Reorganize into monorepo layout, move mitarbeiter-app to legacy reference

Consolidates the previously separate omsorgapp and omsorgCore repos
(each had their own nested .git with GitHub history) plus the old
root-level website/mitarbeiter-app into a single monorepo, matching
the structure already documented in the root CLAUDE.md. Also moves
the PHP employee app aside as omsorgWeb/mitarbeiter-app-legacy/ to
serve as a template for a ground-up rewrite.

Fixes .gitignore in the same pass: the config-secrets/uploads/data
patterns were unanchored (relative to repo root, not depth-agnostic),
so they silently stopped matching once the app moved under omsorgWeb/.
Patterns are now **/-prefixed and cover both mitarbeiter-app and
mitarbeiter-app-legacy, keeping DB/SMTP credentials and uploaded
employee documents out of version control.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

omsorgWeb/mitarbeiter-app-legacy/actions/submit-fortbildungsantrag.php

@@ -0,0 +1,73 @@
+<?php
+require_once __DIR__ . '/../lib/auth.php';
+require_once __DIR__ . '/../lib/upload.php';
+require_once __DIR__ . '/../lib/mail.php';
+require_login();
+
+if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
+    header('Location: ../pages/fortbildungsantrag.php');
+    exit;
+}
+
+$back = '../pages/fortbildungsantrag.php';
+
+$anliegen  = trim($_POST['anliegen']  ?? '');
+$thema     = trim($_POST['thema']     ?? '');
+$nachricht = trim($_POST['nachricht'] ?? '');
+
+$allowed_anliegen = ['wbl_pdl', 'fortbildung', 'pflichtschulung'];
+if (!in_array($anliegen, $allowed_anliegen, true)) {
+    redirect_error($back, 'Bitte ein Anliegen auswählen.');
+}
+
+if ($thema === '') {
+    redirect_error($back, 'Bitte ein Thema angeben.');
+}
+
+$up = handle_upload($_FILES['datei'] ?? [], [
+    'allowed'  => UPLOAD_TYPES_DOCS,
+    'dir'      => dirname(__DIR__) . '/uploads/',
+    'prefix'   => 'fortbildung',
+    'required' => false,
+]);
+if (!$up['ok']) {
+    redirect_error($back, $up['error']);
+}
+
+$filename      = $up['filename'] ?? '';
+$original_name = $up['original_name'] ?? '';
+$mime          = $up['mime'] ?? null;
+
+$user_id = current_user()['id'];
+$now     = date('c');
+
+db()->prepare(
+    'INSERT INTO requests_fortbildungsantrag
+        (user_id, status, admin_note, anliegen, thema, nachricht, filename, original_name, created_at, updated_at)
+     VALUES (?, \'pending\', \'\', ?, ?, ?, ?, ?, ?, ?)'
+)->execute([$user_id, $anliegen, $thema, $nachricht, $filename, $original_name, $now, $now]);
+
+$anliegen_labels = [
+    'wbl_pdl'         => 'WBL / PDL',
+    'fortbildung'     => 'Fortbildung',
+    'pflichtschulung' => 'Pflichtschulung',
+];
+
+$config  = require __DIR__ . '/../lib/config.php';
+$attach  = ($filename !== '')
+    ? ['path' => dirname(__DIR__) . '/uploads/' . $filename, 'name' => $original_name, 'mime' => $mime]
+    : [];
+smtp_send(
+    $config,
+    $config['mail_info'],
+    'Neuer Fortbildungsantrag: ' . current_name(),
+    "Ein Fortbildungsantrag wurde eingereicht.\n\n"
+        . 'Mitarbeiter: ' . current_name() . "\n"
+        . 'Anliegen: ' . ($anliegen_labels[$anliegen] ?? $anliegen) . "\n"
+        . 'Thema: ' . $thema . "\n"
+        . 'Nachricht: ' . ($nachricht ?: '—') . "\n\n"
+        . "---\nGesendet über OMSORG Connect",
+    $attach
+);
+
+redirect_ok($back);