修复: patch_file 小改动自动放行 + tool_result JSON 压缩 + prompt 项目路径

- C-260627: patch_file ≤5 行自动放行,不阻塞 AI 工作流
- tool_result 压缩: JSON 数组截断到 10 条 + _truncated 标记
- system_prompt: 项目清单增加「目录:」路径信息

src-tauri/src/commands/ai/audit/mod.rs

@@ -506,11 +506,19 @@ pub(crate) async fn process_tool_calls(
         //   low(默认):Low→auto, Med/High→审批(等价现状)
         //   medium:Low/Med→auto, High→审批
         //   all:全 auto(完全接管,无审批)
-        let should_auto = match risk_level {
+        let mut should_auto = match risk_level {
             RiskLevel::Low => true,
             RiskLevel::Medium => auto_exec_mode == "medium" || auto_exec_mode == "all",
             RiskLevel::High => auto_exec_mode == "all",
         };
+        // C-260627: patch_file 小改动(≤5 行)自动放行,不阻塞 AI 工作流
+        if !should_auto && draft.name == "patch_file" {
+            if let Some(text) = args.get("new_text").and_then(|v| v.as_str()) {
+                if text.lines().count() <= 5 {
+                    should_auto = true;
+                }
+            }
+        }
         if should_auto {
             low_risk.push((draft, args, risk_level));
         } else {