feat: improve dashboard and connection workflows

- add connection delete endpoint and update connection list handling

- expand dashboard visualization behavior

- update helpers/header and project TODO tracking

NEXT_STEPS.md

@@ -1,6 +1,6 @@
-# 📋 NÄCHSTE ARBEITSPAKETE
+# 📋 NÄCHSTE ARBEITSPAKETE
 
-## 🎯 Für die nächsten Sessions
+## 🎯 Für die nächsten Sessions
 
 ### Package 1: Fehlerbehandlung & Sessions (1-2h)
 - [ ] Session-Handling in `bootstrap.php` implementieren
@@ -9,9 +9,9 @@
 - [ ] Validierungsfehler anzeigen
 
 ### Package 2: Delete-Funktionen (1h)
-- [ ] DELETE-Endpoints für alle Module
-- [ ] AJAX-Bestätigung vor Löschen
-- [ ] Kaskadierendes Löschen prüfen (z.B. Floor → Racks)
+- [ ] DELETE-Endpoints für alle Module
+- [ ] AJAX-Bestätigung vor Löschen
+- [ ] Kaskadierendes Löschen prüfen (z.B. Floor → Racks)
 
 ### Package 3: Port-Management (2-3h)
 - [ ] Ports zu Device-Types verwalten
@@ -19,23 +19,23 @@
 - [ ] Port-Status (aktiv/inaktiv)
 - [ ] VLAN-Zuordnung zu Ports
 
-### Package 4: SVG-Editor für Floorplans (4-5h)
-- [ ] Interaktiver SVG-Editor für Rooms
+### Package 4: SVG-Editor für Floorplans (4-5h)
+- [ ] Interaktiver SVG-Editor für Rooms
 - [ ] Netzwerkdosen platzieren
 - [ ] Dosen nummerieren
 - [ ] Speicher-Integration
 
 ### Package 5: Navigation & UI (1-2h)
-- [ ] Breadcrumbs hinzufügen
-- [ ] Mobile-Menü verbessern
-- [ ] CSS polieren (Farben, Abstände)
+- [ ] Breadcrumbs hinzufügen
+- [ ] Mobile-Menü verbessern
+- [ ] CSS polieren (Farben, Abstände)
 - [ ] Dark-Mode (optional)
 
 ---
 
-## 📚 Code-Referenzen
+## 📚 Code-Referenzen
 
-### Template für neue CRUD-Module:
+### Template für neue CRUD-Module:
 ```php
 // list.php: Filter + Tabelle
 // edit.php: Formular
@@ -71,7 +71,7 @@ $whereSql = $where ? "WHERE " . implode(" AND ", $where) : "";
 
 ---
 
-## 🔧 Bekannte TODOs im Code
+## 🔧 Bekannte TODOs im Code
 
 Alle noch offenen Punkte sind mit `// TODO:` gekennzeichnet:
 
@@ -83,48 +83,48 @@ grep -r "TODO:" app/modules/ --include="*.php"
 Wichtigste TODOs:
 - `index.php:19` - Session starten
 - `*/save.php` - Fehlerbehandlung
-- `connections/` - Port-Verknüpfung
+- `connections/` - Port-Verknüpfung
 - `lib/auth.php` - Auth-Logik
 
 ---
 
-## 💾 Datenbank-Setup
+## 💾 Datenbank-Setup
 
 Die Datenbank wird automatisch durch `init.sql` initialisiert.
 
 Wichtige Tabellen:
 - `locations` - Standorte
-- `buildings` - Gebäude
+- `buildings` - Gebäude
 - `floors` - Stockwerke
-- `rooms` - Räume
+- `rooms` - Räume
 - `network_outlets` - Netzwerkdosen
-- `device_types` - Gerätetypen
+- `device_types` - Gerätetypen
 - `device_type_ports` - Port-Templates
-- `devices` - konkrete Geräte
-- `device_ports` - Gerätports
+- `devices` - konkrete Geräte
+- `device_ports` - Gerätports
 - `racks` - Racks
 - `connections` - Verbindungen zwischen Ports
 
 ---
 
-## 🧪 Testing-Checklist
+## 🧪 Testing-Checklist
 
-Bei jeder Änderung checken:
+Bei jeder Änderung checken:
 - [ ] Formular sendet Daten korrekt
 - [ ] Daten werden in DB gespeichert
 - [ ] Liste zeigt neue Daten
-- [ ] Edit lädt existierende Daten vor
+- [ ] Edit lädt existierende Daten vor
 - [ ] Filter funktioniert
 - [ ] Validierungsfehler werden angezeigt
 
 ---
 
-## 🎨 Design-Richtlinien
+## 🎨 Design-Richtlinien
 
 ### Farben:
 - Primary (Buttons): `#007bff` (Blau)
-- Success (Speichern): `#28a745` (Grün)
-- Danger (Löschen): `#dc3545` (Rot)
+- Success (Speichern): `#28a745` (Grün)
+- Danger (Löschen): `#dc3545` (Rot)
 - Background: `#f9f9f9` (Hell)
 - Border: `#ddd` (Hell-Grau)
 
@@ -135,8 +135,28 @@ Bei jeder Änderung checken:
 
 ### Schriftarten:
 - Erben von HTML (derzeit: System)
-- Monospace für Code/IDs: `font-family: monospace`
+- Monospace für Code/IDs: `font-family: monospace`
 
 ---
 
-**Happy Coding! 🚀**
+**Happy Coding! 🚀**
+
+## Aktuell offene TODOs (Stand: 18. Februar 2026)
+
+- [ ] #15 Neue Verbindung: Es kann keine Netzwerkdose ausgewahlt werden.
+- [ ] #14 Hilfslinien der Stockwerkskarten nur im Edit-Mode anzeigen; im Anzeige-Mode ausblenden.
+- [ ] #11 Encoding- und Umlautfehler beheben (inkl. ae/oe/ue-Themen).
+- [ ] #10 Dashboard-Grafik erzeugen:
+  - Oberste Ebene: Locations, ggf. mit Unterordnung.
+  - Darunter: Gebaudekomplexe mit Rack-Verbindungen.
+  - Darunter: Stockwerke.
+  - Darunter: Etagenweise Verbindungen.
+- [ ] #8 Gerate löschen fehlt: Es erfolgt Weiterleitung, aber keine echte Fehlermeldung.
+- [ ] #7 Letzten Punkt im Floor-Editor löschen:
+  - URL: `http://localhost/?module=floors&action=edit&id=1`
+- [ ] #5 Dashboard als zoombare und verschiebbare SVG-Flache:
+  - Gerate anordnen.
+  - Gerate, Ports und Verbindungen anklickbar.
+  - Sprechblase mit Infos und Buttons zu Bereichen (editieren, entfernen, ...).
+- [ ] #4 `device_types/edit`: Option "Ports automatisch erstellen" nur beim Erstellen anzeigen, nicht beim Editieren.
+

TODO.md

@@ -1,4 +1,4 @@
-# TODO
+# TODO
 
 Bereinigte und aktuelle TODO-Liste (Stand: 18. Februar 2026).
 Quelle: vorhandene `TODO`-Marker im Repository plus offene Architekturpunkte.
@@ -14,12 +14,9 @@ Quelle: vorhandene `TODO`-Marker im Repository plus offene Architekturpunkte.
 
 ## Offen (direkt im Code markiert)
 
-- [ ] `app/modules/dashboard/list.php:11`:
-      Grosse zoombare/verschiebbare SVG-Wand mit Punkten + Overlay-Drilldown (z. B. Rack-Ansicht).
-- [ ] `app/modules/connections/list.php:387`:
-      Verbindung im UI bearbeiten/loeschen.
-- [ ] `app/lib/helpers.php:300`:
-      Generischer Platzhalter fuer weitere Helper (nur bei konkretem Bedarf ergaenzen).
+- [x] `app/modules/dashboard/list.php`: zoombare/verschiebbare SVG-Wand mit klickbaren Punkten und Overlay-Drilldown umgesetzt.
+- [x] `app/modules/connections/list.php`: Detailbereich fuer ausgewaehlte Verbindung inkl. Bearbeiten/Loeschen im UI umgesetzt.
+- [x] `app/lib/helpers.php`: konkrete allgemeine Helper ergaenzt (`formatDateTime`, `formatBytes`, `generateUuidV4`, `normalizeSvgCoordinate`).
 
 ## Offen (Bugs / Doku / Statusdateien)
 

app/lib/helpers.php

@@ -297,8 +297,83 @@ HTML, [
  * Sonstiges
  * ========================= */
 
-// TODO: Weitere Helfer nach Bedarf
-// - Datum formatieren
-// - Bytes → MB
-// - UUID erzeugen
-// - SVG-Koordinaten normalisieren
+/**
+ * Formatiert Datum/Uhrzeit robust oder gibt Fallback zurueck.
+ *
+ * @param string|null $value
+ * @param string $format
+ * @param string $fallback
+ * @return string
+ */
+function formatDateTime(?string $value, string $format = 'd.m.Y H:i', string $fallback = '-'): string
+{
+    if ($value === null || trim($value) === '') {
+        return $fallback;
+    }
+
+    $timestamp = strtotime($value);
+    if ($timestamp === false) {
+        return $fallback;
+    }
+
+    return date($format, $timestamp);
+}
+
+/**
+ * Formatiert Byte-Werte in menschenlesbare Einheit.
+ *
+ * @param int|float $bytes
+ * @param int $precision
+ * @return string
+ */
+function formatBytes($bytes, int $precision = 2): string
+{
+    $value = (float)$bytes;
+    if ($value <= 0) {
+        return '0 B';
+    }
+
+    $units = ['B', 'KB', 'MB', 'GB', 'TB'];
+    $power = min((int)floor(log($value, 1024)), count($units) - 1);
+    $scaled = $value / (1024 ** $power);
+
+    return number_format($scaled, $precision, '.', '') . ' ' . $units[$power];
+}
+
+/**
+ * Erzeugt eine UUID v4.
+ *
+ * @return string
+ * @throws Exception
+ */
+function generateUuidV4(): string
+{
+    $bytes = random_bytes(16);
+    $bytes[6] = chr((ord($bytes[6]) & 0x0f) | 0x40);
+    $bytes[8] = chr((ord($bytes[8]) & 0x3f) | 0x80);
+    $hex = bin2hex($bytes);
+
+    return sprintf(
+        '%s-%s-%s-%s-%s',
+        substr($hex, 0, 8),
+        substr($hex, 8, 4),
+        substr($hex, 12, 4),
+        substr($hex, 16, 4),
+        substr($hex, 20, 12)
+    );
+}
+
+/**
+ * Klemmt eine SVG-Koordinate auf gueltigen Bereich.
+ *
+ * @param float $value
+ * @param float $min
+ * @param float $max
+ * @param int $precision
+ * @return float
+ */
+function normalizeSvgCoordinate(float $value, float $min, float $max, int $precision = 2): float
+{
+    $normalized = max($min, min($max, $value));
+    return round($normalized, $precision);
+}

app/modules/connections/delete.php

@@ -0,0 +1,41 @@
+<?php
+/**
+ * app/modules/connections/delete.php
+ *
+ * Loescht eine Verbindung und leitet zur Liste zurueck.
+ */
+
+$connectionId = (int)($_GET['id'] ?? $_POST['id'] ?? 0);
+
+if ($connectionId <= 0) {
+    $_SESSION['error'] = 'Ungueltige Verbindungs-ID';
+    header('Location: ?module=connections&action=list');
+    exit;
+}
+
+$connection = $sql->single(
+    "SELECT id FROM connections WHERE id = ?",
+    "i",
+    [$connectionId]
+);
+
+if (!$connection) {
+    $_SESSION['error'] = 'Verbindung nicht gefunden';
+    header('Location: ?module=connections&action=list');
+    exit;
+}
+
+$rows = $sql->set(
+    "DELETE FROM connections WHERE id = ?",
+    "i",
+    [$connectionId]
+);
+
+if ($rows > 0) {
+    $_SESSION['success'] = 'Verbindung geloescht';
+} else {
+    $_SESSION['error'] = 'Verbindung konnte nicht geloescht werden';
+}
+
+header('Location: ?module=connections&action=list');
+exit;

app/modules/connections/list.php

@@ -2,19 +2,13 @@
 /**
  * app/modules/connections/list.php
  *
- * Übersicht der Netzwerkverbindungen
- * - Tabellarische Liste aller Verbindungen
- * - Filter nach Geräten, VLANs, Status
- * - Später: Visuelle Netzwerk-Topologie
+ * Uebersicht der Netzwerkverbindungen
  */
 
-// =========================
-// Filter einlesen
-// =========================
 $search = trim($_GET['search'] ?? '');
 $deviceId = (int)($_GET['device_id'] ?? 0);
+$selectedConnectionId = (int)($_GET['connection_id'] ?? 0);
 
-// Einheitliche Endpunkt-Aufloesung fuer polymorphe Port-Typen.
 $endpointUnionSql = "
     SELECT
         'device' AS endpoint_type,
@@ -60,16 +54,13 @@ $endpointUnionSql = "
     LEFT JOIN floors f ON f.id = fp.floor_id
 ";
 
-// =========================
-// WHERE-Clause bauen
-// =========================
 $where = [];
 $types = '';
 $params = [];
 
 if ($search !== '') {
     $where[] = "(e1.owner_name LIKE ? OR e2.owner_name LIKE ? OR e1.port_name LIKE ? OR e2.port_name LIKE ?)";
-    $types .= "ssss";
+    $types .= 'ssss';
     $params[] = "%$search%";
     $params[] = "%$search%";
     $params[] = "%$search%";
@@ -78,16 +69,13 @@ if ($search !== '') {
 
 if ($deviceId > 0) {
     $where[] = "(e1.owner_device_id = ? OR e2.owner_device_id = ?)";
-    $types .= "ii";
+    $types .= 'ii';
     $params[] = $deviceId;
     $params[] = $deviceId;
 }
 
-$whereSql = $where ? "WHERE " . implode(" AND ", $where) : "";
+$whereSql = $where ? 'WHERE ' . implode(' AND ', $where) : '';
 
-// =========================
-// Verbindungen laden
-// =========================
 $connections = $sql->get(
     "SELECT
         c.id,
@@ -125,10 +113,22 @@ $connections = $sql->get(
     $params
 );
 
-// =========================
-// Filter-Daten
-// =========================
-$devices = $sql->get("SELECT id, name FROM devices ORDER BY name", "", []);
+$devices = $sql->get('SELECT id, name FROM devices ORDER BY name', '', []);
+
+$selectedConnection = null;
+if ($selectedConnectionId > 0) {
+    foreach ((array)$connections as $entry) {
+        if ((int)($entry['id'] ?? 0) === $selectedConnectionId) {
+            $selectedConnection = $entry;
+            break;
+        }
+    }
+}
+
+if ($selectedConnection === null && !empty($connections)) {
+    $selectedConnection = $connections[0];
+    $selectedConnectionId = (int)($selectedConnection['id'] ?? 0);
+}
 
 $selectedDevice = null;
 $selectedDevicePorts = [];
@@ -140,7 +140,7 @@ if ($deviceId > 0) {
          FROM devices d
          LEFT JOIN device_types dt ON d.device_type_id = dt.id
          WHERE d.id = ?",
-        "i",
+        'i',
         [$deviceId]
     );
 
@@ -159,7 +159,7 @@ if ($deviceId > 0) {
                  JOIN device_ports dp ON dp.id = dpm.device_port_id
                  WHERE dp.device_id = ?
              ) p",
-            "ii",
+            'ii',
             [$deviceId, $deviceId]
         )['cnt'] ?? 0);
 
@@ -187,7 +187,7 @@ if ($deviceId > 0) {
                    OR (c.port_b_type = 'patchpanel' AND e2.endpoint_type = 'floor_patchpanel')
                )
              WHERE e1.owner_device_id = ? OR e2.owner_device_id = ?",
-            "ii",
+            'ii',
             [$deviceId, $deviceId]
         )['cnt'] ?? 0);
 
@@ -207,7 +207,7 @@ if ($deviceId > 0) {
              ) p
              ORDER BY sort_id
              LIMIT 12",
-            "ii",
+            'ii',
             [$deviceId, $deviceId]
         );
 
@@ -230,159 +230,247 @@ if ($deviceId > 0) {
     }
 }
 
+$buildListUrl = static function (array $extra = []) use ($search, $deviceId): string {
+    $query = ['module' => 'connections', 'action' => 'list'];
+    if ($search !== '') {
+        $query['search'] = $search;
+    }
+    if ($deviceId > 0) {
+        $query['device_id'] = $deviceId;
+    }
+    foreach ($extra as $key => $value) {
+        if ($value === null || $value === '') {
+            continue;
+        }
+        $query[$key] = $value;
+    }
+    return '?' . http_build_query($query);
+};
 ?>
 
-<div class="connections-container">
-    <h1>Netzwerkverbindungen</h1>
+<div class="connections-layout">
+    <div class="connections-container">
+        <h1>Netzwerkverbindungen</h1>
 
-    <!-- =========================
-         Filter-Toolbar
-         ========================= -->
-    <div class="filter-form">
-        <form method="GET">
-            <input type="hidden" name="module" value="connections">
-            <input type="hidden" name="action" value="list">
+        <div class="filter-form">
+            <form method="GET">
+                <input type="hidden" name="module" value="connections">
+                <input type="hidden" name="action" value="list">
 
-            <input type="text" name="search" placeholder="Suche nach Gerät oder Port…"
-                value="<?php echo htmlspecialchars($search); ?>" class="search-input">
+                <input type="text" name="search" placeholder="Suche nach Geraet oder Port..."
+                    value="<?php echo htmlspecialchars($search); ?>" class="search-input">
 
-            <select name="device_id">
-                <option value="">- Alle Geräte -</option>
-                <?php foreach ($devices as $device): ?>
-                <option value="<?php echo $device['id']; ?>"
-                    <?php echo $device['id'] === $deviceId ? 'selected' : ''; ?>>
-                    <?php echo htmlspecialchars($device['name']); ?>
-                </option>
+                <select name="device_id">
+                    <option value="">- Alle Geraete -</option>
+                    <?php foreach ($devices as $device): ?>
+                    <option value="<?php echo (int)$device['id']; ?>"
+                        <?php echo ((int)$device['id'] === $deviceId) ? 'selected' : ''; ?>>
+                        <?php echo htmlspecialchars((string)$device['name']); ?>
+                    </option>
+                    <?php endforeach; ?>
+                </select>
+
+                <button type="submit" class="button">Filter</button>
+                <a href="?module=connections&action=list" class="button">Reset</a>
+                <a href="?module=connections&action=edit" class="button button-primary">+ Neue Verbindung</a>
+            </form>
+        </div>
+
+        <?php if (!empty($connections)): ?>
+        <table class="connections-list">
+            <thead>
+                <tr>
+                    <th>Von (Geraet -> Port)</th>
+                    <th>Nach (Geraet -> Port)</th>
+                    <th>VLANs</th>
+                    <th>Beschreibung</th>
+                    <th>Status</th>
+                    <th>Aktionen</th>
+                </tr>
+            </thead>
+            <tbody>
+                <?php foreach ($connections as $conn): ?>
+                <?php
+                    $connId = (int)($conn['id'] ?? 0);
+                    $comment = trim((string)($conn['comment'] ?? ''));
+                    $hasMissingInfo = empty($conn['endpoint_a_name']) || empty($conn['endpoint_b_name'])
+                        || empty($conn['port_a_name']) || empty($conn['port_b_name']);
+                    $commentLower = mb_strtolower($comment, 'UTF-8');
+                    $warningFromComment = preg_match('/warn|achtung|critical/', $commentLower) === 1;
+                    $hasWarning = $hasMissingInfo || $warningFromComment;
+                    $rowClass = $connId === $selectedConnectionId ? 'connection-row-selected' : '';
+                    $vlanList = [];
+                    if (!empty($conn['vlan_config'])) {
+                        $vlanList = (array)json_decode((string)$conn['vlan_config'], true);
+                    }
+                ?>
+                <tr class="<?php echo $rowClass; ?>">
+                    <td>
+                        <strong><?php echo htmlspecialchars((string)($conn['endpoint_a_name'] ?? 'N/A')); ?></strong><br>
+                        <small><?php echo htmlspecialchars((string)($conn['port_a_name'] ?? '-')); ?></small>
+                    </td>
+
+                    <td>
+                        <strong><?php echo htmlspecialchars((string)($conn['endpoint_b_name'] ?? 'N/A')); ?></strong><br>
+                        <small><?php echo htmlspecialchars((string)($conn['port_b_name'] ?? '-')); ?></small>
+                    </td>
+
+                    <td>
+                        <small><?php echo !empty($vlanList) ? htmlspecialchars(implode(', ', $vlanList)) : '-'; ?></small>
+                    </td>
+
+                    <td>
+                        <small><?php echo htmlspecialchars($comment); ?></small>
+                    </td>
+
+                    <td class="status-cell">
+                        <?php if ($hasWarning): ?>
+                            <span class="status-badge status-badge-warning" title="Unvollstaendige oder kritische Verbindung">Warnung</span>
+                        <?php else: ?>
+                            <span class="status-badge status-badge-ok" title="Verbindung vollstaendig">OK</span>
+                        <?php endif; ?>
+                    </td>
+
+                    <td class="actions">
+                        <a href="<?php echo htmlspecialchars($buildListUrl(['connection_id' => $connId])); ?>" class="button button-small">Details</a>
+                        <a href="?module=connections&action=edit&id=<?php echo $connId; ?>" class="button button-small">Bearbeiten</a>
+                        <a href="?module=connections&action=swap&id=<?php echo $connId; ?>" class="button button-small" onclick="return confirm('Von/Nach fuer diese Verbindung vertauschen?');">Von/Nach tauschen</a>
+                        <a href="?module=connections&action=delete&id=<?php echo $connId; ?>" class="button button-small button-danger"
+                            data-confirm-delete="true"
+                            data-confirm-message="Diese Verbindung wirklich loeschen?">
+                            Loeschen
+                        </a>
+                    </td>
+                </tr>
                 <?php endforeach; ?>
-            </select>
-
-            <button type="submit" class="button">Filter</button>
-            <a href="?module=connections&action=list" class="button">Reset</a>
-            <a href="?module=connections&action=edit" class="button button-primary">+ Neue Verbindung</a>
-        </form>
+            </tbody>
+        </table>
+        <?php else: ?>
+        <div class="empty-state">
+            <p>Keine Verbindungen gefunden.</p>
+            <p>
+                <a href="?module=connections&action=edit" class="button button-primary">
+                    Erste Verbindung anlegen
+                </a>
+            </p>
+        </div>
+        <?php endif; ?>
     </div>
 
-    <!-- =========================
-         Verbindungs-Tabelle
-         ========================= -->
-    <?php if (!empty($connections)): ?>
-    <table class="connections-list">
-        <thead>
-            <tr>
-                <th>Von (Gerät → Port)</th>
-                <th>Nach (Gerät → Port)</th>
-                <th>VLANs</th>
-                <th>Beschreibung</th>
-                <th>Status</th>
-                <th>Aktionen</th>
-            </tr>
-        </thead>
-        <tbody>
-            <?php foreach ($connections as $conn): ?>
-            <?php
-                $comment = trim($conn['comment'] ?? '');
-                $hasMissingInfo = empty($conn['endpoint_a_name']) || empty($conn['endpoint_b_name'])
-                    || empty($conn['port_a_name']) || empty($conn['port_b_name']);
-                $commentLower = mb_strtolower($comment, 'UTF-8');
-                $warningFromComment = preg_match('/warn|achtung|critical/', $commentLower);
-                $hasWarning = $hasMissingInfo || $warningFromComment;
-            ?>
-            <tr>
-                <td>
-                    <strong><?php echo htmlspecialchars($conn['endpoint_a_name'] ?? 'N/A'); ?></strong><br>
-                    <small><?php echo htmlspecialchars($conn['port_a_name'] ?? '—'); ?></small>
-                </td>
+    <aside class="connections-sidebar">
+        <section class="sidebar-card">
+            <h3>Ausgewaehlte Verbindung</h3>
+            <?php if ($selectedConnection): ?>
+                <?php
+                    $selectedConnId = (int)($selectedConnection['id'] ?? 0);
+                    $selectedVlans = [];
+                    if (!empty($selectedConnection['vlan_config'])) {
+                        $selectedVlans = (array)json_decode((string)$selectedConnection['vlan_config'], true);
+                    }
+                ?>
+                <p><strong>ID:</strong> #<?php echo $selectedConnId; ?></p>
+                <p><strong>Von:</strong><br>
+                    <?php echo htmlspecialchars((string)($selectedConnection['endpoint_a_name'] ?? 'N/A')); ?><br>
+                    <small><?php echo htmlspecialchars((string)($selectedConnection['port_a_name'] ?? '-')); ?></small>
+                </p>
+                <p><strong>Nach:</strong><br>
+                    <?php echo htmlspecialchars((string)($selectedConnection['endpoint_b_name'] ?? 'N/A')); ?><br>
+                    <small><?php echo htmlspecialchars((string)($selectedConnection['port_b_name'] ?? '-')); ?></small>
+                </p>
+                <p><strong>VLANs:</strong> <?php echo !empty($selectedVlans) ? htmlspecialchars(implode(', ', $selectedVlans)) : '-'; ?></p>
+                <p><strong>Kommentar:</strong> <?php echo htmlspecialchars((string)($selectedConnection['comment'] ?? '-')); ?></p>
+                <div class="sidebar-actions">
+                    <a href="?module=connections&action=edit&id=<?php echo $selectedConnId; ?>" class="button button-small">Bearbeiten</a>
+                    <a href="?module=connections&action=swap&id=<?php echo $selectedConnId; ?>" class="button button-small" onclick="return confirm('Von/Nach fuer diese Verbindung vertauschen?');">Tauschen</a>
+                    <a href="?module=connections&action=delete&id=<?php echo $selectedConnId; ?>" class="button button-small button-danger" data-confirm-delete="true" data-confirm-message="Diese Verbindung wirklich loeschen?">Loeschen</a>
+                </div>
+            <?php else: ?>
+                <p><em>Keine Verbindung ausgewaehlt.</em></p>
+            <?php endif; ?>
+        </section>
 
-                <td>
-                    <strong><?php echo htmlspecialchars($conn['endpoint_b_name'] ?? 'N/A'); ?></strong><br>
-                    <small><?php echo htmlspecialchars($conn['port_b_name'] ?? '—'); ?></small>
-                </td>
-
-                <td>
-                    <small>
-                        <?php
-                            if ($conn['vlan_config']) {
-                                $vlan = json_decode($conn['vlan_config'], true);
-                                echo htmlspecialchars(implode(', ', (array)$vlan));
-                            } else {
-                                echo '—';
-                            }
-                        ?>
-                    </small>
-                </td>
-
-                <td>
-                    <small><?php echo htmlspecialchars($conn['comment'] ?? ''); ?></small>
-                </td>
-                <td class="status-cell">
-                    <?php if ($hasWarning): ?>
-                        <span class="status-badge status-badge-warning" title="Unvollständige oder kritische Verbindung">
-                            ⚠️ Warnung
-                        </span>
+        <section class="sidebar-card">
+            <?php if ($selectedDevice): ?>
+                <h3>Ausgewaehltes Geraet</h3>
+                <p><strong><?php echo htmlspecialchars((string)$selectedDevice['name']); ?></strong></p>
+                <p>Typ: <?php echo htmlspecialchars((string)($selectedDevice['type_name'] ?? '-')); ?></p>
+                <p>Ports: <?php echo (int)$selectedDevice['port_count']; ?></p>
+                <p>Verbindungen: <?php echo (int)$selectedDevice['connection_count']; ?></p>
+                <p>
+                    VLANs:
+                    <?php if (!empty($selectedDeviceVlans)): ?>
+                        <?php echo htmlspecialchars(implode(', ', $selectedDeviceVlans)); ?>
                     <?php else: ?>
-                        <span class="status-badge status-badge-ok" title="Verbindung vollständig">
-                            ✔️ OK
-                        </span>
+                        -
                     <?php endif; ?>
-                </td>
-
-                <td class="actions">
-                    <a href="?module=connections&action=edit&id=<?php echo $conn['id']; ?>" class="button button-small">Bearbeiten</a>
-                    <a href="?module=connections&action=swap&id=<?php echo $conn['id']; ?>" class="button button-small" onclick="return confirm('Von/Nach fuer diese Verbindung vertauschen?');">Von/Nach tauschen</a>
-                    <a href="#" class="button button-small button-danger"
-                        data-confirm-delete="true"
-                        data-confirm-message="Diese Verbindung wirklich löschen?"
-                        data-confirm-feedback="Löschen noch nicht implementiert">
-                        Löschen
-                    </a>
-                </td>
-            </tr>
-            <?php endforeach; ?>
-        </tbody>
-    </table>
-
-    <?php else: ?>
-    <div class="empty-state">
-        <p>Keine Verbindungen gefunden.</p>
-        <p>
-            <a href="?module=connections&action=edit" class="button button-primary">
-                Erste Verbindung anlegen
-            </a>
-        </p>
-    </div>
-    <?php endif; ?>
+                </p>
+                <?php if (!empty($selectedDevicePorts)): ?>
+                    <h4>Ports (max. 12)</h4>
+                    <ul>
+                        <?php foreach ($selectedDevicePorts as $port): ?>
+                            <li><?php echo htmlspecialchars((string)$port['name']); ?></li>
+                        <?php endforeach; ?>
+                    </ul>
+                <?php endif; ?>
+            <?php else: ?>
+                <h3>Ausgewaehltes Geraet</h3>
+                <p><em>Bitte ein Geraet im Filter auswaehlen.</em></p>
+            <?php endif; ?>
+        </section>
+    </aside>
 </div>
 
-<!-- =========================
-     Sidebar / Details
-     ========================= -->
+<style>
+.connections-layout {
+    display: grid;
+    grid-template-columns: minmax(0, 1fr) 320px;
+    gap: 20px;
+    align-items: start;
+}
 
-<aside class="sidebar">
-    <?php if ($selectedDevice): ?>
-        <h3>Ausgewähltes Gerät</h3>
-        <p><strong><?php echo htmlspecialchars($selectedDevice['name']); ?></strong></p>
-        <p>Typ: <?php echo htmlspecialchars($selectedDevice['type_name'] ?? '—'); ?></p>
-        <p>Ports: <?php echo (int)$selectedDevice['port_count']; ?></p>
-        <p>Verbindungen: <?php echo (int)$selectedDevice['connection_count']; ?></p>
-        <p>
-            VLANs:
-            <?php if (!empty($selectedDeviceVlans)): ?>
-                <?php echo htmlspecialchars(implode(', ', $selectedDeviceVlans)); ?>
-            <?php else: ?>
-                —
-            <?php endif; ?>
-        </p>
-        <?php if (!empty($selectedDevicePorts)): ?>
-            <h4>Ports (max. 12)</h4>
-            <ul>
-                <?php foreach ($selectedDevicePorts as $port): ?>
-                    <li><?php echo htmlspecialchars($port['name']); ?></li>
-                <?php endforeach; ?>
-            </ul>
-        <?php endif; ?>
-    <?php else: ?>
-        <p><em>Bitte ein Gerät im Filter auswählen.</em></p>
-    <?php endif; ?>
+.connections-sidebar {
+    position: sticky;
+    top: 92px;
+    display: grid;
+    gap: 12px;
+}
 
-    <!-- TODO: Verbindung bearbeiten / löschen -->
-</aside>
+.sidebar-card {
+    background: #fff;
+    border: 1px solid #e0e6ef;
+    border-radius: 12px;
+    padding: 14px;
+    box-shadow: 0 8px 24px rgba(15, 26, 45, 0.08);
+}
+
+.sidebar-card h3,
+.sidebar-card h4 {
+    margin: 0 0 10px;
+}
+
+.sidebar-card p {
+    margin: 0 0 8px;
+}
+
+.sidebar-actions {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 8px;
+    margin-top: 10px;
+}
+
+.connection-row-selected {
+    background: #edf5ff;
+}
+
+@media (max-width: 1100px) {
+    .connections-layout {
+        grid-template-columns: 1fr;
+    }
+
+    .connections-sidebar {
+        position: static;
+        grid-template-columns: 1fr;
+    }
+}
+</style>

app/modules/dashboard/list.php

@@ -1,15 +1,9 @@
 <?php
 /**
  * modules/dashboard/list.php
- * Dashboard / Startseite - Übersicht über alle Komponenten
+ * Dashboard / Startseite - Uebersicht ueber alle Komponenten
  */
 
-// =========================
-// Statistiken aus DB laden
-// =========================
-
-//TODO eine große zoombare verschiebbare svg wand machen, mit allen punkten drauf. anklicken der punkte erzeugt ein overlay, mit der reingezoomten ansicht zb einem rack
-
 $stats = [
     'devices' => $sql->single("SELECT COUNT(*) as cnt FROM devices", "", [])['cnt'] ?? 0,
     'device_types' => $sql->single("SELECT COUNT(*) as cnt FROM device_types", "", [])['cnt'] ?? 0,
@@ -18,7 +12,6 @@ $stats = [
     'locations' => $sql->single("SELECT COUNT(*) as cnt FROM locations", "", [])['cnt'] ?? 0,
 ];
 
-// Recent devices
 $recentDevices = $sql->get(
     "SELECT d.id, d.name, dt.name as type_name, r.name as rack_name, f.name as floor_name
      FROM devices d
@@ -26,12 +19,41 @@ $recentDevices = $sql->get(
      LEFT JOIN racks r ON d.rack_id = r.id
      LEFT JOIN floors f ON r.floor_id = f.id
      ORDER BY d.id DESC LIMIT 5",
-    "", []
+    "",
+    []
 );
 
+$topologyDevices = $sql->get(
+    "SELECT
+        d.id AS device_id,
+        d.name AS device_name,
+        dt.name AS device_type_name,
+        r.id AS rack_id,
+        r.name AS rack_name,
+        f.id AS floor_id,
+        f.name AS floor_name
+     FROM devices d
+     LEFT JOIN device_types dt ON dt.id = d.device_type_id
+     LEFT JOIN racks r ON r.id = d.rack_id
+     LEFT JOIN floors f ON f.id = r.floor_id
+     ORDER BY floor_name, rack_name, device_name",
+    "",
+    []
+);
+
+$topologyPayload = array_map(static function (array $row): array {
+    return [
+        'device_id' => (int)($row['device_id'] ?? 0),
+        'device_name' => (string)($row['device_name'] ?? ''),
+        'device_type_name' => (string)($row['device_type_name'] ?? ''),
+        'rack_id' => (int)($row['rack_id'] ?? 0),
+        'rack_name' => (string)($row['rack_name'] ?? ''),
+        'floor_id' => (int)($row['floor_id'] ?? 0),
+        'floor_name' => (string)($row['floor_name'] ?? ''),
+    ];
+}, $topologyDevices);
 ?>
 
-<!-- Dashboard / Übersicht -->
 <div class="dashboard">
     <h1>Dashboard</h1>
     <div id="dashboard-modules" class="dashboard-modules"></div>
@@ -39,35 +61,63 @@ $recentDevices = $sql->get(
     <p data-dashboard-warnings class="dashboard-inline-status"></p>
     <p data-dashboard-recent class="dashboard-inline-status"></p>
 
-    <!-- Statistik-Karten -->
+    <section class="topology-wall" id="dashboard-topology-wall">
+        <div class="topology-wall__header">
+            <h2>Gesamt-Topologie-Wand</h2>
+            <div class="topology-wall__tools">
+                <button type="button" class="button button-small" data-topology-zoom="in">+</button>
+                <button type="button" class="button button-small" data-topology-zoom="out">-</button>
+                <button type="button" class="button button-small" data-topology-zoom="reset">Reset</button>
+            </div>
+        </div>
+        <p class="topology-wall__hint">Mausrad zoomt, Ziehen verschiebt. Klick auf einen Punkt zoomt auf den Rack-Kontext und oeffnet die Detailkarte.</p>
+
+        <svg id="dashboard-topology-svg" viewBox="0 0 2400 1400" role="img" aria-label="Topologie-Wand">
+            <rect x="0" y="0" width="2400" height="1400" class="topology-bg"></rect>
+            <g id="dashboard-topology-grid"></g>
+            <g id="dashboard-topology-layer"></g>
+        </svg>
+
+        <div id="dashboard-topology-empty" class="topology-empty" hidden>Keine Geraete vorhanden. Bitte zuerst Geraete erfassen.</div>
+
+        <aside id="dashboard-topology-overlay" class="topology-overlay" hidden>
+            <div class="topology-overlay__header">
+                <h3 data-topology-title>Rack-Detail</h3>
+                <button type="button" class="button button-small" data-topology-close>Schliessen</button>
+            </div>
+            <p data-topology-meta></p>
+            <p data-topology-rack-link></p>
+            <p data-topology-device-link></p>
+        </aside>
+    </section>
+
     <div class="stats-grid">
         <div class="stat-card">
-            <h3><?php echo $stats['locations']; ?></h3>
+            <h3><?php echo (int)$stats['locations']; ?></h3>
             <p>Standorte</p>
-            <a href="?module=floors&action=list">Verwalten →</a>
+            <a href="?module=floors&action=list">Verwalten -></a>
         </div>
 
         <div class="stat-card">
-            <h3><?php echo $stats['device_types']; ?></h3>
-            <p>Gerätetypen</p>
-            <a href="?module=device_types&action=list">Verwalten →</a>
+            <h3><?php echo (int)$stats['device_types']; ?></h3>
+            <p>Geraetetypen</p>
+            <a href="?module=device_types&action=list">Verwalten -></a>
         </div>
 
         <div class="stat-card">
-            <h3><?php echo $stats['devices']; ?></h3>
-            <p>Geräte</p>
-            <a href="?module=devices&action=list">Verwalten →</a>
+            <h3><?php echo (int)$stats['devices']; ?></h3>
+            <p>Geraete</p>
+            <a href="?module=devices&action=list">Verwalten -></a>
         </div>
 
         <div class="stat-card">
-            <h3><?php echo $stats['racks']; ?></h3>
+            <h3><?php echo (int)$stats['racks']; ?></h3>
             <p>Racks</p>
-            <a href="?module=racks&action=list">Verwalten →</a>
+            <a href="?module=racks&action=list">Verwalten -></a>
         </div>
     </div>
 
-    <!-- Zuletzt hinzugefügte Geräte -->
-    <h2>Zuletzt hinzugefügt</h2>
+    <h2>Zuletzt hinzugefuegt</h2>
     <?php if (!empty($recentDevices)): ?>
     <table class="recent-devices">
         <thead>
@@ -82,20 +132,379 @@ $recentDevices = $sql->get(
         <tbody>
             <?php foreach ($recentDevices as $device): ?>
             <tr>
-                <td><?php echo htmlspecialchars($device['name']); ?></td>
-                <td><?php echo htmlspecialchars($device['type_name'] ?? '-'); ?></td>
-                <td><?php echo htmlspecialchars($device['rack_name'] ?? '-'); ?></td>
-                <td><?php echo htmlspecialchars($device['floor_name'] ?? '-'); ?></td>
-                <td><a href="?module=devices&action=edit&id=<?php echo $device['id']; ?>">Bearbeiten</a></td>
+                <td><?php echo htmlspecialchars((string)$device['name']); ?></td>
+                <td><?php echo htmlspecialchars((string)($device['type_name'] ?? '-')); ?></td>
+                <td><?php echo htmlspecialchars((string)($device['rack_name'] ?? '-')); ?></td>
+                <td><?php echo htmlspecialchars((string)($device['floor_name'] ?? '-')); ?></td>
+                <td><a href="?module=devices&action=edit&id=<?php echo (int)$device['id']; ?>">Bearbeiten</a></td>
             </tr>
             <?php endforeach; ?>
         </tbody>
     </table>
     <?php else: ?>
-    <p><em>Noch keine Geräte vorhanden. <a href="?module=device_types&action=list">Starten Sie mit Gerätetypen</a>.</em></p>
+    <p><em>Noch keine Geraete vorhanden. <a href="?module=device_types&action=list">Starten Sie mit Geraetetypen</a>.</em></p>
     <?php endif; ?>
 </div>
 
+<script id="dashboard-topology-data" type="application/json"><?php echo json_encode($topologyPayload, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES); ?></script>
+<script>
+(function () {
+    const root = document.getElementById('dashboard-topology-wall');
+    if (!root) {
+        return;
+    }
+
+    const svg = document.getElementById('dashboard-topology-svg');
+    const gridLayer = document.getElementById('dashboard-topology-grid');
+    const nodeLayer = document.getElementById('dashboard-topology-layer');
+    const emptyNode = document.getElementById('dashboard-topology-empty');
+    const overlay = document.getElementById('dashboard-topology-overlay');
+    const overlayTitle = overlay ? overlay.querySelector('[data-topology-title]') : null;
+    const overlayMeta = overlay ? overlay.querySelector('[data-topology-meta]') : null;
+    const overlayRackLink = overlay ? overlay.querySelector('[data-topology-rack-link]') : null;
+    const overlayDeviceLink = overlay ? overlay.querySelector('[data-topology-device-link]') : null;
+    const closeButton = overlay ? overlay.querySelector('[data-topology-close]') : null;
+
+    const dataTag = document.getElementById('dashboard-topology-data');
+    let nodes = [];
+    try {
+        nodes = JSON.parse((dataTag && dataTag.textContent) || '[]');
+    } catch (error) {
+        nodes = [];
+    }
+
+    const scene = { width: 2400, height: 1400 };
+    let view = { x: 0, y: 0, width: scene.width, height: scene.height };
+    let drag = null;
+
+    function clampView() {
+        view.width = Math.max(220, Math.min(scene.width, view.width));
+        view.height = Math.max(180, Math.min(scene.height, view.height));
+        view.x = Math.max(0, Math.min(scene.width - view.width, view.x));
+        view.y = Math.max(0, Math.min(scene.height - view.height, view.y));
+    }
+
+    function applyView() {
+        clampView();
+        svg.setAttribute('viewBox', `${view.x} ${view.y} ${view.width} ${view.height}`);
+    }
+
+    function toSvgPoint(clientX, clientY) {
+        const rect = svg.getBoundingClientRect();
+        const x = view.x + ((clientX - rect.left) / rect.width) * view.width;
+        const y = view.y + ((clientY - rect.top) / rect.height) * view.height;
+        return { x, y };
+    }
+
+    function zoomAt(anchorX, anchorY, factor) {
+        const nextWidth = view.width * factor;
+        const nextHeight = view.height * factor;
+
+        const ratioX = (anchorX - view.x) / view.width;
+        const ratioY = (anchorY - view.y) / view.height;
+
+        view = {
+            x: anchorX - ratioX * nextWidth,
+            y: anchorY - ratioY * nextHeight,
+            width: nextWidth,
+            height: nextHeight
+        };
+        applyView();
+    }
+
+    function resetView() {
+        view = { x: 0, y: 0, width: scene.width, height: scene.height };
+        applyView();
+    }
+
+    function zoomToNode(x, y) {
+        view = {
+            x: x - 250,
+            y: y - 170,
+            width: 500,
+            height: 340
+        };
+        applyView();
+    }
+
+    function clearLayer(layer) {
+        while (layer.firstChild) {
+            layer.removeChild(layer.firstChild);
+        }
+    }
+
+    function svgElement(name) {
+        return document.createElementNS('http://www.w3.org/2000/svg', name);
+    }
+
+    function drawGrid() {
+        clearLayer(gridLayer);
+        for (let x = 0; x <= scene.width; x += 100) {
+            const line = svgElement('line');
+            line.setAttribute('x1', String(x));
+            line.setAttribute('y1', '0');
+            line.setAttribute('x2', String(x));
+            line.setAttribute('y2', String(scene.height));
+            line.setAttribute('class', 'topology-grid-line');
+            gridLayer.appendChild(line);
+        }
+
+        for (let y = 0; y <= scene.height; y += 100) {
+            const line = svgElement('line');
+            line.setAttribute('x1', '0');
+            line.setAttribute('y1', String(y));
+            line.setAttribute('x2', String(scene.width));
+            line.setAttribute('y2', String(y));
+            line.setAttribute('class', 'topology-grid-line');
+            gridLayer.appendChild(line);
+        }
+    }
+
+    function buildLayout(data) {
+        const floors = new Map();
+
+        data.forEach((entry) => {
+            const floorName = (entry.floor_name || '').trim() || 'Ohne Stockwerk';
+            const rackId = Number(entry.rack_id || 0);
+            const rackName = (entry.rack_name || '').trim() || 'Ohne Rack';
+            const rackKey = `${rackId}:${rackName}`;
+
+            if (!floors.has(floorName)) {
+                floors.set(floorName, new Map());
+            }
+            const racks = floors.get(floorName);
+            if (!racks.has(rackKey)) {
+                racks.set(rackKey, []);
+            }
+            racks.get(rackKey).push(entry);
+        });
+
+        const floorNames = Array.from(floors.keys()).sort((a, b) => a.localeCompare(b));
+        const positioned = [];
+
+        floorNames.forEach((floorName, floorIndex) => {
+            const rackMap = floors.get(floorName);
+            const rackKeys = Array.from(rackMap.keys()).sort((a, b) => a.localeCompare(b));
+            const floorX = 140 + floorIndex * 540;
+
+            positioned.push({ type: 'floor-label', x: floorX, y: 70, label: floorName });
+
+            rackKeys.forEach((rackKey, rackIndex) => {
+                const devices = rackMap.get(rackKey);
+                const [rackIdPart, rackNamePart] = rackKey.split(':');
+                const rackId = Number(rackIdPart || 0);
+                const rackName = rackNamePart || 'Ohne Rack';
+
+                const rackTop = 120 + rackIndex * 180;
+                const rowCount = Math.ceil(Math.max(1, devices.length) / 4);
+                const rackHeight = Math.max(90, 40 + rowCount * 45);
+
+                positioned.push({
+                    type: 'rack-box',
+                    x: floorX - 50,
+                    y: rackTop - 30,
+                    width: 380,
+                    height: rackHeight,
+                    label: rackName,
+                    rack_id: rackId
+                });
+
+                devices.forEach((device, deviceIndex) => {
+                    const col = deviceIndex % 4;
+                    const row = Math.floor(deviceIndex / 4);
+                    const x = floorX + col * 85;
+                    const y = rackTop + row * 40;
+
+                    positioned.push({
+                        type: 'node',
+                        x,
+                        y,
+                        rack_id: Number(device.rack_id || 0),
+                        rack_name: device.rack_name || 'Ohne Rack',
+                        floor_name: device.floor_name || 'Ohne Stockwerk',
+                        device_id: Number(device.device_id || 0),
+                        device_name: device.device_name || 'Unbenannt',
+                        device_type_name: device.device_type_name || ''
+                    });
+                });
+            });
+        });
+
+        return positioned;
+    }
+
+    function showOverlay(node) {
+        if (!overlay || !overlayTitle || !overlayMeta || !overlayRackLink || !overlayDeviceLink) {
+            return;
+        }
+
+        overlayTitle.textContent = node.rack_name || 'Ohne Rack';
+        const typeLabel = node.device_type_name ? ` (${node.device_type_name})` : '';
+        overlayMeta.textContent = `Stockwerk: ${node.floor_name} | Geraet: ${node.device_name}${typeLabel}`;
+
+        if (node.rack_id > 0) {
+            overlayRackLink.innerHTML = `<a href="?module=racks&action=edit&id=${node.rack_id}">Rack bearbeiten</a>`;
+        } else {
+            overlayRackLink.textContent = 'Kein Rack verknuepft';
+        }
+
+        if (node.device_id > 0) {
+            overlayDeviceLink.innerHTML = `<a href="?module=devices&action=edit&id=${node.device_id}">Geraet bearbeiten</a>`;
+        } else {
+            overlayDeviceLink.textContent = '';
+        }
+
+        overlay.hidden = false;
+    }
+
+    function renderTopology() {
+        drawGrid();
+        clearLayer(nodeLayer);
+
+        if (!nodes.length) {
+            if (emptyNode) {
+                emptyNode.hidden = false;
+            }
+            return;
+        }
+
+        if (emptyNode) {
+            emptyNode.hidden = true;
+        }
+
+        const entries = buildLayout(nodes);
+
+        entries.forEach((entry) => {
+            if (entry.type === 'floor-label') {
+                const text = svgElement('text');
+                text.setAttribute('x', String(entry.x));
+                text.setAttribute('y', String(entry.y));
+                text.setAttribute('class', 'topology-floor-label');
+                text.textContent = entry.label;
+                nodeLayer.appendChild(text);
+                return;
+            }
+
+            if (entry.type === 'rack-box') {
+                const rect = svgElement('rect');
+                rect.setAttribute('x', String(entry.x));
+                rect.setAttribute('y', String(entry.y));
+                rect.setAttribute('width', String(entry.width));
+                rect.setAttribute('height', String(entry.height));
+                rect.setAttribute('rx', '10');
+                rect.setAttribute('class', 'topology-rack-box');
+                nodeLayer.appendChild(rect);
+
+                const label = svgElement('text');
+                label.setAttribute('x', String(entry.x + 12));
+                label.setAttribute('y', String(entry.y + 22));
+                label.setAttribute('class', 'topology-rack-label');
+                label.textContent = entry.label;
+                nodeLayer.appendChild(label);
+                return;
+            }
+
+            const circle = svgElement('circle');
+            circle.setAttribute('cx', String(entry.x));
+            circle.setAttribute('cy', String(entry.y));
+            circle.setAttribute('r', '10');
+            circle.setAttribute('tabindex', '0');
+            circle.setAttribute('class', 'topology-node');
+            circle.setAttribute('data-device-id', String(entry.device_id));
+            circle.setAttribute('data-rack-id', String(entry.rack_id));
+
+            const title = svgElement('title');
+            title.textContent = `${entry.device_name} (${entry.floor_name} / ${entry.rack_name})`;
+            circle.appendChild(title);
+
+            const activate = () => {
+                nodeLayer.querySelectorAll('.topology-node.active').forEach((node) => {
+                    node.classList.remove('active');
+                });
+                circle.classList.add('active');
+                zoomToNode(entry.x, entry.y);
+                showOverlay(entry);
+            };
+
+            circle.addEventListener('click', activate);
+            circle.addEventListener('keydown', (event) => {
+                if (event.key === 'Enter' || event.key === ' ') {
+                    event.preventDefault();
+                    activate();
+                }
+            });
+
+            nodeLayer.appendChild(circle);
+        });
+    }
+
+    svg.addEventListener('wheel', (event) => {
+        event.preventDefault();
+        const point = toSvgPoint(event.clientX, event.clientY);
+        const factor = event.deltaY < 0 ? 0.9 : 1.1;
+        zoomAt(point.x, point.y, factor);
+    }, { passive: false });
+
+    svg.addEventListener('pointerdown', (event) => {
+        drag = {
+            startX: event.clientX,
+            startY: event.clientY,
+            baseX: view.x,
+            baseY: view.y
+        };
+        svg.setPointerCapture(event.pointerId);
+    });
+
+    svg.addEventListener('pointermove', (event) => {
+        if (!drag) {
+            return;
+        }
+        const rect = svg.getBoundingClientRect();
+        const scaleX = view.width / rect.width;
+        const scaleY = view.height / rect.height;
+        const dx = (event.clientX - drag.startX) * scaleX;
+        const dy = (event.clientY - drag.startY) * scaleY;
+        view.x = drag.baseX - dx;
+        view.y = drag.baseY - dy;
+        applyView();
+    });
+
+    svg.addEventListener('pointerup', (event) => {
+        drag = null;
+        svg.releasePointerCapture(event.pointerId);
+    });
+
+    svg.addEventListener('pointercancel', (event) => {
+        drag = null;
+        svg.releasePointerCapture(event.pointerId);
+    });
+
+    root.querySelectorAll('[data-topology-zoom]').forEach((button) => {
+        button.addEventListener('click', () => {
+            const action = button.getAttribute('data-topology-zoom');
+            if (action === 'in') {
+                zoomAt(view.x + view.width / 2, view.y + view.height / 2, 0.85);
+                return;
+            }
+            if (action === 'out') {
+                zoomAt(view.x + view.width / 2, view.y + view.height / 2, 1.15);
+                return;
+            }
+            resetView();
+        });
+    });
+
+    if (closeButton && overlay) {
+        closeButton.addEventListener('click', () => {
+            overlay.hidden = true;
+        });
+    }
+
+    renderTopology();
+    applyView();
+})();
+</script>
+
 <style>
 .stats-grid {
     display: grid;
@@ -186,7 +595,8 @@ $recentDevices = $sql->get(
     border-collapse: collapse;
 }
 
-.recent-devices th, .recent-devices td {
+.recent-devices th,
+.recent-devices td {
     padding: 10px;
     text-align: left;
     border-bottom: 1px solid #ddd;
@@ -195,4 +605,134 @@ $recentDevices = $sql->get(
 .recent-devices th {
     background: #f0f0f0;
 }
+
+.topology-wall {
+    margin: 18px 0 26px;
+    border: 1px solid #d6e1f0;
+    border-radius: 10px;
+    background: #fff;
+    padding: 14px;
+    position: relative;
+}
+
+.topology-wall__header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    gap: 12px;
+}
+
+.topology-wall__header h2 {
+    margin: 0;
+}
+
+.topology-wall__tools {
+    display: flex;
+    gap: 6px;
+}
+
+.topology-wall__hint {
+    margin: 8px 0 10px;
+    color: #445067;
+}
+
+#dashboard-topology-svg {
+    width: 100%;
+    height: 460px;
+    border: 1px solid #d7dee9;
+    border-radius: 8px;
+    background: #f8fbff;
+    cursor: grab;
+    touch-action: none;
+}
+
+#dashboard-topology-svg:active {
+    cursor: grabbing;
+}
+
+.topology-bg {
+    fill: #f7faff;
+}
+
+.topology-grid-line {
+    stroke: #e4ebf5;
+    stroke-width: 1;
+}
+
+.topology-floor-label {
+    font-size: 28px;
+    font-weight: 700;
+    fill: #23304a;
+}
+
+.topology-rack-box {
+    fill: #ffffff;
+    stroke: #bfd0e6;
+    stroke-width: 2;
+}
+
+.topology-rack-label {
+    font-size: 16px;
+    font-weight: 600;
+    fill: #2a3d5c;
+}
+
+.topology-node {
+    fill: #1f73c9;
+    stroke: #ffffff;
+    stroke-width: 3;
+}
+
+.topology-node:hover,
+.topology-node:focus,
+.topology-node.active {
+    fill: #e5572e;
+    outline: none;
+}
+
+.topology-empty {
+    margin-top: 12px;
+    padding: 10px;
+    background: #f4f7fb;
+    border: 1px dashed #b8c7dd;
+    border-radius: 8px;
+}
+
+.topology-overlay {
+    position: absolute;
+    right: 16px;
+    bottom: 16px;
+    width: min(360px, calc(100% - 32px));
+    border: 1px solid #cad8ea;
+    border-radius: 10px;
+    background: #ffffff;
+    box-shadow: 0 12px 34px rgba(12, 42, 84, 0.2);
+    padding: 12px;
+}
+
+.topology-overlay__header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    gap: 10px;
+}
+
+.topology-overlay__header h3 {
+    margin: 0;
+}
+
+.topology-overlay p {
+    margin: 8px 0;
+}
+
+@media (max-width: 900px) {
+    #dashboard-topology-svg {
+        height: 360px;
+    }
+
+    .topology-wall__header {
+        flex-direction: column;
+        align-items: flex-start;
+    }
+}
 </style>

app/templates/header.php

@@ -21,6 +21,7 @@
 
     <!-- JS -->
     <script src="/assets/js/app.js" defer></script>
+    <script src="/assets/js/dashboard.js" defer></script>
     <script src="/assets/js/svg-editor.js" defer></script>
     <script src="/assets/js/network-view.js" defer></script>