feat: Enhance GraphView component with custom control panel for zooming and fullscreen functionality, and add country flag display for improved user experience

frontend/src/GraphView.jsx

@@ -2,7 +2,6 @@ import React, { useMemo, useCallback, useEffect, useRef } from 'react';
 import {
   ReactFlow,
   Background,
-  Controls,
   MiniMap,
   useEdgesState,
   useNodesState,
@@ -10,10 +9,12 @@ import {
   MarkerType,
 } from '@xyflow/react';
 import '@xyflow/react/dist/style.css';
+import { IconZoomIn, IconZoomOut, IconMaximize, IconMinimize } from '@tabler/icons-react';
 
 function GraphView({ servers, connections }) {
   const flowRef = useRef(null);
   const instanceRef = useRef(null);
+  const containerRef = useRef(null);
 
   const getTunnelStyle = useCallback((tunnelType) => {
     const map = {
@@ -89,6 +90,15 @@ function GraphView({ servers, connections }) {
       server: ({ data }) => {
         const s = data.server || {};
         const countryColor = getCountryColor(s.country);
+        const getFlagEmoji = (code) => {
+          if (!code) return '';
+          const map = { SWE: 'SE', UK: 'GB' };
+          const ccRaw = String(code).trim().toUpperCase();
+          const cc = (map[ccRaw] || ccRaw).slice(0, 2);
+          if (cc.length !== 2) return ccRaw;
+          return cc.replace(/./g, (ch) => String.fromCodePoint(127397 + ch.charCodeAt()));
+        };
+        const flag = getFlagEmoji(s.country);
         return (
           <div
             className="card shadow-sm"
@@ -101,18 +111,21 @@ function GraphView({ servers, connections }) {
             }}
           >
             <div className="px-2 py-1 d-flex align-items-center" style={{ background: '#f8fafc', borderBottom: '1px solid #eef2f7' }}>
-              <span
-                className="badge"
-                style={{
-                  background: '#fff',
-                  color: '#475569',
-                  border: `1px solid ${countryColor}`,
-                  borderRadius: 8,
-                  fontSize: 11,
-                }}
-              >
-                {String(s.country || '').toUpperCase().slice(0, 3)}
-              </span>
+              <div className="d-flex align-items-center" style={{ gap: 6 }}>
+                <span style={{ fontSize: 16, lineHeight: '1' }}>{flag}</span>
+                <span
+                  className="badge"
+                  style={{
+                    background: '#fff',
+                    color: '#475569',
+                    border: `1px solid ${countryColor}`,
+                    borderRadius: 8,
+                    fontSize: 11,
+                  }}
+                >
+                  {String(s.country || '').toUpperCase().slice(0, 3)}
+                </span>
+              </div>
               <div className="ms-2 text-truncate" style={{ fontWeight: 700, color: '#1f2937', fontSize: 13 }}>{s.dns}</div>
             </div>
             <div className="px-2 py-2" style={{ lineHeight: 1.2 }}>
@@ -160,7 +173,7 @@ function GraphView({ servers, connections }) {
   }
 
   return (
-    <div style={{ width: '100%', height: 500, border: '1px solid #e5e7eb', borderRadius: 8, overflow: 'hidden' }}>
+    <div ref={containerRef} style={{ width: '100%', height: 500, border: '1px solid #e5e7eb', borderRadius: 8, overflow: 'hidden', position: 'relative' }}>
       <ReactFlow
         ref={flowRef}
         nodes={nodes}
@@ -182,8 +195,52 @@ function GraphView({ servers, connections }) {
           nodeStrokeWidth={2}
           maskColor="rgba(0,0,0,0.05)"
         />
-        <Controls position="top-right" showInteractive={false} />
       </ReactFlow>
+      {/* Своя панель управления: -, +, Fit, Fullscreen */}
+      <div className="position-absolute" style={{ right: 10, top: 10, zIndex: 10, pointerEvents: 'auto' }}>
+        <div className="btn-group btn-group-sm">
+          <button
+            type="button"
+            className="btn btn-outline-secondary"
+            onClick={() => instanceRef.current?.zoomOut?.()}
+            title="Уменьшить"
+          >
+            <IconZoomOut size={16} />
+          </button>
+          <button
+            type="button"
+            className="btn btn-outline-secondary"
+            onClick={() => instanceRef.current?.zoomIn?.()}
+            title="Увеличить"
+          >
+            <IconZoomIn size={16} />
+          </button>
+          <button
+            type="button"
+            className="btn btn-outline-secondary"
+            onClick={() => instanceRef.current?.fitView?.({ padding: 0.2 })}
+            title="Подогнать к окну"
+          >
+            Fit
+          </button>
+          <button
+            type="button"
+            className="btn btn-outline-secondary"
+            onClick={() => {
+              const el = containerRef.current;
+              if (!el) return;
+              if (!document.fullscreenElement) {
+                el.requestFullscreen?.();
+              } else {
+                document.exitFullscreen?.();
+              }
+            }}
+            title="Во весь экран"
+          >
+            {document.fullscreenElement ? <IconMinimize size={16} /> : <IconMaximize size={16} />}
+          </button>
+        </div>
+      </div>
     </div>
   );
 }