fix(config): comment token 缺省時回退至 token

src/config.js

@@ -30,7 +30,7 @@ const PR = EVENT.pull_request || {};
 // 無對應輸入的欄位（server url / repository / PR_*）則走專用 env → runner 內建 / 事件 payload。
 // 使用端 workflow 只需傳 `with: token`。
 export const GITEA_TOKEN = process.env.INPUT_TOKEN || process.env.GITEA_TOKEN || '';
-export const GITEA_COMMENT_TOKEN = process.env.INPUT_COMMENT_TOKEN || process.env.GITEA_COMMENT_TOKEN || '';
+export const GITEA_COMMENT_TOKEN = process.env.INPUT_COMMENT_TOKEN || process.env.GITEA_COMMENT_TOKEN || process.env.INPUT_TOKEN || process.env.GITEA_TOKEN || '';
 export const GITEA_SERVER_URL = process.env.GITEA_SERVER_URL || process.env.GITHUB_SERVER_URL || 'https://gitea.com';
 export const GITEA_REPOSITORY = process.env.GITEA_REPOSITORY || process.env.GITHUB_REPOSITORY || '';
 export const PR_NUMBER = process.env.PR_NUMBER || (PR.number != null ? String(PR.number) : '');