feat: Добавить API для управления настройками пользовательского интерфейса, включая получение и обновление конфигурации из S3; интегрировать модальное окно настроек в интерфейс

backend/server.js

@@ -1049,7 +1049,8 @@ app.get('/api/s3/last-modified', async (req, res) => {
             { name: 'asns', key: 'bgp_data/asns.txt' },
             { name: 'servers', key: 'servers.json' },
             { name: 'filters', key: 'filters.json' },
-            { name: 'ipRanges', key: 'bgp_data/ips.txt' }
+            { name: 'ipRanges', key: 'bgp_data/ips.txt' },
+            { name: 'uiSettings', key: 'bgp_data/rt_ui_settings.json' }
         ];
         const results = await Promise.allSettled(
             keys.map(k => s3.headObject({ Bucket: BUCKET_NAME, Key: k.key }).promise())
@@ -1625,6 +1626,70 @@ app.get('/api/auto-urls', async (req, res) => {
     }
 });
 
+// --- UI Settings (rt_ui_settings.json in bgp_data) ---
+// Get UI settings
+app.get('/api/ui-settings', async (req, res) => {
+    const params = {
+        Bucket: BUCKET_NAME,
+        Key: 'bgp_data/rt_ui_settings.json',
+    };
+
+    try {
+        const data = await s3.getObject(params).promise();
+        const jsonText = data.Body.toString('utf-8');
+        let settings = {};
+        try {
+            const parsed = JSON.parse(jsonText);
+            if (parsed && typeof parsed === 'object') settings = parsed;
+        } catch (parseError) {
+            settings = {};
+        }
+        if (data.ETag) res.set('ETag', String(data.ETag));
+        if (data.LastModified) res.set('Last-Modified', new Date(data.LastModified).toUTCString());
+        if (typeof data.ContentLength === 'number') res.set('Content-Length-Source', String(data.ContentLength));
+        return res.json(settings);
+    } catch (error) {
+        if (error.code === 'NoSuchKey') {
+            return res.json({});
+        }
+        console.error('Error reading ui settings from S3:', error);
+        return sendError(res, 500, 'Error reading UI settings from S3', 'E_S3');
+    }
+});
+
+// Update UI settings
+app.post('/api/ui-settings', async (req, res) => {
+    const { settings, etag } = req.body || {};
+    const payload = (settings && typeof settings === 'object') ? settings : {};
+
+    try {
+        // optimistic concurrency if ETag provided (or If-Match header)
+        let current = null;
+        const ifMatch = req.headers['if-match'] ? String(req.headers['if-match']).replace(/\"/g,'"') : null;
+        try { current = await headS3ObjectEtag('bgp_data/rt_ui_settings.json'); } catch {}
+        if (current && (ifMatch || etag) && current !== String(ifMatch || etag)) {
+            const meta = await headMeta('bgp_data/rt_ui_settings.json');
+            return sendError(res, 412, 'Precondition Failed: ETag mismatch', 'E_ETAG_MISMATCH', { currentEtag: current, meta });
+        }
+    } catch {}
+
+    const params = {
+        Bucket: BUCKET_NAME,
+        Key: 'bgp_data/rt_ui_settings.json',
+        Body: JSON.stringify(payload, null, 2),
+        ContentType: 'application/json',
+    };
+
+    try {
+        await s3.putObject(params).promise();
+        const meta = await headMeta('bgp_data/rt_ui_settings.json');
+        return sendOk(res, meta);
+    } catch (error) {
+        console.error('Error writing UI settings to S3:', error);
+        return sendError(res, 500, 'Error writing UI settings to S3', 'E_S3', { error: String(error?.message || error) });
+    }
+});
+
 // --- Servers availability check ---
 // Optimized TCP check: parallelize ports and hosts, cap per-host time, add in-memory TTL cache
 function tcpCheck(host, port, timeoutMs) {