From 635262403e71e304e686596a2dced89584beb4c2 Mon Sep 17 00:00:00 2001
From: liubu <lvhxg6@gmail.com>
Date: Sat, 3 Jan 2026 23:44:00 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8D=E4=B8=AD=E6=96=87=20p?=
 =?UTF-8?q?rompt=20=E6=88=AA=E5=8F=96=E6=97=B6=E7=9A=84=20UTF-8=20?=
 =?UTF-8?q?=E5=AD=97=E7=AC=A6=E8=BE=B9=E7=95=8C=E9=97=AE=E9=A2=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

使用 .chars().take(50) 按字符数截取，而不是按字节索引，
避免切到中文字符中间导致 panic
---
 src-tauri/src/server/handlers/image_handler.rs | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/src-tauri/src/server/handlers/image_handler.rs b/src-tauri/src/server/handlers/image_handler.rs
index 6fd023018..6641fb1de 100644
--- a/src-tauri/src/server/handlers/image_handler.rs
+++ b/src-tauri/src/server/handlers/image_handler.rs
@@ -86,18 +86,18 @@ pub async fn handle_image_generation(
     }
 
     // 记录请求日志
+    // 安全截取 prompt，避免 UTF-8 字符边界问题
+    let prompt_preview: String = request.prompt.chars().take(50).collect();
+    let prompt_display = if request.prompt.chars().count() > 50 {
+        format!("{}...", prompt_preview)
+    } else {
+        request.prompt.clone()
+    };
     state.logs.write().await.add(
         "info",
         &format!(
             "[IMAGE] 收到图像生成请求: model={}, prompt={}, n={}, response_format={}",
-            request.model,
-            if request.prompt.len() > 50 {
-                format!("{}...", &request.prompt[..50])
-            } else {
-                request.prompt.clone()
-            },
-            request.n,
-            request.response_format
+            request.model, prompt_display, request.n, request.response_format
         ),
     );