diff --git a/public/js/app-paint.js b/public/js/app-paint.js
new file mode 100644
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--- /dev/null
+++ b/public/js/app-paint.js
@@ -0,0 +1,222 @@
+/* ============================================================
+   AURA OS — Uygulama C: Neon Paint
+   HTML5 Canvas serbest çizim, 4 neon renk, temizle
+   ============================================================ */
+
+const PaintAppState = {};
+
+function paintBuildContent() {
+  const tpl = document.getElementById('tpl-paint');
+  if (tpl && tpl.content) {
+    return document.importNode(tpl.content, true).firstElementChild.innerHTML;
+  }
+  return [
+    '<div class="paint-app">',
+    '  <div class="paint-toolbar">',
+    '    <div class="paint-tools">',
+    '      <button class="color-btn active" data-color="#00ffcc" style="background:#00ffcc"></button>',
+    '      <button class="color-btn" data-color="#ff00ff" style="background:#ff00ff"></button>',
+    '      <button class="color-btn" data-color="#39ff14" style="background:#39ff14"></button>',
+    '      <button class="color-btn" data-color="#ffaa00" style="background:#ffaa00"></button>',
+    '    </div>',
+    '    <button class="paint-clear-btn">🧹 Tuvali Temizle</button>',
+    '  </div>',
+    '  <div class="paint-canvas-wrap"><canvas class="paint-canvas" width="760" height="440"></canvas></div>',
+    '</div>'
+  ].join('');
+}
+
+/* Canvas çizim motoru */
+function initPaintCanvas(bodyEl, canvas) {
+  const ctx = canvas.getContext('2d');
+
+  // Neon efekt için ikinci "glow" offscreen canvas
+  const glowCanvas = document.createElement('canvas');
+  glowCanvas.width = canvas.width;
+  glowCanvas.height = canvas.height;
+  const glowCtx = glowCanvas.getContext('2d');
+  glowCanvas.style.display = 'none';
+  bodyEl.appendChild(glowCanvas);
+
+  // Durum
+  const state = {
+    drawing: false,
+    color: '#00ffcc',
+    lastX: 0,
+    lastY: 0,
+    lineWidth: 4,
+    erasing: false,
+  };
+
+  // Canvas içindeki noktayı hesapla (konumlandırma)
+  function getPos(e) {
+    const r = canvas.getBoundingClientRect();
+    const cx = canvas.width / r.width;  // ölçekleme
+    const cy = canvas.height / r.height;
+    let clientX, clientY;
+    if (e.touches && e.touches.length) {
+      clientX = e.touches[0].clientX;
+      clientY = e.touches[0].clientY;
+    } else {
+      clientX = e.clientX;
+      clientY = e.clientY;
+    }
+    return {
+      x: (clientX - r.left) * cx,
+      y: (clientY - r.top) * cy,
+    };
+  }
+
+  /* Neon ışık saçılımı: çizgiyi birden çok katman çiziyoruz */
+  function neonStroke(x0, y0, x1, y1, color, width, erase) {
+    if (erase) {
+      // Silgi modu: ikisini de sil (normal ctx)
+      ctx.save();
+      ctx.globalCompositeOperation = 'destination-out';
+      ctx.strokeStyle = 'rgba(0,0,0,1)';
+      ctx.lineWidth = width;
+      ctx.lineCap = 'round';
+      ctx.lineJoin = 'round';
+      ctx.beginPath();
+      ctx.moveTo(x0, y0);
+      ctx.lineTo(x1, y1);
+      ctx.stroke();
+      ctx.restore();
+      return;
+    }
+
+    // 1) Glow offscreen katmanı (geniş + düşük opaklık, blur ile bakılır)
+    glowCtx.save();
+    glowCtx.globalCompositeOperation = 'lighter';
+    glowCtx.strokeStyle = color;
+    glowCtx.shadowColor = color;
+    glowCtx.shadowBlur = 18;
+    glowCtx.lineWidth = width * 2.2;
+    glowCtx.lineCap = 'round';
+    glowCtx.lineJoin = 'round';
+    glowCtx.beginPath();
+    glowCtx.moveTo(x0, y0);
+    glowCtx.lineTo(x1, y1);
+    glowCtx.stroke();
+    glowCtx.restore();
+
+    // 2) Ana çizgiyi koyu neon tonda
+    glowCtx.save();
+    glowCtx.strokeStyle = color;
+    glowCtx.shadowBlur = 6;
+    glowCtx.lineWidth = width;
+    glowCtx.lineCap = 'round';
+    glowCtx.beginPath();
+    glowCtx.moveTo(x0, y0);
+    glowCtx.lineTo(x1, y1);
+    glowCtx.stroke();
+    glowCtx.restore();
+
+    // 3) Parlak merkez
+    glowCtx.save();
+    glowCtx.globalCompositeOperation = 'lighter';
+    glowCtx.strokeStyle = 'rgba(255,255,255,0.7)';
+    glowCtx.lineWidth = Math.max(1, width * 0.35);
+    glowCtx.lineCap = 'round';
+    glowCtx.beginPath();
+    glowCtx.moveTo(x0, y0);
+    glowCtx.lineTo(x1, y1);
+    glowCtx.stroke();
+    glowCtx.restore();
+
+    // 4) Glow canvas'ı ana canvas'a aktar
+    ctx.clearRect(0, 0, canvas.width, canvas.height);
+    ctx.drawImage(glowCanvas, 0, 0);
+  }
+
+  /* ---- Olaylar ---- */
+  function pointerDown(e) {
+    e.preventDefault();
+    const p = getPos(e);
+    state.drawing = true;
+    state.lastX = p.x;
+    state.lastY = p.y;
+    // nokta
+    neonStroke(p.x, p.y, p.x + 0.2, p.y + 0.2, state.color, state.lineWidth, state.erasing);
+  }
+
+  function pointerMove(e) {
+    if (!state.drawing) return;
+    e.preventDefault();
+    const p = getPos(e);
+    neonStroke(state.lastX, state.lastY, p.x, p.y, state.color, state.lineWidth, state.erasing);
+    state.lastX = p.x;
+    state.lastY = p.y;
+  }
+
+  function pointerEnd(e) {
+    state.drawing = false;
+  }
+
+  // Fare
+  canvas.addEventListener('mousedown', pointerDown);
+  window.addEventListener('mousemove', pointerMove);
+  window.addEventListener('mouseup', pointerEnd);
+
+  // Dokunmatik
+  canvas.addEventListener('touchstart', pointerDown, { passive: false });
+  canvas.addEventListener('touchmove', pointerMove, { passive: false });
+  canvas.addEventListener('touchend', pointerEnd);
+
+  // Sağ lob fare: silgi modu (contextmenu bastır)
+  canvas.addEventListener('contextmenu', (e) => e.preventDefault());
+
+  // Renk seçim butonları
+  const colorBtns = bodyEl.querySelectorAll('.color-btn');
+  colorBtns.forEach(btn => {
+    btn.addEventListener('click', () => {
+      state.color = btn.dataset.color;
+      state.erasing = false;
+      colorBtns.forEach(b => b.classList.remove('active'));
+      btn.classList.add('active');
+      // canvas imleci rengi
+      canvas.style.cursor = 'crosshair';
+    });
+  });
+
+  // Temizle butonu
+  const clearBtn = bodyEl.querySelector('.paint-clear-btn');
+  if (clearBtn) {
+    clearBtn.addEventListener('click', () => {
+      ctx.clearRect(0, 0, canvas.width, canvas.height);
+      glowCtx.clearRect(0, 0, glowCanvas.width, glowCanvas.height);
+    });
+  }
+
+  // Initial draw: boş arka planı
+  ctx.fillStyle = '#05060f';
+  ctx.fillRect(0, 0, canvas.width, canvas.height);
+  glowCtx.fillStyle = '#05060f';
+  glowCtx.fillRect(0, 0, canvas.width, canvas.height);
+
+  // Shift silgiyi keskinleştir — imleç css
+  state.color = '#00ffcc';
+  canvas.style.cursor = 'crosshair';
+
+  return state;
+}
+
+registerApp('paint', {
+  name: 'Neon Paint',
+  icon: '🎨',
+  defaultWidth: 780,
+  defaultHeight: 520,
+  windowTitle: 'Neon Paint — Aura OS',
+  windowProps: { width: 780, height: 520 },
+
+  buildContent: paintBuildContent,
+
+  onLaunch(record, bodyEl) {
+    bodyEl.innerHTML = paintBuildContent();
+
+    const canvas = bodyEl.querySelector('.paint-canvas');
+    if (!canvas) return;
+
+    initPaintCanvas(bodyEl, canvas);
+  },
+});