feat(dashboard): add animated diamond background to login page

dashboard/src/components/auth/DiamondBg.vue

@@ -0,0 +1,136 @@
+<template>
+  <div class="diamond-bg">
+    <canvas ref="canvas"></canvas>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { onMounted, onUnmounted, ref } from "vue";
+
+const canvas = ref<HTMLCanvasElement | null>(null);
+let animationId: number | null = null;
+
+interface Diamond {
+  x: number;
+  y: number;
+  size: number;
+  phase: number;
+  speed: number;
+}
+
+const createDiamonds = (w: number, h: number): Diamond[] => {
+  const diamonds: Diamond[] = [];
+  const spacing = 48;
+  const cols = Math.ceil(w / spacing) + 2;
+  const rows = Math.ceil(h / spacing) + 2;
+
+  for (let i = 0; i < cols; i++) {
+    for (let j = 0; j < rows; j++) {
+      const offset = (j % 2) * (spacing / 2);
+      diamonds.push({
+        x: i * spacing + offset,
+        y: j * spacing * 0.75,
+        size: 8 + Math.random() * 6,
+        phase: (i + j * 0.5) * 0.8,
+        speed: 0.4 + Math.random() * 0.3,
+      });
+    }
+  }
+  return diamonds;
+};
+
+const drawDiamond = (
+  ctx: CanvasRenderingContext2D,
+  x: number,
+  y: number,
+  size: number,
+  alpha: number,
+  raised: boolean
+) => {
+  const d = size / 2;
+  const depth = raised ? 0 : size * 0.25;
+
+  // Main body
+  ctx.beginPath();
+  ctx.moveTo(x, y - d + depth);
+  ctx.lineTo(x + d + depth, y);
+  ctx.lineTo(x, y + d - depth);
+  ctx.lineTo(x - d - depth, y);
+  ctx.closePath();
+
+  // Fill with subtle gradient
+  const grad = ctx.createLinearGradient(x - d, y - d, x + d, y + d);
+  if (raised) {
+    grad.addColorStop(0, `rgba(147, 197, 253, ${alpha})`);
+    grad.addColorStop(1, `rgba(59, 130, 246, ${alpha * 0.8})`);
+  } else {
+    grad.addColorStop(0, `rgba(30, 64, 175, ${alpha * 0.6})`);
+    grad.addColorStop(1, `rgba(30, 58, 138, ${alpha * 0.4})`);
+  }
+  ctx.fillStyle = grad;
+  ctx.fill();
+
+  // Top edge highlight
+  ctx.strokeStyle = `rgba(255, 255, 255, ${alpha * (raised ? 0.5 : 0.2)})`;
+  ctx.lineWidth = 0.8;
+  ctx.beginPath();
+  ctx.moveTo(x - d + depth, y);
+  ctx.lineTo(x, y - d + depth);
+  ctx.lineTo(x + d + depth, y);
+  ctx.stroke();
+};
+
+onMounted(() => {
+  if (!canvas.value) return;
+  const ctx = canvas.value.getContext("2d");
+  if (!ctx) return;
+
+  let diamonds: Diamond[] = [];
+  let t = 0;
+
+  const resize = () => {
+    if (!canvas.value) return;
+    canvas.value.width = window.innerWidth;
+    canvas.value.height = window.innerHeight;
+    diamonds = createDiamonds(canvas.value.width, canvas.value.height);
+  };
+
+  const animate = () => {
+    if (!canvas.value || !ctx) return;
+    ctx.clearRect(0, 0, canvas.value.width, canvas.value.height);
+    t += 0.015;
+
+    diamonds.forEach((d) => {
+      const floatY = Math.sin(t * d.speed + d.phase) * 5;
+      const raised = Math.sin(t * d.speed + d.phase) > 0;
+      const alpha = 0.25 + Math.abs(Math.sin(t * d.speed + d.phase)) * 0.35;
+      drawDiamond(ctx, d.x, d.y + floatY, d.size, alpha, raised);
+    });
+
+    animationId = requestAnimationFrame(animate);
+  };
+
+  resize();
+  animate();
+  window.addEventListener("resize", resize);
+});
+
+onUnmounted(() => {
+  if (animationId !== null) cancelAnimationFrame(animationId);
+});
+</script>
+
+<style scoped>
+.diamond-bg {
+  position: fixed;
+  inset: 0;
+  z-index: 0;
+  background: linear-gradient(145deg, #0c1322 0%, #1a2744 40%, #0c1322 100%);
+}
+
+canvas {
+  display: block;
+  width: 100%;
+  height: 100%;
+}
+</style>

dashboard/src/views/authentication/auth/LoginPage.vue

@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import AuthLogin from "../authForms/AuthLogin.vue";
 import DailyQuote from "@/components/shared/DailyQuote.vue";
+import DiamondBg from "@/components/auth/DiamondBg.vue";
 import LanguageSwitcher from "@/components/shared/LanguageSwitcher.vue";
 import { onMounted, ref } from "vue";
 import { useAuthStore } from "@/stores/auth";
@@ -113,6 +114,7 @@ onMounted(() => {
 
 <template>
   <div class="login-page-container">
+    <DiamondBg />
     <v-card class="login-card" elevation="1">
       <v-card-title>
         <div class="d-flex justify-space-between align-center w-100">
@@ -314,5 +316,8 @@ onMounted(() => {
 .login-card {
   width: 400px;
   padding: 8px;
+  background: rgba(30, 41, 59, 0.85) !important;
+  backdrop-filter: blur(12px);
+  border: 1px solid rgba(255, 255, 255, 0.1);
 }
 </style>