feat(admin): remove version checker and new version alerts

.github/copilot-instructions.md

@@ -197,7 +197,6 @@ All located in `admin/api/`:
 - **salas_search.php** - Room search/autocomplete
 - **users_search.php** - User search/autocomplete
 - **tempos_search.php** - Time slot search
-- **version_check.php** - Version checking
 
 ## Reservation Workflow
 1. User selects room(s) and time slot(s) on `/reservar`

admin/index.php

@@ -233,102 +233,5 @@ function acaoexecutada($acao) {
         }    
 ?>
 
-<?php if ($_SERVER['REQUEST_URI'] == "/admin/"): ?>
-<!-- Version Alert Container at Bottom - Only on Dashboard -->
-<div id='versionAlertContainer' style='margin-top: 20px;'></div>
-
-<script>
-// Version Checker - Checks for new commits on main branch - ONLY ON DASHBOARD
-(function() {
-    function checkVersion() {
-        fetch('/admin/api/version_check.php')
-            .then(response => response.json())
-            .then(data => {
-                if (data.success) {
-                    showVersionAlert(data);
-                } else if (data.error) {
-                    console.warn('Version check error:', data.error);
-                }
-            })
-            .catch(error => {
-                console.error('Version check failed:', error);
-            });
-    }
-
-    function showVersionAlert(data) {
-        const container = document.getElementById('versionAlertContainer');
-        if (!container) return;
-
-        let alertHtml = '';
-        const cacheStatus = data.cached ? ' (cache)' : '';
-
-        if (data.commitsBehind > 0) {
-            // Behind - show warning
-            const plural = data.commitsBehind > 1 ? 'versões' : 'versão';
-            const aheadText = data.commitsAhead > 0 ? ` (${data.commitsAhead} commit${data.commitsAhead > 1 ? 's' : ''} à frente)` : '';
-
-            alertHtml = `
-                <div class="alert alert-warning text-center" role="alert">
-                    <strong>⚠️ Está a correr uma versão desatualizada do ClassLink.</strong> 
-                    Está atrasado <strong>${data.commitsBehind}</strong> ${plural}${aheadText}.
-                    <button type="button" class="btn btn-sm btn-outline-warning ms-3" data-bs-toggle="collapse" data-bs-target="#versionDetails">
-                        Ver Detalhes
-                    </button>
-                    <div class="collapse mt-2" id="versionDetails">
-                        <small class="d-block">
-                            <strong>Último commit:</strong> ${escapeHtml(data.lastCommitMessage)}<br>
-                            <strong>Autor:</strong> ${escapeHtml(data.lastCommitAuthor)}<br>
-                            <strong>Data:</strong> ${formatDate(data.lastCommitDate)}<br>
-                            <strong>Hash:</strong> ${data.currentCommit} → ${data.remoteCommit}
-                        </small>
-                    </div>
-                </div>
-            `;
-        } else {
-            // Up to date - show success
-            alertHtml = `
-                <div class="alert alert-success text-center" role="alert">
-                    <strong>✅ Está a correr uma versão atualizada do ClassLink!</strong>
-                    <small class="d-block mt-1 text-muted">
-                        Última verificação: ${formatDate(data.timestamp)}${cacheStatus}
-                    </small>
-                </div>
-            `;
-        }
-
-        container.innerHTML = alertHtml;
-    }
-
-    function escapeHtml(text) {
-        const div = document.createElement('div');
-        div.textContent = text;
-        return div.innerHTML;
-    }
-
-    function formatDate(dateString) {
-        if (!dateString) return 'N/A';
-        const date = new Date(dateString);
-        return date.toLocaleString('pt-PT', {
-            year: 'numeric',
-            month: '2-digit',
-            day: '2-digit',
-            hour: '2-digit',
-            minute: '2-digit'
-        });
-    }
-
-    // Check version on page load
-    if (document.readyState === 'loading') {
-        document.addEventListener('DOMContentLoaded', checkVersion);
-    } else {
-        checkVersion();
-    }
-
-    // Check version every 15 minutes
-    setInterval(checkVersion, 15 * 60 * 1000);
-})();
-</script>
-<?php endif; ?>
-
 </body>
 </html>