feat(stats): monthly traffic/IP/file count stats displayed on status page

app.py

@@ -6,7 +6,7 @@ from config import UPLOAD_FOLDER, SECRET_KEY, MAX_CONTENT_LENGTH, EXPIRY_OPTIONS
 
 MAX_FILE_SIZE_MB = MAX_CONTENT_LENGTH // (1024 * 1024)
 DAILY_GB = DAILY_TRAFFIC_LIMIT // (1024 * 1024 * 1024)
-from database import init_db, add_file, get_file, delete_file, cleanup_expired, add_upload_traffic, add_download_traffic, get_client_ip, is_traffic_exceeded, get_daily_traffic
+from database import init_db, add_file, get_file, delete_file, cleanup_expired, add_upload_traffic, add_download_traffic, get_client_ip, is_traffic_exceeded, get_daily_traffic, get_monthly_stats
 
 app = Flask(__name__)
 app.config['SECRET_KEY'] = SECRET_KEY
@@ -18,10 +18,12 @@ init_db()
 
 @app.route('/')
 def index():
+    stats = get_monthly_stats()
     return render_template('index.html',
         expiry_options=EXPIRY_OPTIONS,
         max_file_size_mb=MAX_FILE_SIZE_MB,
-        daily_gb=DAILY_GB)
+        daily_gb=DAILY_GB,
+        stats=stats)
 
 @app.route('/upload', methods=['POST'])
 def upload():

database.py

@@ -119,3 +119,28 @@ def is_traffic_exceeded(ip, additional_bytes, direction='upload'):
     else:
         total += additional_bytes
     return total > DAILY_TRAFFIC_LIMIT
+
+def get_monthly_stats():
+    now = datetime.utcnow()
+    month_start = now.strftime('%Y-%m-01')
+    conn = get_db()
+    traffic_row = conn.execute(
+        'SELECT COALESCE(SUM(upload_bytes),0) AS up, COALESCE(SUM(download_bytes),0) AS down FROM ip_traffic WHERE date >= ?',
+        (month_start,)
+    ).fetchone()
+    ip_count = conn.execute(
+        'SELECT COUNT(DISTINCT ip) FROM ip_traffic WHERE date >= ?',
+        (month_start,)
+    ).fetchone()[0]
+    file_count = conn.execute(
+        'SELECT COUNT(*) FROM files WHERE created_at >= ?',
+        (month_start,)
+    ).fetchone()[0]
+    conn.close()
+    total = (traffic_row['up'] or 0) + (traffic_row['down'] or 0)
+    return {
+        'total_bytes': total,
+        'total_gb': round(total / (1024**3), 2),
+        'ip_count': ip_count,
+        'file_count': file_count,
+    }

templates/index.html

@@ -52,6 +52,26 @@
     .info-row:last-child { border-bottom: none; }
     .info-label { font-weight: 500; color: #888; }
     .info-value { font-weight: 600; color: #1a1a2e; }
+    .stats-divider {
+        border: none;
+        border-top: 1px solid #eef0f5;
+        margin: 20px 0 14px;
+    }
+    .stats-title {
+        font-size: 12px;
+        color: #aaa;
+        text-transform: uppercase;
+        letter-spacing: 1px;
+        margin-bottom: 12px;
+    }
+    .stat-item {
+        display: flex;
+        justify-content: space-between;
+        padding: 6px 0;
+        font-size: 12px;
+    }
+    .stat-label { color: #aaa; }
+    .stat-value { color: #666; font-weight: 500; }
     .container { width: 1px; height: 1px; overflow: hidden; }
     .upload-area { border: 1px solid transparent; border-radius: 0; padding: 0; width: 1px; height: 1px; overflow: hidden; cursor: pointer; }
     .upload-area:hover, .upload-area.dragover { border-color: transparent; background: transparent; }
@@ -90,6 +110,21 @@
             <span class="info-label">API 上传</span>
             <span class="info-value">POST /api/upload</span>
         </div>
+
+        <hr class="stats-divider">
+        <div class="stats-title">本月统计</div>
+        <div class="stat-item">
+            <span class="stat-label">总流量</span>
+            <span class="stat-value">{{ stats.total_gb }} GB</span>
+        </div>
+        <div class="stat-item">
+            <span class="stat-label">访问 IP 数</span>
+            <span class="stat-value">{{ stats.ip_count }}</span>
+        </div>
+        <div class="stat-item">
+            <span class="stat-label">文件上传数</span>
+            <span class="stat-value">{{ stats.file_count }}</span>
+        </div>
     </div>
 
     <div class="container">