feat: Embed official Saqel Logo across all navbars and footers, setup browser favicons, and integrate StitchMCP design pipeline

backend/app/Views/StudentPortal.php

@@ -13,6 +13,8 @@ class StudentPortal
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>بوابة الطالب — منصة صَقِل التعليمية</title>
+    <link rel="icon" type="image/jpeg" href="/assets/images/saqel_logo.jpg">
+    <link rel="apple-touch-icon" href="/assets/images/saqel_logo.jpg">
     <!-- Apple SF Pro & Alexandria Arabic Web Fonts -->
     <link rel="preconnect" href="https://fonts.googleapis.com">
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
@@ -247,7 +249,7 @@ class StudentPortal
         <div class="container">
             <div class="header-content">
                 <a href="/student" class="logo-area">
-                    <div class="logo-badge">صـ</div>
+                    <img src="/assets/images/saqel_logo.jpg" alt="صَقِل" style="width: 38px; height: 38px; border-radius: 10px; object-fit: cover; box-shadow: 0 0 16px rgba(0, 245, 212, 0.35); border: 1px solid rgba(255, 255, 255, 0.15);">
                     <div>
                         <span class="brand-title">صَقِل</span>
                         <span class="portal-pill">بوابة الطالب الذكية</span>