fix(dashboard): 카드 레이아웃 모바일 반응형 개선

모바일 2열×3행 / md 3열×2행 / lg 6열×1행 그리드.
아이콘을 라벨 옆으로 이동, "오늘 +0" 숨김, 카드 높이 통일.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/routes/+page.svelte

@@ -175,80 +175,62 @@
       </div>
     {:else if summary}
       <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-12 gap-4">
-        <!-- ─── 행 1: 카테고리별 카운트 (6칸) ─── -->
-        <a href="/documents" class="lg:col-span-2 block">
-          <Card interactive>
-            <div class="flex items-start justify-between">
-              <p class="text-sm text-dim">문서함</p>
-              <FileText size={16} class="text-faint" />
-            </div>
-            <p class="text-2xl font-bold mt-1 text-text">
-              {(summary.documents_count ?? 0).toLocaleString()}
-            </p>
-            <p class="text-xs text-dim mt-0.5">오늘 +{summary.today_added}</p>
-          </Card>
-        </a>
+        <!-- ─── 행 1: 카테고리별 카운트 ─── -->
+        <!-- 모바일 2열×3행 / md 3열×2행 / lg 6열×1행 -->
+        <div class="col-span-full grid grid-cols-2 md:grid-cols-3 lg:grid-cols-6 gap-3">
+          <a href="/documents" class="block">
+            <Card interactive class="h-full">
+              <p class="text-xs text-dim flex items-center gap-1"><FileText size={12} /> 문서함</p>
+              <p class="text-2xl font-bold mt-1 text-text">{(summary.documents_count ?? 0).toLocaleString()}</p>
+              {#if summary.today_added > 0}
+                <p class="text-[11px] text-accent mt-0.5">+{summary.today_added} 오늘</p>
+              {/if}
+            </Card>
+          </a>
 
-        <a href="/memos" class="lg:col-span-2 block">
-          <Card interactive>
-            <div class="flex items-start justify-between">
-              <p class="text-sm text-dim">메모</p>
-              <StickyNote size={16} class="text-faint" />
-            </div>
-            <p class="text-2xl font-bold mt-1 text-text">
-              {(summary.memos_count ?? 0).toLocaleString()}
-            </p>
-          </Card>
-        </a>
+          <a href="/memos" class="block">
+            <Card interactive class="h-full">
+              <p class="text-xs text-dim flex items-center gap-1"><StickyNote size={12} /> 메모</p>
+              <p class="text-2xl font-bold mt-1 text-text">{(summary.memos_count ?? 0).toLocaleString()}</p>
+            </Card>
+          </a>
 
-        <a href="/news" class="lg:col-span-2 block">
-          <Card interactive>
-            <div class="flex items-start justify-between">
-              <p class="text-sm text-dim">뉴스</p>
-              <Newspaper size={16} class="text-faint" />
-            </div>
-            <p class="text-2xl font-bold mt-1 text-text">
-              {(summary.news_count ?? 0).toLocaleString()}
-            </p>
-          </Card>
-        </a>
+          <a href="/news" class="block">
+            <Card interactive class="h-full">
+              <p class="text-xs text-dim flex items-center gap-1"><Newspaper size={12} /> 뉴스</p>
+              <p class="text-2xl font-bold mt-1 text-text">{(summary.news_count ?? 0).toLocaleString()}</p>
+            </Card>
+          </a>
 
-        <a href="/inbox" class="lg:col-span-2 block">
-          <Card interactive>
-            <div class="flex items-start justify-between">
-              <p class="text-sm text-dim">승인 대기</p>
-              <Inbox size={16} class="text-faint" />
-            </div>
-            <p class="text-2xl font-bold mt-1 {summary.inbox_count > 0 ? 'text-warning' : 'text-text'}">
-              {summary.inbox_count}
-            </p>
-          </Card>
-        </a>
+          <a href="/inbox" class="block">
+            <Card interactive class="h-full">
+              <p class="text-xs text-dim flex items-center gap-1"><Inbox size={12} /> 승인 대기</p>
+              <p class="text-2xl font-bold mt-1 {summary.inbox_count > 0 ? 'text-warning' : 'text-text'}">{summary.inbox_count}</p>
+              {#if summary.inbox_count > 0}
+                <p class="text-[11px] text-accent mt-0.5">분류하기 →</p>
+              {/if}
+            </Card>
+          </a>
 
-        <div class="lg:col-span-2">
-          <Card>
-            <div class="flex items-start justify-between">
-              <p class="text-sm text-dim">법령 알림</p>
-              <Scale size={16} class="text-faint" />
-            </div>
-            <p class="text-2xl font-bold mt-1 text-text">{summary.law_alerts}</p>
-            <p class="text-xs text-dim mt-0.5">오늘 변경</p>
-          </Card>
-        </div>
+          <div>
+            <Card class="h-full">
+              <p class="text-xs text-dim flex items-center gap-1"><Scale size={12} /> 법령 알림</p>
+              <p class="text-2xl font-bold mt-1 text-text">{summary.law_alerts}</p>
+              {#if summary.law_alerts > 0}
+                <p class="text-[11px] text-dim mt-0.5">오늘 변경</p>
+              {/if}
+            </Card>
+          </div>
 
-        <div class="lg:col-span-2">
-          <Card>
-            <div class="flex items-start justify-between">
-              <p class="text-sm text-dim">시스템</p>
-              <Activity size={16} class="text-faint" />
-            </div>
-            {#if systemView}
-              <p class="text-2xl font-bold mt-1 {TONE_TEXT[systemView.tone]}">
-                {systemView.label}
-              </p>
-              <p class="text-xs text-dim mt-0.5">{systemView.sub}</p>
-            {/if}
-          </Card>
+          <div>
+            <Card class="h-full">
+              <p class="text-xs text-dim flex items-center gap-1"><Activity size={12} /> 시스템</p>
+              {#if systemView}
+                <p class="text-2xl font-bold mt-1 {TONE_TEXT[systemView.tone]}">{systemView.label}</p>
+                <p class="text-[11px] text-dim mt-0.5">{systemView.sub}</p>
+              {/if}
+            </Card>
+          </div>
         </div>
 
         <!-- ─── 행 2: 파이프라인 + 도메인 분포 ─── -->