feat: add window component with traffic lights and framer-motion

src/components/Window/Window.css

@@ -0,0 +1,86 @@
+.window {
+  background: var(--glass-bg);
+  backdrop-filter: var(--glass-blur);
+  -webkit-backdrop-filter: var(--glass-blur);
+  border: 1px solid var(--glass-border);
+  border-radius: var(--radius-window);
+  box-shadow: var(--glass-shadow);
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+  transition: opacity 0.15s;
+}
+
+.window--unfocused {
+  opacity: 0.72;
+}
+
+.window-titlebar {
+  height: var(--titlebar-height);
+  display: flex;
+  align-items: center;
+  padding: 0 12px;
+  cursor: move;
+  border-bottom: 1px solid var(--glass-border);
+  flex-shrink: 0;
+  gap: 8px;
+  position: relative;
+}
+
+.traffic-lights {
+  display: flex;
+  gap: 6px;
+  flex-shrink: 0;
+}
+
+.traffic-light {
+  width: 12px;
+  height: 12px;
+  border-radius: 50%;
+  border: none;
+  cursor: pointer;
+  position: relative;
+  transition: filter 0.1s;
+}
+
+.window--unfocused .traffic-light {
+  background: #666 !important;
+}
+
+.traffic-light--close { background: var(--accent-red); }
+.traffic-light--minimize { background: var(--accent-yellow); }
+.traffic-light--maximize { background: var(--accent-green); }
+
+.traffic-lights:hover .traffic-light--close::after { content: '✕'; }
+.traffic-lights:hover .traffic-light--minimize::after { content: '−'; }
+.traffic-lights:hover .traffic-light--maximize::after { content: '+'; }
+
+.traffic-light::after {
+  position: absolute;
+  inset: 0;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 8px;
+  font-weight: 700;
+  color: rgba(0,0,0,0.6);
+  line-height: 1;
+}
+
+.window-title {
+  flex: 1;
+  text-align: center;
+  font-size: 13px;
+  font-weight: 500;
+  color: rgba(255,255,255,0.85);
+  pointer-events: none;
+  position: absolute;
+  left: 50%;
+  transform: translateX(-50%);
+}
+
+.window-content {
+  flex: 1;
+  overflow: auto;
+  color: #fff;
+}

src/components/Window/Window.tsx

@@ -0,0 +1,75 @@
+import { Rnd } from 'react-rnd';
+import { motion, AnimatePresence } from 'framer-motion';
+import { useOS } from '../../context/WindowContext';
+import type { AppConfig } from '../../types';
+import './Window.css';
+
+interface Props {
+  app: AppConfig;
+}
+
+export default function Window({ app }: Props) {
+  const { state, closeWindow, minimizeWindow, maximizeWindow, focusWindow, moveWindow, resizeWindow } = useOS();
+  const win = state.windows[app.id];
+  const isFocused = win.zIndex === state.topZ;
+  const isVisible = win.isOpen && !win.isMinimized;
+
+  return (
+    <AnimatePresence>
+      {isVisible && (
+        <motion.div
+          key={app.id}
+          style={{ position: 'fixed', zIndex: win.zIndex, top: 0, left: 0, width: 0, height: 0 }}
+          initial={{ opacity: 0, scale: 0.92 }}
+          animate={{ opacity: 1, scale: 1 }}
+          exit={{ opacity: 0, scale: 0.92 }}
+          transition={{ duration: 0.18, ease: 'easeOut' }}
+        >
+          <Rnd
+            position={win.position}
+            size={win.size}
+            onDragStop={(_, d) => moveWindow(app.id, d.x, d.y)}
+            onResizeStop={(_, __, ref, ___, pos) => {
+              resizeWindow(app.id, ref.offsetWidth, ref.offsetHeight);
+              moveWindow(app.id, pos.x, pos.y);
+            }}
+            dragHandleClassName="window-titlebar"
+            minWidth={280}
+            minHeight={200}
+            bounds="window"
+            onMouseDown={() => focusWindow(app.id)}
+          >
+            <div
+              className={`window ${isFocused ? 'window--focused' : 'window--unfocused'}`}
+              style={{ width: '100%', height: '100%' }}
+            >
+              <div className="window-titlebar">
+                <div className="traffic-lights">
+                  <button
+                    className="traffic-light traffic-light--close"
+                    onClick={() => closeWindow(app.id)}
+                    title="Close"
+                  />
+                  <button
+                    className="traffic-light traffic-light--minimize"
+                    onClick={() => minimizeWindow(app.id)}
+                    title="Minimize"
+                  />
+                  <button
+                    className="traffic-light traffic-light--maximize"
+                    onClick={() => maximizeWindow(app.id, window.innerWidth, window.innerHeight)}
+                    title="Maximize"
+                  />
+                </div>
+                <span className="window-title">{app.title}</span>
+              </div>
+              <div className="window-content">
+                <app.component />
+              </div>
+            </div>
+          </Rnd>
+        </motion.div>
+      )}
+    </AnimatePresence>
+  );
+}