (out) out.textContent = nextVisible ? `✅ 已显示：${p}` : `🙈 已隐藏：${p}`;
+            if (selectedAssetInfo && selectedAssetInfo.path === p) {
+                if (!nextVisible) clearAssetSelectionUI();
+                else applyScenePreview(p);
+            }
+        }
+
         function renderAssetDrawerList() {
             const q = (document.getElementById('asset-search')?.value || '').trim().toLowerCase();
             const list = document.getElementById('asset-list');
@@ -2178,7 +2280,11 @@
                 const p = (path || '').toLowerCase();
                 const idx = statePriority.findIndex(x => p.endsWith(x));
                 if (idx >= 0) return idx; // 0~3: 四个主状态最前
-                if (p.includes('guest_anim_')) return 999; // guest 动画放最后
+
+                // 按钮素材最不重要：统一沉到列表末尾
+                if (p.includes('/btn-') || p.includes('btn-') || p.includes('button')) return 1000;
+
+                if (p.includes('guest_anim_')) return 999; // guest 动画靠后
                 return 100;
             };
             const rows = baseRows
@@ -2201,12 +2307,15 @@
                 const reso = (it.width && it.height) ? `${it.width}×${it.height}` : '-';
                 const displayName = getAssetDisplayName(it.path || '');
                 const thumbId = `asset-thumb-canvas-${(it.path || '').replace(/[^a-zA-Z0-9]/g, '_')}`;
+                const hidden = isAssetHidden(it.path);
+                const visEmoji = hidden ? '🙈' : '👀';
                 return `<div class="asset-item ${isActive ? 'active' : ''}" data-path="${it.path}" onclick="selectAssetInDrawer('${(it.path || '').replace(/'/g, "\\'")}')">
                     <canvas id="${thumbId}" class="asset-thumb" width="56" height="56"></canvas>
                     <div class="asset-meta">
                         <div class="asset-path">${it.path}</div>
-                        <div class="asset-sub">${displayName} ｜ ${reso}</div>
+                        <div class="asset-sub">${displayName} ｜ ${reso}${hidden ? ' ｜ 已隐藏' : ''}</div>
                     </div>
+                    <button class="asset-vis-btn" onclick="toggleAssetVisibility('${(it.path || '').replace(/'/g, "\\'")}', event)">${visEmoji}</button>
                 </div>`;
             }).join('');
 
@@ -2601,7 +2710,7 @@ function toggleBrokerPanel() {
                 if (data && data.ok) {
                     window.geminiConfig = {
                         hasKey: !!data.has_api_key,
-                        model: data.gemini_model || 'gemini-3.1-flash-image-preview'
+                        model: data.gemini_model || 'nanobanana-pro'
                     };
                     const box = document.getElementById('asset-gemini-config');
                     if (box) box.style.display = 'block';
@@ -2627,7 +2736,7 @@ function toggleBrokerPanel() {
                 const res = await fetch('/config/gemini', {
                     method: 'POST',
                     headers: { 'Content-Type': 'application/json' },
-                    body: JSON.stringify({ api_key: key, model: 'gemini-3.1-flash-image-preview' })
+                    body: JSON.stringify({ api_key: key, model: 'nanobanana-pro' })
                 });
                 const data = await res.json();
                 if (!data.ok) {
@@ -2754,8 +2863,15 @@ function toggleBrokerPanel() {
         async function restoreHomeBackground() {
             const homeBtn = document.getElementById('btn-back-home');
             flashButtonActive(homeBtn);
-            setWorkingStatus('正在回老家');
             const out = document.getElementById('asset-move-result') || document.getElementById('asset-upload-result');
+
+            const confirmMsg = '⚠️ 回老家会覆盖当前自定义房间背景（可从 bg-history 恢复历史图）。\n确定继续吗？';
+            if (!window.confirm(confirmMsg)) {
+                out.textContent = '已取消回老家';
+                return;
+            }
+
+            setWorkingStatus('正在回老家');
             // 点击即刻显示遮罩，先于任何网络调用
             showRoomLoadingOverlay();
             out.textContent = '🏡 正在回老家（恢复初始底图）...';
@@ -2780,12 +2896,196 @@ function toggleBrokerPanel() {
             }
         }
 
+        async function restoreLastGeneratedBackground() {
+            const btn = document.getElementById('btn-back-last-bg');
+            flashButtonActive(btn);
+            const out = document.getElementById('asset-move-result') || document.getElementById('asset-upload-result');
+
+            const confirmMsg = '⚠️ 将回退到最近一次生成的房间背景，确定继续吗？';
+            if (!window.confirm(confirmMsg)) {
+                out.textContent = '已取消回退';
+                return;
+            }
+
+            setWorkingStatus('正在回退到上一次背景');
+            showRoomLoadingOverlay();
+            out.textContent = '↩️ 正在回退到最近一次生成底图...';
+            try {
+                const res = await fetch('/assets/restore-last-generated-background', { method: 'POST' });
+                const data = await res.json();
+                if (!data.ok) {
+                    out.textContent = `❌ 回退失败：${data.msg || res.status}`;
+                    return;
+                }
+                const ok = await refreshOfficeBackgroundOnly();
+                if (ok) {
+                    out.textContent = '✅ 已回退到上一次背景';
+                } else {
+                    out.textContent = '✅ 已回退到上一次背景（局部刷新失败，可手动刷新页面）';
+                }
+                try { setState('idle', '已回退到上一次背景'); } catch (e) {}
+            } catch (e) {
+                out.textContent = `❌ 回退失败：${e}`;
+            } finally {
+                hideRoomLoadingOverlay();
+            }
+        }
+
+        async function fetchJsonSafe(url, options = {}) {
+            const res = await fetch(url, options);
+            const ct = (res.headers.get('content-type') || '').toLowerCase();
+            if (!ct.includes('application/json')) {
+                const txt = await res.text();
+                const brief = (txt || '').replace(/\s+/g, ' ').slice(0, 120);
+                throw new Error(`接口未返回 JSON（${res.status}）: ${brief || 'empty response'}`);
+            }
+            return await res.json();
+        }
+
+        async function renderHomeFavorites(force = false) {
+            const box = document.getElementById('asset-home-favorites-list');
+            if (!box) return;
+            const now = Date.now();
+            if (!force && homeFavoritesCache.length > 0 && (now - homeFavoritesLoadedAt) < 30000) {
+                // 使用缓存，避免频繁请求
+            } else {
+                try {
+                    const data = await fetchJsonSafe('/assets/home-favorites/list', { cache: 'no-store' });
+                    if (data && data.ok && Array.isArray(data.items)) {
+                        homeFavoritesCache = data.items;
+                        homeFavoritesLoadedAt = now;
+                    }
+                } catch (e) {
+                    const out = document.getElementById('asset-move-result') || document.getElementById('asset-upload-result');
+                    if (out) out.textContent = `❌ 收藏列表加载失败：${e.message || e}`;
+                }
+            }
+
+            if (!homeFavoritesCache.length) {
+                box.innerHTML = `<div class="asset-sub" style="padding:4px 2px;">${t('homeFavEmpty')}</div>`;
+                return;
+            }
+
+            box.innerHTML = homeFavoritesCache.map((it) => {
+                const id = (it.id || '').replace(/'/g, "\\'");
+                const thumb = it.thumb_url || it.url || '';
+                const time = it.created_at || '';
+                return `<div class="home-fav-item">
+                    <img src="${thumb}" loading="lazy" alt="favorite-home" />
+                    <div class="home-fav-meta">${time}</div>
+                    <button onclick="applyHomeFavorite('${id}')">${t('homeFavApply')}</button>
+                </div>`;
+            }).join('');
+        }
+
+        async function saveCurrentHomeFavorite() {
+            const btn = document.getElementById('btn-favorite-home');
+            flashButtonActive(btn);
+            const out = document.getElementById('asset-move-result') || document.getElementById('asset-upload-result');
+            try {
+                const data = await fetchJsonSafe('/assets/home-favorites/save-current', { method: 'POST' });
+                if (!data.ok) {
+                    out.textContent = `❌ 收藏失败：${data.msg || 'unknown error'}`;
+                    return;
+                }
+                out.textContent = t('homeFavSaved');
+                await renderHomeFavorites(true);
+            } catch (e) {
+                out.textContent = `❌ 收藏失败：${e.message || e}`;
+            }
+        }
+
+        async function applyHomeFavorite(id) {
+            const out = document.getElementById('asset-move-result') || document.getElementById('asset-upload-result');
+            if (!id) return;
+            showRoomLoadingOverlay();
+            setWorkingStatus('正在替换收藏地图');
+            try {
+                const data = await fetchJsonSafe('/assets/home-favorites/apply', {
+                    method: 'POST',
+                    headers: { 'Content-Type': 'application/json' },
+                    body: JSON.stringify({ id })
+                });
+                if (!data.ok) {
+                    out.textContent = `❌ 替换失败：${data.msg || 'unknown error'}`;
+                    return;
+                }
+                const ok = await refreshOfficeBackgroundOnly();
+                out.textContent = ok ? t('homeFavApplied') : `${t('homeFavApplied')}（局部刷新失败，可手动刷新页面）`;
+                try { setState('idle', '已应用收藏地图'); } catch (e) {}
+            } catch (e) {
+                out.textContent = `❌ 替换失败：${e.message || e}`;
+            } finally {
+                hideRoomLoadingOverlay();
+            }
+        }
+
+        async function resetSelectedAssetToDefault() {
+            const out = document.getElementById('asset-upload-result');
+            const path = selectedAssetInfo && selectedAssetInfo.path;
+            if (!path) {
+                if (out) out.textContent = '请先选择一个资产';
+                return;
+            }
+            if (!window.confirm(`⚠️ 确定将 ${path} 重置为默认资产吗？`)) return;
+            try {
+                const res = await fetch('/assets/restore-default', {
+                    method: 'POST',
+                    headers: { 'Content-Type': 'application/json' },
+                    body: JSON.stringify({ path })
+                });
+                const data = await res.json();
+                if (!data.ok) {
+                    if (out) out.textContent = `❌ 重置失败：${data.msg || res.status}`;
+                    return;
+                }
+                await refreshSceneObjectByAssetPath(path);
+                if (out) out.textContent = `✅ 已重置为默认资产：${path}`;
+            } catch (e) {
+                if (out) out.textContent = `❌ 重置失败：${e}`;
+            }
+        }
+
+        async function restoreSelectedAssetPrev() {
+            const out = document.getElementById('asset-upload-result');
+            const path = selectedAssetInfo && selectedAssetInfo.path;
+            if (!path) {
+                if (out) out.textContent = '请先选择一个资产';
+                return;
+            }
+            if (!window.confirm(`⚠️ 确定将 ${path} 回退到上一版吗？`)) return;
+            try {
+                const res = await fetch('/assets/restore-prev', {
+                    method: 'POST',
+                    headers: { 'Content-Type': 'application/json' },
+                    body: JSON.stringify({ path })
+                });
+                const data = await res.json();
+                if (!data.ok) {
+                    if (out) out.textContent = `❌ 回退失败：${data.msg || res.status}`;
+                    return;
+                }
+                await refreshSceneObjectByAssetPath(path);
+                if (out) out.textContent = `✅ 已回退到上一版：${path}`;
+            } catch (e) {
+                if (out) out.textContent = `❌ 回退失败：${e}`;
+            }
+        }
+
         async function toggleAssetDrawer(force) {
             const drawer = document.getElementById('asset-drawer');
             const next = (typeof force === 'boolean') ? force : !assetDrawerOpen;
             assetDrawerOpen = next;
             drawer.classList.toggle('open', next);
             document.body.classList.toggle('drawer-open', next);
+
+            const openBtn = document.getElementById('btn-open-drawer');
+            if (openBtn) {
+                openBtn.classList.toggle('is-active', next);
+                openBtn.textContent = t('btnDecor');
+            }
+            const closeBtn = document.getElementById('btn-close-drawer');
+            if (closeBtn) closeBtn.textContent = t('drawerClose');
             if (next) {
                 assetManualPanelOpen = false;
                 updateAssetAuthUI();
@@ -2793,6 +3093,7 @@ function toggleBrokerPanel() {
                 await ensureGeminiConfigLoaded();
                 if (assetDrawerAuthed) {
                     await refreshAssetDrawerList();
+                    await renderHomeFavorites(false);
                     bindDrawerFileMeta();
                 } else {
                     const msg = document.getElementById('asset-auth-msg');