diff --git a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/persistence.rs b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/persistence.rs
index efb9e8dae..9f39a8114 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/persistence.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/persistence.rs
@@ -118,7 +118,7 @@ pub(crate) fn save_ui_design_state_at(
         return Err("UI 设计资源在保存锁获取期间发生变化，请重试".to_string());
     }
     let current =
-        read_ui_design_document(root, &asset.local_path, &expected_project_id, &asset_id)?;
+        read_ui_design_document_locked(root, &asset.local_path, &expected_project_id, &asset_id)?;
     validate_document(&current, &expected_project_id, &asset_id)?;
     if current.revision != input.expected_revision {
         return Ok(SaveUiDesignStateResult::Conflict {
@@ -152,7 +152,7 @@ pub(crate) fn save_ui_design_state_at(
     validate_document(&next, &expected_project_id, &asset_id)?;
     write_ui_design_document(root, &asset.local_path, &next)?;
     let installed =
-        read_ui_design_document(root, &asset.local_path, &expected_project_id, &asset_id)?;
+        read_ui_design_document_locked(root, &asset.local_path, &expected_project_id, &asset_id)?;
     validate_document(&installed, &expected_project_id, &asset_id)?;
     if installed != next {
         return Err("UI 设计 State 安装后回读与待写内容不一致".to_string());
@@ -221,25 +221,47 @@ fn read_ui_design_document(
     asset_id: &str,
 ) -> Result<PersistedUiDesignState, String> {
     let primary_path = resolve_local_project_path(root, relative_path)?;
-    let backup_path = agent_runtime_json_sidecar_backup_path(&primary_path);
-    let read_candidate = |path: &Path| {
-        read_ui_design_document_path(path).and_then(|document| {
-            validate_document(&document, project_id, asset_id)?;
-            Ok(document)
-        })
-    };
-    match read_candidate(&primary_path) {
+    match read_valid_ui_design_document_path(&primary_path, project_id, asset_id) {
         Ok(document) => Ok(document),
-        Err(primary_error) => match read_candidate(&backup_path) {
-            Ok(document) => {
-                write_ui_design_document(root, relative_path, &document)?;
-                Ok(document)
-            }
-            Err(_) => Err(primary_error),
-        },
+        Err(_) => {
+            let _lock = acquire_project_write_lock(root, "ui_design.state_recover")?;
+            read_ui_design_document_locked(root, relative_path, project_id, asset_id)
+        }
     }
 }
 
+fn read_ui_design_document_locked(
+    root: &Path,
+    relative_path: &str,
+    project_id: &str,
+    asset_id: &str,
+) -> Result<PersistedUiDesignState, String> {
+    let primary_path = resolve_local_project_path(root, relative_path)?;
+    let backup_path = agent_runtime_json_sidecar_backup_path(&primary_path);
+    match read_valid_ui_design_document_path(&primary_path, project_id, asset_id) {
+        Ok(document) => Ok(document),
+        Err(primary_error) => {
+            match read_valid_ui_design_document_path(&backup_path, project_id, asset_id) {
+                Ok(document) => {
+                    write_ui_design_document(root, relative_path, &document)?;
+                    Ok(document)
+                }
+                Err(_) => Err(primary_error),
+            }
+        }
+    }
+}
+
+fn read_valid_ui_design_document_path(
+    path: &Path,
+    project_id: &str,
+    asset_id: &str,
+) -> Result<PersistedUiDesignState, String> {
+    let document = read_ui_design_document_path(path)?;
+    validate_document(&document, project_id, asset_id)?;
+    Ok(document)
+}
+
 fn read_ui_design_document_path(path: &Path) -> Result<PersistedUiDesignState, String> {
     let (mut file, metadata) = open_project_snapshot_regular_file(path, "UI 设计 State")?;
     if metadata.len() > UI_DESIGN_STATE_MAX_BYTES as u64 {
@@ -681,6 +703,43 @@ mod tests {
         );
     }
 
+    #[test]
+    fn recovery_install_respects_the_project_write_lock() {
+        let (directory, asset_id) = fixture();
+        let first = state_with_unavailable_image("assets/first-missing.png");
+        let second = state_with_unavailable_image("assets/second-missing.png");
+        save_ui_design_state_at(input(directory.path(), &asset_id, 0, first.clone()))
+            .expect("save first state");
+        save_ui_design_state_at(input(directory.path(), &asset_id, 1, second))
+            .expect("save second state");
+
+        let asset = ui_design_asset(directory.path(), PROJECT_ID, &asset_id).expect("find asset");
+        let primary = resolve_local_project_path(directory.path(), &asset.local_path)
+            .expect("resolve primary");
+        fs::write(&primary, b"{broken").expect("corrupt primary");
+
+        let project_lock = acquire_project_write_lock(directory.path(), "test.concurrent-save")
+            .expect("hold project write lock");
+        let error = load_ui_design_state_at(LoadUiDesignStateInput {
+            project_path: directory.path().to_string_lossy().into_owned(),
+            expected_project_id: PROJECT_ID.to_string(),
+            asset_id: asset_id.clone(),
+        })
+        .expect_err("recovery must not install while another writer holds the lock");
+        assert!(error.contains("项目正在被其他写操作占用"));
+        assert!(read_ui_design_document_path(&primary).is_err());
+        drop(project_lock);
+
+        let recovered = load_ui_design_state_at(LoadUiDesignStateInput {
+            project_path: directory.path().to_string_lossy().into_owned(),
+            expected_project_id: PROJECT_ID.to_string(),
+            asset_id,
+        })
+        .expect("recover after project lock is released");
+        assert_eq!(recovered.revision, 1);
+        assert_eq!(recovered.state, first);
+    }
+
     #[test]
     fn rejects_legacy_empty_object_and_unknown_envelope_fields() {
         let (directory, asset_id) = fixture();
diff --git a/docs/technical/【技术方案】AI游戏创作智能体App实施计划-2026-06-24.md b/docs/technical/【技术方案】AI游戏创作智能体App实施计划-2026-06-24.md
index 215e8fdd2..9ed60b9fa 100644
--- a/docs/technical/【技术方案】AI游戏创作智能体App实施计划-2026-06-24.md
+++ b/docs/technical/【技术方案】AI游戏创作智能体App实施计划-2026-06-24.md
@@ -1078,5 +1078,5 @@ game-project/
 
 - UI 编辑器复用现有 manifest `kind: "UI"`、`mediaType: "application/json"` 资源，不增加平行 asset kind。资源文件固定为严格 `game-creator-ui-design-state.v1` JSON envelope：`projectId`、`assetId`、每资源 `revision` 和 Rust 唯一源 `State`；旧空对象、未知字段、身份错配、超限、无效内部引用和不安全相对路径均失败关闭。
 - Tauri 专用 load/save command 只接受项目路径、期望项目 ID、manifest asset ID 和（保存时）资源 revision；Rust 按 manifest 解析受控本地路径并在项目写锁内做 CAS。相同 `State` 返回 unchanged 且不推进 project revision；不同内容安装并回读一致后才推进 revision，后续推进失败返回 `reconciliation-required`，不伪装为完整保存。
-- UI State 原子安装保留最近一个有效 `.previous` 恢复副本。主文件损坏时仅在恢复副本通过同一严格校验后恢复；任一候选均不可信则停在加载错误，前端禁编辑和保存。新建 UI 资源先登记并安装合法 envelope，任一步失败补偿 manifest/文件，避免把空 JSON 留给资源卡。
+- UI State 原子安装保留最近一个有效 `.previous` 恢复副本。主文件损坏时仅在恢复副本通过同一严格校验后恢复；恢复安装与保存共用项目写锁，并在持锁后重新读取主文件，已有并发保存的有效新版本时直接返回而不安装旧副本。任一候选均不可信则停在加载错误，前端禁编辑和保存。新建 UI 资源先登记并安装合法 envelope，任一步失败补偿 manifest/文件，避免把空 JSON 留给资源卡。
 - 图片路径只需是安全项目相对路径，不要求外部图片仍存在或已登记为 manifest asset；缺失媒体只导致 preview 占位。`imageOrder`、当前选择、缩放、面板开关和 preview URL 不写入 State，加载后由 State 派生。保存冻结提交快照，保存期间的新编辑继续保持 dirty；AI state lock 和加载期间禁保存。