Stand 2026-04-13: PHP/MySQL Infrastruktur, Flussmanagement, Stadt-Prototyp

- PHP/MySQL Backend (XAMPP + Produktionsserver)
- Front-Controller, API-Endpunkte, Session-Management
- Flussmanagement-Simulation (Echtzeit, Punkt-basierter Fluss)
- Stadt & Raumplanung (Prototyp, Top-Down Kachelsystem)
- Klimawaechter 3D: Deiche kleiner, Baeume kippen, Budget angepasst
- persistence.ts: Dualer Speicher (localStorage + Server-API)
- 6 Unit-Test-Dateien fuer bestehende Simulationen

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

App/php/api/dashboard.php

@@ -0,0 +1,68 @@
+<?php
+/**
+ * API: Lehrkraefte-Dashboard Daten
+ * GET /api/dashboard?class_id=X
+ */
+
+header('Content-Type: application/json; charset=utf-8');
+
+if ($_SERVER['REQUEST_METHOD'] !== 'GET') {
+    Response::error('Nur GET erlaubt', 405);
+}
+
+$teacherId = Session::requireTeacher();
+$db = Database::get();
+
+$classId = (int)($_GET['class_id'] ?? 0);
+
+// Verifizieren dass die Klasse dem Lehrer gehoert
+if ($classId) {
+    $class = $db->fetchOne(
+        'SELECT * FROM classes WHERE id = ? AND teacher_id = ?',
+        [$classId, $teacherId]
+    );
+    if (!$class) Response::error('Klasse nicht gefunden', 404);
+}
+
+// Klassen des Lehrers
+$classes = $db->fetchAll('SELECT * FROM classes WHERE teacher_id = ? ORDER BY created_at DESC', [$teacherId]);
+
+if (!$classId && !empty($classes)) {
+    $classId = $classes[0]['id'];
+}
+
+// Aktive Schueler (letzte 60 Minuten)
+$activeStudents = $db->fetchAll(
+    'SELECT id, display_name, last_seen FROM student_sessions
+     WHERE class_id = ? AND last_seen > DATE_SUB(NOW(), INTERVAL 60 MINUTE)
+     ORDER BY last_seen DESC',
+    [$classId]
+);
+
+// Alle Schueler der Klasse
+$allStudents = $db->fetchAll(
+    'SELECT id, display_name, created_at, last_seen FROM student_sessions WHERE class_id = ? ORDER BY display_name',
+    [$classId]
+);
+
+// Assessments fuer diese Klasse
+$assessments = $db->fetchAll(
+    'SELECT a.*, s.display_name FROM assessments a
+     JOIN student_sessions s ON s.id = a.session_id
+     WHERE a.class_id = ?
+     ORDER BY a.submitted_at DESC
+     LIMIT 100',
+    [$classId]
+);
+
+// Modulfreigaben
+$modules = $db->fetchAll('SELECT * FROM class_modules WHERE class_id = ?', [$classId]);
+
+Response::ok([
+    'classes'        => $classes,
+    'currentClassId' => $classId,
+    'activeStudents' => $activeStudents,
+    'allStudents'    => $allStudents,
+    'assessments'    => $assessments,
+    'modules'        => $modules,
+]);