test(留言分頁): 改用 timeline 分頁讀取留言

Gitea 議題留言端點無法可靠處理分頁；改由 timeline 逐頁篩選 comment 事件並去重，讓抽取、整併與 PR 留言流程取得完整集合。

test/pr-watch.test.js

@@ -44,12 +44,16 @@ function routes({ state = 'open', merged = false, draft = false, general = [], h
         head: head ?? { ref: BRANCH, label: BRANCH },
       },
     },
-    [`GET /api/v1/repos/${REPO}/issues/${INDEX}/comments`]: {
+    [`GET /api/v1/repos/${REPO}/issues/${INDEX}/timeline`]: {
       status: 200,
-      body: general.map((c, i) => ({ id: 100 + i, body: c.body, user: { login: 'reviewer' } })),
+      body: general.map((c, i) => ({
+        id: 100 + i,
+        type: 'comment',
+        body: c.body,
+        user: { login: 'reviewer' },
+      })),
     },
     [`GET /api/v1/repos/${REPO}/pulls/${INDEX}/reviews`]: { status: 200, body: [] },
-    [`GET /api/v1/repos/${REPO}/issues/${INDEX}/timeline`]: { status: 200, body: [] },
   });
   general.forEach((c, i) => {
     base[`GET /api/v1/repos/${REPO}/issues/comments/${100 + i}/reactions`] = {