Merge origin/main: Review-Branch mit v2.4.0-Features zusammenführen

Konfliktauflösung kombiniert beide Seiten:
- Auth: Secure-Cookie-Flag + DB-Session-Handler (main)
- UniFiController: createVouchers (n-Parameter, 1 API-Call) + QoS-Optionen (main)
- index.php: IP-Rate-Limit/PRG/Sticky-Forms + CAPTCHA/SMS/QoS/Tageslimit (main)
- users.php: 2FA-Reset (main) auf POST+PRG umgestellt wie übrige Aktionen
- forgot_password: Session-Throttle (main) + IP-Throttle kombiniert
- Eigene Migrationen wegen Nummernkollision auf 0005/0006 umbenannt

https://claude.ai/code/session_01KKVpVPJjrTKGoRgpJcySD4

.github/workflows/ci.yml

@@ -0,0 +1,57 @@
+name: CI
+
+on:
+  push:
+    branches: [ "**" ]
+  pull_request:
+
+jobs:
+  lint:
+    name: PHP Lint
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php: [ "7.4", "8.2" ]
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup PHP ${{ matrix.php }}
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: pdo, pdo_mysql, curl, mbstring, json
+          coverage: none
+
+      - name: Syntax check all PHP files
+        run: |
+          set -e
+          find . -name '*.git' -prune -o -name '*.php' -print | while read -r f; do
+            php -l "$f"
+          done
+
+      - name: Validate JSON language/migration assets
+        run: |
+          php -r 'foreach (glob("lang/*.php") as $f) { $a = require $f; if (!is_array($a)) { fwrite(STDERR, "Bad lang file: $f\n"); exit(1);} } echo "lang OK\n";'
+
+  test:
+    name: Unit Tests & Static Analysis
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup PHP 8.2
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: "8.2"
+          extensions: pdo, pdo_mysql, curl, mbstring, json
+          tools: composer
+          coverage: none
+
+      - name: Install dependencies
+        run: composer install --no-interaction --no-progress
+
+      - name: PHPUnit
+        run: vendor/bin/phpunit
+
+      - name: PHPStan
+        run: vendor/bin/phpstan analyse --no-progress

.github/workflows/docker-publish.yml

@@ -0,0 +1,39 @@
+name: Docker Publish
+
+on:
+  push:
+    tags: [ "v*" ]
+  workflow_dispatch:
+
+jobs:
+  build-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/${{ github.repository }}
+          tags: |
+            type=ref,event=tag
+            type=raw,value=latest
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}