style: mono data font, compact actions, polish, favicon; slow status poll to 30s

- JetBrains Mono(로컬 동봉) → 저장소명/버전/패키지수/시각 등 영문·숫자 데이터에 적용
- 동기화/배포 버튼 컴팩트(btn-sm) + 액션 셀 높이 고정(row-action)으로 행 점프 제거
- 표 행 높이/hover, 요약 카드 강조(동기화중=blue, GPG통과=mint) + hover, 버튼 누름 피드백
- 연결 상태 폴링 10s → 30s
- SVG favicon (Toss blue 라운드 사각 + 스냅샷 레이어)

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

app/templates/partials/repo_list.html

@@ -4,8 +4,8 @@
   {% else %}
     <div class="summary">
       <div class="card"><div class="value">{{ summary.total }}</div><div class="label">전체 저장소</div></div>
-      <div class="card"><div class="value">{{ summary.syncing }}</div><div class="label">동기화 중</div></div>
-      <div class="card"><div class="value">{{ summary.gpg_pass }}</div><div class="label">GPG 검증 통과</div></div>
+      <div class="card"><div class="value{% if summary.syncing %} is-accent{% endif %}">{{ summary.syncing }}</div><div class="label">동기화 중</div></div>
+      <div class="card"><div class="value is-success">{{ summary.gpg_pass }}</div><div class="label">GPG 검증 통과</div></div>
       <div class="card"><div class="value">{{ summary.total_packages }}</div><div class="label">총 패키지</div></div>
     </div>
 
@@ -29,10 +29,10 @@
             <td><span class="badge badge-{{ repo.gpg.level }}">{{ repo.gpg.label }}</span></td>
             <td class="num">{% if repo.latest_version is not none %}v{{ repo.latest_version }}{% else %}—{% endif %}</td>
             <td class="num">{% if repo.package_count is not none %}{{ repo.package_count }}{% else %}—{% endif %}</td>
-            <td>{{ repo.last_sync or "—" }}</td>
+            <td class="mono">{{ repo.last_sync or "—" }}</td>
             <td>
-              <div id="sync-{{ repo.uuid }}">
-                <button class="secondary"
+              <div id="sync-{{ repo.uuid }}" class="row-action">
+                <button class="secondary btn-sm"
                         hx-post="/repos/{{ repo.uuid }}/sync"
                         hx-target="#sync-{{ repo.uuid }}"
                         hx-swap="innerHTML"