refactor: update TODO stages to reflect current status and improve clarity; modify diff filtering logic in gitea.js and main.js

app/gitea.js

@@ -8,14 +8,14 @@ const api = (path) => `${GITEA_SERVER_URL.replace(/\/$/, '')}/api/v1${path}`;
 
 export async function getPRDiff() {
   const resp = await axios.get(api(`/repos/${GITEA_REPOSITORY}/pulls/${PR_NUMBER}.diff`), { headers: headers(), timeout: 60000, httpsAgent });
-  return filterDiff(resp.data, ['.gitea/']);
+  return resp.data;
 }
 
 /**
  * 過濾 diff 內容，移除路徑符合 excludePrefixes 的區塊。
  * 每個區塊以 "diff --git a/<prefix>" 開頭判斷，使用 startsWith 精確比對前綴。
  */
-function filterDiff(diff, excludePrefixes) {
+export function filterDiff(diff, excludePrefixes) {
   return diff.split(/(?=^diff --git )/m)
     .filter(block => !excludePrefixes.some(p => block.startsWith(`diff --git a/${p}`)))
     .join('');