bump to 1.8.4 (versionCode 16) and rebuild APK

Reviewed-on: #79
Reviewed-by: rafaga21 <rafaelminaya20@hotmail.com>

.gitignore

@@ -8,3 +8,5 @@ android/build/
 android/app/build/
 android/local.properties
 config/firebase-service-account.json
+.*
+!.gitignore

.opencode/plans/server-thresholds.md

@@ -0,0 +1,256 @@
+# Plan: Umbrales de notificación por servidor
+
+## Archivos a modificar/crear
+
+### 1. `database/migrations/012_server_thresholds.sql` — CREAR
+
+```sql
+ALTER TABLE `servers`
+  ADD COLUMN `threshold_cpu_warning`  DECIMAL(5,2) DEFAULT 80.00 AFTER `agent_last_seen_at`,
+  ADD COLUMN `threshold_cpu_critical` DECIMAL(5,2) DEFAULT 95.00 AFTER `threshold_cpu_warning`,
+  ADD COLUMN `threshold_ram_warning`  DECIMAL(5,2) DEFAULT 80.00 AFTER `threshold_cpu_critical`,
+  ADD COLUMN `threshold_ram_critical` DECIMAL(5,2) DEFAULT 95.00 AFTER `threshold_ram_warning`,
+  ADD COLUMN `threshold_disk_warning` DECIMAL(5,2) DEFAULT 85.00 AFTER `threshold_disk_warning`,
+  ADD COLUMN `threshold_disk_critical` DECIMAL(5,2) DEFAULT 95.00 AFTER `threshold_disk_critical`;
+```
+
+### 2. `src/Core/Database.php` — MODIFICAR
+
+Agregar método `fetchCol()` después de `fetchAll()`:
+
+```php
+    public function fetchCol(string $sql, array $params = []): array
+    {
+        return $this->query($sql, $params)->fetchAll(\PDO::FETCH_COLUMN);
+    }
+```
+
+### 3. `src/Models/Server.php` — MODIFICAR
+
+Agregar método `getAccessibleUserIds()` antes de `findByAgentKey()`:
+
+```php
+    public function getAccessibleUserIds(int $serverId): array
+    {
+        $direct = $this->db->fetchCol(
+            'SELECT user_id FROM server_user WHERE server_id = ? AND status = \'active\'',
+            [$serverId]
+        );
+
+        $team = $this->db->fetchCol(
+            'SELECT DISTINCT tu.user_id FROM team_user tu
+             JOIN team_server ts ON tu.team_id = ts.team_id
+             WHERE ts.server_id = ? AND tu.status = \'active\' AND ts.status = \'active\'',
+            [$serverId]
+        );
+
+        $owner = $this->db->fetchCol(
+            'SELECT created_by FROM servers WHERE id = ? AND status = \'active\'',
+            [$serverId]
+        );
+
+        return array_unique(array_merge($direct, $team, $owner));
+    }
+```
+
+### 4. `routes/web.php` — MODIFICAR
+
+Agregar después de línea 67 (`/servers/:id/metrics`):
+
+```php
+$router->post('/servers/:id/thresholds', [ServerController::class, 'saveThresholds'], [AuthMiddleware::class, CSRFMiddleware::class]);
+```
+
+### 5. `src/Controllers/ServerController.php` — MODIFICAR
+
+Agregar en `use` imports (si no está ya) + nuevo método después de `metrics()`:
+
+```php
+    public function saveThresholds(int $id): void
+    {
+        $server = $this->requireServerAccess($id, 'manager');
+        $role = $this->serverModel->getUserRole($id, (int) Session::get('user_id'));
+
+        if ($role !== 'owner') {
+            $this->view->json(['success' => false, 'error' => 'Only the server owner can modify notification thresholds.'], 403);
+        }
+
+        $fields = ['cpu_warning', 'cpu_critical', 'ram_warning', 'ram_critical', 'disk_warning', 'disk_critical'];
+        $data = [];
+        foreach ($fields as $f) {
+            $key = 'threshold_' . $f;
+            $data[$key] = isset($_POST[$f]) ? max(0, min(100, (float) $_POST[$f])) : null;
+        }
+
+        $this->serverModel->update($id, $data);
+        $this->auditService->log('thresholds_updated', 'server', $id, $data);
+        $this->view->json(['success' => true, 'message' => 'Notification thresholds updated.']);
+    }
+```
+
+### 6. `src/Controllers/ApiController.php` — MODIFICAR
+
+En `pushMetrics()`, después de `updateAgentLastSeen()` (línea 435) y antes de `$this->view->json(['success' => true])` (línea 437):
+
+```php
+        // --- Verificar umbrales de notificación ---
+        $checks = [
+            'cpu'  => ['val' => $cpu,  'warn' => $server['threshold_cpu_warning'],  'crit' => $server['threshold_cpu_critical']],
+            'ram'  => ['val' => $ram,  'warn' => $server['threshold_ram_warning'],  'crit' => $server['threshold_ram_critical']],
+            'disk' => ['val' => $disk, 'warn' => $server['threshold_disk_warning'], 'crit' => $server['threshold_disk_critical']],
+        ];
+
+        $breaches = [];
+        foreach ($checks as $metric => $c) {
+            if ($c['crit'] !== null && $c['val'] >= (float) $c['crit']) {
+                $breaches[] = ['metric' => $metric, 'level' => 'critical', 'current' => $c['val'], 'threshold' => $c['crit']];
+            } elseif ($c['warn'] !== null && $c['val'] >= (float) $c['warn']) {
+                $breaches[] = ['metric' => $metric, 'level' => 'warning', 'current' => $c['val'], 'threshold' => $c['warn']];
+            }
+        }
+
+        if (!empty($breaches)) {
+            $userIds = $serverModel->getAccessibleUserIds((int) $server['id']);
+            $notificationModel = new \ServerManager\Models\Notification();
+            foreach ($breaches as $b) {
+                $title = strtoupper($b['metric']) . " {$b['level']} on {$server['name']}";
+                $message = "{$server['name']}: {$b['metric']} at {$b['current']}% ({$b['level']} threshold: {$b['threshold']}%)";
+                foreach ($userIds as $uid) {
+                    $notificationModel->create([
+                        'user_id' => (int) $uid,
+                        'title' => $title,
+                        'message' => $message,
+                        'type' => $b['level'],
+                    ]);
+                }
+            }
+        }
+```
+
+Agregar import de Notification en los `use` del ApiController (si no está):
+```php
+use ServerManager\Models\Notification;
+```
+
+### 7. `views/servers/show.php` — MODIFICAR
+
+**a) Botón en Management Actions** (después de línea 272, antes de `<?php endif; ?>`):
+
+```php
+            <?php if ($server_role === 'owner'): ?>
+            <button class="action-card" onclick="showThresholdModal()">
+                <i class="fas fa-bell"></i>
+                <span>Notification Thresholds</span>
+            </button>
+            <?php endif; ?>
+```
+
+**b) Modal** (después del `#agentConfirmModal`, antes de `<form id="csrfForm">`):
+
+```php
+<div id="thresholdModal" class="modal">
+    <div class="modal-dialog">
+        <div class="modal-header">
+            <h3><i class="fas fa-bell"></i> Notification Thresholds</h3>
+            <button type="button" class="modal-close" onclick="closeThresholdModal()">&times;</button>
+        </div>
+        <div class="modal-body">
+            <p class="text-muted" style="margin-bottom:20px">
+                Notifications are sent to all users with access to this server when the agent reports values
+                exceeding these thresholds. Only the server owner can modify them.
+            </p>
+            <form id="thresholdForm" onsubmit="return false">
+                <div class="table-responsive">
+                    <table class="table">
+                        <thead>
+                            <tr>
+                                <th>Resource</th>
+                                <th>Warning (%)</th>
+                                <th>Critical (%)</th>
+                            </tr>
+                        </thead>
+                        <tbody>
+                            <?php foreach (['cpu' => 'CPU', 'ram' => 'RAM', 'disk' => 'Disk'] as $key => $label): ?>
+                            <tr>
+                                <td><strong><?= $label ?></strong></td>
+                                <td>
+                                    <input type="number" name="<?= $key ?>_warning"
+                                           value="<?= htmlspecialchars((string)($server["threshold_{$key}_warning"] ?? 80)) ?>"
+                                           min="0" max="100" step="0.01" class="form-control" style="width:120px">
+                                </td>
+                                <td>
+                                    <input type="number" name="<?= $key ?>_critical"
+                                           value="<?= htmlspecialchars((string)($server["threshold_{$key}_critical"] ?? 95)) ?>"
+                                           min="0" max="100" step="0.01" class="form-control" style="width:120px">
+                                </td>
+                            </tr>
+                            <?php endforeach; ?>
+                        </tbody>
+                    </table>
+                </div>
+            </form>
+        </div>
+        <div class="modal-footer">
+            <button class="btn btn-primary" onclick="saveThresholds()"><i class="fas fa-save"></i> Save</button>
+            <button class="btn btn-secondary" onclick="closeThresholdModal()">Cancel</button>
+        </div>
+    </div>
+</div>
+```
+
+**c) JavaScript** (al final del bloque `<script>`, antes de `</script>`):
+
+```javascript
+function showThresholdModal() {
+    document.getElementById('thresholdModal').style.display = 'flex';
+    document.getElementById('thresholdModal').onclick = function(e) {
+        if (e.target === this) closeThresholdModal();
+    };
+}
+
+function closeThresholdModal() {
+    document.getElementById('thresholdModal').style.display = 'none';
+}
+
+function saveThresholds() {
+    const form = document.getElementById('thresholdForm');
+    const data = new URLSearchParams(new FormData(form));
+    data.append('_csrf_token', getCsrfToken());
+
+    document.querySelector('#thresholdModal .btn-primary').disabled = true;
+
+    fetch('/servers/<?= $server['id'] ?>/thresholds', {
+        method: 'POST',
+        headers: {
+            'Content-Type': 'application/x-www-form-urlencoded',
+            'X-CSRF-Token': getCsrfToken(),
+        },
+        body: data.toString(),
+    })
+    .then(r => r.json())
+    .then(d => {
+        showToast(d.success ? 'success' : 'error', d.message ?? d.error);
+        if (d.success) closeThresholdModal();
+    })
+    .catch(e => showToast('error', 'Request failed: ' + e.message))
+    .finally(() => {
+        document.querySelector('#thresholdModal .btn-primary').disabled = false;
+    });
+}
+```
+
+### 8. Ejecutar migración
+
+```bash
+mysql -u root -p"servermanager2024" servermanager < /var/www/servermanager/database/migrations/012_server_thresholds.sql
+```
+
+### 9. Commit y push
+
+```bash
+git add -A && git commit -m "feat: per-server notification thresholds with alert on agent metrics push" && git push origin feat/fcm-apk-v1.8.2
+```
+
+## Variables de umbral en la vista
+
+Las columnas nuevas (`threshold_cpu_warning`, etc.) viajan automáticamente en `$server` porque `findById()` hace `SELECT *`. No requiere cambios en `ServerController::show()`.

android/app/build.gradle.kts

@@ -13,8 +13,8 @@ android {
         applicationId = "com.devlab.app"
         minSdk = 26
         targetSdk = 37
-        versionCode = 15
-        versionName = "1.8.3"
+        versionCode = 16
+        versionName = "1.8.4"
     }
 
     buildTypes {

android/app/src/main/java/com/devlab/app/data/model/Notification.kt

@@ -8,4 +8,5 @@ data class AppNotification(
     val type: String = "info",
     val is_read: Int = 0,
     val created_at: String = "",
+    val created_at_timestamp: Long = 0,
 )

android/app/src/main/java/com/devlab/app/service/NotificationForegroundService.kt

@@ -99,7 +99,7 @@ class NotificationForegroundService : android.app.Service() {
         if (!response.success) return
 
         val newNotifications = response.data.filter { note ->
-            val noteTime = parseTime(note.created_at)
+            val noteTime = note.created_at_timestamp * 1000L
             noteTime > lastCheck && note.is_read == 0
         }
 
@@ -108,19 +108,7 @@ class NotificationForegroundService : android.app.Service() {
             for (notification in newNotifications) {
                 NotificationHelper.showNotification(this, notification)
             }
-            lastCheck = newNotifications.maxOf { parseTime(it.created_at) }
-        }
-    }
-
-    private fun parseTime(time: String?): Long {
-        if (time == null) return 0L
-        return try {
-            val sdf = java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss", java.util.Locale.US).apply {
-                timeZone = java.util.TimeZone.getTimeZone("UTC")
-            }
-            sdf.parse(time)?.time ?: 0L
-        } catch (_: Exception) {
-            0L
+            lastCheck = newNotifications.maxOf { it.created_at_timestamp * 1000L }
         }
     }
 

android/app/src/main/java/com/devlab/app/ui/notifications/NotificationsScreen.kt

@@ -219,7 +219,7 @@ private fun NotificationItem(
 
                 Row(verticalAlignment = Alignment.CenterVertically) {
                     Text(
-                        text = formatTime(notification.created_at),
+                        text = formatTime(notification.created_at_timestamp * 1000L),
                         style = MaterialTheme.typography.labelSmall,
                         color = Grey500
                     )
@@ -240,27 +240,17 @@ private fun NotificationItem(
     }
 }
 
-private fun formatTime(timestamp: String?): String {
-    if (timestamp == null) return ""
-    return try {
-        val sdf = SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US).apply {
-            timeZone = TimeZone.getTimeZone("UTC")
-        }
-        val date = sdf.parse(timestamp) ?: return timestamp
-        val now = Calendar.getInstance()
-        val then = Calendar.getInstance().apply {
-            this.time = date
-        }
-
-        val diff = now.timeInMillis - then.timeInMillis
-        when {
+private fun formatTime(millis: Long): String {
+    if (millis <= 0) return ""
+    val now = System.currentTimeMillis()
+    val diff = now - millis
+    return when {
         diff < 60_000 -> "Just now"
         diff < 3600_000 -> "${diff / 60_000}m ago"
         diff < 86400_000 -> "${diff / 3600_000}h ago"
         else -> {
-                val out = SimpleDateFormat("MMM d, HH:mm", Locale.US)
-                out.format(date)
+            val sdf = SimpleDateFormat("MMM d, HH:mm", Locale.US)
+            sdf.format(Date(millis))
         }
     }
-    } catch (_: Exception) { timestamp }
 }

android/app/src/main/java/com/devlab/app/util/NotificationHelper.kt

@@ -113,19 +113,8 @@ object NotificationHelper {
                 markReadPendingIntent
             )
             .setAutoCancel(true)
-            .setWhen(parseTime(notification.created_at))
+            .setWhen(if (notification.created_at_timestamp > 0) notification.created_at_timestamp * 1000L else System.currentTimeMillis())
 
         NotificationManagerCompat.from(context).notify(notification.id, built.build())
     }
-
-    private fun parseTime(time: String?): Long {
-        if (time == null) return System.currentTimeMillis()
-        return try {
-            java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss", java.util.Locale.US).apply {
-                timeZone = java.util.TimeZone.getTimeZone("UTC")
-            }.parse(time)?.time ?: System.currentTimeMillis()
-        } catch (_: Exception) {
-            System.currentTimeMillis()
-        }
-    }
 }

android/app/src/main/java/com/devlab/app/util/NotificationPoller.kt

@@ -3,7 +3,6 @@ package com.devlab.app.util
 import android.content.Context
 import android.util.Log
 import com.devlab.app.data.api.RetrofitClient
-import com.devlab.app.data.model.AppNotification
 import kotlinx.coroutines.*
 
 class NotificationPoller(private val context: Context) {
@@ -56,7 +55,7 @@ class NotificationPoller(private val context: Context) {
                     onCountChanged?.invoke(_unreadCount)
 
                     val newNotes = response.data.filter { note ->
-                        val noteTime = parseTime(note.created_at)
+                        val noteTime = note.created_at_timestamp * 1000L
                         noteTime > lastCheck && note.is_read == 0
                     }
 
@@ -65,20 +64,10 @@ class NotificationPoller(private val context: Context) {
                     }
 
                     if (newNotes.isNotEmpty()) {
-                        lastCheck = newNotes.maxOf { parseTime(it.created_at) }
+                        lastCheck = newNotes.maxOf { it.created_at_timestamp * 1000L }
                     }
                 }
             } catch (_: Exception) { }
         }
     }
-
-    private fun parseTime(time: String?): Long {
-        if (time == null) return 0L
-        return try {
-            val sdf = java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss", java.util.Locale.US).apply {
-                timeZone = java.util.TimeZone.getTimeZone("UTC")
-            }
-            sdf.parse(time)?.time ?: 0L
-        } catch (_: Exception) { 0L }
-    }
 }

android/app/src/main/java/com/devlab/app/worker/NotificationWorker.kt

@@ -4,7 +4,6 @@ import android.content.Context
 import android.util.Log
 import androidx.work.*
 import com.devlab.app.data.api.RetrofitClient
-import com.devlab.app.data.model.AppNotification
 import com.devlab.app.util.NotificationHelper
 import com.devlab.app.util.PreferencesManager
 import kotlinx.coroutines.Dispatchers
@@ -40,7 +39,7 @@ class NotificationWorker(
                     Log.d("NotificationWorker", "Got ${response.data.size} notifications, unread: ${response.unread_count}")
 
                     val newNotifications = response.data.filter { note ->
-                        val noteTime = parseTime(note.created_at)
+                        val noteTime = note.created_at_timestamp * 1000L
                         noteTime > lastCheck && note.is_read == 0
                     }
 
@@ -51,7 +50,7 @@ class NotificationWorker(
                     }
 
                     val maxTime = newNotifications.maxOfOrNull {
-                        parseTime(it.created_at)
+                        it.created_at_timestamp * 1000L
                     } ?: now
 
                     prefs.setLastNotificationCheck(
@@ -71,18 +70,6 @@ class NotificationWorker(
         }
     }
 
-    private fun parseTime(time: String?): Long {
-        if (time == null) return 0L
-        return try {
-            val sdf = java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss", java.util.Locale.US).apply {
-                timeZone = java.util.TimeZone.getTimeZone("UTC")
-            }
-            sdf.parse(time)?.time ?: 0L
-        } catch (_: Exception) {
-            0L
-        }
-    }
-
     companion object {
         private const val WORK_NAME = "notification_check"
 

public/assets/css/style.css

@@ -3134,3 +3134,215 @@ textarea.form-input {
     background: var(--bg-hover, #e9ecef);
     border-color: var(--text-muted, #888);
 }
+
+input[type="range"]::-webkit-slider-thumb {
+    -webkit-appearance: none;
+    appearance: none;
+    width: 18px;
+    height: 18px;
+    border-radius: 50%;
+    background: var(--text-primary);
+    border: 2px solid var(--bg-card);
+    box-shadow: 0 1px 4px rgba(0,0,0,0.4);
+    cursor: pointer;
+    transition: transform 0.1s;
+}
+
+input[type="range"]::-webkit-slider-thumb:hover {
+    transform: scale(1.15);
+}
+
+input[type="range"]::-moz-range-thumb {
+    width: 18px;
+    height: 18px;
+    border-radius: 50%;
+    background: var(--text-primary);
+    border: 2px solid var(--bg-card);
+    box-shadow: 0 1px 4px rgba(0,0,0,0.4);
+    cursor: pointer;
+}
+
+input[type="range"]:focus {
+    outline: none;
+}
+
+input[type="range"]::-moz-range-track {
+    height: 6px;
+    border-radius: 3px;
+}
+
+/* ==========================================================================
+   Notification Bell & Modal
+   ========================================================================== */
+
+.notification-btn-wrapper {
+    position: relative;
+    display: inline-flex;
+}
+
+.notification-btn {
+    position: relative;
+}
+
+.notification-badge {
+    position: absolute;
+    top: 2px;
+    right: 2px;
+    min-width: 16px;
+    height: 16px;
+    padding: 0 4px;
+    border-radius: 100px;
+    background: var(--danger);
+    color: #fff;
+    font-size: 0.6rem;
+    font-weight: 700;
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    line-height: 1;
+    box-shadow: 0 0 0 2px var(--bg-secondary);
+    pointer-events: none;
+}
+
+.notif-item {
+    display: flex;
+    align-items: flex-start;
+    gap: 12px;
+    padding: 14px 18px;
+    border-bottom: 1px solid var(--border-color);
+    cursor: pointer;
+    transition: background 0.15s;
+}
+
+.notif-item:hover {
+    background: var(--bg-hover);
+}
+
+.notif-item:last-child {
+    border-bottom: none;
+}
+
+.notif-unread {
+    background: rgba(99, 102, 241, 0.04);
+}
+
+.notif-unread:hover {
+    background: rgba(99, 102, 241, 0.08);
+}
+
+.notif-icon {
+    width: 32px;
+    height: 32px;
+    border-radius: 50%;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    flex-shrink: 0;
+    font-size: 0.85em;
+}
+
+.notif-icon.notif-danger { background: var(--danger-bg); color: var(--danger); }
+.notif-icon.notif-warning { background: var(--warning-bg); color: var(--warning); }
+.notif-icon.notif-info { background: var(--info-bg); color: var(--info); }
+
+.notif-content {
+    flex: 1;
+    min-width: 0;
+}
+
+.notif-title {
+    font-size: 0.88em;
+    font-weight: 600;
+    color: var(--text-primary);
+    margin-bottom: 2px;
+}
+
+.notif-message {
+    font-size: 0.82em;
+    color: var(--text-muted);
+    line-height: 1.4;
+    display: -webkit-box;
+    -webkit-line-clamp: 2;
+    -webkit-box-orient: vertical;
+    overflow: hidden;
+}
+
+.notif-time {
+    font-size: 0.72em;
+    color: var(--text-muted);
+    margin-top: 3px;
+    opacity: 0.7;
+}
+
+.notif-read .notif-title {
+    font-weight: 400;
+    opacity: 0.65;
+}
+
+.notif-dot {
+    width: 8px;
+    height: 8px;
+    border-radius: 50%;
+    background: var(--info);
+    flex-shrink: 0;
+    margin-top: 6px;
+}
+
+.btn-sm {
+    padding: 0.3rem 0.6rem;
+    font-size: 0.82rem;
+    border-radius: var(--radius-sm, 6px);
+}
+
+.btn-text {
+    background: none;
+    border: none;
+    color: var(--text-secondary);
+    cursor: pointer;
+    transition: color 0.15s;
+}
+
+.btn-text:hover {
+    color: var(--text-primary);
+    background: var(--bg-hover);
+}
+
+/* ==========================================================================
+   Notification Dropdown Panel
+   ========================================================================== */
+
+.notification-dropdown {
+    display: none;
+    position: absolute;
+    top: calc(100% + 6px);
+    right: 0;
+    width: 380px;
+    max-height: 520px;
+    background: var(--bg-tertiary);
+    border: 1px solid var(--border-color);
+    border-radius: var(--radius-lg);
+    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
+    z-index: 300;
+    overflow: hidden;
+}
+
+.notification-dropdown.open {
+    display: block;
+}
+
+.notif-dropdown-header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 12px 16px;
+    border-bottom: 1px solid var(--border-color);
+}
+
+.notif-dropdown-body {
+    max-height: 360px;
+    overflow-y: auto;
+}
+
+.notif-dropdown-footer {
+    border-top: 1px solid var(--border-color);
+}

routes/web.php

@@ -22,6 +22,7 @@ $router->get('/dashboard', [DashboardController::class, 'index'], [AuthMiddlewar
 $router->get('/dashboard/stats', [DashboardController::class, 'stats'], [AuthMiddleware::class]);
 $router->get('/dashboard/refresh-metrics', [DashboardController::class, 'refreshMetrics'], [AuthMiddleware::class]);
 $router->get('/dashboard/chart-data', [DashboardController::class, 'chartData'], [AuthMiddleware::class]);
+$router->get('/notifications', [DashboardController::class, 'notifications'], [AuthMiddleware::class]);
 
 $router->get('/login', [AuthController::class, 'loginForm']);
 $router->post('/login', [AuthController::class, 'login'], [CSRFMiddleware::class, RateLimitMiddleware::class]);

src/Controllers/ApiController.php

@@ -713,9 +713,15 @@ class ApiController
         $result = $notificationModel->getForUser((int) $user['id'], $page, $perPage);
         $unreadCount = $notificationModel->getUnreadCount((int) $user['id']);
 
+        $data = array_map(function ($n) {
+            $n['time_ago'] = time_ago($n['created_at'] ?? '');
+            $n['created_at_timestamp'] = $n['created_at'] ? strtotime($n['created_at']) : 0;
+            return $n;
+        }, $result['data']);
+
         $this->view->json([
             'success' => true,
-            'data' => $result['data'],
+            'data' => $data,
             'pagination' => [
                 'page' => $result['page'],
                 'per_page' => $result['per_page'],

src/Controllers/DashboardController.php

@@ -7,6 +7,7 @@ namespace ServerManager\Controllers;
 use ServerManager\Core\App;
 use ServerManager\Core\Session;
 use ServerManager\Models\Server;
+use ServerManager\Models\Notification;
 use ServerManager\Services\MonitoringService;
 use ServerManager\Services\AuditService;
 
@@ -80,4 +81,22 @@ class DashboardController
             'data' => $data,
         ]);
     }
+
+    public function notifications(): void
+    {
+        $userId = (int) Session::get('user_id');
+        $page = (int) ($_GET['page'] ?? 1);
+        $perPage = 20;
+
+        $notificationModel = new Notification();
+        $result = $notificationModel->getForUser($userId, $page, $perPage);
+        $unreadCount = $notificationModel->getUnreadCount($userId);
+
+        $this->view->display('notifications.index', [
+            'title' => 'Notifications - ServerManager',
+            'notifications' => $result['data'],
+            'pagination' => $result,
+            'unreadCount' => $unreadCount,
+        ]);
+    }
 }

views/dashboard/index.php

@@ -155,6 +155,12 @@ $aggregatedMetrics = $aggregatedMetrics ?? [];
                                     &middot; <?= date('H:i', strtotime($activity['created_at'] ?? '')) ?>
                                 </span>
                             </div>
+                        </div>
+                    <?php endforeach; ?>
+                </div>
+            <?php endif; ?>
+        </div>
+    </div>
 </div>
 
 <script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.7/dist/chart.umd.min.js"></script>
@@ -298,9 +304,4 @@ if (aggregatedData.length > 0) {
 
 setInterval(refreshAggregatedChart, 30000);
 </script>
-                    <?php endforeach; ?>
-                </div>
-            <?php endif; ?>
-        </div>
-    </div>
 </div>

views/layouts/main.php

@@ -4,6 +4,17 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <meta name="csrf-token" content="<?= $_SESSION['csrf_token'] ?? '' ?>">
+    <meta name="api-token" content="<?php
+        $uid = $_SESSION['user_id'] ?? 0;
+        $token = '';
+        if ($uid) {
+            $u = \ServerManager\Core\Database::getInstance()->fetch(
+                'SELECT api_token FROM users WHERE id = ? AND status = \'active\'', [(int) $uid]
+            );
+            $token = $u['api_token'] ?? '';
+        }
+        echo htmlspecialchars($token);
+    ?>">
     <title><?= htmlspecialchars($title ?? 'ServerManager') ?></title>
     <link rel="icon" type="image/svg+xml" href="/assets/img/server.svg">
     <link rel="stylesheet" href="/assets/css/style.css">
@@ -29,6 +40,12 @@
                             <span>Dashboard</span>
                         </a>
                     </li>
+                    <li class="nav-item">
+                        <a href="/notifications" class="nav-link <?= str_starts_with($_SERVER['REQUEST_URI'] ?? '', '/notifications') ? 'active' : '' ?>">
+                            <i class="fas fa-bell"></i>
+                            <span>Notifications</span>
+                        </a>
+                    </li>
                     <li class="nav-item nav-item-accordion <?= str_starts_with($_SERVER['REQUEST_URI'] ?? '', '/servers') ? 'active' : '' ?>">
                         <a href="#" class="nav-link" onclick="toggleServerList(event)">
                             <i class="fas fa-hdd"></i>
@@ -135,6 +152,34 @@
                         <button class="btn-icon" id="themeToggle" title="Toggle theme">
                             <i class="fas fa-moon"></i>
                         </button>
+                        <div class="notification-btn-wrapper">
+                            <button class="btn-icon notification-btn" id="notificationBell" title="Notifications" onclick="toggleNotifications()">
+                                <i class="fas fa-bell"></i>
+                                <span class="notification-badge" id="notificationBadge" style="display:none">0</span>
+                            </button>
+                            <div class="notification-dropdown" id="notifDropdown">
+                                <div class="notif-dropdown-header">
+                                    <span style="font-weight:600;font-size:0.9em">Notifications</span>
+                                    <div style="display:flex;align-items:center;gap:6px">
+                                        <button class="btn-text" id="markAllReadBtn" onclick="markAllRead()" style="display:none;font-size:0.78em;padding:2px 6px;border-radius:4px">
+                                            <i class="fas fa-check-double"></i> Mark all read
+                                        </button>
+                                        <button class="btn-text" onclick="closeNotifications()" style="font-size:0.78em;padding:2px 6px;border-radius:4px">&times;</button>
+                                    </div>
+                                </div>
+                                <div class="notif-dropdown-body" id="notifList">
+                                    <div style="padding:40px 20px;text-align:center;color:var(--text-muted)">
+                                        <i class="fas fa-spinner fa-spin" style="font-size:1.5em;margin-bottom:10px;display:block"></i>
+                                        <span>Loading notifications...</span>
+                                    </div>
+                                </div>
+                                <div class="notif-dropdown-footer">
+                                    <a href="/notifications" class="btn-text" style="font-size:0.82em;color:var(--info);width:100%;text-align:center;padding:8px;display:block">
+                                        <i class="fas fa-external-link-alt"></i> View all notifications
+                                    </a>
+                                </div>
+                            </div>
+                        </div>
                     </div>
                 </div>
             </header>
@@ -169,6 +214,171 @@
     <?php endif; ?>
 <script>
 let serverListLoaded = false;
+
+function getApiToken() {
+    return document.querySelector('meta[name="api-token"]')?.getAttribute('content') || '';
+}
+
+function toggleNotifications() {
+    const dd = document.getElementById('notifDropdown');
+    if (dd.classList.contains('open')) {
+        closeNotifications();
+    } else {
+        openNotifications();
+    }
+}
+
+function openNotifications() {
+    const dd = document.getElementById('notifDropdown');
+    dd.classList.add('open');
+    fetchNotifications();
+    document.addEventListener('click', notifOutsideClick);
+}
+
+function closeNotifications() {
+    const dd = document.getElementById('notifDropdown');
+    dd.classList.remove('open');
+    document.removeEventListener('click', notifOutsideClick);
+}
+
+function notifOutsideClick(e) {
+    const wrapper = document.querySelector('.notification-btn-wrapper');
+    if (!wrapper.contains(e.target)) {
+        closeNotifications();
+    }
+}
+
+function fetchNotifications() {
+    const list = document.getElementById('notifList');
+    list.innerHTML = '<div style="padding:40px 20px;text-align:center;color:var(--text-muted)"><i class="fas fa-spinner fa-spin" style="font-size:1.5em;margin-bottom:10px;display:block"></i><span>Loading notifications...</span></div>';
+
+    const token = getApiToken();
+    const headers = { 'Accept': 'application/json' };
+    if (token) headers['Authorization'] = 'Bearer ' + token;
+
+    fetch('/api/notifications?per_page=10', { headers })
+        .then(r => r.json())
+        .then(d => {
+            if (!d.success) {
+                list.innerHTML = '<div style="padding:40px 20px;text-align:center;color:var(--text-muted)">Could not load notifications.</div>';
+                return;
+            }
+            renderNotifications(d.data || [], d.unread_count || 0);
+        })
+        .catch(() => {
+            list.innerHTML = '<div style="padding:40px 20px;text-align:center;color:var(--danger)">Failed to load notifications.</div>';
+        });
+}
+
+function renderNotifications(items, unreadCount) {
+    const list = document.getElementById('notifList');
+
+    if (!items.length) {
+        list.innerHTML = '<div style="padding:40px 20px;text-align:center;color:var(--text-muted)">'
+            + '<i class="fas fa-check-circle" style="font-size:1.8em;margin-bottom:10px;display:block;color:var(--success)"></i>'
+            + '<span>No notifications</span></div>';
+        document.getElementById('markAllReadBtn').style.display = 'none';
+        return;
+    }
+
+    let html = '';
+    items.forEach(function(n) {
+        const typeColors = { error: 'danger', warning: 'warning', info: 'info' };
+        const typeColor = typeColors[n.type] || 'info';
+        const icons = { error: 'fa-times-circle', warning: 'fa-exclamation-triangle', info: 'fa-info-circle' };
+        const icon = icons[n.type] || 'fa-info-circle';
+
+        html += '<div class="notif-item ' + (n.is_read ? 'notif-read' : 'notif-unread') + '"'
+            + ' onclick="markRead(' + n.id + ', this)"'
+            + ' data-id="' + n.id + '">'
+            + '<div class="notif-icon notif-' + typeColor + '"><i class="fas ' + icon + '"></i></div>'
+            + '<div class="notif-content">'
+            + '<div class="notif-title">' + escapeHtml(n.title) + '</div>'
+            + '<div class="notif-message">' + escapeHtml(n.message) + '</div>'
+            + '<div class="notif-time">' + (n.time_ago || '') + '</div>'
+            + '</div>'
+            + (n.is_read ? '' : '<div class="notif-dot"></div>')
+            + '</div>';
+    });
+    list.innerHTML = html;
+
+    document.getElementById('markAllReadBtn').style.display = unreadCount > 0 ? 'inline-flex' : 'none';
+}
+
+function markRead(id, el) {
+    if (el.classList.contains('notif-read')) return;
+
+    const token = getApiToken();
+    const headers = { 'Accept': 'application/json' };
+    if (token) headers['Authorization'] = 'Bearer ' + token;
+
+    fetch('/api/notifications/' + id + '/read', { method: 'POST', headers })
+        .then(r => r.json())
+        .then(d => {
+            if (d.success) {
+                el.classList.remove('notif-unread');
+                el.classList.add('notif-read');
+                const dot = el.querySelector('.notif-dot');
+                if (dot) dot.remove();
+                updateUnreadCount();
+            }
+        })
+        .catch(function(){});
+}
+
+function markAllRead() {
+    const token = getApiToken();
+    const headers = { 'Accept': 'application/json' };
+    if (token) headers['Authorization'] = 'Bearer ' + token;
+
+    fetch('/api/notifications/read-all', { method: 'POST', headers })
+        .then(r => r.json())
+        .then(d => {
+            if (d.success) {
+                document.querySelectorAll('.notif-item').forEach(function(el) {
+                    el.classList.remove('notif-unread');
+                    el.classList.add('notif-read');
+                    const dot = el.querySelector('.notif-dot');
+                    if (dot) dot.remove();
+                });
+                document.getElementById('markAllReadBtn').style.display = 'none';
+                updateUnreadCount();
+            }
+        })
+        .catch(function(){});
+}
+
+function updateUnreadCount() {
+    const token = getApiToken();
+    const headers = { 'Accept': 'application/json' };
+    if (token) headers['Authorization'] = 'Bearer ' + token;
+
+    fetch('/api/notifications/unread-count', { headers })
+        .then(r => r.json())
+        .then(d => {
+            const count = d.unread_count || 0;
+            const badge = document.getElementById('notificationBadge');
+            if (count > 0) {
+                badge.textContent = count > 99 ? '99+' : count;
+                badge.style.display = 'inline-flex';
+            } else {
+                badge.style.display = 'none';
+            }
+        })
+        .catch(function(){});
+}
+
+function escapeHtml(str) {
+    const d = document.createElement('div');
+    d.textContent = str;
+    return d.innerHTML;
+}
+
+// Poll unread count every 60s
+setInterval(updateUnreadCount, 60000);
+// Initial fetch
+updateUnreadCount();
+
 function toggleServerList(e) {
     e.preventDefault();
     const item = e.currentTarget.closest('.nav-item-accordion');

views/notifications/index.php

@@ -0,0 +1,91 @@
+<?php
+$notifications = $notifications ?? [];
+$pagination = $pagination ?? [];
+$unreadCount = $unreadCount ?? 0;
+$data = $notifications ?? [];
+?>
+
+<div class="page-header">
+    <div class="page-header-left">
+        <div class="back-link">
+            <a href="/dashboard"><i class="fas fa-arrow-left"></i> Back to Dashboard</a>
+        </div>
+        <h1 class="page-title">Notifications</h1>
+        <p class="page-subtitle">
+            <?= $unreadCount ?> unread &middot; <?= $pagination['total'] ?? 0 ?> total
+        </p>
+    </div>
+    <div class="page-header-right">
+        <?php if ($unreadCount > 0): ?>
+        <button class="btn btn-sm btn-text" onclick="markAllRead()" style="font-size:0.85em">
+            <i class="fas fa-check-double"></i> Mark all read
+        </button>
+        <?php endif; ?>
+    </div>
+</div>
+
+<div class="card">
+    <div class="card-body" style="padding:0">
+        <?php if (empty($data)): ?>
+        <div style="padding:60px 20px;text-align:center;color:var(--text-muted)">
+            <i class="fas fa-check-circle" style="font-size:2.5em;margin-bottom:12px;display:block;color:var(--success)"></i>
+            <p style="font-size:1.05em">All caught up!</p>
+            <p style="font-size:0.9em">No notifications to show.</p>
+        </div>
+        <?php else: ?>
+            <?php foreach ($data as $n): ?>
+            <?php
+                $typeColors = ['error' => 'danger', 'warning' => 'warning', 'info' => 'info'];
+                $icons = ['error' => 'fa-times-circle', 'warning' => 'fa-exclamation-triangle', 'info' => 'fa-info-circle'];
+                $tc = $typeColors[$n['type']] ?? 'info';
+                $icon = $icons[$n['type']] ?? 'fa-info-circle';
+                $isRead = !empty($n['is_read']);
+            ?>
+            <div class="notif-item <?= $isRead ? 'notif-read' : 'notif-unread' ?>" data-id="<?= $n['id'] ?>">
+                <div class="notif-icon notif-<?= $tc ?>"><i class="fas <?= $icon ?>"></i></div>
+                <div class="notif-content">
+                    <div class="notif-title"><?= htmlspecialchars($n['title'] ?? '') ?></div>
+                    <div class="notif-message"><?= htmlspecialchars($n['message'] ?? '') ?></div>
+                    <div class="notif-time"><?= time_ago($n['created_at'] ?? '') ?></div>
+                </div>
+                <?php if (!$isRead): ?>
+                <div class="notif-dot"></div>
+                <?php endif; ?>
+            </div>
+            <?php endforeach; ?>
+        <?php endif; ?>
+    </div>
+</div>
+
+<?php if (($pagination['total_pages'] ?? 1) > 1): ?>
+<div class="pagination">
+    <?php for ($i = 1; $i <= $pagination['total_pages']; $i++): ?>
+    <a href="/notifications?page=<?= $i ?>" class="btn btn-sm <?= ($pagination['page'] ?? 1) === $i ? 'btn-primary' : 'btn-secondary' ?>">
+        <?= $i ?>
+    </a>
+    <?php endfor; ?>
+</div>
+<?php endif; ?>
+
+<script>
+function markAllRead() {
+    const token = document.querySelector('meta[name="api-token"]')?.getAttribute('content') || '';
+    const headers = { 'Accept': 'application/json' };
+    if (token) headers['Authorization'] = 'Bearer ' + token;
+
+    fetch('/api/notifications/read-all', { method: 'POST', headers })
+        .then(r => r.json())
+        .then(d => {
+            if (d.success) {
+                document.querySelectorAll('.notif-item').forEach(function(el) {
+                    el.classList.remove('notif-unread');
+                    el.classList.add('notif-read');
+                    const dot = el.querySelector('.notif-dot');
+                    if (dot) dot.remove();
+                });
+                location.reload();
+            }
+        })
+        .catch(function(){});
+}
+</script>

views/servers/show.php

@@ -304,49 +304,62 @@ $canManage = $server_role === 'owner' || $server_role === 'manager';
 </div>
 
 <div id="thresholdModal" class="modal">
-    <div class="modal-dialog">
+    <div class="modal-dialog" style="max-width:560px">
         <div class="modal-header">
             <h3><i class="fas fa-bell"></i> Notification Thresholds</h3>
             <button type="button" class="modal-close" onclick="closeThresholdModal()">&times;</button>
         </div>
         <div class="modal-body">
-            <p class="text-muted" style="margin-bottom:20px">
-                Notifications are sent to all users with access to this server when the agent reports values
-                exceeding these thresholds. Only the server owner can modify them.
+            <p class="text-muted" style="margin-bottom:24px;font-size:0.9em;line-height:1.5">
+                When the agent reports values above these thresholds, all users with access to this server
+                receive a notification and push alert. Only the server owner can modify them.
             </p>
             <form id="thresholdForm" onsubmit="return false">
-                <div class="table-responsive">
-                    <table class="table">
-                        <thead>
-                            <tr>
-                                <th>Resource</th>
-                                <th>Warning (%)</th>
-                                <th>Critical (%)</th>
-                            </tr>
-                        </thead>
-                        <tbody>
-                            <?php foreach (['cpu' => 'CPU', 'ram' => 'RAM', 'disk' => 'Disk'] as $key => $label): ?>
-                            <tr>
-                                <td><strong><?= $label ?></strong></td>
-                                <td>
-                                    <input type="number" name="<?= $key ?>_warning"
-                                           value="<?= htmlspecialchars((string)($server["threshold_{$key}_warning"] ?? 80)) ?>"
-                                           min="0" max="100" step="0.01" class="form-control" style="width:120px">
-                                </td>
-                                <td>
-                                    <input type="number" name="<?= $key ?>_critical"
-                                           value="<?= htmlspecialchars((string)($server["threshold_{$key}_critical"] ?? 95)) ?>"
-                                           min="0" max="100" step="0.01" class="form-control" style="width:120px">
-                                </td>
-                            </tr>
-                            <?php endforeach; ?>
-                        </tbody>
-                    </table>
+                <?php $resources = [
+                    'cpu'  => ['label' => 'CPU',     'icon' => 'fas fa-microchip', 'color' => 'var(--info)'],
+                    'ram'  => ['label' => 'RAM',     'icon' => 'fas fa-memory',    'color' => 'var(--purple)'],
+                    'disk' => ['label' => 'Disk',    'icon' => 'fas fa-hdd',       'color' => 'var(--warning)'],
+                ]; ?>
+                <?php foreach ($resources as $key => $res): ?>
+                <div style="background:var(--card-bg);border:1px solid var(--border);border-radius:10px;padding:16px 20px;margin-bottom:12px">
+                    <div style="display:flex;align-items:center;gap:10px;margin-bottom:16px">
+                        <i class="<?= $res['icon'] ?>" style="color:<?= $res['color'] ?>;font-size:1.2em;width:20px;text-align:center"></i>
+                        <strong style="font-size:1em"><?= $res['label'] ?></strong>
                     </div>
+                    <div style="display:flex;gap:24px;align-items:flex-start">
+                        <div style="flex:1">
+                            <label style="display:flex;align-items:center;gap:6px;font-size:0.82em;color:var(--warning);margin-bottom:6px;font-weight:600">
+                                <i class="fas fa-exclamation-triangle" style="font-size:0.85em"></i> Warning
+                            </label>
+                            <div style="display:flex;align-items:center;gap:10px">
+                                <input type="range" name="<?= $key ?>_warning"
+                                       value="<?= htmlspecialchars((string)($server["threshold_{$key}_warning"] ?? 80)) ?>"
+                                       min="0" max="100" step="0.5"
+                                       oninput="document.getElementById('<?= $key ?>_warn_val').textContent = this.value + '%'"
+                                       style="flex:1;height:6px;-webkit-appearance:none;appearance:none;border-radius:3px;background:linear-gradient(to right, var(--success), var(--warning) 50%, var(--danger) 80%);outline:none;cursor:pointer">
+                                <span id="<?= $key ?>_warn_val" style="min-width:52px;font-size:0.95em;font-weight:700;color:var(--warning);text-align:right"><?= htmlspecialchars((string)($server["threshold_{$key}_warning"] ?? 80)) ?>%</span>
+                            </div>
+                        </div>
+                        <div style="flex:1">
+                            <label style="display:flex;align-items:center;gap:6px;font-size:0.82em;color:var(--danger);margin-bottom:6px;font-weight:600">
+                                <i class="fas fa-bolt" style="font-size:0.85em"></i> Critical
+                            </label>
+                            <div style="display:flex;align-items:center;gap:10px">
+                                <input type="range" name="<?= $key ?>_critical"
+                                       value="<?= htmlspecialchars((string)($server["threshold_{$key}_critical"] ?? 95)) ?>"
+                                       min="0" max="100" step="0.5"
+                                       oninput="document.getElementById('<?= $key ?>_crit_val').textContent = this.value + '%'"
+                                       style="flex:1;height:6px;-webkit-appearance:none;appearance:none;border-radius:3px;background:linear-gradient(to right, var(--success), var(--warning) 50%, var(--danger) 80%);outline:none;cursor:pointer">
+                                <span id="<?= $key ?>_crit_val" style="min-width:52px;font-size:0.95em;font-weight:700;color:var(--danger);text-align:right"><?= htmlspecialchars((string)($server["threshold_{$key}_critical"] ?? 95)) ?>%</span>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+                <?php endforeach; ?>
             </form>
         </div>
         <div class="modal-footer">
-            <button class="btn btn-primary" onclick="saveThresholds()"><i class="fas fa-save"></i> Save</button>
+            <button class="btn btn-primary" onclick="saveThresholds()"><i class="fas fa-save"></i> Save Thresholds</button>
             <button class="btn btn-secondary" onclick="closeThresholdModal()">Cancel</button>
         </div>
     </div>