diff --git a/apps/api/src/memo-service.ts b/apps/api/src/memo-service.ts
index 8d86961c..8b81c1a7 100644
--- a/apps/api/src/memo-service.ts
+++ b/apps/api/src/memo-service.ts
@@ -21,6 +21,7 @@ import { auditStatement } from "./audit";
 import type { AppContext, AuditActor, AuthContext, Bindings } from "./api-context";
 import { AppError } from "./app-error";
 import { createId, isoNow, parseJsonArray } from "./entity-utils";
+import { workspaceInboxId } from "./notebook-service";
 import { sha256 } from "./hash-utils";
 import { getRequiredString } from "./mcp-json-rpc";
 import {
@@ -596,7 +597,13 @@ export const restoreMemosRecord = async (
   const needsInbox = rows.results.some((row) => !activeNotebookIds.has(row.notebook_id));
 
   const inbox = needsInbox
-    ? await db.prepare(`SELECT id FROM notebooks WHERE workspace_id = ? AND slug = 'inbox' AND is_deleted = 0 LIMIT 1`).bind(workspaceId).first<{ id: string }>()
+    ? await db.prepare(
+      `SELECT id FROM notebooks
+       WHERE workspace_id = ? AND is_deleted = 0
+         AND (id = ? OR id = 'nb_inbox' OR slug = 'inbox')
+       ORDER BY CASE WHEN id = ? THEN 0 WHEN id = 'nb_inbox' THEN 1 ELSE 2 END
+       LIMIT 1`,
+    ).bind(workspaceId, workspaceInboxId(workspaceId), workspaceInboxId(workspaceId)).first<{ id: string }>()
     : null;
   if (needsInbox && !inbox) {
     throw new AppError("restore_notebook_missing", "Original notebooks were deleted and the default inbox is unavailable.", 409);
diff --git a/apps/api/src/notebook-service.test.mjs b/apps/api/src/notebook-service.test.mjs
new file mode 100644
index 00000000..5dc1316e
--- /dev/null
+++ b/apps/api/src/notebook-service.test.mjs
@@ -0,0 +1,106 @@
+import { describe, expect, test } from "bun:test";
+import { Database } from "bun:sqlite";
+import { globSync, readFileSync } from "node:fs";
+import { createSelfHostedStorageAdapter } from "./self-hosted-storage-adapter.ts";
+import { deleteNotebookRecord, isInboxNotebook, updateNotebookRecord } from "./notebook-service.ts";
+import { workspaceInboxId } from "./workspace-provisioning.ts";
+
+const actor = { actorType: "user", actorId: "usr_1" };
+
+const createFixture = () => {
+  const sqlite = new Database(":memory:");
+  sqlite.exec(`
+    CREATE TABLE notebooks (
+      id TEXT PRIMARY KEY, workspace_id TEXT NOT NULL, parent_id TEXT, name TEXT NOT NULL,
+      slug TEXT, icon TEXT, color TEXT, sort_order INTEGER NOT NULL DEFAULT 0,
+      is_deleted INTEGER NOT NULL DEFAULT 0, created_at TEXT NOT NULL, updated_at TEXT NOT NULL,
+      deleted_at TEXT
+    );
+    CREATE TABLE memos (
+      id TEXT PRIMARY KEY, workspace_id TEXT NOT NULL, notebook_id TEXT NOT NULL, title TEXT,
+      is_deleted INTEGER NOT NULL DEFAULT 0, updated_at TEXT NOT NULL
+    );
+    CREATE TABLE audit_events (
+      id TEXT PRIMARY KEY, actor_type TEXT NOT NULL, actor_id TEXT, action TEXT NOT NULL,
+      entity_type TEXT NOT NULL, entity_id TEXT NOT NULL, metadata_json TEXT NOT NULL, created_at TEXT NOT NULL
+    );
+    INSERT INTO notebooks (id, workspace_id, name, slug, is_deleted, created_at, updated_at) VALUES
+      ('ws_1_inbox', 'ws_1', '等待分类', 'inbox', 0, '2026-09-10T00:00:00.000Z', '2026-09-10T00:00:00.000Z'),
+      ('nb_notes', 'ws_1', 'Notes', 'notes', 0, '2026-09-10T00:00:00.000Z', '2026-09-10T00:00:00.000Z');
+  `);
+  return { sqlite, db: createSelfHostedStorageAdapter(sqlite, "/tmp/edgeever-notebook-service-test-unused").db };
+};
+
+describe("notebook identity", () => {
+  test("recognizes legacy, workspace-scoped, and slug inbox identities", () => {
+    expect(isInboxNotebook({ id: "nb_inbox", slug: "notes" }, "ws_1")).toBe(true);
+    expect(isInboxNotebook({ id: workspaceInboxId("ws_1"), slug: "shou-ji-xiang" }, "ws_1")).toBe(true);
+    expect(isInboxNotebook({ id: "nb_other", slug: "inbox" }, "ws_1")).toBe(true);
+    expect(isInboxNotebook({ id: "nb_notes", slug: "notes" }, "ws_1")).toBe(false);
+  });
+
+  test("keeps the inbox slug when the default notebook is renamed", async () => {
+    const fixture = createFixture();
+    try {
+      const notebook = await updateNotebookRecord(
+        fixture.db,
+        "ws_1",
+        "ws_1_inbox",
+        { name: "收集箱" },
+        actor,
+      );
+      expect(notebook).toMatchObject({ id: "ws_1_inbox", name: "收集箱", slug: "inbox" });
+    } finally {
+      fixture.sqlite.close();
+    }
+  });
+
+  test("migration 0046 restores renamed, deleted, and missing inbox identities", () => {
+    const sqlite = new Database(":memory:");
+    try {
+      sqlite.exec("PRAGMA foreign_keys = ON");
+      for (const file of globSync("migrations/*.sql").sort().filter((file) => file.split("/").at(-1) < "0046")) {
+        sqlite.exec(readFileSync(file, "utf8"));
+      }
+      sqlite.exec(`
+        UPDATE notebooks SET name = '收集箱', slug = 'shou-ji-xiang' WHERE id = 'nb_inbox';
+        INSERT INTO workspaces (id, name) VALUES ('ws_empty', 'Empty');
+        INSERT INTO workspaces (id, name) VALUES ('ws_trashed', 'Trashed inbox');
+        INSERT INTO notebooks (id, workspace_id, name, slug, is_deleted, deleted_at)
+        VALUES ('ws_trashed_inbox', 'ws_trashed', '等待分类', 'inbox', 1, '2026-09-10T00:00:00.000Z');
+      `);
+      sqlite.exec(readFileSync("migrations/0046_restore_workspace_inbox_identity.sql", "utf8"));
+      expect(sqlite.query("SELECT name, slug, is_deleted FROM notebooks WHERE id = 'nb_inbox'").get()).toEqual({
+        name: "收集箱",
+        slug: "inbox",
+        is_deleted: 0,
+      });
+      expect(sqlite.query("SELECT slug, is_deleted FROM notebooks WHERE id = 'ws_trashed_inbox'").get()).toEqual({
+        slug: "inbox",
+        is_deleted: 0,
+      });
+      expect(sqlite.query("SELECT name, slug FROM notebooks WHERE id = 'ws_empty_inbox'").get()).toEqual({
+        name: "等待分类",
+        slug: "inbox",
+      });
+      expect(sqlite.query("PRAGMA foreign_key_check").all()).toEqual([]);
+    } finally {
+      sqlite.close();
+    }
+  });
+
+  test("rejects deleting a workspace inbox after it was renamed", async () => {
+    const fixture = createFixture();
+    try {
+      await updateNotebookRecord(fixture.db, "ws_1", "ws_1_inbox", { name: "收集箱" }, actor);
+      await expect(deleteNotebookRecord(fixture.db, "ws_1", "ws_1_inbox", actor)).rejects.toMatchObject({
+        code: "bad_request",
+      });
+      expect(
+        fixture.sqlite.query("SELECT is_deleted, slug FROM notebooks WHERE id = 'ws_1_inbox'").get(),
+      ).toEqual({ is_deleted: 0, slug: "inbox" });
+    } finally {
+      fixture.sqlite.close();
+    }
+  });
+});
diff --git a/apps/api/src/notebook-service.ts b/apps/api/src/notebook-service.ts
index aef91b01..ce1e88c5 100644
--- a/apps/api/src/notebook-service.ts
+++ b/apps/api/src/notebook-service.ts
@@ -4,6 +4,13 @@ import { AppError } from "./app-error";
 import { audit, auditStatement } from "./audit";
 import { createId, isoNow, slugify } from "./entity-utils";
 import type { DatabaseAdapter } from "./storage-contract";
+import { isInboxNotebook, workspaceInboxId } from "./workspace-provisioning";
+
+export { isInboxNotebook, workspaceInboxId } from "./workspace-provisioning";
+
+/** SQL identity for the workspace inbox: stable id first, slug as a fallback. */
+export const inboxNotebookIdentitySql = (alias: string) =>
+  `(${alias}.id = ${alias}.workspace_id || '_inbox' OR ${alias}.id = 'nb_inbox' OR ${alias}.slug = 'inbox')`;
 
 export type NotebookRow = {
   id: string;
@@ -195,6 +202,7 @@ export const updateNotebookRecord = async (
   const nextName = input.name ?? current.name;
   const nextParentId = input.parentId === undefined ? current.parentId : input.parentId;
   const nextSortOrder = input.sortOrder ?? current.sortOrder;
+  const nextSlug = isInboxNotebook(current, workspaceId) ? "inbox" : slugify(nextName);
   const now = isoNow();
 
   if (nextParentId === id) {
@@ -220,7 +228,7 @@ export const updateNotebookRecord = async (
          SET name = ?, slug = ?, parent_id = ?, sort_order = ?, updated_at = ?
          WHERE id = ? AND workspace_id = ? AND is_deleted = 0`
       )
-      .bind(nextName, slugify(nextName), nextParentId ?? null, nextSortOrder, now, id, workspaceId),
+      .bind(nextName, nextSlug, nextParentId ?? null, nextSortOrder, now, id, workspaceId),
     auditStatement(db, actor.actorType, actor.actorId, "notebook.update", "notebook", id, input),
   ]);
 
@@ -241,7 +249,7 @@ export const deleteNotebookRecord = async (
 ) => {
   const current = await getNotebook(db, workspaceId, id);
   if (!current) throw new AppError("not_found", "Notebook not found", 404);
-  if (id === "nb_inbox" || current.slug === "inbox") {
+  if (isInboxNotebook(current, workspaceId)) {
     throw new AppError("bad_request", "等待分类不能删除。", 400);
   }
 
@@ -266,8 +274,9 @@ export const deleteNotebookRecord = async (
   await db.prepare(
     `UPDATE notebooks
      SET is_deleted = 1, deleted_at = ?, updated_at = ?
-     WHERE id = ? AND workspace_id = ? AND slug <> 'inbox'`
-  ).bind(now, now, id, workspaceId).run();
+     WHERE id = ? AND workspace_id = ? AND slug <> 'inbox'
+       AND id <> 'nb_inbox' AND id <> ?`
+  ).bind(now, now, id, workspaceId, workspaceInboxId(workspaceId)).run();
   await audit(db, actor.actorType, actor.actorId, "notebook.delete", "notebook", id, {});
 };
 
diff --git a/apps/api/src/sync-routes.test.mjs b/apps/api/src/sync-routes.test.mjs
index b3c893a8..ca1c5af7 100644
--- a/apps/api/src/sync-routes.test.mjs
+++ b/apps/api/src/sync-routes.test.mjs
@@ -112,6 +112,67 @@ describe("sync route contracts", () => {
     }
   });
 
+  test("remaps dangling memos onto a renamed workspace inbox", async () => {
+    const sqlite = new Database(":memory:");
+    sqlite.exec(`
+      CREATE TABLE workspaces (id TEXT PRIMARY KEY, created_at TEXT NOT NULL);
+      CREATE TABLE notebooks (
+        id TEXT PRIMARY KEY, workspace_id TEXT NOT NULL, parent_id TEXT, name TEXT NOT NULL,
+        slug TEXT, icon TEXT, color TEXT, sort_order INTEGER NOT NULL DEFAULT 0,
+        is_deleted INTEGER NOT NULL DEFAULT 0, created_at TEXT NOT NULL, updated_at TEXT NOT NULL
+      );
+      CREATE TABLE memos (
+        id TEXT PRIMARY KEY, workspace_id TEXT NOT NULL, notebook_id TEXT NOT NULL, title TEXT,
+        excerpt TEXT NOT NULL DEFAULT '', tags_json TEXT NOT NULL DEFAULT '[]',
+        is_pinned INTEGER NOT NULL DEFAULT 0, is_archived INTEGER NOT NULL DEFAULT 0,
+        is_deleted INTEGER NOT NULL DEFAULT 0, source_memo_ids TEXT NOT NULL DEFAULT '[]',
+        merge_source_count INTEGER NOT NULL DEFAULT 0, merged_into_memo_id TEXT,
+        created_at TEXT NOT NULL, updated_at TEXT NOT NULL, deleted_at TEXT
+      );
+      CREATE TABLE memo_contents (
+        memo_id TEXT PRIMARY KEY, revision INTEGER NOT NULL DEFAULT 0, content_json TEXT NOT NULL,
+        content_markdown TEXT NOT NULL DEFAULT '', content_text TEXT NOT NULL DEFAULT '', content_hash TEXT NOT NULL
+      );
+      CREATE TABLE mobile_sync_changes (
+        id INTEGER PRIMARY KEY AUTOINCREMENT, workspace_id TEXT NOT NULL, entity_type TEXT NOT NULL,
+        entity_id TEXT NOT NULL, operation TEXT NOT NULL
+      );
+      INSERT INTO workspaces VALUES ('ws_1', '2026-09-10T00:00:00.000Z');
+      INSERT INTO notebooks (id, workspace_id, name, slug, is_deleted, created_at, updated_at) VALUES
+        ('ws_1_inbox', 'ws_1', '收集箱', 'shou-ji-xiang', 0, '2026-09-10T00:00:00.000Z', '2026-09-10T00:00:00.000Z');
+      INSERT INTO memos (
+        id, workspace_id, notebook_id, title, is_deleted, created_at, updated_at, deleted_at
+      ) VALUES (
+        'memo_trashed', 'ws_1', 'nb_deleted', 'Trashed', 1,
+        '2026-09-10T00:00:00.000Z', '2026-09-10T00:00:00.000Z', '2026-09-10T00:00:00.000Z'
+      );
+      INSERT INTO memo_contents VALUES ('memo_trashed', 1, '{"type":"doc"}', '', '', 'hash');
+    `);
+    const storage = createSelfHostedStorageAdapter(sqlite, "/tmp/edgeever-sync-renamed-inbox-unused");
+    const app = new Hono();
+    app.use("/api/v1/*", async (context, next) => {
+      context.set("auth", agentAuth);
+      await next();
+    });
+    registerSyncRoutes(app, {
+      clampNumber: (value, min, max) => Math.min(Math.max(value, min), max),
+      mapMemoDetail: (row) => ({
+        id: row.id,
+        notebookId: row.notebook_id,
+        title: row.title,
+        isDeleted: row.is_deleted === 1,
+      }),
+    });
+    try {
+      const response = await app.request("/api/v1/sync/bootstrap?limit=200", {}, { storage });
+      expect(response.status).toBe(200);
+      const payload = await response.json();
+      expect(payload.memos[0].notebookId).toBe("ws_1_inbox");
+    } finally {
+      sqlite.close();
+    }
+  });
+
   test("normalizes dangling references in incremental changes", async () => {
     const fixture = createSyncIntegrationFixture();
     try {
diff --git a/apps/api/src/sync-routes.ts b/apps/api/src/sync-routes.ts
index c6a550a5..7bf65e3d 100644
--- a/apps/api/src/sync-routes.ts
+++ b/apps/api/src/sync-routes.ts
@@ -1,7 +1,7 @@
 import type { MemoDetail } from "@edgeever/shared";
 import type { Hono } from "hono";
 import type { AppEnv } from "./api-context";
-import { mapNotebook, type NotebookRow } from "./notebook-service";
+import { inboxNotebookIdentitySql, mapNotebook, type NotebookRow } from "./notebook-service";
 import { getWorkspaceId, requireScopes } from "./request-auth";
 
 type MobileSyncChangeRow = {
@@ -60,8 +60,13 @@ const syncMemoNotebookIdSql = `CASE
   ELSE COALESCE((
     SELECT inbox.id FROM notebooks inbox
     WHERE inbox.workspace_id = m.workspace_id
-      AND inbox.slug = 'inbox'
       AND inbox.is_deleted = 0
+      AND ${inboxNotebookIdentitySql("inbox")}
+    ORDER BY CASE
+      WHEN inbox.id = inbox.workspace_id || '_inbox' THEN 0
+      WHEN inbox.id = 'nb_inbox' THEN 1
+      ELSE 2
+    END
     LIMIT 1
   ), m.notebook_id)
 END`;
diff --git a/apps/api/src/workspace-provisioning.test.mjs b/apps/api/src/workspace-provisioning.test.mjs
index 695561ba..b00f08e8 100644
--- a/apps/api/src/workspace-provisioning.test.mjs
+++ b/apps/api/src/workspace-provisioning.test.mjs
@@ -1,7 +1,10 @@
 import { describe, expect, test } from "bun:test";
 import {
+  createDefaultNotebookRows,
   createWorkspaceDefaultSeedStatements,
   ensureUserWorkspace,
+  isInboxNotebook,
+  workspaceInboxId,
 } from "./workspace-provisioning.ts";
 
 const statement = (sql, calls) => ({
@@ -20,6 +23,15 @@ const statement = (sql, calls) => ({
 });
 
 describe("workspace provisioning", () => {
+  test("uses a stable workspace-scoped inbox id", () => {
+    expect(workspaceInboxId("ws_1")).toBe("ws_1_inbox");
+    expect(createDefaultNotebookRows("ws_1")[0]).toMatchObject({
+      id: "ws_1_inbox",
+      slug: "inbox",
+    });
+    expect(isInboxNotebook({ id: "ws_1_inbox", slug: "shou-ji-xiang" }, "ws_1")).toBe(true);
+  });
+
   test("does not restore defaults while resolving an existing workspace", async () => {
     const calls = [];
     let batchCount = 0;
diff --git a/apps/api/src/workspace-provisioning.ts b/apps/api/src/workspace-provisioning.ts
index 7c6e1801..08faf26d 100644
--- a/apps/api/src/workspace-provisioning.ts
+++ b/apps/api/src/workspace-provisioning.ts
@@ -14,6 +14,17 @@ import type {
 } from "./storage-contract";
 
 export const DEFAULT_WORKSPACE_ID = "ws_default";
+export const LEGACY_INBOX_NOTEBOOK_ID = "nb_inbox";
+
+export const workspaceInboxId = (workspaceId: string) => `${workspaceId}_inbox`;
+
+export const isInboxNotebookId = (id: string, workspaceId: string) =>
+  id === LEGACY_INBOX_NOTEBOOK_ID || id === workspaceInboxId(workspaceId);
+
+export const isInboxNotebook = (
+  notebook: { id: string; slug?: string | null },
+  workspaceId: string,
+) => isInboxNotebookId(notebook.id, workspaceId) || notebook.slug === "inbox";
 
 export type UserWorkspace = {
   workspaceId: string;
@@ -29,7 +40,7 @@ export type DefaultNotebookRow = {
 };
 
 export const createDefaultNotebookRows = (workspaceId: string): DefaultNotebookRow[] => [
-  { id: `${workspaceId}_inbox`, name: "等待分类", slug: "inbox", color: "#0f766e", sortOrder: 10 },
+  { id: workspaceInboxId(workspaceId), name: "等待分类", slug: "inbox", color: "#0f766e", sortOrder: 10 },
   { id: `${workspaceId}_projects`, name: "工作项目", slug: "work-projects", color: "#2563eb", sortOrder: 20 },
   { id: `${workspaceId}_learning`, name: "学习资料", slug: "learning-resources", color: "#7c3aed", sortOrder: 30 },
   { id: `${workspaceId}_creative`, name: "灵感创作", slug: "creative-ideas", color: "#db2777", sortOrder: 40 },
diff --git a/apps/web/src/lib/desktop-sync.test.mjs b/apps/web/src/lib/desktop-sync.test.mjs
index aa702a9b..a524eb69 100644
--- a/apps/web/src/lib/desktop-sync.test.mjs
+++ b/apps/web/src/lib/desktop-sync.test.mjs
@@ -11,6 +11,7 @@ const {
   mergeSyncedMemos,
   normalizeDesktopMemoPayload,
   orderBootstrapNotebooks,
+  orderDesktopSyncChanges,
   resolveDesktopMemoSyncBase,
   rewriteStagedResource,
   shouldAttemptDesktopRecoveryPull,
@@ -102,6 +103,30 @@ describe("desktop bootstrap sync", () => {
       "grandchild",
     ]);
   });
+
+  test("applies notebook upserts before memos in an incremental change page", () => {
+    const memo = { entityType: "memo", entityId: "memo-1", operation: "upsert", notebook: null };
+    const child = {
+      entityType: "notebook",
+      entityId: "child",
+      operation: "upsert",
+      notebook: { id: "child", parentId: "parent" },
+    };
+    const parent = {
+      entityType: "notebook",
+      entityId: "parent",
+      operation: "upsert",
+      notebook: { id: "parent", parentId: null },
+    };
+    const deleted = { entityType: "notebook", entityId: "gone", operation: "delete", notebook: null };
+
+    expect(orderDesktopSyncChanges([memo, child, deleted, parent]).map((change) => change.entityId)).toEqual([
+      "parent",
+      "child",
+      "gone",
+      "memo-1",
+    ]);
+  });
 });
 
 describe("desktop memo sync base", () => {
diff --git a/apps/web/src/lib/desktop-sync.ts b/apps/web/src/lib/desktop-sync.ts
index df157a77..9ec79cda 100644
--- a/apps/web/src/lib/desktop-sync.ts
+++ b/apps/web/src/lib/desktop-sync.ts
@@ -495,9 +495,9 @@ export const shouldAttemptDesktopRecoveryPull = (
   && phase !== "finalize_resource_remap"
   && shouldPullDesktopChanges(status, online);
 
-export const orderBootstrapNotebooks = (notebooks: SyncBootstrapResponse["notebooks"]) => {
+export const orderBootstrapNotebooks = <T extends { id: string; parentId?: string | null }>(notebooks: T[]) => {
   const remaining = new Map(notebooks.map((notebook) => [notebook.id, notebook]));
-  const ordered: SyncBootstrapResponse["notebooks"] = [];
+  const ordered: T[] = [];
 
   while (remaining.size > 0) {
     let added = 0;
@@ -516,6 +516,32 @@ export const orderBootstrapNotebooks = (notebooks: SyncBootstrapResponse["notebo
   return ordered;
 };
 
+export const orderDesktopSyncChanges = <T extends {
+  entityType: string;
+  entityId: string;
+  operation: string;
+  notebook?: { id: string; parentId?: string | null } | null;
+}>(changes: T[]) => {
+  const notebookUpserts: T[] = [];
+  const notebookDeletes: T[] = [];
+  const rest: T[] = [];
+  for (const change of changes) {
+    if (change.entityType !== "notebook") rest.push(change);
+    else if (change.operation === "delete") notebookDeletes.push(change);
+    else notebookUpserts.push(change);
+  }
+  const byId = new Map(notebookUpserts.map((change) => [change.entityId, change]));
+  const orderedUpserts = orderBootstrapNotebooks(
+    notebookUpserts.map((change) => change.notebook ?? { id: change.entityId, parentId: null }),
+  ).flatMap((notebook) => {
+    const change = byId.get(notebook.id);
+    return change ? [change] : [];
+  });
+  const orderedIds = new Set(orderedUpserts.map((change) => change.entityId));
+  const leftoverUpserts = notebookUpserts.filter((change) => !orderedIds.has(change.entityId));
+  return [...orderedUpserts, ...leftoverUpserts, ...notebookDeletes, ...rest];
+};
+
 const bootstrapDesktopMirror = async (reset: boolean) => {
   await request("sync.bootstrap.prepare", reset ? { reset: true } : {});
   let afterId: string | null = null;
@@ -549,7 +575,7 @@ const pullRemoteChanges = async () => {
     return;
   }
   while (response.changes.length > 0) {
-    await request("sync.apply", { changes: response.changes });
+    await request("sync.apply", { changes: orderDesktopSyncChanges(response.changes) });
     cursor = response.cursor;
     if (!response.hasMore) break;
     response = await api.syncChanges({ cursor, limit: 200 });
diff --git a/crates/desktop-sidecar/src/catalog.rs b/crates/desktop-sidecar/src/catalog.rs
index 2b7b6f7b..ef82420d 100644
--- a/crates/desktop-sidecar/src/catalog.rs
+++ b/crates/desktop-sidecar/src/catalog.rs
@@ -5,6 +5,10 @@ use std::time::{SystemTime, UNIX_EPOCH};
 use crate::memo::memo_value;
 use crate::{enqueue_change, markdown_doc, now_id, string_param, tags_from_json};
 
+pub(crate) fn is_inbox_notebook(id: &str, slug: Option<&str>) -> bool {
+    slug == Some("inbox") || id == "nb_inbox" || id.ends_with("_inbox")
+}
+
 pub(crate) fn list_notebooks(database: &Connection) -> Result<Value, String> {
     let mut statement = database.prepare(
         "SELECT n.id, n.parent_id, n.name, n.slug, n.icon, n.color, n.sort_order, n.created_at, n.updated_at,
@@ -65,7 +69,19 @@ pub(crate) fn create_notebook(database: &Connection, params: &Value) -> Result<V
 pub(crate) fn update_notebook(database: &Connection, params: &Value) -> Result<Value, String> {
     let notebook_id = string_param(params, "notebookId")?;
     if let Some(name) = params.get("name").and_then(Value::as_str) {
-        database.execute("UPDATE notebooks SET name = ?1, slug = ?2, updated_at = strftime('%Y-%m-%dT%H:%M:%fZ','now') WHERE id = ?3 AND is_deleted = 0", rusqlite::params![name, name.to_lowercase().replace(' ', "-"), notebook_id]).map_err(|e| e.to_string())?;
+        let current_slug: Option<String> = database
+            .query_row(
+                "SELECT slug FROM notebooks WHERE id = ?1",
+                [&notebook_id],
+                |row| row.get(0),
+            )
+            .map_err(|e| e.to_string())?;
+        let slug = if is_inbox_notebook(&notebook_id, current_slug.as_deref()) {
+            "inbox".to_owned()
+        } else {
+            name.to_lowercase().replace(' ', "-")
+        };
+        database.execute("UPDATE notebooks SET name = ?1, slug = ?2, updated_at = strftime('%Y-%m-%dT%H:%M:%fZ','now') WHERE id = ?3 AND is_deleted = 0", rusqlite::params![name, slug, notebook_id]).map_err(|e| e.to_string())?;
     }
     if params.get("parentId").is_some() {
         database.execute("UPDATE notebooks SET parent_id = ?1, updated_at = strftime('%Y-%m-%dT%H:%M:%fZ','now') WHERE id = ?2 AND is_deleted = 0", rusqlite::params![params.get("parentId").and_then(Value::as_str), notebook_id]).map_err(|e| e.to_string())?;
@@ -97,7 +113,7 @@ pub(crate) fn delete_notebook(database: &Connection, params: &Value) -> Result<V
     if child_count > 0 || memo_count > 0 {
         return Err("notebook_not_empty".to_owned());
     }
-    database.execute("UPDATE notebooks SET is_deleted = 1, deleted_at = strftime('%Y-%m-%dT%H:%M:%fZ','now'), updated_at = strftime('%Y-%m-%dT%H:%M:%fZ','now') WHERE id = ?1 AND slug <> 'inbox'", [&notebook_id]).map_err(|e| e.to_string())?;
+    database.execute("UPDATE notebooks SET is_deleted = 1, deleted_at = strftime('%Y-%m-%dT%H:%M:%fZ','now'), updated_at = strftime('%Y-%m-%dT%H:%M:%fZ','now') WHERE id = ?1 AND slug <> 'inbox' AND id <> 'nb_inbox' AND id NOT GLOB '*_inbox'", [&notebook_id]).map_err(|e| e.to_string())?;
     enqueue_change(
         database,
         "notebook.delete",
diff --git a/crates/desktop-sidecar/src/main.rs b/crates/desktop-sidecar/src/main.rs
index 2687f33c..822ffd2b 100644
--- a/crates/desktop-sidecar/src/main.rs
+++ b/crates/desktop-sidecar/src/main.rs
@@ -471,4 +471,299 @@ mod tests {
             "nb_inbox"
         );
     }
+
+    #[test]
+    fn sync_apply_recreates_inbox_and_orders_notebooks_before_memos() {
+        let database = Connection::open_in_memory().unwrap();
+        database
+            .execute_batch(
+                "PRAGMA foreign_keys = ON;
+                 CREATE TABLE notebooks (
+                   id TEXT PRIMARY KEY,
+                   parent_id TEXT REFERENCES notebooks(id),
+                   name TEXT NOT NULL,
+                   slug TEXT,
+                   icon TEXT,
+                   color TEXT,
+                   sort_order INTEGER NOT NULL DEFAULT 0,
+                   is_deleted INTEGER NOT NULL DEFAULT 0,
+                   created_at TEXT NOT NULL DEFAULT 'now',
+                   updated_at TEXT NOT NULL DEFAULT 'now',
+                   deleted_at TEXT
+                 );
+                 CREATE TABLE memos (
+                   id TEXT PRIMARY KEY,
+                   notebook_id TEXT NOT NULL REFERENCES notebooks(id),
+                   title TEXT,
+                   excerpt TEXT NOT NULL,
+                   tags_json TEXT NOT NULL,
+                   is_pinned INTEGER NOT NULL,
+                   is_archived INTEGER NOT NULL,
+                   is_deleted INTEGER NOT NULL,
+                   source_memo_ids TEXT NOT NULL,
+                   merge_source_count INTEGER NOT NULL,
+                   merged_into_memo_id TEXT REFERENCES memos(id),
+                   created_at TEXT NOT NULL,
+                   updated_at TEXT NOT NULL,
+                   deleted_at TEXT
+                 );
+                 CREATE TABLE memo_contents (
+                   memo_id TEXT PRIMARY KEY REFERENCES memos(id) ON DELETE CASCADE,
+                   content_json TEXT NOT NULL,
+                   content_markdown TEXT NOT NULL,
+                   content_text TEXT NOT NULL,
+                   content_hash TEXT NOT NULL,
+                   revision INTEGER NOT NULL,
+                   updated_at TEXT NOT NULL DEFAULT 'now'
+                 );",
+            )
+            .unwrap();
+
+        let memo = |id: &str, notebook_id: &str| {
+            json!({
+                "id": id,
+                "notebookId": notebook_id,
+                "title": id,
+                "excerpt": "",
+                "tags": [],
+                "isPinned": false,
+                "isArchived": false,
+                "isDeleted": true,
+                "sourceMemoIds": [],
+                "mergeSourceCount": 0,
+                "mergedIntoMemoId": null,
+                "createdAt": "2026-09-10T00:00:00.000Z",
+                "updatedAt": "2026-09-10T00:00:00.000Z",
+                "deletedAt": "2026-09-10T00:00:00.000Z",
+                "contentJson": { "type": "doc", "content": [] },
+                "contentMarkdown": "",
+                "contentText": "",
+                "contentHash": id,
+                "revision": 0
+            })
+        };
+
+        apply_sync_changes(
+            &database,
+            &json!({ "changes": [{
+                "entityType": "memo",
+                "operation": "upsert",
+                "entityId": "orphan-memo",
+                "memo": memo("orphan-memo", "missing-notebook")
+            }] }),
+        )
+        .unwrap();
+        assert_eq!(
+            database
+                .query_row(
+                    "SELECT notebook_id FROM memos WHERE id = 'orphan-memo'",
+                    [],
+                    |row| row.get::<_, String>(0),
+                )
+                .unwrap(),
+            "nb_inbox"
+        );
+
+        apply_sync_changes(
+            &database,
+            &json!({ "changes": [
+                {
+                    "entityType": "memo",
+                    "operation": "upsert",
+                    "entityId": "page-memo",
+                    "memo": memo("page-memo", "still-missing")
+                },
+                {
+                    "entityType": "notebook",
+                    "operation": "upsert",
+                    "entityId": "child",
+                    "notebook": {
+                        "name": "Child",
+                        "slug": "child",
+                        "parentId": "parent",
+                        "createdAt": "2026-09-10T00:00:00.000Z",
+                        "updatedAt": "2026-09-10T00:00:00.000Z"
+                    }
+                },
+                {
+                    "entityType": "notebook",
+                    "operation": "upsert",
+                    "entityId": "ws_1_inbox",
+                    "notebook": {
+                        "name": "收集箱",
+                        "slug": "shou-ji-xiang",
+                        "parentId": null,
+                        "createdAt": "2026-09-10T00:00:00.000Z",
+                        "updatedAt": "2026-09-10T00:00:00.000Z"
+                    }
+                },
+                {
+                    "entityType": "notebook",
+                    "operation": "upsert",
+                    "entityId": "parent",
+                    "notebook": {
+                        "name": "Parent",
+                        "slug": "parent",
+                        "parentId": null,
+                        "createdAt": "2026-09-10T00:00:00.000Z",
+                        "updatedAt": "2026-09-10T00:00:00.000Z"
+                    }
+                }
+            ] }),
+        )
+        .unwrap();
+
+        assert_eq!(
+            database
+                .query_row(
+                    "SELECT slug FROM notebooks WHERE id = 'ws_1_inbox'",
+                    [],
+                    |row| row.get::<_, String>(0),
+                )
+                .unwrap(),
+            "inbox"
+        );
+        assert_eq!(
+            database
+                .query_row(
+                    "SELECT parent_id FROM notebooks WHERE id = 'child'",
+                    [],
+                    |row| row.get::<_, Option<String>>(0),
+                )
+                .unwrap()
+                .as_deref(),
+            Some("parent")
+        );
+        assert_eq!(
+            database
+                .query_row(
+                    "SELECT notebook_id FROM memos WHERE id = 'page-memo'",
+                    [],
+                    |row| row.get::<_, String>(0),
+                )
+                .unwrap(),
+            "nb_inbox"
+        );
+    }
+
+    #[test]
+    fn sync_apply_falls_back_to_renamed_workspace_inbox() {
+        let database = Connection::open_in_memory().unwrap();
+        database
+            .execute_batch(
+                "PRAGMA foreign_keys = ON;
+                 CREATE TABLE notebooks (
+                   id TEXT PRIMARY KEY,
+                   parent_id TEXT REFERENCES notebooks(id),
+                   name TEXT NOT NULL,
+                   slug TEXT,
+                   icon TEXT,
+                   color TEXT,
+                   sort_order INTEGER NOT NULL DEFAULT 0,
+                   is_deleted INTEGER NOT NULL DEFAULT 0,
+                   created_at TEXT NOT NULL DEFAULT 'now',
+                   updated_at TEXT NOT NULL DEFAULT 'now',
+                   deleted_at TEXT
+                 );
+                 CREATE TABLE memos (
+                   id TEXT PRIMARY KEY,
+                   notebook_id TEXT NOT NULL REFERENCES notebooks(id),
+                   title TEXT,
+                   excerpt TEXT NOT NULL,
+                   tags_json TEXT NOT NULL,
+                   is_pinned INTEGER NOT NULL,
+                   is_archived INTEGER NOT NULL,
+                   is_deleted INTEGER NOT NULL,
+                   source_memo_ids TEXT NOT NULL,
+                   merge_source_count INTEGER NOT NULL,
+                   merged_into_memo_id TEXT REFERENCES memos(id),
+                   created_at TEXT NOT NULL,
+                   updated_at TEXT NOT NULL,
+                   deleted_at TEXT
+                 );
+                 CREATE TABLE memo_contents (
+                   memo_id TEXT PRIMARY KEY REFERENCES memos(id) ON DELETE CASCADE,
+                   content_json TEXT NOT NULL,
+                   content_markdown TEXT NOT NULL,
+                   content_text TEXT NOT NULL,
+                   content_hash TEXT NOT NULL,
+                   revision INTEGER NOT NULL,
+                   updated_at TEXT NOT NULL DEFAULT 'now'
+                 );",
+            )
+            .unwrap();
+
+        apply_sync_changes(
+            &database,
+            &json!({ "changes": [
+                {
+                    "entityType": "memo",
+                    "operation": "upsert",
+                    "entityId": "trashed",
+                    "memo": {
+                        "id": "trashed",
+                        "notebookId": "deleted-notebook",
+                        "title": "trashed",
+                        "excerpt": "",
+                        "tags": [],
+                        "isPinned": false,
+                        "isArchived": false,
+                        "isDeleted": true,
+                        "sourceMemoIds": [],
+                        "mergeSourceCount": 0,
+                        "mergedIntoMemoId": null,
+                        "createdAt": "2026-09-10T00:00:00.000Z",
+                        "updatedAt": "2026-09-10T00:00:00.000Z",
+                        "deletedAt": "2026-09-10T00:00:00.000Z",
+                        "contentJson": { "type": "doc", "content": [] },
+                        "contentMarkdown": "",
+                        "contentText": "",
+                        "contentHash": "trashed",
+                        "revision": 0
+                    }
+                },
+                {
+                    "entityType": "notebook",
+                    "operation": "upsert",
+                    "entityId": "ws_1_inbox",
+                    "notebook": {
+                        "name": "收集箱",
+                        "slug": "shou-ji-xiang",
+                        "parentId": null,
+                        "createdAt": "2026-09-10T00:00:00.000Z",
+                        "updatedAt": "2026-09-10T00:00:00.000Z"
+                    }
+                }
+            ] }),
+        )
+        .unwrap();
+
+        assert_eq!(
+            database
+                .query_row(
+                    "SELECT id, slug FROM notebooks WHERE id = 'ws_1_inbox'",
+                    [],
+                    |row| Ok((row.get::<_, String>(0)?, row.get::<_, String>(1)?)),
+                )
+                .unwrap(),
+            ("ws_1_inbox".to_owned(), "inbox".to_owned())
+        );
+        assert_eq!(
+            database
+                .query_row(
+                    "SELECT notebook_id FROM memos WHERE id = 'trashed'",
+                    [],
+                    |row| row.get::<_, String>(0),
+                )
+                .unwrap(),
+            "ws_1_inbox"
+        );
+        assert_eq!(
+            database
+                .query_row("SELECT COUNT(*) FROM notebooks", [], |row| row
+                    .get::<_, i64>(0))
+                .unwrap(),
+            1
+        );
+    }
 }
diff --git a/crates/desktop-sidecar/src/sync.rs b/crates/desktop-sidecar/src/sync.rs
index a77e8401..83bdefec 100644
--- a/crates/desktop-sidecar/src/sync.rs
+++ b/crates/desktop-sidecar/src/sync.rs
@@ -1,6 +1,7 @@
-use rusqlite::Connection;
+use rusqlite::{Connection, OptionalExtension, Transaction};
 use serde_json::{json, Value};
 
+use crate::catalog::is_inbox_notebook;
 use crate::memo::{create_memo, memo_value};
 use crate::{bool_param, enqueue_change, memo_remap_base_key, meta_value, set_meta, string_param};
 
@@ -603,110 +604,263 @@ pub(crate) fn sync_outbox_discard(database: &Connection, params: &Value) -> Resu
     Ok(json!({ "ok": true }))
 }
 
+fn order_sync_change_indices(changes: &[Value]) -> Vec<usize> {
+    let mut notebook_upserts = Vec::new();
+    let mut notebook_deletes = Vec::new();
+    let mut rest = Vec::new();
+    for (index, change) in changes.iter().enumerate() {
+        let entity_type = change
+            .get("entityType")
+            .and_then(Value::as_str)
+            .unwrap_or("");
+        let operation = change
+            .get("operation")
+            .and_then(Value::as_str)
+            .unwrap_or("");
+        if entity_type == "notebook" {
+            if operation == "delete" {
+                notebook_deletes.push(index);
+            } else {
+                notebook_upserts.push(index);
+            }
+        } else {
+            rest.push(index);
+        }
+    }
+
+    let mut remaining: std::collections::HashSet<usize> =
+        notebook_upserts.iter().copied().collect();
+    let mut ordered_upserts = Vec::new();
+    while !remaining.is_empty() {
+        let ready: Vec<usize> = notebook_upserts
+            .iter()
+            .copied()
+            .filter(|index| remaining.contains(index))
+            .filter(|index| {
+                let parent_id = changes[*index]
+                    .get("notebook")
+                    .and_then(|notebook| notebook.get("parentId"))
+                    .and_then(Value::as_str);
+                match parent_id {
+                    Some(parent_id) => !notebook_upserts.iter().copied().any(|candidate| {
+                        remaining.contains(&candidate)
+                            && changes[candidate].get("entityId").and_then(Value::as_str)
+                                == Some(parent_id)
+                    }),
+                    None => true,
+                }
+            })
+            .collect();
+        if ready.is_empty() {
+            ordered_upserts.extend(
+                notebook_upserts
+                    .iter()
+                    .copied()
+                    .filter(|index| remaining.contains(index)),
+            );
+            break;
+        }
+        for index in ready {
+            remaining.remove(&index);
+            ordered_upserts.push(index);
+        }
+    }
+
+    ordered_upserts
+        .into_iter()
+        .chain(notebook_deletes)
+        .chain(rest)
+        .collect()
+}
+
+fn ensure_active_inbox(tx: &Transaction<'_>) -> Result<String, String> {
+    if let Some(id) = tx
+        .query_row(
+            "SELECT id FROM notebooks
+             WHERE is_deleted = 0
+               AND (slug = 'inbox' OR id = 'nb_inbox' OR id GLOB '*_inbox')
+             ORDER BY CASE WHEN slug = 'inbox' THEN 0 WHEN id = 'nb_inbox' THEN 1 ELSE 2 END, id
+             LIMIT 1",
+            [],
+            |row| row.get::<_, String>(0),
+        )
+        .optional()
+        .map_err(|e| e.to_string())?
+    {
+        return Ok(id);
+    }
+
+    if let Some(id) = tx
+        .query_row(
+            "SELECT id FROM notebooks
+             WHERE slug = 'inbox' OR id = 'nb_inbox' OR id GLOB '*_inbox'
+             ORDER BY CASE WHEN id = 'nb_inbox' THEN 0 WHEN id GLOB '*_inbox' THEN 1 ELSE 2 END, id
+             LIMIT 1",
+            [],
+            |row| row.get::<_, String>(0),
+        )
+        .optional()
+        .map_err(|e| e.to_string())?
+    {
+        tx.execute(
+            "UPDATE notebooks
+             SET is_deleted = 0, deleted_at = NULL, slug = 'inbox', parent_id = NULL,
+                 updated_at = strftime('%Y-%m-%dT%H:%M:%fZ','now')
+             WHERE id = ?1",
+            [&id],
+        )
+        .map_err(|e| e.to_string())?;
+        return Ok(id);
+    }
+
+    tx.execute(
+        "INSERT INTO notebooks (id, parent_id, name, slug, icon, color, sort_order, created_at, updated_at)
+         VALUES ('nb_inbox', NULL, '等待分类', 'inbox', 'notebook', '#0f766e', 10,
+                 strftime('%Y-%m-%dT%H:%M:%fZ','now'), strftime('%Y-%m-%dT%H:%M:%fZ','now'))",
+        [],
+    )
+    .map_err(|e| e.to_string())?;
+    Ok("nb_inbox".to_owned())
+}
+
+fn resolve_sync_notebook_id(
+    tx: &Transaction<'_>,
+    requested_notebook_id: &str,
+) -> Result<String, String> {
+    let active = tx
+        .query_row(
+            "SELECT id FROM notebooks WHERE id = ?1 AND is_deleted = 0",
+            [requested_notebook_id],
+            |row| row.get::<_, String>(0),
+        )
+        .optional()
+        .map_err(|e| e.to_string())?;
+    if let Some(id) = active {
+        return Ok(id);
+    }
+    ensure_active_inbox(tx)
+}
+
+fn apply_one_sync_change(
+    tx: &Transaction<'_>,
+    change: &Value,
+    rebuilding: bool,
+) -> Result<(), String> {
+    let entity_type = string_param(change, "entityType")?;
+    let operation = string_param(change, "operation")?;
+    let entity_id = string_param(change, "entityId")?;
+    if rebuilding {
+        let preserved_table = if entity_type == "notebook" {
+            "_edgeever_bootstrap_preserved_notebooks"
+        } else {
+            "_edgeever_bootstrap_preserved_memos"
+        };
+        let preserved = tx
+            .query_row(
+                &format!("SELECT EXISTS(SELECT 1 FROM {preserved_table} WHERE id = ?1)"),
+                [&entity_id],
+                |row| row.get::<_, bool>(0),
+            )
+            .unwrap_or(false);
+        if preserved {
+            return Ok(());
+        }
+    }
+    if entity_type == "notebook" {
+        if operation == "delete" {
+            tx.execute("UPDATE notebooks SET is_deleted = 1, deleted_at = strftime('%Y-%m-%dT%H:%M:%fZ','now') WHERE id = ?1 AND slug <> 'inbox' AND id <> 'nb_inbox' AND id NOT GLOB '*_inbox'", [&entity_id]).map_err(|e| e.to_string())?;
+            return Ok(());
+        }
+        let notebook = change
+            .get("notebook")
+            .ok_or_else(|| "Missing notebook change payload".to_owned())?;
+        let requested_slug = notebook.get("slug").and_then(Value::as_str);
+        let inbox = is_inbox_notebook(&entity_id, requested_slug);
+        let requested_parent = notebook
+            .get("parentId")
+            .and_then(Value::as_str)
+            .filter(|id| !id.is_empty() && !inbox);
+        let parent_id = if let Some(parent_id) = requested_parent {
+            let exists: bool = tx
+                .query_row(
+                    "SELECT EXISTS(SELECT 1 FROM notebooks WHERE id = ?1)",
+                    [parent_id],
+                    |row| row.get(0),
+                )
+                .map_err(|e| e.to_string())?;
+            exists.then_some(parent_id)
+        } else {
+            None
+        };
+        let slug = if inbox { Some("inbox") } else { requested_slug };
+        tx.execute("INSERT INTO notebooks (id, parent_id, name, slug, icon, color, sort_order, created_at, updated_at) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9) ON CONFLICT(id) DO UPDATE SET parent_id=excluded.parent_id, name=excluded.name, slug=excluded.slug, icon=excluded.icon, color=excluded.color, sort_order=excluded.sort_order, updated_at=excluded.updated_at, is_deleted=0", rusqlite::params![entity_id, parent_id, string_param(notebook, "name")?, slug, notebook.get("icon").and_then(Value::as_str), notebook.get("color").and_then(Value::as_str), notebook.get("sortOrder").and_then(Value::as_i64).unwrap_or(0), string_param(notebook, "createdAt")?, string_param(notebook, "updatedAt")?]).map_err(|e| e.to_string())?;
+        return Ok(());
+    }
+    if operation == "delete" {
+        tx.execute("UPDATE memos SET is_deleted = 1, deleted_at = strftime('%Y-%m-%dT%H:%M:%fZ','now') WHERE id = ?1", [&entity_id]).map_err(|e| e.to_string())?;
+        return Ok(());
+    }
+    let memo = change
+        .get("memo")
+        .ok_or_else(|| "Missing memo change payload".to_owned())?;
+    let tags = memo
+        .get("tags")
+        .cloned()
+        .unwrap_or_else(|| json!([]))
+        .to_string();
+    let source_memo_ids = memo
+        .get("sourceMemoIds")
+        .and_then(Value::as_array)
+        .cloned()
+        .unwrap_or_default();
+    let source_ids = Value::Array(source_memo_ids.clone()).to_string();
+    let requested_merge_target = memo.get("mergedIntoMemoId").and_then(Value::as_str);
+    // Bootstrap pages are ordered by memo id, not by merge dependency. A
+    // deleted source can therefore arrive before the merged memo it
+    // references. Cache the source without the unresolved foreign key;
+    // the target's sourceMemoIds backfills it when that page arrives.
+    let merge_target = if let Some(target_id) = requested_merge_target {
+        let target_exists = tx
+            .query_row(
+                "SELECT EXISTS(SELECT 1 FROM memos WHERE id = ?1)",
+                [target_id],
+                |row| row.get::<_, bool>(0),
+            )
+            .map_err(|e| e.to_string())?;
+        target_exists.then_some(target_id)
+    } else {
+        None
+    };
+    let content_json = memo
+        .get("contentJson")
+        .cloned()
+        .unwrap_or_else(|| json!({"type":"doc","content":[]}));
+    let requested_notebook_id = string_param(memo, "notebookId")?;
+    let notebook_id = resolve_sync_notebook_id(tx, &requested_notebook_id)?;
+    tx.execute("INSERT INTO memos (id, notebook_id, title, excerpt, tags_json, is_pinned, is_archived, is_deleted, source_memo_ids, merge_source_count, merged_into_memo_id, created_at, updated_at, deleted_at) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13, ?14) ON CONFLICT(id) DO UPDATE SET notebook_id=excluded.notebook_id, title=excluded.title, excerpt=excluded.excerpt, tags_json=excluded.tags_json, is_pinned=excluded.is_pinned, is_archived=excluded.is_archived, is_deleted=excluded.is_deleted, source_memo_ids=excluded.source_memo_ids, merge_source_count=excluded.merge_source_count, merged_into_memo_id=excluded.merged_into_memo_id, updated_at=excluded.updated_at, deleted_at=excluded.deleted_at", rusqlite::params![entity_id, notebook_id, memo.get("title").and_then(Value::as_str), string_param(memo, "excerpt")?, tags, memo.get("isPinned").and_then(Value::as_bool).unwrap_or(false) as i64, memo.get("isArchived").and_then(Value::as_bool).unwrap_or(false) as i64, memo.get("isDeleted").and_then(Value::as_bool).unwrap_or(false) as i64, source_ids, memo.get("mergeSourceCount").and_then(Value::as_i64).unwrap_or(0), merge_target, string_param(memo, "createdAt")?, string_param(memo, "updatedAt")?, memo.get("deletedAt").and_then(Value::as_str)]).map_err(|e| e.to_string())?;
+    tx.execute("INSERT INTO memo_contents (memo_id, content_json, content_markdown, content_text, content_hash, revision) VALUES (?1, ?2, ?3, ?4, ?5, ?6) ON CONFLICT(memo_id) DO UPDATE SET content_json=excluded.content_json, content_markdown=excluded.content_markdown, content_text=excluded.content_text, content_hash=excluded.content_hash, revision=excluded.revision, updated_at=strftime('%Y-%m-%dT%H:%M:%fZ','now')", rusqlite::params![entity_id, content_json.to_string(), string_param(memo, "contentMarkdown")?, string_param(memo, "contentText")?, string_param(memo, "contentHash")?, memo.get("revision").and_then(Value::as_i64).unwrap_or(0)]).map_err(|e| e.to_string())?;
+    for source_id in source_memo_ids.iter().filter_map(Value::as_str) {
+        tx.execute(
+            "UPDATE memos SET merged_into_memo_id = ?1 WHERE id = ?2",
+            rusqlite::params![entity_id, source_id],
+        )
+        .map_err(|e| e.to_string())?;
+    }
+    Ok(())
+}
+
 pub(crate) fn apply_sync_changes(database: &Connection, params: &Value) -> Result<Value, String> {
     let changes = params
         .get("changes")
         .and_then(Value::as_array)
         .ok_or_else(|| "Missing changes array".to_owned())?;
     let rebuilding = meta_value(database, SYNC_BOOTSTRAP_RESET_KEY).as_deref() == Some("1");
+    let ordered = order_sync_change_indices(changes);
     let tx = database
         .unchecked_transaction()
         .map_err(|e| e.to_string())?;
-    for change in changes {
-        let entity_type = string_param(change, "entityType")?;
-        let operation = string_param(change, "operation")?;
-        let entity_id = string_param(change, "entityId")?;
-        if rebuilding {
-            let preserved_table = if entity_type == "notebook" {
-                "_edgeever_bootstrap_preserved_notebooks"
-            } else {
-                "_edgeever_bootstrap_preserved_memos"
-            };
-            let preserved = tx
-                .query_row(
-                    &format!("SELECT EXISTS(SELECT 1 FROM {preserved_table} WHERE id = ?1)"),
-                    [&entity_id],
-                    |row| row.get::<_, bool>(0),
-                )
-                .unwrap_or(false);
-            if preserved {
-                continue;
-            }
-        }
-        if entity_type == "notebook" {
-            if operation == "delete" {
-                tx.execute("UPDATE notebooks SET is_deleted = 1, deleted_at = strftime('%Y-%m-%dT%H:%M:%fZ','now') WHERE id = ?1", [&entity_id]).map_err(|e| e.to_string())?;
-                continue;
-            }
-            let notebook = change
-                .get("notebook")
-                .ok_or_else(|| "Missing notebook change payload".to_owned())?;
-            tx.execute("INSERT INTO notebooks (id, parent_id, name, slug, icon, color, sort_order, created_at, updated_at) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9) ON CONFLICT(id) DO UPDATE SET parent_id=excluded.parent_id, name=excluded.name, slug=excluded.slug, icon=excluded.icon, color=excluded.color, sort_order=excluded.sort_order, updated_at=excluded.updated_at, is_deleted=0", rusqlite::params![entity_id, notebook.get("parentId").and_then(Value::as_str), string_param(notebook, "name")?, notebook.get("slug").and_then(Value::as_str), notebook.get("icon").and_then(Value::as_str), notebook.get("color").and_then(Value::as_str), notebook.get("sortOrder").and_then(Value::as_i64).unwrap_or(0), string_param(notebook, "createdAt")?, string_param(notebook, "updatedAt")?]).map_err(|e| e.to_string())?;
-            continue;
-        }
-        if operation == "delete" {
-            tx.execute("UPDATE memos SET is_deleted = 1, deleted_at = strftime('%Y-%m-%dT%H:%M:%fZ','now') WHERE id = ?1", [&entity_id]).map_err(|e| e.to_string())?;
-            continue;
-        }
-        let memo = change
-            .get("memo")
-            .ok_or_else(|| "Missing memo change payload".to_owned())?;
-        let tags = memo
-            .get("tags")
-            .cloned()
-            .unwrap_or_else(|| json!([]))
-            .to_string();
-        let source_memo_ids = memo
-            .get("sourceMemoIds")
-            .and_then(Value::as_array)
-            .cloned()
-            .unwrap_or_default();
-        let source_ids = Value::Array(source_memo_ids.clone()).to_string();
-        let requested_merge_target = memo.get("mergedIntoMemoId").and_then(Value::as_str);
-        // Bootstrap pages are ordered by memo id, not by merge dependency. A
-        // deleted source can therefore arrive before the merged memo it
-        // references. Cache the source without the unresolved foreign key;
-        // the target's sourceMemoIds backfills it when that page arrives.
-        let merge_target = if let Some(target_id) = requested_merge_target {
-            let target_exists = tx
-                .query_row(
-                    "SELECT EXISTS(SELECT 1 FROM memos WHERE id = ?1)",
-                    [target_id],
-                    |row| row.get::<_, bool>(0),
-                )
-                .map_err(|e| e.to_string())?;
-            target_exists.then_some(target_id)
-        } else {
-            None
-        };
-        let content_json = memo
-            .get("contentJson")
-            .cloned()
-            .unwrap_or_else(|| json!({"type":"doc","content":[]}));
-        let requested_notebook_id = string_param(memo, "notebookId")?;
-        let notebook_id = tx
-            .query_row(
-                "SELECT CASE
-                   WHEN EXISTS(SELECT 1 FROM notebooks WHERE id = ?1 AND is_deleted = 0) THEN ?1
-                   ELSE (SELECT id FROM notebooks WHERE slug = 'inbox' AND is_deleted = 0 ORDER BY id LIMIT 1)
-                 END",
-                [&requested_notebook_id],
-                |row| row.get::<_, Option<String>>(0),
-            )
-            .map_err(|e| e.to_string())?
-            .ok_or_else(|| {
-                "Sync memo references an unavailable notebook, and the local inbox is unavailable"
-                    .to_owned()
-            })?;
-        tx.execute("INSERT INTO memos (id, notebook_id, title, excerpt, tags_json, is_pinned, is_archived, is_deleted, source_memo_ids, merge_source_count, merged_into_memo_id, created_at, updated_at, deleted_at) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13, ?14) ON CONFLICT(id) DO UPDATE SET notebook_id=excluded.notebook_id, title=excluded.title, excerpt=excluded.excerpt, tags_json=excluded.tags_json, is_pinned=excluded.is_pinned, is_archived=excluded.is_archived, is_deleted=excluded.is_deleted, source_memo_ids=excluded.source_memo_ids, merge_source_count=excluded.merge_source_count, merged_into_memo_id=excluded.merged_into_memo_id, updated_at=excluded.updated_at, deleted_at=excluded.deleted_at", rusqlite::params![entity_id, notebook_id, memo.get("title").and_then(Value::as_str), string_param(memo, "excerpt")?, tags, memo.get("isPinned").and_then(Value::as_bool).unwrap_or(false) as i64, memo.get("isArchived").and_then(Value::as_bool).unwrap_or(false) as i64, memo.get("isDeleted").and_then(Value::as_bool).unwrap_or(false) as i64, source_ids, memo.get("mergeSourceCount").and_then(Value::as_i64).unwrap_or(0), merge_target, string_param(memo, "createdAt")?, string_param(memo, "updatedAt")?, memo.get("deletedAt").and_then(Value::as_str)]).map_err(|e| e.to_string())?;
-        tx.execute("INSERT INTO memo_contents (memo_id, content_json, content_markdown, content_text, content_hash, revision) VALUES (?1, ?2, ?3, ?4, ?5, ?6) ON CONFLICT(memo_id) DO UPDATE SET content_json=excluded.content_json, content_markdown=excluded.content_markdown, content_text=excluded.content_text, content_hash=excluded.content_hash, revision=excluded.revision, updated_at=strftime('%Y-%m-%dT%H:%M:%fZ','now')", rusqlite::params![entity_id, content_json.to_string(), string_param(memo, "contentMarkdown")?, string_param(memo, "contentText")?, string_param(memo, "contentHash")?, memo.get("revision").and_then(Value::as_i64).unwrap_or(0)]).map_err(|e| e.to_string())?;
-        for source_id in source_memo_ids.iter().filter_map(Value::as_str) {
-            tx.execute(
-                "UPDATE memos SET merged_into_memo_id = ?1 WHERE id = ?2",
-                rusqlite::params![entity_id, source_id],
-            )
-            .map_err(|e| e.to_string())?;
-        }
+    for index in ordered {
+        apply_one_sync_change(&tx, &changes[index], rebuilding)?;
     }
     tx.commit().map_err(|e| e.to_string())?;
     Ok(json!({ "applied": changes.len() }))
diff --git a/migrations/0046_restore_workspace_inbox_identity.sql b/migrations/0046_restore_workspace_inbox_identity.sql
new file mode 100644
index 00000000..50fe76b7
--- /dev/null
+++ b/migrations/0046_restore_workspace_inbox_identity.sql
@@ -0,0 +1,26 @@
+-- Keep a stable inbox identity per workspace. Renames must not change the
+-- inbox slug, and a previously deleted inbox should come back as the fallback
+-- destination for notes whose original notebook is gone.
+UPDATE notebooks
+SET
+  slug = 'inbox',
+  is_deleted = 0,
+  deleted_at = NULL,
+  parent_id = NULL,
+  updated_at = strftime('%Y-%m-%dT%H:%M:%fZ', 'now')
+WHERE (id = 'nb_inbox' OR id = workspace_id || '_inbox')
+  AND (
+    is_deleted = 1
+    OR IFNULL(slug, '') <> 'inbox'
+    OR parent_id IS NOT NULL
+  );
+
+INSERT INTO notebooks (id, workspace_id, parent_id, name, slug, icon, color, sort_order)
+SELECT w.id || '_inbox', w.id, NULL, '等待分类', 'inbox', 'notebook', '#0f766e', 10
+FROM workspaces w
+WHERE NOT EXISTS (
+  SELECT 1
+  FROM notebooks n
+  WHERE n.workspace_id = w.id
+    AND (n.id = 'nb_inbox' OR n.id = w.id || '_inbox')
+);
diff --git a/scripts/test-desktop-sidecar.mjs b/scripts/test-desktop-sidecar.mjs
index 413c169c..43e95ca8 100644
--- a/scripts/test-desktop-sidecar.mjs
+++ b/scripts/test-desktop-sidecar.mjs
@@ -41,12 +41,12 @@ assert.ok(seedInbox, "seed inbox notebook should exist");
 assert.deepEqual(await request("sync.bootstrap.prepare"), { clearedSeedData: true, rebuiltMirror: false });
 assert.equal((await request("memo.list", { limit: 20 })).totalCount, 0, "bootstrap preparation should remove only pristine seed data");
 assert.equal((await request("notebook.list")).notebooks.length, 0, "bootstrap preparation should remove pristine seed notebooks");
-const inbox = (await request("notebook.create", { name: "Inbox" })).notebook;
 if (process.platform !== "win32") {
   assert.equal(statSync(dataDir).mode & 0o777, 0o700, "sidecar data directory should be private");
   assert.equal(statSync(join(dataDir, "edgeever.sqlite")).mode & 0o777, 0o600, "sidecar database should be private");
 }
 
+let inbox;
 const remoteMemo = (id, {
   mergedIntoMemoId = null,
   sourceMemoIds = [],
@@ -76,6 +76,61 @@ const remoteMemo = (id, {
 const applyRemoteMemo = (memo) => request("sync.apply", {
   changes: [{ entityType: "memo", operation: "upsert", entityId: memo.id, memo, notebook: null }],
 });
+const notebookPayload = (id, { name = id, slug = id, parentId = null } = {}) => ({
+  id,
+  parentId,
+  name,
+  slug,
+  icon: "notebook",
+  color: "#0f766e",
+  sortOrder: 10,
+  createdAt: "2026-09-06T00:00:00.000Z",
+  updatedAt: "2026-09-06T00:00:00.000Z",
+});
+
+// Regression for #378: first pull after seed clear can receive memos before the
+// renamed workspace inbox, and must not fail when slug is no longer `inbox`.
+await request("sync.apply", {
+  changes: [
+    {
+      entityType: "memo",
+      operation: "upsert",
+      entityId: "memo_e2e_renamed_inbox",
+      memo: remoteMemo("memo_e2e_renamed_inbox", {
+        notebookId: "notebook_deleted_on_server",
+        isDeleted: true,
+      }),
+      notebook: null,
+    },
+    {
+      entityType: "notebook",
+      operation: "upsert",
+      entityId: "ws_1_inbox",
+      notebook: notebookPayload("ws_1_inbox", { name: "收集箱", slug: "shou-ji-xiang" }),
+      memo: null,
+    },
+  ],
+});
+inbox = (await request("notebook.list")).notebooks.find((notebook) => notebook.id === "ws_1_inbox");
+assert.ok(inbox, "sidecar should keep the workspace inbox even when its remote slug was renamed");
+assert.equal(inbox.slug, "inbox", "synced inbox identity should restore slug=inbox");
+assert.equal(
+  (await request("memo.get", { memoId: "memo_e2e_renamed_inbox", includeDeleted: true })).memo.notebookId,
+  inbox.id,
+  "a missing remote notebook should fall back to the workspace inbox in the same page",
+);
+assert.equal((await request("memo.emptyTrash")).deleted, 1, "renamed-inbox fixture should not leak into later scenarios");
+
+await applyRemoteMemo(remoteMemo("memo_e2e_recreated_inbox", {
+  notebookId: "notebook_also_missing",
+  isDeleted: true,
+}));
+assert.equal(
+  (await request("memo.get", { memoId: "memo_e2e_recreated_inbox", includeDeleted: true })).memo.notebookId,
+  inbox.id,
+  "later pulls should keep using the restored inbox",
+);
+assert.equal((await request("memo.emptyTrash")).deleted, 1, "recreated-inbox fixture should not leak into later scenarios");
 
 // Regression for #362: bootstrap memo pages are sorted by id, so a deleted
 // merge source can reach the real sidecar process before its merge target.
@@ -412,4 +467,4 @@ assert.equal((await request("sync.status")).conflict, 0);
 
 child.stdin.end();
 await new Promise((resolve) => child.once("close", resolve));
-console.log(JSON.stringify({ ok: true, checked: ["memo.create", "memo.list.search", "memo.list.tag", "memo.list.subtree", "memo.update", "memo.update.coalesce", "memo.revisions", "memo.restoreRevision", "memo.revision.cache", "tag.rename", "memo.moveBatch", "memo.pinBatch", "memo.deleteBatch", "memo.restore", "memo.emptyTrash", "memo.merge", "template.cache", "template.create.payload", "template.delete", "storage.backup", "storage.backups", "storage.restore", "sync.apply.merge-page-order", "sync.apply.deleted-notebook", "sync.outbox", "sync.outbox.retry", "sync.outbox.recoverMemoUpdate", "sync.outbox.discard"] }));
+console.log(JSON.stringify({ ok: true, checked: ["memo.create", "memo.list.search", "memo.list.tag", "memo.list.subtree", "memo.update", "memo.update.coalesce", "memo.revisions", "memo.restoreRevision", "memo.revision.cache", "tag.rename", "memo.moveBatch", "memo.pinBatch", "memo.deleteBatch", "memo.restore", "memo.emptyTrash", "memo.merge", "template.cache", "template.create.payload", "template.delete", "storage.backup", "storage.backups", "storage.restore", "sync.apply.merge-page-order", "sync.apply.deleted-notebook", "sync.apply.renamed-inbox", "sync.outbox", "sync.outbox.retry", "sync.outbox.recoverMemoUpdate", "sync.outbox.discard"] }));