From 12fbb61fada325747dd132c3880a6cd7e51f1b0b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=8E=8B=E5=BE=B7=E5=AE=87?= <kvtodev@outlook.com>
Date: Sat, 12 Sep 2026 02:17:55 +0800
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写盘前校验与读取一致的八兆字节上限

超限时记录原因并拒绝不可恢复检查点
---
 .../src/ui_editor/commands/separation/persistence.rs  | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/separation/persistence.rs b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/separation/persistence.rs
index 5b663c609..a2f0728c4 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/separation/persistence.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/commands/separation/persistence.rs
@@ -66,6 +66,17 @@ fn write_separation_state_blocking(path: &Path, state: &SeparationState) -> Resu
         app_log!("ui_separation.error stage=state_write reason=serialize error={error}");
         format!("序列化 separation state 失败：{error}")
     })?;
+    if bytes.len() > SEPARATION_STATE_MAX_BYTES {
+        app_log!(
+            "ui_separation.error stage=state_write reason=too_large bytes={} max_bytes={}",
+            bytes.len(),
+            SEPARATION_STATE_MAX_BYTES
+        );
+        return Err(format!(
+            "separation state 超过 {} 字节上限",
+            SEPARATION_STATE_MAX_BYTES
+        ));
+    }
     let parent = path.parent().ok_or_else(|| {
         app_log!("ui_separation.error stage=state_write reason=missing_parent");
         "separation state 路径缺少父目录".to_string()