feat: sound system — 12 new sounds + navigation category; dashboard FAB widget button

Sounds:
- UI: modal_open, modal_close, tab_switch, delete
- Navigation (new category): page_enter, section_reveal
- Classroom: timer_warning, wb_clear, file_shared
- Gamification: challenge_complete, daily_login
- Quiz: time_up, quiz_bonus

Dashboard:
- Widget configurator moved from header to fixed FAB (bottom-right)
  no longer pushed off-screen by wide sidebar

Profile settings:
- Added Navigation category toggle
- Expanded preview section: 12 test buttons covering all categories

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/dashboard.html

@@ -1167,39 +1167,37 @@
       /* Heatmap popup always right-anchored */
       .hm-day-popup { right: 10px !important; left: auto !important; top: auto !important; }
     }
-    /* ── Widget configurator ── */
+    /* ── Widget configurator FAB ── */
-    .dash-cfg-btn {
+    .dash-cfg-fab {
-      margin-left: auto; flex-shrink: 0;
+      display: none; /* shown for students via JS */
-      display: none; /* shown only for students via JS */
+      position: fixed; bottom: 88px; right: 20px; z-index: 80;
-      align-items: center; gap: 6px;
+      width: 44px; height: 44px; border-radius: 50%;
-      padding: 6px 12px; border-radius: 8px;
+      background: #9B5DE5; border: none; cursor: pointer;
-      background: rgba(155,93,229,0.13); border: 1px solid rgba(155,93,229,0.3);
+      box-shadow: 0 4px 16px rgba(155,93,229,0.45);
-      color: #9B5DE5; font-size: 0.78rem; font-weight: 600; cursor: pointer;
+      align-items: center; justify-content: center;
-      transition: background .15s;
+      transition: transform .15s, box-shadow .15s;
     }
-    .dash-cfg-btn:hover { background: rgba(155,93,229,0.22); }
+    .dash-cfg-fab:hover { transform: scale(1.08); box-shadow: 0 6px 24px rgba(155,93,229,0.55); }
-    .dash-cfg-btn svg { width: 14px; height: 14px; flex-shrink: 0; }
+    .dash-cfg-fab svg { width: 20px; height: 20px; color: #fff; flex-shrink: 0; }
     .dash-cfg-panel {
-      display: none; position: absolute; top: calc(100% + 6px); right: 0;
+      display: none; position: fixed; bottom: 140px; right: 20px;
       background: #1e1b2e; border: 1px solid rgba(155,93,229,0.3);
-      border-radius: 12px; padding: 12px; min-width: 210px; z-index: 50;
+      border-radius: 14px; padding: 14px; min-width: 220px; z-index: 81;
-      box-shadow: 0 8px 24px rgba(0,0,0,.35);
+      box-shadow: 0 8px 32px rgba(0,0,0,.45);
     }
     .dash-cfg-panel.open { display: block; }
     .dash-cfg-title {
       font-size: 0.72rem; font-weight: 700; color: #9B5DE5;
-      text-transform: uppercase; letter-spacing: .5px; margin-bottom: 8px;
+      text-transform: uppercase; letter-spacing: .5px; margin-bottom: 10px;
     }
     .dash-cfg-row {
       display: flex; align-items: center; justify-content: space-between;
-      padding: 6px 4px; border-radius: 6px; cursor: pointer;
+      padding: 7px 4px; border-radius: 6px; cursor: pointer;
     }
     .dash-cfg-row:hover { background: rgba(255,255,255,.05); }
-    .dash-cfg-row label {
+    .dash-cfg-row label { font-size: 0.83rem; color: #e2e8f0; cursor: pointer; flex: 1; }
-      font-size: 0.82rem; color: #e2e8f0; cursor: pointer; flex: 1;
-    }
     .dash-cfg-row input[type=checkbox] { accent-color: #9B5DE5; width: 15px; height: 15px; cursor: pointer; }
-    .dash-cfg-wrap { position: relative; }
+    .dash-cfg-wrap { display: contents; }
   </style>
   <script src="https://cdn.jsdelivr.net/npm/lucide@0.469.0/dist/umd/lucide.min.js"></script>
 </head>
@@ -1222,20 +1220,19 @@
       <div class="stat-ring" id="sr-streak"></div>
       <div class="stat-ring" id="sr-pending"></div>
     </div>
-    <div class="dash-cfg-wrap" id="dash-cfg-wrap">
+  </div>
-      <button class="dash-cfg-btn" id="dash-cfg-btn" onclick="toggleDashCfg(event)" title="Настроить виджеты">
+
-        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="3"/><path d="M19.4 15a1.65 1.65 0 0 0 .33 1.82l.06.06a2 2 0 0 1-2.83 2.83l-.06-.06a1.65 1.65 0 0 0-1.82-.33 1.65 1.65 0 0 0-1 1.51V21a2 2 0 0 1-4 0v-.09A1.65 1.65 0 0 0 9 19.4a1.65 1.65 0 0 0-1.82.33l-.06.06a2 2 0 0 1-2.83-2.83l.06-.06A1.65 1.65 0 0 0 4.68 15a1.65 1.65 0 0 0-1.51-1H3a2 2 0 0 1 0-4h.09A1.65 1.65 0 0 0 4.6 9a1.65 1.65 0 0 0-.33-1.82l-.06-.06a2 2 0 0 1 2.83-2.83l.06.06A1.65 1.65 0 0 0 9 4.68a1.65 1.65 0 0 0 1-1.51V3a2 2 0 0 1 4 0v.09a1.65 1.65 0 0 0 1 1.51 1.65 1.65 0 0 0 1.82-.33l.06-.06a2 2 0 0 1 2.83 2.83l-.06.06A1.65 1.65 0 0 0 19.4 9a1.65 1.65 0 0 0 1.51 1H21a2 2 0 0 1 0 4h-.09a1.65 1.65 0 0 0-1.51 1z"/></svg>
+  <!-- Widget configurator FAB (fixed, outside header flow) -->
-        Виджеты
+  <button class="dash-cfg-fab" id="dash-cfg-btn" onclick="toggleDashCfg(event)" title="Настроить виджеты">
-      </button>
+    <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="3"/><path d="M19.4 15a1.65 1.65 0 0 0 .33 1.82l.06.06a2 2 0 0 1-2.83 2.83l-.06-.06a1.65 1.65 0 0 0-1.82-.33 1.65 1.65 0 0 0-1 1.51V21a2 2 0 0 1-4 0v-.09A1.65 1.65 0 0 0 9 19.4a1.65 1.65 0 0 0-1.82.33l-.06.06a2 2 0 0 1-2.83-2.83l.06-.06A1.65 1.65 0 0 0 4.68 15a1.65 1.65 0 0 0-1.51-1H3a2 2 0 0 1 0-4h.09A1.65 1.65 0 0 0 4.6 9a1.65 1.65 0 0 0-.33-1.82l-.06-.06a2 2 0 0 1 2.83-2.83l.06.06A1.65 1.65 0 0 0 9 4.68a1.65 1.65 0 0 0 1-1.51V3a2 2 0 0 1 4 0v.09a1.65 1.65 0 0 0 1 1.51 1.65 1.65 0 0 0 1.82-.33l.06-.06a2 2 0 0 1 2.83 2.83l-.06.06A1.65 1.65 0 0 0 19.4 9a1.65 1.65 0 0 0 1.51 1H21a2 2 0 0 1 0 4h-.09a1.65 1.65 0 0 0-1.51 1z"/></svg>
-      <div class="dash-cfg-panel" id="dash-cfg-panel">
+  </button>
-        <div class="dash-cfg-title">Показывать виджеты</div>
+  <div class="dash-cfg-panel" id="dash-cfg-panel">
-        <div class="dash-cfg-row" onclick="toggleDashWidget('lb-section',this)"><label>Рейтинг</label><input type="checkbox" data-widget="lb-section" checked></div>
+    <div class="dash-cfg-title">Показывать виджеты</div>
-        <div class="dash-cfg-row" onclick="toggleDashWidget('ch-section',this)"><label>Испытания недели</label><input type="checkbox" data-widget="ch-section" checked></div>
+    <div class="dash-cfg-row" onclick="toggleDashWidget('lb-section',this)"><label>Рейтинг</label><input type="checkbox" data-widget="lb-section" checked></div>
-        <div class="dash-cfg-row" onclick="toggleDashWidget('stats-section',this)"><label>Статистика</label><input type="checkbox" data-widget="stats-section" checked></div>
+    <div class="dash-cfg-row" onclick="toggleDashWidget('ch-section',this)"><label>Испытания недели</label><input type="checkbox" data-widget="ch-section" checked></div>
-        <div class="dash-cfg-row" onclick="toggleDashWidget('w-my-subs',this)"><label>Мои сдачи</label><input type="checkbox" data-widget="w-my-subs" checked></div>
+    <div class="dash-cfg-row" onclick="toggleDashWidget('stats-section',this)"><label>Статистика</label><input type="checkbox" data-widget="stats-section" checked></div>
-        <div class="dash-cfg-row" onclick="toggleDashWidget('w-theory-progress',this)"><label>Теория</label><input type="checkbox" data-widget="w-theory-progress" checked></div>
+    <div class="dash-cfg-row" onclick="toggleDashWidget('w-my-subs',this)"><label>Мои сдачи</label><input type="checkbox" data-widget="w-my-subs" checked></div>
-      </div>
+    <div class="dash-cfg-row" onclick="toggleDashWidget('w-theory-progress',this)"><label>Теория</label><input type="checkbox" data-widget="w-theory-progress" checked></div>
-    </div>
   </div>
 
   <div class="container">

frontend/profile.html

@@ -819,7 +819,7 @@
               <div class="p-card-icon"><i data-lucide="volume-2" style="width:15px;height:15px"></i></div>
               <div>
                 <div class="p-card-title">Звуки системы</div>
-                <div class="p-card-sub">Уведомления, геймификация, classroom, квизы</div>
+                <div class="p-card-sub">Синтезированные — не требуют загрузки файлов</div>
               </div>
             </div>
 
@@ -854,7 +854,7 @@
             <div class="pref-row">
               <div class="pref-row-info">
                 <div class="pref-row-label">Интерфейс</div>
-                <div class="pref-row-desc">Клики, успех, ошибки, уведомления</div>
+                <div class="pref-row-desc">Клики, модальные окна, удаление, уведомления</div>
               </div>
               <label class="pref-toggle">
                 <input type="checkbox" id="pref-sfx-ui" onchange="prefSfxCat('ui',this.checked)">
@@ -862,11 +862,23 @@
               </label>
             </div>
 
+            <!-- Navigation sounds -->
+            <div class="pref-row">
+              <div class="pref-row-info">
+                <div class="pref-row-label">Навигация</div>
+                <div class="pref-row-desc">Переходы между страницами и секциями</div>
+              </div>
+              <label class="pref-toggle">
+                <input type="checkbox" id="pref-sfx-navigation" onchange="prefSfxCat('navigation',this.checked)">
+                <span class="pref-toggle-track"></span>
+              </label>
+            </div>
+
             <!-- Classroom sounds -->
             <div class="pref-row">
               <div class="pref-row-info">
                 <div class="pref-row-label">Classroom</div>
-                <div class="pref-row-desc">Урок, участники, чат, рука, рисование</div>
+                <div class="pref-row-desc">Урок, участники, таймер, доска, файлы</div>
               </div>
               <label class="pref-toggle">
                 <input type="checkbox" id="pref-sfx-classroom" onchange="prefSfxCat('classroom',this.checked)">
@@ -878,7 +890,7 @@
             <div class="pref-row">
               <div class="pref-row-info">
                 <div class="pref-row-label">Геймификация</div>
-                <div class="pref-row-desc">XP, уровень, достижения, монеты</div>
+                <div class="pref-row-desc">XP, уровень, достижения, испытания, вход</div>
               </div>
               <label class="pref-toggle">
                 <input type="checkbox" id="pref-sfx-gamification" onchange="prefSfxCat('gamification',this.checked)">
@@ -890,7 +902,7 @@
             <div class="pref-row">
               <div class="pref-row-info">
                 <div class="pref-row-label">Квизы</div>
-                <div class="pref-row-desc">Старт вопроса, правильно, неправильно</div>
+                <div class="pref-row-desc">Старт, правильно/неправильно, таймер, бонус</div>
               </div>
               <label class="pref-toggle">
                 <input type="checkbox" id="pref-sfx-quiz" onchange="prefSfxCat('quiz',this.checked)">
@@ -898,23 +910,56 @@
               </label>
             </div>
 
-            <!-- Test button -->
+            <!-- Preview buttons -->
-            <div style="margin-top:14px;display:flex;gap:8px;flex-wrap:wrap">
+            <div class="pref-section-label" style="margin-top:14px">Прослушать</div>
+            <div style="display:flex;gap:8px;flex-wrap:wrap;margin-top:8px">
               <button class="pref-test-btn" onclick="prefSfxTest('notification')">
                 <i data-lucide="bell" style="width:12px;height:12px;vertical-align:-2px"></i>
                 Уведомление
               </button>
+              <button class="pref-test-btn" onclick="prefSfxTest('success')">
+                <i data-lucide="check-circle" style="width:12px;height:12px;vertical-align:-2px"></i>
+                Успех
+              </button>
+              <button class="pref-test-btn" onclick="prefSfxTest('error')">
+                <i data-lucide="x-circle" style="width:12px;height:12px;vertical-align:-2px"></i>
+                Ошибка
+              </button>
+              <button class="pref-test-btn" onclick="prefSfxTest('modal_open')">
+                <i data-lucide="layout" style="width:12px;height:12px;vertical-align:-2px"></i>
+                Модал
+              </button>
+              <button class="pref-test-btn" onclick="prefSfxTest('page_enter')">
+                <i data-lucide="arrow-right" style="width:12px;height:12px;vertical-align:-2px"></i>
+                Навигация
+              </button>
+              <button class="pref-test-btn" onclick="prefSfxTest('lesson_start')">
+                <i data-lucide="play" style="width:12px;height:12px;vertical-align:-2px"></i>
+                Урок
+              </button>
+              <button class="pref-test-btn" onclick="prefSfxTest('timer_warning')">
+                <i data-lucide="clock" style="width:12px;height:12px;vertical-align:-2px"></i>
+                Таймер
+              </button>
               <button class="pref-test-btn" onclick="prefSfxTest('achievement')">
                 <i data-lucide="trophy" style="width:12px;height:12px;vertical-align:-2px"></i>
                 Ачивка
               </button>
+              <button class="pref-test-btn" onclick="prefSfxTest('challenge_complete')">
+                <i data-lucide="target" style="width:12px;height:12px;vertical-align:-2px"></i>
+                Испытание
+              </button>
               <button class="pref-test-btn" onclick="prefSfxTest('level_up')">
                 <i data-lucide="zap" style="width:12px;height:12px;vertical-align:-2px"></i>
                 Уровень
               </button>
-              <button class="pref-test-btn" onclick="prefSfxTest('lesson_start')">
+              <button class="pref-test-btn" onclick="prefSfxTest('quiz_correct')">
-                <i data-lucide="play" style="width:12px;height:12px;vertical-align:-2px"></i>
+                <i data-lucide="check" style="width:12px;height:12px;vertical-align:-2px"></i>
-                Урок
+                Правильно
+              </button>
+              <button class="pref-test-btn" onclick="prefSfxTest('time_up')">
+                <i data-lucide="timer-off" style="width:12px;height:12px;vertical-align:-2px"></i>
+                Время вышло
               </button>
             </div>
           </div>
@@ -1537,6 +1582,7 @@
     const setChk = (id, v) => { const el = document.getElementById(id); if (el) el.checked = v; };
     setChk('pref-sfx-enabled',      sfx.enabled);
     setChk('pref-sfx-ui',           sfx.prefs.ui);
+    setChk('pref-sfx-navigation',   sfx.prefs.navigation !== false);
     setChk('pref-sfx-classroom',    sfx.prefs.classroom);
     setChk('pref-sfx-gamification', sfx.prefs.gamification);
     setChk('pref-sfx-quiz',         sfx.prefs.quiz);

js/sound.js

@@ -134,6 +134,36 @@
             _tone(880, 80, 'sine', 0.13, 5, 50);
             setTimeout(function () { _tone(1108, 120, 'sine', 0.15, 5, 80); }, 90);
         },
+        modal_open: function () {
+            // Soft sweep in — airy whoosh up
+            _sweep(300, 520, 180, 'sine', 0.09);
+            setTimeout(function () { _tone(660, 100, 'sine', 0.08, 5, 70); }, 160);
+        },
+        modal_close: function () {
+            // Sweep down — gentle dismiss
+            _sweep(520, 300, 150, 'sine', 0.08);
+        },
+        tab_switch: function () {
+            // Double-click feel
+            _tone(900, 35, 'sine', 0.09, 2, 25);
+            setTimeout(function () { _tone(1100, 35, 'sine', 0.09, 2, 25); }, 45);
+        },
+        delete: function () {
+            // Descending soft thud
+            _sweep(400, 180, 120, 'triangle', 0.10);
+            _noise(80, 0.04);
+        },
+
+        // ── Navigation ────────────────────────────────────────────────────────
+        page_enter: function () {
+            // Subtle arrival chime
+            _tone(784, 80, 'sine', 0.08, 5, 55);
+            setTimeout(function () { _tone(1047, 120, 'sine', 0.07, 5, 80); }, 75);
+        },
+        section_reveal: function () {
+            // Very quiet rising whoosh
+            _sweep(250, 420, 200, 'sine', 0.07);
+        },
 
         // ── Classroom ─────────────────────────────────────────────────────────
         hand_raise: function () {
@@ -173,6 +203,23 @@
             setTimeout(function () { _tone(330, 160, 'sine', 0.14, 10, 100); }, 140);
             setTimeout(function () { _tone(261, 350, 'sine', 0.13, 10, 220); }, 280);
         },
+        timer_warning: function () {
+            // Urgent triple beep — last 10 seconds
+            _tone(880, 60, 'square', 0.12, 2, 40);
+            setTimeout(function () { _tone(880, 60, 'square', 0.13, 2, 40); }, 200);
+            setTimeout(function () { _tone(1108, 100, 'square', 0.15, 2, 70); }, 400);
+        },
+        wb_clear: function () {
+            // Erasing noise sweep
+            _noise(220, 0.08);
+            _sweep(600, 200, 220, 'triangle', 0.06);
+        },
+        file_shared: function () {
+            // Paper rustle + chime
+            _noise(80, 0.05);
+            setTimeout(function () { _tone(784, 100, 'sine', 0.12, 5, 70); }, 60);
+            setTimeout(function () { _tone(1047, 120, 'sine', 0.10, 5, 80); }, 160);
+        },
 
         // ── Gamification ──────────────────────────────────────────────────────
         xp_gain: function () {
@@ -218,6 +265,21 @@
             setTimeout(function () { _tone(659, 80, 'sine', 0.14, 5, 55); }, 80);
             setTimeout(function () { _tone(784, 160, 'sine', 0.16, 5, 100); }, 160);
         },
+        challenge_complete: function () {
+            // Heroic: E4-G4-B4-E5 arpeggio
+            _tone(330, 140, 'sine', 0.15, 8, 90);
+            setTimeout(function () { _tone(392, 140, 'sine', 0.16, 8, 90); }, 130);
+            setTimeout(function () { _tone(494, 140, 'sine', 0.17, 8, 90); }, 260);
+            setTimeout(function () { _tone(659, 400, 'sine', 0.20, 8, 260); }, 390);
+            // Sparkle on top
+            setTimeout(function () { _tone(1319, 200, 'triangle', 0.07); }, 450);
+        },
+        daily_login: function () {
+            // Morning chime: G-A-B
+            _tone(392, 120, 'sine', 0.12, 8, 80);
+            setTimeout(function () { _tone(440, 120, 'sine', 0.13, 8, 80); }, 110);
+            setTimeout(function () { _tone(494, 250, 'sine', 0.15, 8, 160); }, 220);
+        },
 
         // ── Quiz ──────────────────────────────────────────────────────────────
         quiz_start: function () {
@@ -244,6 +306,20 @@
         quiz_tick: function () {
             _tone(660, 40, 'square', 0.08, 2, 25);
         },
+        time_up: function () {
+            // Buzzer — descending sawtooth alarm
+            _tone(440, 120, 'sawtooth', 0.14, 3, 80);
+            _noise(120, 0.06);
+            setTimeout(function () { _tone(330, 160, 'sawtooth', 0.12, 3, 110); }, 110);
+            setTimeout(function () { _tone(220, 220, 'sawtooth', 0.10, 3, 160); }, 240);
+        },
+        quiz_bonus: function () {
+            // Golden sparkle — high twinkling
+            _tone(1047, 60, 'sine', 0.14, 2, 45);
+            setTimeout(function () { _tone(1319, 60, 'sine', 0.16, 2, 45); }, 65);
+            setTimeout(function () { _tone(1568, 60, 'sine', 0.17, 2, 45); }, 130);
+            setTimeout(function () { _tone(2093, 180, 'sine', 0.18, 2, 120); }, 195);
+        },
     };
 
     // ── Persistence ───────────────────────────────────────────────────────────
@@ -272,6 +348,7 @@
         volume  : 0.75,
         prefs   : {
             ui           : true,
+            navigation   : true,
             classroom    : true,
             gamification : true,
             quiz         : true,
@@ -280,14 +357,18 @@
         // Category map — which prefs key each sound belongs to
         _cats: {
             click: 'ui', success: 'ui', error: 'ui', notification: 'ui',
+            modal_open: 'ui', modal_close: 'ui', tab_switch: 'ui', delete: 'ui',
+            page_enter: 'navigation', section_reveal: 'navigation',
             hand_raise: 'classroom', chat_message: 'classroom',
             user_joined: 'classroom', user_left: 'classroom',
             muted: 'classroom', draw_permitted: 'classroom',
             lesson_start: 'classroom', lesson_end: 'classroom',
+            timer_warning: 'classroom', wb_clear: 'classroom', file_shared: 'classroom',
             xp_gain: 'gamification', level_up: 'gamification',
             achievement: 'gamification', coin: 'gamification', streak: 'gamification',
+            challenge_complete: 'gamification', daily_login: 'gamification',
             quiz_start: 'quiz', quiz_correct: 'quiz', quiz_wrong: 'quiz',
-            quiz_end: 'quiz', quiz_tick: 'quiz',
+            quiz_end: 'quiz', quiz_tick: 'quiz', time_up: 'quiz', quiz_bonus: 'quiz',
         },
 
         play: function (name) {