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/radioactive.js

@@ -120,6 +120,8 @@ class RadioactiveSim {
     );
     this.simTime = 0;
     this.history = [];
+    this._lastHalfLifeMark = 0;
+    this._fxDecayCount = 0;
   }
 
   /* ══════════════ public API ══════════════ */
@@ -265,6 +267,16 @@ class RadioactiveSim {
                   : decayType.startsWith('β') ? 'β'
                   : 'γ';
         this._flashes.push({ x: p.x, y: p.y, t: 0, maxT: 0.35, sym });
+        // LabFX decay effects (throttled)
+        if (window.LabFX) {
+          this._fxFrameDecays = (this._fxFrameDecays || 0) + 1;
+          LabFX.particles.emit({
+            ctx: this.ctx, x: p.x, y: p.y,
+            count: 6, color: '#FFD700', speed: 60,
+            spread: Math.PI * 2, angle: 0, gravity: 0,
+            life: 300, shape: 'spark', glow: true, size: 2,
+          });
+        }
       }
 
       // age flash on particle itself
@@ -284,6 +296,32 @@ class RadioactiveSim {
 
     this.simTime += dt;
 
+    // LabFX half-life crossing + throttled tick sound
+    if (window.LabFX) {
+      /* throttle tick: play at most once per frame, only if ≤10 decays/s effective */
+      const frameDecays = this._fxFrameDecays || 0;
+      this._fxFrameDecays = 0;
+      if (frameDecays > 0) {
+        const decaysPerSec = frameDecays / Math.max(wallDt, 0.001);
+        const N = Math.max(1, Math.round(decaysPerSec / 10));
+        if (Math.random() < 1 / N) {
+          LabFX.sound.play('tick', { pitch: 0.8 + Math.random() * 0.4, volume: 0.08 });
+        }
+      }
+      LabFX.particles.update(wallDt);
+      const T0 = this.steps[0].T_half;
+      if (T0 !== Infinity) {
+        const halfLifesElapsed = Math.floor(this.simTime / T0);
+        if (halfLifesElapsed > (this._lastHalfLifeMark || 0)) {
+          this._lastHalfLifeMark = halfLifesElapsed;
+          LabFX.sound.play('chime', {
+            pitch: 0.6 + halfLifesElapsed * 0.1,
+            volume: 0.3,
+          });
+        }
+      }
+    }
+
     // record history every ~2 ticks (≈30ms)
     const last = this.history[this.history.length - 1];
     if (!last || this.simTime - last.t > this.steps[0].T_half * 0.005 || this.history.length < 5) {
@@ -342,11 +380,23 @@ class RadioactiveSim {
       ctx.fillStyle = `rgba(255,255,200,${alpha * 0.45})`;
       ctx.fill();
 
-      ctx.font = `bold ${Math.round(8 + alpha * 4)}px Manrope,sans-serif`;
-      ctx.fillStyle = `rgba(255,255,180,${alpha})`;
+      const symSize = Math.round(8 + alpha * 4);
+      ctx.font = `bold ${symSize}px Manrope,sans-serif`;
+      const symColor = `rgba(255,255,180,${alpha})`;
+      ctx.fillStyle = symColor;
       ctx.textAlign = 'center';
       ctx.textBaseline = 'middle';
-      ctx.fillText(fl.sym, fl.x, fl.y - r - 4);
+      if (window.LabFX) {
+        LabFX.glow.drawGlow(ctx, () => {
+          ctx.font = `bold ${symSize}px Manrope,sans-serif`;
+          ctx.fillStyle = symColor;
+          ctx.textAlign = 'center';
+          ctx.textBaseline = 'middle';
+          ctx.fillText(fl.sym, fl.x, fl.y - r - 4);
+        }, { color: '#FFFFFF', intensity: 6 });
+      } else {
+        ctx.fillText(fl.sym, fl.x, fl.y - r - 4);
+      }
     }
 
     // draw particles
@@ -374,6 +424,8 @@ class RadioactiveSim {
       ctx.fillStyle = 'rgba(255,255,255,0.75)';
       ctx.fillText(s.name, lx + 15, y);
     }
+
+    if (window.LabFX) LabFX.particles.draw(ctx);
   }
 
   _drawGraph() {
@@ -549,6 +601,7 @@ function radioactiveN0(val) {
 
 function radioactivePlay() {
   if (!radioactiveSim) return;
+  if (window.LabFX) LabFX.sound.play('click');
   if (radioactiveSim.playing) {
     radioactiveSim.pause();
     document.getElementById('rd-play-btn').textContent = 'Старт';
@@ -560,6 +613,9 @@ function radioactivePlay() {
 
 function radioactiveReset() {
   if (!radioactiveSim) return;
+  if (window.LabFX) LabFX.sound.play('whoosh', { pitch: 0.5, volume: 0.3 });
+  radioactiveSim._lastHalfLifeMark = 0;
+  radioactiveSim._fxDecayCount = 0;
   radioactiveSim.reset();
   document.getElementById('rd-play-btn').textContent = 'Старт';
 }