diff --git a/index.js b/index.js
index 5d3dd58..657558c 100644
--- a/index.js
+++ b/index.js
@@ -31,6 +31,8 @@ import {
   BME_GRAPH_LOCAL_STORAGE_MODE_INDEXEDDB,
   BME_GRAPH_LOCAL_STORAGE_MODE_OPFS_PRIMARY,
   BME_GRAPH_LOCAL_STORAGE_MODE_OPFS_SHADOW,
+  deleteAllOpfsStorage,
+  deleteOpfsChatStorage,
   OpfsGraphStore,
   detectOpfsSupport,
   isGraphLocalStorageModeOpfs,
@@ -15280,6 +15282,7 @@ const _cleanupRuntime = () => ({
   buildBmeDbName,
   buildRestoreSafetyDbName: (chatId) =>
     buildBmeDbName(buildRestoreSafetyChatId(chatId)),
+  buildRestoreSafetyChatId,
   closeBmeDb: async (chatId) => {
     const normalizedChatId = normalizeChatIdCandidate(chatId);
     if (!normalizedChatId || !bmeChatManager) return;
@@ -15299,10 +15302,15 @@ const _cleanupRuntime = () => ({
   clearCachedIndexedDbSnapshot,
   clearAllCachedIndexedDbSnapshots,
   clearCurrentChatCommitMarker,
+  deleteCurrentChatOpfsStorage: async (chatId) =>
+    await deleteOpfsChatStorage(chatId),
+  deleteAllOpfsStorage: async () =>
+    await deleteAllOpfsStorage(),
   deleteRemoteSyncFile: (chatId) => deleteRemoteSyncFile(chatId, {
     fetch: globalThis.fetch?.bind(globalThis),
     getRequestHeaders: typeof getRequestHeaders === "function" ? getRequestHeaders : undefined,
   }),
+  getGraphPersistenceState: () => graphPersistenceState,
   toastr,
 });
 
diff --git a/sync/bme-opfs-store.js b/sync/bme-opfs-store.js
index de50d04..a527122 100644
--- a/sync/bme-opfs-store.js
+++ b/sync/bme-opfs-store.js
@@ -340,6 +340,19 @@ async function maybeGetFileHandle(parentHandle, name) {
   }
 }
 
+async function maybeGetDirectoryHandle(parentHandle, name) {
+  try {
+    return await parentHandle.getDirectoryHandle(String(name || ""), {
+      create: false,
+    });
+  } catch (error) {
+    if (isNotFoundError(error)) {
+      return null;
+    }
+    throw error;
+  }
+}
+
 async function readJsonFile(parentHandle, name, fallbackValue = null) {
   const fileHandle = await maybeGetFileHandle(parentHandle, name);
   if (!fileHandle) {
@@ -599,6 +612,116 @@ export async function detectOpfsSupport(options = {}) {
   }
 }
 
+export async function deleteOpfsChatStorage(chatId, options = {}) {
+  const normalizedChatId = normalizeChatId(chatId);
+  if (!normalizedChatId) {
+    return {
+      deleted: false,
+      reason: "missing-chat-id",
+      chatId: "",
+    };
+  }
+  const rootDirectoryFactory =
+    typeof options.rootDirectoryFactory === "function"
+      ? options.rootDirectoryFactory
+      : getDefaultOpfsRootDirectory;
+  try {
+    const rootDirectory = await rootDirectoryFactory();
+    if (!rootDirectory || typeof rootDirectory.getDirectoryHandle !== "function") {
+      return {
+        deleted: false,
+        reason: "missing-directory-handle",
+        chatId: normalizedChatId,
+      };
+    }
+    const opfsRoot = await maybeGetDirectoryHandle(
+      rootDirectory,
+      OPFS_ROOT_DIRECTORY_NAME,
+    );
+    if (!opfsRoot) {
+      return {
+        deleted: false,
+        reason: "not-found",
+        chatId: normalizedChatId,
+      };
+    }
+    const chatsDirectory = await maybeGetDirectoryHandle(
+      opfsRoot,
+      OPFS_CHATS_DIRECTORY_NAME,
+    );
+    if (!chatsDirectory) {
+      return {
+        deleted: false,
+        reason: "not-found",
+        chatId: normalizedChatId,
+      };
+    }
+    const chatDirectoryName = buildChatDirectoryName(normalizedChatId);
+    const chatDirectory = await maybeGetDirectoryHandle(chatsDirectory, chatDirectoryName);
+    if (!chatDirectory) {
+      return {
+        deleted: false,
+        reason: "not-found",
+        chatId: normalizedChatId,
+      };
+    }
+    await chatsDirectory.removeEntry(chatDirectoryName, {
+      recursive: true,
+    });
+    return {
+      deleted: true,
+      reason: "deleted",
+      chatId: normalizedChatId,
+    };
+  } catch (error) {
+    return {
+      deleted: false,
+      reason: "delete-failed",
+      chatId: normalizedChatId,
+      error,
+    };
+  }
+}
+
+export async function deleteAllOpfsStorage(options = {}) {
+  const rootDirectoryFactory =
+    typeof options.rootDirectoryFactory === "function"
+      ? options.rootDirectoryFactory
+      : getDefaultOpfsRootDirectory;
+  try {
+    const rootDirectory = await rootDirectoryFactory();
+    if (!rootDirectory || typeof rootDirectory.getDirectoryHandle !== "function") {
+      return {
+        deleted: false,
+        reason: "missing-directory-handle",
+      };
+    }
+    const opfsRoot = await maybeGetDirectoryHandle(
+      rootDirectory,
+      OPFS_ROOT_DIRECTORY_NAME,
+    );
+    if (!opfsRoot) {
+      return {
+        deleted: false,
+        reason: "not-found",
+      };
+    }
+    await rootDirectory.removeEntry(OPFS_ROOT_DIRECTORY_NAME, {
+      recursive: true,
+    });
+    return {
+      deleted: true,
+      reason: "deleted",
+    };
+  } catch (error) {
+    return {
+      deleted: false,
+      reason: "delete-failed",
+      error,
+    };
+  }
+}
+
 class LegacyOpfsGraphStore {
   constructor(chatId, options = {}) {
     this.chatId = normalizeChatId(chatId);
diff --git a/tests/opfs-persistence.mjs b/tests/opfs-persistence.mjs
index 3be76b7..10f7095 100644
--- a/tests/opfs-persistence.mjs
+++ b/tests/opfs-persistence.mjs
@@ -8,6 +8,8 @@ import {
 import {
   BME_GRAPH_LOCAL_STORAGE_MODE_OPFS_PRIMARY,
   BME_GRAPH_LOCAL_STORAGE_MODE_OPFS_SHADOW,
+  deleteAllOpfsStorage,
+  deleteOpfsChatStorage,
   OpfsGraphStore,
   detectOpfsSupport,
 } from "../sync/bme-opfs-store.js";
@@ -520,6 +522,59 @@ async function testPruneExpiredTombstonesAndClearAll() {
   await store.close();
 }
 
+async function testDeleteCurrentAndAllOpfsStorage() {
+  const rootDirectory = createMemoryOpfsRoot();
+  const storeA = new OpfsGraphStore("chat-opfs-delete-a", {
+    rootDirectoryFactory: async () => rootDirectory,
+    storeMode: BME_GRAPH_LOCAL_STORAGE_MODE_OPFS_PRIMARY,
+  });
+  const storeB = new OpfsGraphStore("chat-opfs-delete-b", {
+    rootDirectoryFactory: async () => rootDirectory,
+    storeMode: BME_GRAPH_LOCAL_STORAGE_MODE_OPFS_PRIMARY,
+  });
+  await storeA.open();
+  await storeB.open();
+
+  await storeA.importSnapshot(
+    {
+      meta: { revision: 1 },
+      state: { lastProcessedFloor: 1, extractionCount: 1 },
+      nodes: [{ id: "node-a", type: "event", fields: { title: "A" }, archived: false, updatedAt: 1 }],
+      edges: [],
+      tombstones: [],
+    },
+    { mode: "replace", preserveRevision: true },
+  );
+  await storeB.importSnapshot(
+    {
+      meta: { revision: 1 },
+      state: { lastProcessedFloor: 1, extractionCount: 1 },
+      nodes: [{ id: "node-b", type: "event", fields: { title: "B" }, archived: false, updatedAt: 1 }],
+      edges: [],
+      tombstones: [],
+    },
+    { mode: "replace", preserveRevision: true },
+  );
+
+  const deleteCurrentResult = await deleteOpfsChatStorage("chat-opfs-delete-a", {
+    rootDirectoryFactory: async () => rootDirectory,
+  });
+  assert.equal(deleteCurrentResult.deleted, true);
+
+  const chatsDirectory = getNestedDirectory(
+    getNestedDirectory(rootDirectory, "st-bme"),
+    "chats",
+  );
+  assert.equal(chatsDirectory.directories.has(encodeURIComponent("chat-opfs-delete-a")), false);
+  assert.equal(chatsDirectory.directories.has(encodeURIComponent("chat-opfs-delete-b")), true);
+
+  const deleteAllResult = await deleteAllOpfsStorage({
+    rootDirectoryFactory: async () => rootDirectory,
+  });
+  assert.equal(deleteAllResult.deleted, true);
+  assert.equal(rootDirectory.directories.has("st-bme"), false);
+}
+
 async function main() {
   console.log(`${PREFIX} starting`);
 
@@ -527,6 +582,7 @@ async function main() {
   await testImportExportPersistenceAndFileRotation();
   await testImportLegacyGraphMigrationAndSkipPaths();
   await testPruneExpiredTombstonesAndClearAll();
+  await testDeleteCurrentAndAllOpfsStorage();
 
   console.log("opfs-persistence tests passed");
 }
diff --git a/ui/panel.html b/ui/panel.html
index 018a8e7..1f6ac72 100644
--- a/ui/panel.html
+++ b/ui/panel.html
@@ -2921,7 +2921,7 @@
                   <div>
                     <div class="bme-config-card-title">数据存储清理</div>
                     <div class="bme-config-card-subtitle">
-                      删除本地 IndexedDB 缓存或服务端同步文件。
+                      删除本地 OPFS / IndexedDB 图谱存储，或清理服务端同步数据。
                     </div>
                   </div>
                 </div>
@@ -2932,7 +2932,7 @@
                     type="button"
                   >
                     <i class="fa-solid fa-hard-drive"></i>
-                    <span>清空当前聊天 IDB</span>
+                    <span>清空当前聊天本地存储</span>
                   </button>
                   <button
                     class="bme-action-btn danger"
@@ -2940,7 +2940,7 @@
                     type="button"
                   >
                     <i class="fa-solid fa-explosion"></i>
-                    <span>清空全部 BME IDB</span>
+                    <span>清空全部 BME 本地存储</span>
                   </button>
                   <button
                     class="bme-action-btn danger"
@@ -2948,12 +2948,12 @@
                     type="button"
                   >
                     <i class="fa-solid fa-cloud-arrow-down"></i>
-                    <span>清空服务端同步文件</span>
+                    <span>清空服务端同步数据</span>
                   </button>
                 </div>
                 <div class="bme-config-help bme-cleanup-warning-text">
                   <i class="fa-solid fa-triangle-exclamation"></i>
-                  「清空全部 BME IDB」和「清空服务端同步文件」需要输入 DELETE 确认。
+                  「清空全部 BME 本地存储」和「清空服务端同步数据」需要输入 DELETE 确认。
                 </div>
               </div>
             </section>
diff --git a/ui/panel.js b/ui/panel.js
index 34352db..a463ad4 100644
--- a/ui/panel.js
+++ b/ui/panel.js
@@ -5246,9 +5246,9 @@ function _bindActions() {
     clearGraph: "清空图谱",
     clearVectorCache: "清空向量缓存",
     clearBatchJournal: "清空提取历史",
-    deleteCurrentIdb: "清空当前 IDB",
-    deleteAllIdb: "清空全部 IDB",
-    deleteServerSyncFile: "清空服务端同步文件",
+    deleteCurrentIdb: "清空当前本地存储",
+    deleteAllIdb: "清空全部本地存储",
+    deleteServerSyncFile: "清空服务端同步数据",
     backupToCloud: "\u5907\u4efd\u5230\u4e91\u7aef",
     restoreFromCloud: "\u4ece\u4e91\u7aef\u83b7\u53d6\u5907\u4efd",
     manageServerBackups: "\u7ba1\u7406\u670d\u52a1\u5668\u5907\u4efd",
@@ -11356,7 +11356,7 @@ function _formatPersistMismatchReason(reason = "") {
   if (!normalized) return "—";
   switch (normalized) {
     case "persist-mismatch:indexeddb-behind-commit-marker":
-      return "本地 IndexedDB 缓存版本落后于当前聊天已确认版本";
+      return "本地图谱存储版本落后于当前聊天已确认版本";
     default:
       return normalized;
   }
@@ -11366,7 +11366,7 @@ function _formatPersistMismatchHelp(reason = "") {
   const normalized = String(reason || "").trim();
   switch (normalized) {
     case "persist-mismatch:indexeddb-behind-commit-marker":
-      return "当前聊天记录显示图谱已经确认到更高版本，但本地 IndexedDB 里还没有对应数据。常见于刚清空本地缓存，或写入确认还没完成。建议先点“重新探测图谱”；如果仍异常，再点“重试持久化”或执行重建/恢复。";
+      return "当前聊天记录显示图谱已经确认到更高版本，但本地 OPFS / IndexedDB 存储里还没有对应数据。常见于刚清空本地缓存，或写入确认还没完成。建议先点“重新探测图谱”；如果仍异常，再点“重试持久化”或执行重建/恢复。";
     default:
       return `检测到持久化一致性异常：${_formatPersistMismatchReason(normalized)}。建议先重新探测图谱；如果仍异常，再执行重建或恢复。`;
   }
@@ -11750,7 +11750,7 @@ function _refreshCloudStorageModeUi(settings = _getSettings?.() || {}) {
   if (helpText) {
     helpText.textContent =
       mode === "manual"
-        ? "\u624b\u52a8\u50a8\u5b58\u53ea\u4fdd\u7559\u672c\u5730 IndexedDB \u5199\u5165\uff0c\u4e0d\u4f1a\u81ea\u52a8\u4e0a\u4f20\u6216\u8986\u76d6\u4e91\u7aef\u3002\u9700\u8981\u63a5\u529b\u65f6\uff0c\u8bf7\u624b\u52a8\u70b9\u51fb\u4e0b\u65b9\u6309\u94ae\u3002"
+        ? "\u624b\u52a8\u50a8\u5b58\u53ea\u4fdd\u7559\u672c\u5730 OPFS / IndexedDB \u5199\u5165\uff0c\u4e0d\u4f1a\u81ea\u52a8\u4e0a\u4f20\u6216\u8986\u76d6\u4e91\u7aef\u3002\u9700\u8981\u63a5\u529b\u65f6\uff0c\u8bf7\u624b\u52a8\u70b9\u51fb\u4e0b\u65b9\u6309\u94ae\u3002"
         : "\u81ea\u52a8\u50a8\u5b58\u4f1a\u7ee7\u7eed\u6cbf\u7528\u5f53\u524d\u955c\u50cf\u540c\u6b65\u903b\u8f91\u4e0e\u95f4\u9694\uff1b\u624b\u52a8\u50a8\u5b58\u53ea\u4fdd\u7559\u672c\u5730\u5199\u5165\uff0c\u9700\u8981\u4f60\u4e3b\u52a8\u5907\u4efd\u548c\u6062\u590d\u3002";
   }
   _renderCloudStorageModeStatus(settings, _getGraphPersistenceSnapshot());
diff --git a/ui/ui-actions-controller.js b/ui/ui-actions-controller.js
index 7021da4..2995b8c 100644
--- a/ui/ui-actions-controller.js
+++ b/ui/ui-actions-controller.js
@@ -1168,9 +1168,19 @@ export async function onDeleteCurrentIdbController(runtime) {
 
   const dbName = runtime.buildBmeDbName(chatId);
   const restoreSafetyDbName = runtime.buildRestoreSafetyDbName?.(chatId) || "";
+  const restoreSafetyChatId =
+    typeof runtime.buildRestoreSafetyChatId === "function"
+      ? runtime.buildRestoreSafetyChatId(chatId)
+      : `__restore_safety__${chatId}`;
+  const persistenceState = runtime.getGraphPersistenceState?.() || {};
+  const hostProfile = String(persistenceState.hostProfile || "generic-st");
+  const localStoreLabel =
+    hostProfile === "luker"
+      ? "当前聊天的本地缓存（IndexedDB / OPFS，不影响 Luker 侧车主存储）"
+      : "当前聊天的本地图谱存储（IndexedDB / OPFS）";
   if (
     !runtime.confirm(
-      `确定要删除当前聊天的本地缓存数据库？\n\n目标: ${dbName}\n操作不可撤销。`,
+      `确定要删除${localStoreLabel}？\n\n将尝试清理：\n- ${dbName}\n- OPFS 当前聊天目录\n- restore safety 本地副本\n\n操作不可撤销。`,
     )
   ) {
     return { cancelled: true };
@@ -1178,32 +1188,50 @@ export async function onDeleteCurrentIdbController(runtime) {
 
   try {
     await runtime.closeBmeDb?.(chatId);
+    let deletedIndexedDbCount = 0;
     await new Promise((resolve, reject) => {
       const req = indexedDB.deleteDatabase(dbName);
-      req.onsuccess = () => resolve();
+      req.onsuccess = () => {
+        deletedIndexedDbCount += 1;
+        resolve();
+      };
       req.onerror = () => reject(req.error);
       req.onblocked = () => resolve();
     });
     if (restoreSafetyDbName) {
       await new Promise((resolve, reject) => {
         const req = indexedDB.deleteDatabase(restoreSafetyDbName);
-        req.onsuccess = () => resolve();
+        req.onsuccess = () => {
+          deletedIndexedDbCount += 1;
+          resolve();
+        };
         req.onerror = () => reject(req.error);
         req.onblocked = () => resolve();
       });
     }
+    const currentOpfsResult = await runtime.deleteCurrentChatOpfsStorage?.(chatId);
+    const restoreSafetyOpfsResult =
+      restoreSafetyChatId && restoreSafetyChatId !== chatId
+        ? await runtime.deleteCurrentChatOpfsStorage?.(restoreSafetyChatId)
+        : null;
     runtime.clearCachedIndexedDbSnapshot?.(chatId);
+    runtime.clearCachedIndexedDbSnapshot?.(restoreSafetyChatId);
     runtime.clearCurrentChatCommitMarker?.({
-      reason: "manual-delete-current-idb",
+      reason: "manual-delete-current-local-storage",
       immediate: true,
       resetAcceptedRevision: true,
     });
     runtime.syncGraphLoadFromLiveContext?.({
-      source: "manual-delete-current-idb",
+      source: "manual-delete-current-local-storage",
       force: true,
     });
     runtime.refreshPanelLiveState?.();
-    runtime.toastr.success(`已删除数据库 ${dbName}`);
+    const deletedOpfs =
+      currentOpfsResult?.deleted === true ||
+      restoreSafetyOpfsResult?.deleted === true;
+    runtime.toastr.success(
+      `已清空当前聊天本地存储：IndexedDB ${deletedIndexedDbCount > 0 ? "已处理" : "无"}，OPFS ${deletedOpfs ? "已处理" : "无"}`,
+    );
   } catch (error) {
     runtime.toastr.error(`删除失败: ${error?.message || error}`);
   }
@@ -1212,7 +1240,7 @@ export async function onDeleteCurrentIdbController(runtime) {
 
 export async function onDeleteAllIdbController(runtime) {
   const userInput = runtime.prompt(
-    "此操作会删除所有聊天的 BME 本地缓存数据库，不可恢复。\n\n请输入 DELETE 确认：",
+    "此操作会删除所有聊天的 BME 本地图谱存储（IndexedDB / OPFS），不影响 Luker 侧车主存储。\n\n请输入 DELETE 确认：",
   );
   if (userInput !== "DELETE") {
     if (userInput != null) {
@@ -1246,22 +1274,29 @@ export async function onDeleteAllIdbController(runtime) {
         // continue deleting others
       }
     }
+    const opfsResult = await runtime.deleteAllOpfsStorage?.();
 
     runtime.clearAllCachedIndexedDbSnapshots?.();
     const activeChatId = runtime.getCurrentChatId?.();
     if (activeChatId) {
       runtime.clearCurrentChatCommitMarker?.({
-        reason: "manual-delete-all-idb",
+        reason: "manual-delete-all-local-storage",
         immediate: true,
         resetAcceptedRevision: true,
       });
       runtime.syncGraphLoadFromLiveContext?.({
-        source: "manual-delete-all-idb",
+        source: "manual-delete-all-local-storage",
         force: true,
       });
     }
     runtime.refreshPanelLiveState?.();
-    runtime.toastr.success(`已删除 ${deletedCount}/${bmeDbs.length} 个 BME 数据库`);
+    if (bmeDbs.length === 0 && opfsResult?.deleted !== true) {
+      runtime.toastr.info("没有找到 BME 本地图谱存储");
+      return { handledToast: true };
+    }
+    runtime.toastr.success(
+      `已清空 BME 本地图谱存储：IndexedDB ${deletedCount}/${bmeDbs.length}，OPFS ${opfsResult?.deleted ? "已处理" : "无"}`,
+    );
   } catch (error) {
     runtime.toastr.error(`删除失败: ${error?.message || error}`);
   }
@@ -1276,7 +1311,7 @@ export async function onDeleteServerSyncFileController(runtime) {
   }
 
   const userInput = runtime.prompt(
-    "此操作会删除当前聊天在服务端的同步文件，不可恢复。\n\n请输入 DELETE 确认：",
+    "此操作会删除当前聊天在服务端的同步数据。\n\n如果该聊天已经升级到远端 v2，同步 manifest 和 chunk 文件都会一起删除。\n\n请输入 DELETE 确认：",
   );
   if (userInput !== "DELETE") {
     if (userInput != null) {
@@ -1288,11 +1323,11 @@ export async function onDeleteServerSyncFileController(runtime) {
   try {
     const result = await runtime.deleteRemoteSyncFile(chatId);
     if (result?.deleted) {
-      runtime.toastr.success(`已删除服务端同步文件: ${result.filename}`);
+      runtime.toastr.success(`已删除服务端同步数据: ${result.filename}`);
     } else {
       runtime.toastr.info(
         result?.reason === "not-found"
-          ? "服务端没有找到同步文件"
+          ? "服务端没有找到同步数据"
           : `删除未成功: ${result?.reason || "未知原因"}`,
       );
     }