refactor: improve comment formatting and streamline AI handling in findings processing

app/gitea.js

@@ -12,9 +12,8 @@ export async function getPRDiff() {
 }
 
 function filterDiff(diff, excludePrefixes) {
-  const blocks = diff.split(/(?=^diff --git )/m);
-  return blocks
-    .filter(block => !excludePrefixes.some(prefix => block.match(new RegExp(`^diff --git a/${prefix.replace(/\//g, '\\/')}`)))) 
+  return diff.split(/(?=^diff --git )/m)
+    .filter(block => !excludePrefixes.some(p => block.startsWith(`diff --git a/${p}`)))
     .join('');
 }