feat(ui): 대시보드 페이지당 저장소 10개로 조정

PAGE_SIZE 20 → 10. 한 화면에 부담 없이 보이도록. 페이저는 기존대로
동적 계산(ceil(total/PAGE_SIZE)). 테스트도 10/페이지 기준으로 갱신.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/routes/dashboard.py

@@ -23,7 +23,7 @@ from ..pulp_client import PulpClient
 
 router = APIRouter()
 
-PAGE_SIZE = 20
+PAGE_SIZE = 10
 
 
 def _load_repos(

tests/test_dashboard.py

@@ -133,10 +133,11 @@ def test_repos_table_paginates():
     page1 = client.get(
         "/repos/table", params={"sort": "name", "dir": "asc", "page": 1}
     ).text
-    page2 = client.get(
-        "/repos/table", params={"sort": "name", "dir": "asc", "page": 2}
+    page3 = client.get(
+        "/repos/table", params={"sort": "name", "dir": "asc", "page": 3}
     ).text
-    assert "repo-01" in page1 and "repo-20" in page1
-    assert "repo-21" not in page1
-    assert "repo-21" in page2 and "repo-25" in page2
-    assert "1 / 2" in page1
+    # PAGE_SIZE=10 → 25개는 3페이지 (10/10/5)
+    assert "repo-01" in page1 and "repo-10" in page1
+    assert "repo-11" not in page1
+    assert "repo-21" in page3 and "repo-25" in page3
+    assert "1 / 3" in page1