feat(labs): visual polish wave — LabFX foundation + 33 sims juiced up

ФУНДАМЕНТ (4 новых файла):
- _fx_core.js: LabFX namespace, glow.drawGlow, glow.pulse, haptic, shake
- _fx_particles.js: пул 1500 объектов, 6 shapes (dot/spark/ring/smoke/splash/dust)
- _fx_motion.js: tween + 12 easings + critically-damped spring
- _fx_sound.js: 9 procedural synth-звуков (click/tick/whoosh/chime/fizz/spark/bounce/pour/drone), Web Audio API
- Sound toggle в шапке lab.html с localStorage-persist

UX МИКРО (CSS + JS):
- Button states: hover scale+brightness, active scale-down, disabled grayscale
- Slider polish: custom thumb с тенью, filled-track gradient, hover/active
- Focus rings через :focus-visible
- Tooltip system .tt-host data-tt= с 400ms hover, fade-in
- Marching ants для selection
- Loading skeleton с shimmer
- Empty state .sim-empty-* паттерн
- Toast: progress bar внизу, icons по типу
- Cursor states utility classes
- View Transitions API для smooth sim-switch, fallback на CSS fade

PHASE 2 — визуальные эффекты для 33 симуляций:

Physics motion: projectile (launch whoosh + landing splash/shake/haptic + target chime), pendulum (max-extension tick + bob glow), collision (bounce + sparks + shake), angrybirds (whoosh/bounce/fizz/chime + confetti), newton (rocket flame trail + scene transitions), forcesandbox (spring glow + impact sparks)

Physics fields: emfield (field-lines glow + particle trail + lightning при high field + Gauss-drag haptic + rod motion sparks), circuit (energized-wire glow ∝ current + LED bloom + short-circuit shake/spark + heat shimmer smoke + place/erase/switch sounds), opticsbench (beam glow на всех режимах + caustics dust у фокуса + TIR/Brewster one-shot sounds)

Thermo+waves: waves (mode-switch whoosh + Mach-cone particles + spectrum harmonic chime + waveform glow), hydrostatics (pour sound + splash при погружении + valve click), isoprocess (PV-trail dust), heatengine (drone цикла + hot/cold reservoir smoke/dust + phase-change ticks), radioactive (Geiger tick throttle + decay sparks + half-life chime + α/β/γ glow)

Chemistry: chemsandbox (pour splash + fizz bubbles/dust/spark по типу реакции + shake при горении), equilibrium/electrolysis/reactions/titration/flask/ionexchange/redox (pour/fizz/spark/chime по событиям, частицы при ключевых моментах), stoichiometry (fizz bubbles + recipe-change click)

Math+geom: geometry (tool-click + object-create tick + locus glow + challenge confetti via LabFX + haptic), triangle (vertex-drop tick + special-point glow), stereo (figure-change whoosh + cross-section chime, no particles — Three.js), trigcircle (drag-haptic + pitch∝angle tick + sin/cos glow), graph/graphtransform/quadratic (slider-tick throttled + curve glow + discriminant-cross chime), probability (bounce + finish-chime burst), normaldist (pulsing shade + bell glow)

Bio+misc: celldivision (phase-change whoosh + prophase dust + anaphase poles spark + cytokinesis chime), photosynthesis (photon tick + ATP chime + glucose sparkle), bohratom (electron-jump chime ∝ levels + photon spark), orbitals/crystal (mode-change whoosh — Three.js, sound only), logic (gate-place + wire-connect + LED bloom + HIGH wire flowing dots + preset chime), gas/brownian/diffusion/states (preset whoosh, throttled tick по событиям)

Все LabFX вызовы обёрнуты в if (window.LabFX) guard — graceful degradation если фундамент не загружен. 47 JS файлов прошли syntax check.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/js/labs/states.js

@@ -22,6 +22,8 @@ class StatesSim {
     this._raf            = null;
     this._stepCount      = 0;
     this._loop           = this._loop.bind(this);
+    this._fxLastT        = 0;
+    this._fxTickTimer    = 0;  // throttle temperature slider tick sound
     this._wallImpulse    = 0;
     this._pressureSmooth = 0;
     this._energyHistory  = [];
@@ -98,6 +100,15 @@ class StatesSim {
       const f = Math.min(4, Math.sqrt(this.T / old));
       for (const p of this.particles) { p.vx *= f; p.vy *= f; }
     }
+    // throttled tick sound for temperature slider (pitch ∝ T)
+    if (window.LabFX) {
+      const nowMs = performance.now();
+      if (nowMs - this._fxTickTimer > 120) {
+        this._fxTickTimer = nowMs;
+        const pitch = 0.7 + this.T * 0.9;
+        LabFX.sound.play('tick', { pitch: Math.min(2.5, pitch), volume: 0.12 });
+      }
+    }
   }
 
   setN(n) {
@@ -110,8 +121,11 @@ class StatesSim {
   stop()  { cancelAnimationFrame(this._raf); this._raf = null; }
 
   // ── simulation ────────────────────────────────────────────────────────────
-  _loop() {
+  _loop(now) {
+    const dt = this._fxLastT ? Math.min(now - this._fxLastT, 80) : 16;
+    this._fxLastT = now;
     for (let i = 0; i < 5; i++) this._stepPhysics();
+    if (window.LabFX) LabFX.particles.update(dt);
     this.draw();
     this._raf = requestAnimationFrame(this._loop);
   }
@@ -391,6 +405,7 @@ class StatesSim {
 
     // hover inspector (may extend into chart area)
     if (this._hover) this._drawInspector(ctx, this._hover, speeds, maxSpd, W, H);
+    if (window.LabFX) LabFX.particles.draw(ctx);
   }
 
   // ── helpers ───────────────────────────────────────────────────────────────