Merge feature/add_skin into master: resolve all conflicts

- GameGlobal.js: keep upstream SERVER_URL with /ws suffix
- en.js/zh.js: merge both settings.nickname and settings.profile keys
- SettingsScene.js: keep both nickname row and profile button
- server/index.js: merge express app + content security proxy with
  noServer WebSocket mode and path validation
- Add .gitignore for node_modules and .codebuddy

js/scenes/SettingsScene.js

@@ -90,6 +90,10 @@ const SettingsScene = {
       }
     }
 
+    // Profile entry button (below the last toggle row)
+    const profileY = firstCenterY + rows.length * step;
+    this._renderProfileButton(ctx, cx, profileY);
+
     // Back button
     this._renderBackButton(ctx, cx, backCenterY);
   },
@@ -180,6 +184,34 @@ const SettingsScene = {
     ctx.fill();
   },
 
+  _renderProfileButton(ctx, cx, y) {
+    const w = SCREEN_WIDTH * 0.7;
+    const h = 50;
+    const x = cx - w / 2;
+
+    this._buttons['profile'] = { x, y: y - h / 2, w, h };
+
+    // Background
+    ctx.fillStyle = '#1e1e3a';
+    ctx.fillRect(x, y - h / 2, w, h);
+    ctx.strokeStyle = '#333366';
+    ctx.lineWidth = 1;
+    ctx.strokeRect(x, y - h / 2, w, h);
+
+    // Icon and label
+    ctx.fillStyle = COLORS.HUD_TEXT;
+    ctx.font = '16px Arial';
+    ctx.textAlign = 'left';
+    ctx.textBaseline = 'middle';
+    ctx.fillText(`👤  ${t('settings.profile')}`, x + 15, y);
+
+    // Arrow indicator
+    ctx.fillStyle = '#888888';
+    ctx.font = '14px Arial';
+    ctx.textAlign = 'right';
+    ctx.fillText('›', x + w - 15, y);
+  },
+
   _renderBackButton(ctx, cx, y) {
     const w = SCREEN_WIDTH * 0.4;
     const h = 42;
@@ -215,6 +247,13 @@ const SettingsScene = {
           // IMPORTANT: wx.getUserProfile must be called synchronously from a
           // user tap handler; invoking it here is fine (touchstart is a tap).
           this._requestNicknameAuth();
+        } else if (key === 'profile') {
+          const sm = GameGlobal.sceneManager;
+          if (!sm._scenes.has(SCENE.PROFILE)) {
+            const ProfileScene = require('./ProfileScene');
+            sm.register(SCENE.PROFILE, ProfileScene);
+          }
+          sm.switchTo(SCENE.PROFILE);
         } else if (this._settings.hasOwnProperty(key)) {
           this._settings[key] = !this._settings[key];
           // Notify audio system