feat: implement cross-linking backlink network

Author: abusufyan-netizen

src/partials/footer.html

@@ -2,10 +2,18 @@
         <div style="display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 40px; max-width: 1000px; margin: 0 auto;">
             <div>
                 <h4>SeveranceCalculator.xyz</h4>
-                <p>Professional global financial tools powered by <a href="https://wtkpro.site" target="_blank"
-                        rel="noopener noreferrer" aria-label="Visit WebToolkit Pro - 150+ Premium Tools" style="color:white; font-weight:600;">WebToolkit Pro (150+ Tools)</a>.</p>
-                <p style="margin-top: 10px; font-size: 13px;"><a href="https://tradeconvert.pro" target="_blank"
-                        rel="noopener noreferrer" aria-label="Visit TradeConvert - NIST Verified Units" style="color:white; opacity:0.8; text-decoration:none;">TradeConvert (NIST Verified)</a></p>
+                <p style="font-size: 13px; opacity: 0.8; margin-bottom: 8px; color: #8A9BBE;">Professional global financial tools.</p>
+                <p style="font-size: 12px; opacity: 0.7; margin-bottom: 4px; color: #4A6080; font-weight: bold; text-transform: uppercase;">Our Network:</p>
+                <ul style="list-style: none; padding: 0; margin: 0; font-size: 12px; line-height: 1.6;">
+                    <li><a href="https://wtkpro.site" target="_blank" rel="noopener noreferrer" style="color:white; opacity:0.8; text-decoration:none;">WebToolkit Pro</a></li>
+                    <li><a href="https://tradeconvert.pro" target="_blank" rel="noopener noreferrer" style="color:white; opacity:0.8; text-decoration:none;">TradeConvert</a></li>
+                    <li><a href="https://abusufyan.xyz" target="_blank" rel="noopener" style="color:white; opacity:0.8; text-decoration:none;">Abu Sufyan Portfolio</a></li>
+                    <li><a href="https://netizenlabs.online" target="_blank" rel="noopener noreferrer" style="color:white; opacity:0.8; text-decoration:none;">Netizen Labs</a></li>
+                    <li><a href="https://getstudynova.online" target="_blank" rel="noopener noreferrer" style="color:white; opacity:0.8; text-decoration:none;">StudyNova</a></li>
+                    <li><a href="https://quranhub.xyz" target="_blank" rel="noopener noreferrer" style="color:white; opacity:0.8; text-decoration:none;">QuranHub</a></li>
+                    <li><a href="https://slabreachcalculator.site" target="_blank" rel="noopener noreferrer" style="color:white; opacity:0.8; text-decoration:none;">SLA Breach Calc</a></li>
+                    <li><a href="https://taxforfreelancers.online" target="_blank" rel="noopener noreferrer" style="color:white; opacity:0.8; text-decoration:none;">Freelance Tax Calc</a></li>
+                </ul>
             </div>
             <div>
                 <h4>top calculators</h4>