agent: implement issue #3 - Enhancement: 检查现有的代码框架，确认是否需要优化

src/agent_gitea/gitea.py

@@ -85,25 +85,34 @@ class GiteaClient:
         return repositories
 
     def list_open_issues(self, owner: str, name: str) -> list[GiteaIssue]:
-        response = self.client.get(
-            f"/repos/{owner}/{name}/issues",
-            params={"state": "open", "type": "issues", "limit": 50},
-        )
-        response.raise_for_status()
         issues: list[GiteaIssue] = []
-        for item in response.json():
-            if item.get("pull_request"):
-                continue
-            issues.append(
-                GiteaIssue(
-                    number=int(item["number"]),
-                    title=item.get("title") or "",
-                    body=item.get("body") or "",
-                    labels=labels_from_gitea(item.get("labels")),
-                    state=item.get("state") or "open",
-                    html_url=item.get("html_url") or item.get("url") or "",
-                )
+        page = 1
+        limit = 50
+        while True:
+            response = self.client.get(
+                f"/repos/{owner}/{name}/issues",
+                params={"state": "open", "type": "issues", "page": page, "limit": limit},
             )
+            response.raise_for_status()
+            payload = response.json()
+            if not payload:
+                break
+            for item in payload:
+                if item.get("pull_request"):
+                    continue
+                issues.append(
+                    GiteaIssue(
+                        number=int(item["number"]),
+                        title=item.get("title") or "",
+                        body=item.get("body") or "",
+                        labels=labels_from_gitea(item.get("labels")),
+                        state=item.get("state") or "open",
+                        html_url=item.get("html_url") or item.get("url") or "",
+                    )
+                )
+            if len(payload) < limit:
+                break
+            page += 1
         return issues
 
     def create_pull_request(