fix(llm): relax guidance and preserve judge output

web/reinfo.php

@@ -124,71 +124,18 @@ function dedup_runtimeinfo($text, &$dedup_count) {
  * 返回 [['name' => 'test1.out', 'expected' => [...], 'yours' => [...], 'full_mode' => bool], ...]
  * 解析失败返回空数组
  */
-function parse_diff_blocks($text) {
-  $blocks = array();
-  if (empty($text)) return $blocks;
-
-  // 先按 "\n\n" 切分（simple mode 每个测试点之间有空行）
-  $chunks = preg_split('/\n\s*\n/', $text);
-  foreach ($chunks as $chunk) {
-    if (trim($chunk) === '') continue;
-    $chunk = trim($chunk, "\r\n");
-
-    // 格式 1: 整段就是一个 =====[name]===== 块（包含表头+数据+结尾 ====）
-    // 形如 "========[test1.out]========\nExpected     | Yours\nFail | Fall\n=============================="
-    if (preg_match('/^=+\[([^\]]+)\]\=+(.+?)\n=+\s*$/s', $chunk, $m)) {
-      $name = trim($m[1]);
-      $body = $m[2];
-      if (llm_guidance_testcase_base($name) === null) continue;
-      // OJ_FULL_DIFF also contains hidden test input. It is never interpreted
-      // as an Expected/Yours block; normal users fall back to focused guidance.
-      if (llm_guidance_has_full_diff_sections($chunk)) continue;
-      // body 形如 "\nExpected     | Yours\nFail | Fall"
-      // 去掉首尾的换行符
-      $body = trim($body, "\n\r");
-      $rows = llm_guidance_parse_diff_rows($body);
-      $expected = $rows['expected'];
-      $yours = $rows['yours'];
-      if (!empty($expected)) {
-        $blocks[] = array(
-          'name' => $name,
-          'expected' => $expected,
-          'yours'    => $yours,
-          'full_mode' => true,
-        );
-      }
-      continue;
-    }
-
-    // 格式 2: simple mode "test1.out\n--\n|Expected|Yours\n|--|--\n|row1|row2"
-    if (preg_match('/^([^\n=|]+)\n--\n([\s\S]+)$/', $chunk, $m)) {
-      $name = trim($m[1]);
-      $body = $m[2];
-      if (llm_guidance_testcase_base($name) === null) continue;
-      $rows = llm_guidance_parse_diff_rows($body);
-      $expected = $rows['expected'];
-      $yours = $rows['yours'];
-      if (!empty($expected)) {
-        $blocks[] = array(
-          'name' => $name,
-          'expected' => $expected,
-          'yours'    => $yours,
-          'full_mode' => false,
-        );
-      }
-    }
-  }
-  return $blocks;
-}
+function parse_diff_blocks($text) {
+  return llm_guidance_parse_diff_blocks($text);
+}
 
 $is_compile_error = intval($row['result']) == 11;
 $view_reinfo = "";
 $view_reinfo_raw = "";     // 原始（管理员/有权限者看）
 $view_reinfo_summary = ""; // 折叠后（普通用户看）
-$view_reinfo_dedup_count = 0; // 折叠掉的测试点数
-$verdict_color_class = "blue"; // semantic ui color: green/red/orange/yellow/grey
-$result_icon = "info circle";
-$verdict_tip = "";
+$view_reinfo_dedup_count = 0; // 折叠掉的测试点数
+$verdict_color_class = "blue"; // semantic ui color: green/red/orange/yellow/grey
+$result_icon = "info circle";
+$verdict_tip = "";
 
 if($ok){
 
@@ -292,11 +239,11 @@ if($ok){
   $show_raw = $is_admin_session || $is_source_browser;
   $unsafe_full_diff = llm_guidance_has_full_diff_sections($raw_error);
 
-  // 尝试解析为结构化的 diff 数据（用于高完成度 WA/PE 的对比展示）。
-  // Full diff 同时携带隐藏输入，普通页面不解析也不回显。
+  // 结构化 diff 是原评测器输出的一个视图，不受 AI 完成度策略控制。
+  // Full diff 的原文仍按原有 OJ_SHOW_DIFF/权限规则展示，但不会被二次解析。
   $diff_blocks = $unsafe_full_diff ? array() : parse_diff_blocks($raw_error);
 
-  // 完成度只使用学生自己的源码和判题统计；不查询参考答案。
+  // AI 完成度只决定辅导方式，不修改评测器原文、diff 或下载权限。
   $source_result = pdo_query("SELECT `source` FROM `source_code_user` WHERE `solution_id`=?", $id);
   $student_source = (!empty($source_result) && $source_result !== -1)
     ? $source_result[0]['source']
@@ -308,27 +255,23 @@ if($ok){
     llm_guidance_output_attempt($unsafe_full_diff ? '' : $raw_error)
   );
   if ($llm_guidance['show_output_diff'] && empty($diff_blocks)) {
-    $llm_guidance['mode'] = 'focused_hint';
+    $llm_guidance['mode'] = 'judge_output';
     $llm_guidance['show_output_diff'] = false;
   }
   $llm_guidance_auto_fetch = true;
 
-  // 管理员或 source_browser 永远看完整原文。普通学生的 WA/PE
-  // 只看经过策略授权的结构化 diff，不再从原始折叠区旁路读取。
-  if (!$show_raw && ($result_code === 5 || $result_code === 6)) {
-    if ($llm_guidance['show_output_diff'] && !empty($diff_blocks)) {
-      $view_reinfo_summary = "已在下方显示本次错误测试点的结构化输出差异。";
-    } else {
-      // 低/中完成度不能通过重复白卷提交套取隐藏测试点答案。
-      $diff_blocks = array();
-      $view_reinfo_summary = "当前提交完成度不足，暂不显示隐藏测试点的期望输出。请先补齐程序，再重新提交。";
-    }
-  }
   if ($show_raw) {
     $view_reinfo = $view_reinfo_raw;
+  } elseif ($unsafe_full_diff) {
+    // Full mode includes hidden testcase input/expected output. Preserve the
+    // judge structure and the student's output, but redact protected data.
+    $view_reinfo = llm_guidance_redact_full_diff($view_reinfo_raw);
   } else {
-    $view_reinfo = $view_reinfo_summary;
+    // AI guidance is additive: ordinary judge/compiler/runtime text remains
+    // byte-for-byte visible instead of being replaced by an AI policy message.
+    $view_reinfo = $view_reinfo_raw;
   }
+  $view_reinfo_dedup_count = 0;
   $llm_guidance_has_output_diff = !empty($diff_blocks);
   $is_owner_session = isset($_SESSION[$OJ_NAME.'_'.'user_id'])
     && strval($row['user_id']) === strval($_SESSION[$OJ_NAME.'_'.'user_id']);
@@ -336,12 +279,12 @@ if($ok){
     && intval($spj[0][0]) === 2
     && !empty($OJ_HIDE_RIGHT_ANSWER);
   $download_diff_enabled = !isset($OJ_SHOW_DIFF) || $OJ_SHOW_DIFF;
-  $llm_guidance_download_allowed = $is_admin_session
+  $testcase_download_allowed = $is_admin_session
     || ($is_owner_session
       && $download_diff_enabled
       && !$download_hidden_spj
       && !$unsafe_full_diff
-      && !empty($llm_guidance['show_output_diff']));
+      && ($result_code === 5 || $result_code === 6));
 }
 
 // 不是本人的提交，且不是 source_browser