Add line number extraction for error explanation

Author: Nikitaa104

src/main/java/io/jenkins/plugins/explain_error/ErrorExplainer.java

@@ -70,11 +70,17 @@ private String extractErrorLogs(Run<?, ?> run, String logPattern, int maxLines)
         Pattern pattern = Pattern.compile(logPattern, Pattern.CASE_INSENSITIVE);
         StringBuilder errorLogs = new StringBuilder();
 
-        for (String line : logLines) {
-            if (pattern.matcher(line).find()) {
-                errorLogs.append(line).append("\n");
-            }
-        }
+for (int i = 0; i < logLines.size(); i++) {
+    String line = logLines.get(i);
+
+    if (pattern.matcher(line).find()) {
+        int lineNumber = i + 1; // 1 indexing
+        System.out.println("Matched error at line: " + lineNumber);
+
+        errorLogs.append("[Line ").append(lineNumber).append("] ")
+                .append(line).append("\n");
+    }
+}
 
         return errorLogs.toString();
     }

src/main/resources/index.jelly

@@ -1,4 +1,29 @@
 <?jelly escape-by-default='true'?>
-<div>
-    AI-powered Jenkins plugin that explains pipeline and job failures with human-readable insights.
-</div>
+<j:jelly xmlns:j="jelly:core" xmlns:l="/lib/layout">
+
+<l:layout title="AI Error Explanation">
+    <l:main-panel>
+
+        <h2>AI Error Explanation</h2>
+
+        <p><b>Provider:</b> ${it.providerName}</p>
+        <p><b>Generated at:</b> ${it.formattedTimestamp}</p>
+
+        <h3>Explanation</h3>
+        <pre style="background:#f5f5f5; padding:12px; border-radius:6px;">
+${it.explanation}
+        </pre>
+
+        <h3>Relevant Error Logs</h3>
+
+        <pre style="background:#272822; color:#f8f8f2; padding:12px; border-radius:6px; white-space:pre-wrap;">
+<j:forEach var="line" items="${it.originalErrorLogs.split('\n')}">
+${loop.index + 1}: ${line}
+</j:forEach>
+        </pre>
+
+    </l:main-panel>
+</l:layout>
+
+</j:jelly>
+