修复: 协议层与体验缺陷六件

- temperature 按模型适配,仅收 1 的模型不再 400
- 流式 error 帧不再被 choices 必填整帧丢弃
- 只读缓存写后失效
- git diff 中文截断撞 UTF-8 边界 panic
- 非视觉模型纯图片直接拒绝
- 全局快捷键补输入焦点守卫

src-tauri/Cargo.toml

@@ -39,6 +39,9 @@ async-trait = { workspace = true }
 # 零新依赖树)。rust-work 改代理端口只改网关映射表,工具代码不感知端口。
 axum = { version = "0.7" }
 
+# 托盘菜单 i18n:系统 locale 判定(零传递依赖,判定一次缓存)
+sys-locale = "0.3"
+
 # 后端 crate
 df-types = { path = "../crates/df-types" }
 df-storage = { path = "../crates/df-storage" }

src-tauri/src/commands/ai/remote_bridge.rs

@@ -51,7 +51,7 @@
 
 use serde::Deserialize;
 use serde_json::Value;
-use tauri::{AppHandle, Emitter, State};
+use tauri::{AppHandle, State};
 
 use crate::state::AppState;
 

src-tauri/src/commands/ai/stream_recv.rs

@@ -102,6 +102,9 @@ pub(crate) enum StreamResult {
         usage: df_ai::provider::TokenUsage,
         /// DeepSeek thinking 模式推理内容（需回传到下一轮请求）
         reasoning_content: Option<String>,
+        /// 流因 provider max_tokens 上限截断(finish_reason=length / stop_reason=max_tokens)。
+        /// true=文本/tool_calls 可能不完整,调用方据此标记该轮产出截断,不冒充正常完成。
+        truncated_by_max_tokens: bool,
     },
     /// 流中途断（MidStream chunk Err / idle timeout / provider stream-error / 有 partial_text
     /// 但流尽未收到 finished）。已 emit 过 AiTextDelta（前端 currentText 已累积），
@@ -282,6 +285,9 @@ pub(crate) async fn stream_llm(
     let mut finished_received = false;
     let mut stopped = false;
     let mut final_usage: Option<df_ai::provider::TokenUsage> = None;
+    // max_tokens 截断标志跨帧 OR 累积(openai finish_reason=length / anthropic
+    // stop_reason=max_tokens 的帧先于终态帧到达),Complete 随旗标带出供上层标记截断。
+    let mut truncated_by_max_tokens = false;
     // DeepSeek thinking 模式推理内容累积（多轮需回传）
     let mut reasoning_content_acc: Option<String> = None;
     // per-conv delta 合批累加器。pending_delta 累积未 flush 的文本,
@@ -419,6 +425,9 @@ pub(crate) async fn stream_llm(
                         if let Some(u) = &chunk.usage {
                             final_usage = Some(u.clone());
                         }
+                        if chunk.truncated_by_max_tokens {
+                            truncated_by_max_tokens = true;
+                        }
                         if let Some(ref rc) = chunk.reasoning_content {
                             reasoning_content_acc.get_or_insert_with(String::new).push_str(rc);
                         }
@@ -540,6 +549,7 @@ pub(crate) async fn stream_llm(
             tool_calls: tool_calls_acc,
             usage: final_usage.unwrap_or_default(),
             reasoning_content: reasoning_content_acc,
+            truncated_by_max_tokens,
         };
     }
 
@@ -573,6 +583,7 @@ pub(crate) async fn stream_llm(
         tool_calls: tool_calls_acc,
         usage: final_usage.unwrap_or_default(),
         reasoning_content: reasoning_content_acc,
+        truncated_by_max_tokens,
     }
 }
 

src-tauri/src/commands/ai/tools/git.rs

@@ -156,9 +156,13 @@ async fn run_git_diff(working_dir: &str, staged: bool) -> serde_json::Value {
     let mut patch_args = vec!["diff"];
     if staged { patch_args.push("--cached"); }
     let patch_raw = exec_git_exit(working_dir, &patch_args).await.0;
-    // 截断到 8000 字符(防大体量 diff)
+    // 截断到 8000 字符(防大体量 diff);中文字节切片撞 UTF-8 边界会 panic,回退到字符边界
     let patch_truncated = if patch_raw.len() > 8000 {
-        format!("{}\n... (diff 截断,共 {} 字符)", &patch_raw[..8000], patch_raw.len())
+        let mut end = 8000;
+        while !patch_raw.is_char_boundary(end) {
+            end -= 1;
+        }
+        format!("{}\n... (diff 截断,共 {} 字符)", &patch_raw[..end], patch_raw.len())
     } else {
         patch_raw
     };

src-tauri/src/commands/idea.rs

@@ -313,7 +313,8 @@ pub async fn evaluate_idea(
 ///
 /// - 成功的灵感返回更新后的记录，失败的灵感记录错误信息，不中断后续评估。
 /// - provider 构造仅一次（批量场景减少重复初始化开销）。
-/// - 返回 BatchEvalResult { success, errors }，前端据此展示部分成功/失败。
+// 2026-10-04: 未在 lib.rs 注册 IPC(dead_code),保留作批量评估参考实现;复用下方 evaluate_single 共用内部函数。
+#[allow(dead_code)]
 #[tauri::command]
 pub async fn evaluate_ideas_batch(
     state: State<'_, AppState>,

src-tauri/src/tray.rs

@@ -4,6 +4,9 @@
 //! - 托盘菜单「显示主窗口」唤起 / 「退出」app.exit(0) 真正结束
 //! - TrayHandle 经 app.manage 保活,防托盘图标被 GC 移除
 //! - P1 bg 化:运行态菜单项 + tooltip 随 ConvState 迁移刷新(guard.transition 挂钩 update_tray_runtime)
+//! - i18n:文案按系统 locale 取中/英双语静态映射(locale 判定一次缓存),无 Rust i18n 机制的最小实现
+use std::sync::OnceLock;
+
 use tauri::{
     AppHandle, Manager,
     menu::{Menu, MenuItem},
@@ -12,6 +15,45 @@ use tauri::{
 
 use crate::state::AppState;
 
+/// 托盘文案双语映射(系统 locale 判定一次,进程内缓存;判定失败回退中文——应用主语言)。
+/// 菜单项与运行态文本分两处消费,映射同源防两处漂移。
+struct TrayTexts {
+    status_idle: &'static str,
+    status_running: &'static str,
+    show: &'static str,
+    quit: &'static str,
+    tooltip_running: &'static str,
+}
+
+/// 按系统 locale 取托盘文案(判定一次缓存)。zh* → 中文,其余(含判定失败)→ 中文/英文
+/// 各取其一:locale 明确非 zh 用英文,判定失败(None)回退中文(应用主语言)。
+fn tray_texts() -> &'static TrayTexts {
+    static TEXTS: OnceLock<TrayTexts> = OnceLock::new();
+    TEXTS.get_or_init(|| {
+        let zh = sys_locale::get_locale()
+            .map(|l| l.to_ascii_lowercase().starts_with("zh"))
+            // None = 系统locale不可得,回退中文(应用默认语言),与首次安装体验一致
+            .unwrap_or(true);
+        if zh {
+            TrayTexts {
+                status_idle: "无运行中会话",
+                status_running: "运行中 {} 个会话",
+                show: "显示主窗口",
+                quit: "退出",
+                tooltip_running: "DevFlow (运行中 {} 个会话)",
+            }
+        } else {
+            TrayTexts {
+                status_idle: "No running sessions",
+                status_running: "{} session(s) running",
+                show: "Show Main Window",
+                quit: "Quit",
+                tooltip_running: "DevFlow ({} session(s) running)",
+            }
+        }
+    })
+}
+
 /// managed state 保活，防 GC 移除托盘图标。
 /// tray 持 TrayIcon 本体(保活为主,update_tray_runtime 借用刷 tooltip);
 /// status 为运行态纯展示项句柄,供 update_tray_runtime 刷文本。
@@ -24,10 +66,11 @@ pub struct TrayHandle {
 
 /// 创建托盘:图标 + 菜单(运行态/显示主窗口/退出)。
 pub fn setup_tray(app: &AppHandle) -> tauri::Result<()> {
+    let t = tray_texts();
     // 运行态纯展示项:enabled=false 置灰不响应点击,文本由 update_tray_runtime 维护
-    let status = MenuItem::with_id(app, "status", "无运行中会话", false, None::<&str>)?;
-    let show = MenuItem::with_id(app, "show", "显示主窗口", true, None::<&str>)?;
-    let quit = MenuItem::with_id(app, "quit", "退出", true, None::<&str>)?;
+    let status = MenuItem::with_id(app, "status", t.status_idle, false, None::<&str>)?;
+    let show = MenuItem::with_id(app, "show", t.show, true, None::<&str>)?;
+    let quit = MenuItem::with_id(app, "quit", t.quit, true, None::<&str>)?;
     let menu = Menu::with_items(app, &[&status, &show, &quit])?;
     // 复用窗口图标(tauri.conf.json bundle.icon 已配置),缺则 panic 提示配置
     let icon = app
@@ -60,14 +103,15 @@ pub fn update_tray_runtime(app: &AppHandle) {
     else {
         return;
     };
+    let t = tray_texts();
     let n = state.conv_states.active_convs().len();
     let text = if n > 0 {
-        format!("运行中 {} 个会话", n)
+        t.status_running.replace("{}", &n.to_string())
     } else {
-        "无运行中会话".to_string()
+        t.status_idle.to_string()
     };
     let tooltip = if n > 0 {
-        format!("DevFlow (运行中 {} 个会话)", n)
+        t.tooltip_running.replace("{}", &n.to_string())
     } else {
         "DevFlow (MCP server running)".to_string()
     };