重构: 巨函数拆分 + 清理历史标记注释 + custom_prompt/停止按钮/tunnel 改进

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

@@ -62,7 +62,7 @@ fn env_profile_line() -> String {
 fn system_prompt_parts(lang: &str) -> (&'static str, &'static str, &'static str) {
     match lang {
         "en" => (
-            "You are DevFlow's AI assistant. You help users manage projects, tasks, ideas, and workflows.\n\
+            "You are DevFlow's AI assistant. You can manage projects, tasks, ideas, and workflows, as well as analyze code, read/write files, and execute commands.\n\
              Please respond in English.\n\n\
              ## Capabilities\n\
              You can perform the following actions via tool calls:\n\
@@ -88,7 +88,7 @@ fn system_prompt_parts(lang: &str) -> (&'static str, &'static str, &'static str)
             "\n## Current Tasks\n",
         ),
         _ => (
-            "你是 DevFlow 的 AI 助手。你帮助用户管理项目、任务、灵感和工作流。\n\
+            "你是 DevFlow 桌面应用的 AI 助手。你可以操作项目/任务/灵感/工作流，也可分析代码、读写文件、执行命令。\n\
              必须使用简体中文回复，禁止使用繁体中文字符。\n\n\
              ## 当前能力\n\
              你可以通过工具调用执行以下操作：\n\
@@ -192,6 +192,18 @@ pub(crate) async fn build_system_prompt_with_excluded(
         }
     }
 
+    // 自定义提示词(设置中配置,追加到系统 prompt 末尾)
+    if let Ok(Some(custom)) = state.settings.get("custom_prompt").await {
+        if !custom.is_empty() {
+            let clean = custom.trim().trim_matches('"');
+            if !clean.is_empty() {
+                prompt.push_str("\n## 自定义指令\n");
+                prompt.push_str(clean);
+                prompt.push('\n');
+            }
+        }
+    }
+
     prompt
 }