added background

src/app/components/dot-background/dot-background.ts

@@ -0,0 +1,131 @@
+import {afterNextRender, AfterViewInit, Component, ElementRef, NgZone, OnDestroy, ViewChild} from '@angular/core';
+import {Dot} from '../../models/dot';
+
+@Component({
+  selector: 'app-dot-background',
+  imports: [],
+  templateUrl: './dot-background.html',
+  styleUrl: './dot-background.scss',
+})
+export class DotBackground implements OnDestroy {
+  @ViewChild('canvas') canvasRef!: ElementRef<HTMLCanvasElement>;
+
+  private ctx!: CanvasRenderingContext2D;
+  private dots: Dot[] = [];
+  private mouse = { x: -1000, y: -1000 };
+  private animationId = 0;
+  private initialized = false;
+
+  private readonly DOT_COUNT = 12;
+  private readonly COLORS = ['#6366f1', '#8b5cf6', '#a855f7', '#3b82f6'];
+  private readonly MOUSE_RADIUS = 150;
+
+  constructor(private ngZone: NgZone) {
+    afterNextRender(() => {
+      this.init();
+    });
+  }
+
+  ngOnDestroy() {
+    if (!this.initialized) return;
+
+    cancelAnimationFrame(this.animationId);
+    window.removeEventListener('resize', this.resize);
+    window.removeEventListener('mousemove', this.onMouseMove);
+  }
+
+  private init() {
+    const canvas = this.canvasRef.nativeElement;
+    this.ctx = canvas.getContext('2d')!;
+    this.resize();
+    this.initDots();
+
+    window.addEventListener('resize', this.resize);
+    window.addEventListener('mousemove', this.onMouseMove);
+
+    this.initialized = true;
+    this.ngZone.runOutsideAngular(() => this.animate());
+  }
+
+  private resize = () => {
+    const canvas = this.canvasRef.nativeElement;
+    canvas.width = window.innerWidth;
+    canvas.height = window.innerHeight;
+
+    // Clamp dots to new bounds
+    for (const dot of this.dots) {
+      dot.x = Math.min(dot.x, canvas.width - dot.radius);
+      dot.y = Math.min(dot.y, canvas.height - dot.radius);
+      dot.x = Math.max(dot.x, dot.radius);
+      dot.y = Math.max(dot.y, dot.radius);
+    }
+  };
+
+  private onMouseMove = (e: MouseEvent) => {
+    this.mouse.x = e.clientX;
+    this.mouse.y = e.clientY;
+  };
+
+  private initDots() {
+    const { width, height } = this.canvasRef.nativeElement;
+    for (let i = 0; i < this.DOT_COUNT; i++) {
+      this.dots.push({
+        x: Math.random() * width,
+        y: Math.random() * height,
+        vx: (Math.random() - 0.5) * 0.5,
+        vy: (Math.random() - 0.5) * 0.5,
+        radius: Math.random() * 60 + 40,
+        color: this.COLORS[i % this.COLORS.length],
+      });
+    }
+  }
+
+  private animate = () => {
+    const canvas = this.canvasRef.nativeElement;
+    const { width, height } = canvas;
+    this.ctx.clearRect(0, 0, width, height);
+
+    for (const dot of this.dots) {
+      const dx = dot.x - this.mouse.x;
+      const dy = dot.y - this.mouse.y;
+      const dist = Math.sqrt(dx * dx + dy * dy);
+
+      if (dist < this.MOUSE_RADIUS) {
+        const force = (this.MOUSE_RADIUS - dist) / this.MOUSE_RADIUS;
+        dot.vx += (dx / dist) * force * 0.5;
+        dot.vy += (dy / dist) * force * 0.5;
+      }
+
+      dot.x += dot.vx;
+      dot.y += dot.vy;
+
+      const speed = Math.sqrt(dot.vx * dot.vx + dot.vy * dot.vy);
+      if (speed > 0.3) {
+        dot.vx *= 0.98;
+        dot.vy *= 0.98;
+      }
+
+      // Bounce off edges (accounting for radius)
+      if (dot.x < dot.radius || dot.x > width - dot.radius) dot.vx *= -1;
+      if (dot.y < dot.radius || dot.y > height - dot.radius) dot.vy *= -1;
+
+      // Clamp to bounds
+      dot.x = Math.max(dot.radius, Math.min(width - dot.radius, dot.x));
+      dot.y = Math.max(dot.radius, Math.min(height - dot.radius, dot.y));
+
+      const gradient = this.ctx.createRadialGradient(
+        dot.x, dot.y, 0,
+        dot.x, dot.y, dot.radius
+      );
+      gradient.addColorStop(0, dot.color + '40');
+      gradient.addColorStop(1, 'transparent');
+
+      this.ctx.beginPath();
+      this.ctx.arc(dot.x, dot.y, dot.radius, 0, Math.PI * 2);
+      this.ctx.fillStyle = gradient;
+      this.ctx.fill();
+    }
+
+    this.animationId = requestAnimationFrame(this.animate);
+  };
+}