chore: bump version to v0.7.75

.docker-compose.runtime.override.yml

@@ -1,8 +1,6 @@
 services:
   app:
-    working_dir: /app/Web
+    image: ghcr.io/aiirondev/legendary-octo-garbanzo:v0.7.42
-    command: ["gunicorn", "app:app", "--bind", "0.0.0.0:8000", "--workers", "4", "--threads", "2", "--timeout", "30", "--graceful-timeout", "20", "--worker-connections", "100", "--max-requests", "200", "--max-requests-jitter", "50", "--log-level", "info", "--access-logfile", "-", "--error-logfile", "-"]
-    image: ghcr.io/aiirondev/legendary-octo-garbanzo:latest
     build: null
     ports:
       - "10000:8000"

.github/workflows/release-docker.yml

@@ -134,14 +134,22 @@ jobs:
             echo "push_dev=false" >> "$GITHUB_OUTPUT"
           fi
 
+      - name: Update .release-version file
+        run: |
+          echo "${{ steps.meta.outputs.tag }}" > .release-version
+          cat .release-version
+
       - name: Create and push tag for manual releases
         if: github.event_name == 'workflow_dispatch'
         run: |
           TAG="${{ steps.meta.outputs.tag }}"
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add .release-version
+          git commit -m "chore: bump version to $TAG" || true
           git tag "$TAG"
           git push origin "$TAG"
+          git push origin HEAD:${{ github.ref_name }}
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
@@ -198,6 +206,17 @@ jobs:
 
       # development tar omitted: dev releases will be versioned (vX.Y.Z-dev) and handled by update.sh using the tag
 
+      - name: Commit .release-version for tag pushes
+        if: github.event_name == 'push'
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          if ! git diff --quiet .release-version; then
+            git add .release-version
+            git commit -m "chore: update version to ${{ steps.meta.outputs.tag }}"
+            git push origin HEAD:${{ github.ref_name }}
+          fi
+
       - name: Create release-only docker bundle
         run: |
           mkdir -p release-bundle

.release-version

@@ -1 +1 @@
-v0.7.42
+v0.7.75

Web/app.py

@@ -45,7 +45,7 @@ if _CURRENT_DIR not in sys.path:
 import Web.modules.database.user as us
 import Web.modules.database.items as it
 import Web.modules.database.ausleihung as au
-import Web.modules.logs.audit_log as al
+import Web.modules.log.audit_log as al
 import push_notifications as pn
 import Web.modules.inventarsystem.pdf_export as pdf_export 
 import datetime
@@ -120,7 +120,7 @@ app.wsgi_app = ProxyFix(app.wsgi_app, x_for=1, x_proto=1, x_host=1, x_port=1)
 """--------------------------------------------------------------Path Init-------------------------------------------------------"""
 
 if not os.path.exists(app.config['UPLOAD_FOLDER']):
-    os.makedirs(app.config['UPLOAD_FOLDER'])
+    os.makedirs(app.config['UPLOAD_FOLDER'], exist_ok=True)
 # QR Code directory creation deactivated
 # if not os.path.exists(app.config['QR_CODE_FOLDER']):
 #     os.makedirs(app.config['QR_CODE_FOLDER'])
@@ -2415,11 +2415,7 @@ def preview_file(filename):
         if denied:
             return denied
 
-        # Check production path first
-        prod_path = "/var/Inventarsystem/Web/previews"
         dev_path = app.config['PREVIEW_FOLDER']
-        if os.path.exists(os.path.join(prod_path, filename)):
-            return send_from_directory(prod_path, filename)
         if os.path.exists(os.path.join(dev_path, filename)):
             return send_from_directory(dev_path, filename)
             
@@ -2798,7 +2794,7 @@ def library_export_excel(scope='all'):
     client.close()
     
     excel_file = excel_export.generate_library_excel(items)
-    return flask.send_file(
+    return send_file(
         excel_file,
         mimetype='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
         as_attachment=True,
@@ -4181,6 +4177,7 @@ def logout():
     session.pop('is_admin', None)
     session.pop('favorites', None)
     session.pop('favorites_owner', None)
+    session.pop('tenant_id', None)
     return redirect(url_for('login'))
 
 

Web/modules/database/ausleihung.py

@@ -103,7 +103,7 @@ def get_current_status(ausleihung, log_changes=False, user=None):
     if log_changes and new_status != original_status and '_id' in ausleihung:
         try:
             # Importieren Sie das Modul nur bei Bedarf, um zirkuläre Importe zu vermeiden
-            import Web.modules.logs.ausleihung_log as ausleihung_log
+            import Web.modules.log.ausleihung_log as ausleihung_log
             ausleihung_log.log_status_change(
                 str(ausleihung['_id']), 
                 original_status, 

Web/modules/database/user.py

@@ -12,6 +12,7 @@ Provides methods for creating, validating, and retrieving user information.
 '''
 import hashlib
 import copy
+import importlib
 import logging
 import re
 import secrets
@@ -59,6 +60,35 @@ def _get_tenant_db(client):
         return client[cfg.MONGODB_DB]
 
 
+def _has_tenant_configs():
+    for module_name in ('tenant', 'Web.tenant'):
+        try:
+            tenant_module = importlib.import_module(module_name)
+            tenant_registry = getattr(tenant_module, 'TENANT_REGISTRY', None)
+            if isinstance(tenant_registry, dict) and tenant_registry:
+                return True
+        except Exception:
+            continue
+    return isinstance(getattr(cfg, 'TENANT_CONFIGS', None), dict) and bool(cfg.TENANT_CONFIGS)
+
+
+def _resolve_request_tenant_db():
+    for module_name in ('tenant', 'Web.tenant'):
+        try:
+            tenant_module = importlib.import_module(module_name)
+            get_tenant_context = getattr(tenant_module, 'get_tenant_context', None)
+            if not callable(get_tenant_context):
+                continue
+            ctx = get_tenant_context()
+            if ctx and ctx.tenant_id:
+                return ctx.db_name or ctx.resolve_tenant(), ctx.tenant_id
+            if ctx and ctx.db_name and not _has_tenant_configs():
+                return ctx.db_name, None
+        except Exception as exc:
+            logger.debug("Tenant context import %s failed: %s", module_name, exc)
+    return None, None
+
+
 def build_name_synonym(first_name, last_name=''):
     """Build a deterministic, non-personalized short alias from 2 letters each."""
     first = _clean_name_fragment(first_name)
@@ -424,22 +454,26 @@ def check_nm_pwd(username, password):
     Returns:
         dict: User document if credentials are valid, None otherwise
     """
-    db_name = cfg.MONGODB_DB
+    db_name, tenant_id = _resolve_request_tenant_db()
-    tenant_db = None
     ctx = None
     try:
         from tenant import get_tenant_context
         ctx = get_tenant_context()
-        if ctx and ctx.tenant_id:
+    except Exception:
-            tenant_db = ctx.db_name or ctx.resolve_tenant()
+        ctx = None
-            db_name = tenant_db
+
-    except Exception as exc:
+    if not db_name:
-        logger.exception(f"Failed to resolve tenant context in check_nm_pwd: {exc}")
+        if _has_tenant_configs():
+            logger.warning(
+                "Refusing default DB fallback for login because tenant configs exist and no tenant was resolved."
+            )
+            return None
+        db_name = cfg.MONGODB_DB
 
     logger.info(
         "check_nm_pwd start: username=%r tenant=%r db=%r host=%r port=%r uri=%r",
         username,
-        ctx.tenant_id if ctx else None,
+        tenant_id,
         db_name,
         cfg.MONGODB_HOST,
         cfg.MONGODB_PORT,
@@ -644,15 +678,17 @@ def get_user(username):
             return users.find_one({'Username': username}) or users.find_one({'username': username})
 
         # Try current tenant first when available
-        try:
+        tenant_db, tenant_id = _resolve_request_tenant_db()
-            from tenant import get_tenant_context
+        if tenant_db:
-            ctx = get_tenant_context()
+            user = find_in_db(tenant_db)
-            if ctx and ctx.db_name:
+            if user:
-                user = find_in_db(ctx.db_name)
+                return user
-                if user:
+
-                    return user
+        if _has_tenant_configs() and tenant_db is None:
-        except Exception:
+            logger.warning(
-            pass
+                "Refusing default DB fallback for user lookup because tenant configs exist and no tenant was resolved."
+            )
+            return None
 
         # Fallback to default configured database
         user = find_in_db(cfg.MONGODB_DB)

Web/modules/log/__init__.py

@@ -0,0 +1 @@
+# Web.modules.log package initialization

Web/modules/log/audit_log.py

@@ -0,0 +1,149 @@
+"""
+Tamper-evident audit logging helpers.
+
+The audit chain stores each entry with a hash of the previous entry.
+Any mutation in history breaks the chain verification.
+"""
+
+import datetime
+import hashlib
+import json
+import random
+import time
+
+from pymongo.errors import DuplicateKeyError
+
+
+def _stable_json(value):
+    """Serialize dictionaries in a stable way for deterministic hashing."""
+    return json.dumps(value, sort_keys=True, separators=(",", ":"), ensure_ascii=False, default=str)
+
+
+def _entry_hash(prev_hash, payload):
+    """Build the chained entry hash from previous hash + canonical payload."""
+    base = f"{prev_hash}|{_stable_json(payload)}"
+    return hashlib.sha256(base.encode("utf-8")).hexdigest()
+
+
+def append_audit_event(db, event_type, actor, payload, request_ip=None, source="web", max_retries=5):
+    """
+    Append an audit event to a tamper-evident chain.
+
+    Args:
+        db: MongoDB database handle.
+        event_type (str): Event category.
+        actor (str): User/system who performed the action.
+        payload (dict): Event details.
+        request_ip (str, optional): Request origin.
+        source (str): Source subsystem.
+
+    Returns:
+        dict: Inserted audit entry.
+    """
+    logs = db["audit_log"]
+    attempts = 0
+
+    while attempts <= max_retries:
+        previous = logs.find_one(sort=[("chain_index", -1)])
+        prev_hash = previous.get("entry_hash", "") if previous else ""
+        chain_index = int(previous.get("chain_index", 0)) + 1 if previous else 1
+
+        timestamp = datetime.datetime.utcnow()
+        entry_payload = {
+            "event_type": event_type,
+            "actor": actor or "system",
+            "source": source,
+            "ip": request_ip or "",
+            "payload": payload or {},
+            "timestamp": timestamp.isoformat() + "Z",
+        }
+
+        entry_hash = _entry_hash(prev_hash, entry_payload)
+
+        entry = {
+            **entry_payload,
+            "created_at": timestamp,
+            "prev_hash": prev_hash,
+            "entry_hash": entry_hash,
+            "chain_index": chain_index,
+        }
+
+        try:
+            logs.insert_one(entry)
+            return entry
+        except DuplicateKeyError:
+            attempts += 1
+            if attempts > max_retries:
+                raise
+            # Exponential backoff with jitter to avoid retry storms.
+            delay = min(0.25, (0.005 * (2 ** attempts)) + random.random() * 0.01)
+            time.sleep(delay)
+
+
+def ensure_audit_indexes(db):
+    """Create indexes required for fast and safe audit operations."""
+    logs = db["audit_log"]
+    logs.create_index("chain_index", unique=True, name="audit_chain_index_unique")
+    logs.create_index("created_at", name="audit_created_at_idx")
+    logs.create_index("event_type", name="audit_event_type_idx")
+
+
+def verify_audit_chain(db):
+    """Verify hash chain integrity across all stored audit entries."""
+    logs = db["audit_log"]
+    entries = list(logs.find({}, {"_id": 1, "event_type": 1, "actor": 1, "source": 1, "ip": 1, "payload": 1, "timestamp": 1, "prev_hash": 1, "entry_hash": 1, "chain_index": 1}).sort("chain_index", 1))
+
+    previous_hash = ""
+    previous_index = 0
+    mismatches = []
+
+    for entry in entries:
+        chain_index = int(entry.get("chain_index", 0))
+        prev_hash = entry.get("prev_hash", "")
+        entry_hash = entry.get("entry_hash", "")
+
+        payload = {
+            "event_type": entry.get("event_type", ""),
+            "actor": entry.get("actor", ""),
+            "source": entry.get("source", ""),
+            "ip": entry.get("ip", ""),
+            "payload": entry.get("payload", {}),
+            "timestamp": entry.get("timestamp", ""),
+        }
+
+        expected_hash = _entry_hash(previous_hash, payload)
+
+        if chain_index != previous_index + 1:
+            mismatches.append({
+                "chain_index": chain_index,
+                "error": "chain_index_gap",
+                "expected": previous_index + 1,
+                "found": chain_index,
+            })
+
+        if prev_hash != previous_hash:
+            mismatches.append({
+                "chain_index": chain_index,
+                "error": "prev_hash_mismatch",
+                "expected": previous_hash,
+                "found": prev_hash,
+            })
+
+        if entry_hash != expected_hash:
+            mismatches.append({
+                "chain_index": chain_index,
+                "error": "entry_hash_mismatch",
+                "expected": expected_hash,
+                "found": entry_hash,
+            })
+
+        previous_hash = entry_hash
+        previous_index = chain_index
+
+    return {
+        "ok": len(mismatches) == 0,
+        "count": len(entries),
+        "last_chain_index": previous_index,
+        "last_hash": previous_hash,
+        "mismatches": mismatches,
+    }

Web/modules/log/ausleihung_log.py

@@ -0,0 +1,45 @@
+'''
+   Copyright 2025-2026 AIIrondev
+
+   Licensed under the Inventarsystem EULA (Endbenutzer-Lizenzvertrag).
+   See Legal/LICENSE for the full license text.
+   Unauthorized commercial use, SaaS hosting, or removal of branding is prohibited.
+   For commercial licensing inquiries: https://github.com/AIIrondev
+'''
+"""
+Funktion zum Protokollieren von Statusänderungen bei Ausleihungen
+"""
+import os
+import datetime
+from bson.objectid import ObjectId
+
+def log_status_change(ausleihung_id, old_status, new_status, user=None):
+    """
+    Protokolliert eine Statusänderung einer Ausleihung in einer Log-Datei.
+    
+    Args:
+        ausleihung_id: Die ID der Ausleihung
+        old_status: Der alte Status
+        new_status: Der neue Status
+        user: Der Benutzer, der die Änderung vorgenommen hat (optional)
+    """
+    try:
+        # Erstelle Log-Verzeichnis, falls es nicht existiert
+        log_dir = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), 'logs')
+        if not os.path.exists(log_dir):
+            os.makedirs(log_dir)
+        
+        # Log-Datei für Statusänderungen
+        log_file = os.path.join(log_dir, 'ausleihungen_status_changes.log')
+        
+        # Protokolliere die Änderung
+        timestamp = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
+        user_info = f" by {user}" if user else ""
+        
+        with open(log_file, 'a', encoding='utf-8') as f:
+            f.write(f"{timestamp}: Ausleihung {ausleihung_id} - Status changed from '{old_status}' to '{new_status}'{user_info}\n")
+            
+        return True
+    except Exception as e:
+        print(f"Fehler beim Protokollieren der Statusänderung: {e}")
+        return False

Web/tenant.py

@@ -7,11 +7,12 @@ Supports subdomain-based tenant identification and per-tenant database namespaci
 Each tenant can support up to 20+ users with isolated data and resource pools.
 """
 
-from flask import request, g, has_request_context
+from flask import request, g, session, has_request_context
 from functools import wraps
 import logging
 import os
 import re
+import ipaddress
 import Web.modules.database.settings as cfg
 from Web.modules.database.settings import MongoClient
 
@@ -88,6 +89,33 @@ def _tenant_id_for_port(port):
     return None
 
 
+def _find_registered_tenant_id(candidate):
+    candidate = str(candidate or '').strip()
+    if not candidate:
+        return None
+
+    if candidate in TENANT_REGISTRY:
+        return candidate
+
+    lowered = candidate.lower()
+    for tenant_id in TENANT_REGISTRY:
+        if str(tenant_id).lower() == lowered:
+            return tenant_id
+
+    return None
+
+
+def _is_ip_host(hostname):
+    hostname = str(hostname or '').strip()
+    if not hostname:
+        return False
+    try:
+        ipaddress.ip_address(hostname)
+        return True
+    except ValueError:
+        return False
+
+
 def get_tenant_config(tenant_id=None):
     """Return the registered config for a tenant, falling back to default."""
     if tenant_id is None:
@@ -113,6 +141,28 @@ def _normalize_db_name(db_name):
     return db_name
 
 
+def _module_name_candidates(module_name):
+    normalized = str(module_name or '').strip().lower().replace('-', '_')
+    if not normalized:
+        return []
+
+    candidates = [normalized]
+    alias_groups = {
+        'inventory': {'inventory', 'inventar'},
+        'library': {'library', 'bib', 'bibliothek'},
+        'student_cards': {'student_cards', 'studentcards', 'schuelerausweise', 'schueler_ausweise'},
+    }
+
+    for canonical_name, aliases in alias_groups.items():
+        if normalized in aliases:
+            for alias in (canonical_name, *sorted(aliases)):
+                if alias not in candidates:
+                    candidates.append(alias)
+            break
+
+    return candidates
+
+
 def _tenant_db_aliases(tenant_id):
     aliases = []
     env_map = _parse_tenant_db_map()
@@ -153,8 +203,12 @@ def _resolve_db_alias(tenant_id, db_name):
 def is_tenant_module_enabled(module_name, tenant_id=None, default=False):
     """Resolve whether a feature module is enabled for the current tenant."""
     config = get_tenant_config(tenant_id)
-    enabled = _get_nested_value(config, ['modules', module_name, 'enabled'], default)
+    for candidate_name in _module_name_candidates(module_name):
-    return bool(enabled)
+        enabled = _get_nested_value(config, ['modules', candidate_name, 'enabled'], None)
+        if enabled is not None:
+            return bool(enabled)
+
+    return bool(default)
 
 
 class TenantContext:
@@ -181,13 +235,15 @@ class TenantContext:
         # Priority 1: X-Tenant-ID header (for testing/internal APIs)
         tenant_from_header = request.headers.get('X-Tenant-ID', '').strip()
         if tenant_from_header:
-            self.tenant_id = tenant_from_header
+            matched_tenant = _find_registered_tenant_id(tenant_from_header) or tenant_from_header
-            self.config = get_tenant_config(tenant_from_header)
+            self.tenant_id = matched_tenant
-            return self._get_db_name(tenant_from_header)
+            self.config = get_tenant_config(matched_tenant)
+            session['tenant_id'] = matched_tenant
+            return self._get_db_name(matched_tenant)
 
         # Priority 2: Port-based tenant mapping
         host = request.host.lower()
-        _, port = _parse_port_from_host(host)
+        hostname, port = _parse_port_from_host(host)
         self.port = port
         logger.info(f"Tenant resolution start: request.host={host} request.headers={dict(request.headers)}")
         if port:
@@ -195,6 +251,7 @@ class TenantContext:
             if tenant_from_port:
                 self.tenant_id = tenant_from_port
                 self.config = get_tenant_config(tenant_from_port)
+                session['tenant_id'] = tenant_from_port
                 logger.info(
                     f"Tenant resolution by port: host={host} port={port} tenant={tenant_from_port} config={self.config}"
                 )
@@ -202,24 +259,46 @@ class TenantContext:
             logger.info(f"Tenant port not mapped: host={host} port={port}")
 
         # Priority 3: Subdomain extraction
-        parts = host.split('.')
+        host_without_port = (hostname or '').strip().lower()
+        direct_host_match = _find_registered_tenant_id(host_without_port)
+        if direct_host_match:
+            self.subdomain = host_without_port
+            self.tenant_id = direct_host_match
+            self.config = get_tenant_config(direct_host_match)
+            session['tenant_id'] = direct_host_match
+            logger.info(
+                f"Tenant resolution by direct host match: host={host} tenant={direct_host_match} config={self.config}"
+            )
+            return self._get_db_name(direct_host_match)
 
-        # Extract subdomain from host
+        if host_without_port and not _is_ip_host(host_without_port):
-        # Examples: schule1.example.com → schule1
+            parts = host_without_port.split('.')
-        #          app.example.com → app (skip wildcard/app)
+            if len(parts) >= 2:
-        if len(parts) >= 3:
+                potential_subdomain = parts[0]
-            potential_subdomain = parts[0]
+                if potential_subdomain not in ('www', 'api', 'admin', 'app', 'mail'):
+                    matched_tenant = _find_registered_tenant_id(potential_subdomain)
+                    if matched_tenant:
+                        self.subdomain = potential_subdomain
+                        self.tenant_id = matched_tenant
+                        self.config = get_tenant_config(matched_tenant)
+                        session['tenant_id'] = matched_tenant
+                        logger.info(
+                            f"Tenant resolution by subdomain: host={host} tenant={matched_tenant} config={self.config}"
+                        )
+                        return self._get_db_name(matched_tenant)
+                    logger.info(f"Tenant subdomain not registered: {potential_subdomain}")
+                else:
+                    logger.info(f"Tenant subdomain ignored: {potential_subdomain}")
 
-            # Filter out common non-tenant subdomains
+        # Priority 4: sticky tenant from the authenticated session
-            if potential_subdomain not in ('www', 'api', 'admin', 'app', 'mail'):
+        session_tenant = session.get('tenant_id', '').strip() if session.get('tenant_id') else ''
-                self.subdomain = potential_subdomain
+        if session_tenant:
-                self.tenant_id = potential_subdomain
+            self.tenant_id = session_tenant
-                self.config = get_tenant_config(potential_subdomain)
+            self.config = get_tenant_config(session_tenant)
-                logger.info(
+            logger.info(
-                    f"Tenant resolution by subdomain: host={host} tenant={potential_subdomain} config={self.config}"
+                f"Tenant resolution by session: host={host} tenant={session_tenant} config={self.config}"
-                )
+            )
-                return self._get_db_name(potential_subdomain)
+            return self._get_db_name(session_tenant)
-            logger.info(f"Tenant subdomain ignored: {potential_subdomain}")
 
         # Fallback to default tenant if no tenant identifier found.
         # If no explicit 'default' tenant config exists, use configured MongoDB DB.

manage-tenant.sh

@@ -9,7 +9,9 @@ if [ ! -f "docker-compose-multitenant.yml" ]; then
     exit 1
 fi
 
-CONFIG_FILE="$PWD/config.json"
+# Resolve script directory so config paths are deterministic even when called via sudo
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+CONFIG_FILE="$SCRIPT_DIR/config.json"
 
 ensure_runtime_config_json() {
     local config_path backup_path
@@ -70,6 +72,24 @@ show_help() {
     exit 1
 }
 
+tenant_aliases() {
+    local tenant_id="$1"
+    local normalized alias
+    normalized="$(printf '%s' "$tenant_id" | tr '[:upper:]' '[:lower:]')"
+    printf '%s\n' "$tenant_id"
+    if [[ "$normalized" == schule* ]]; then
+        alias="school${normalized#schule}"
+        if [[ "$alias" != "$tenant_id" ]]; then
+            printf '%s\n' "$alias"
+        fi
+    elif [[ "$normalized" == school* ]]; then
+        alias="schule${normalized#school}"
+        if [[ "$alias" != "$tenant_id" ]]; then
+            printf '%s\n' "$alias"
+        fi
+    fi
+}
+
 register_tenant_port() {
     local tenant_id="$1"
     local port="$2"
@@ -85,15 +105,25 @@ with open(path, 'r', encoding='utf-8') as f:
 tenants = cfg.get('tenants')
 if tenants is None or not isinstance(tenants, dict):
     tenants = {}
+aliases = {tenant_id}
+normalized = tenant_id.lower()
+if normalized.startswith('schule'):
+    aliases.add('school' + normalized[len('schule'):])
+elif normalized.startswith('school'):
+    aliases.add('schule' + normalized[len('school'):])
 for tid, conf in tenants.items():
-    if isinstance(conf, dict) and str(conf.get('port')) == port_str and tid != tenant_id:
+    if isinstance(conf, dict) and str(conf.get('port')) == port_str and tid not in aliases:
         print(f"Error: port {port_str} is already mapped to tenant {tid}", file=sys.stderr)
         sys.exit(2)
-existing = tenants.get(tenant_id)
+existing = {}
-if existing is None or not isinstance(existing, dict):
+for alias in aliases:
-    existing = {}
+    alias_cfg = tenants.get(alias)
+    if isinstance(alias_cfg, dict):
+        existing = alias_cfg
+        break
 existing['port'] = int(port_str)
-tenants[tenant_id] = existing
+for alias in aliases:
+    tenants[alias] = dict(existing)
 cfg['tenants'] = tenants
 with open(path, 'w', encoding='utf-8') as f:
     json.dump(cfg, f, indent=4, ensure_ascii=False)
@@ -212,13 +242,15 @@ EOF
 }
 
 restart_app_container() {
-    local env_file="$PWD/.docker-build.env"
+    local workdir="$SCRIPT_DIR"
+    local env_file="$SCRIPT_DIR/.docker-build.env"
     local compose_args=()
 
     ensure_runtime_config_json
     
     # If HOST_WORKDIR is set (called from container), use absolute paths so docker daemon resolves them correctly
-    if [ -n "$HOST_WORKDIR" ]; then
+    if [ -n "${HOST_WORKDIR:-}" ]; then
+        workdir="$HOST_WORKDIR"
         compose_args+=( -f "$(readlink -f "$HOST_WORKDIR/docker-compose-multitenant.yml")" )
         if [ -f "$HOST_WORKDIR/.docker-compose.runtime.override.yml" ]; then
             compose_args+=( -f "$(readlink -f "$HOST_WORKDIR/.docker-compose.runtime.override.yml")" )
@@ -228,9 +260,9 @@ restart_app_container() {
         fi
     else
         # Normal case: called directly from host
-        compose_args+=( -f "$PWD/docker-compose-multitenant.yml" )
+        compose_args+=( -f "$workdir/docker-compose-multitenant.yml" )
-        if [ -f "$PWD/.docker-compose.runtime.override.yml" ]; then
+        if [ -f "$workdir/.docker-compose.runtime.override.yml" ]; then
-            compose_args+=( -f "$PWD/.docker-compose.runtime.override.yml" )
+            compose_args+=( -f "$workdir/.docker-compose.runtime.override.yml" )
         fi
         if [ -f "$env_file" ]; then
             compose_args+=( --env-file "$env_file" )
@@ -238,7 +270,7 @@ restart_app_container() {
     fi
     
     # Pass along COMPOSE_PROJECT_NAME if set so the internal docker-compose sees it
-    if [ -n "$COMPOSE_PROJECT_NAME" ]; then
+    if [ -n "${COMPOSE_PROJECT_NAME:-}" ]; then
         compose_args=( -p "$COMPOSE_PROJECT_NAME" "${compose_args[@]}" )
     fi
 
@@ -259,9 +291,20 @@ if not os.path.isfile(path):
 with open(path, 'r', encoding='utf-8') as f:
     cfg = json.load(f)
 tenants = cfg.get('tenants', {})
-if not isinstance(tenants, dict) or tenant_id not in tenants or not isinstance(tenants[tenant_id], dict):
+if not isinstance(tenants, dict):
     sys.exit(2)
-removed = tenants.pop(tenant_id, None)
+aliases = {tenant_id}
+normalized = tenant_id.lower()
+if normalized.startswith('schule'):
+    aliases.add('school' + normalized[len('schule'):])
+elif normalized.startswith('school'):
+    aliases.add('schule' + normalized[len('school'):])
+removed = None
+for alias in list(aliases):
+    alias_cfg = tenants.get(alias)
+    if isinstance(alias_cfg, dict):
+        removed = alias_cfg if removed is None else removed
+        tenants.pop(alias, None)
 cfg['tenants'] = tenants
 with open(path, 'w', encoding='utf-8') as f:
     json.dump(cfg, f, indent=4, ensure_ascii=False)
@@ -373,7 +416,7 @@ case "$COMMAND" in
         APP_CONTAINER=$(docker ps -qf "name=app" | head -n 1)
         if [ -n "$APP_CONTAINER" ]; then
             docker exec $APP_CONTAINER python3 -c "
-import sys, re; sys.path.insert(0, '/app/Web'); import settings; from pymongo import MongoClient; import hashlib
+import sys, re; sys.path.insert(0, '/app'); sys.path.insert(0, '/app/Web'); from Web.modules.database import settings; from pymongo import MongoClient; import hashlib
 tenant_id = sys.argv[1].lower()
 sanitized = ''.join(c for c in tenant_id if c.isalnum() or c == '_')
 db_name = f'inventar_{sanitized}'
@@ -441,7 +484,7 @@ print(f'Tenant {sys.argv[1]} database initialized. Default admin: admin / admin1
             APP_CONTAINER=$(docker ps -qf "name=app" | head -n 1)
             if [ -n "$APP_CONTAINER" ]; then
                 docker exec $APP_CONTAINER python3 -c "
-import sys; sys.path.insert(0, '/app/Web'); from tenant import TenantContext; import settings; from pymongo import MongoClient
+import sys; sys.path.insert(0, '/app'); sys.path.insert(0, '/app/Web'); from tenant import TenantContext; from Web.modules.database import settings; from pymongo import MongoClient
 ctx = TenantContext()
 db_name = ctx._get_db_name(sys.argv[1])
 client = MongoClient(settings.MONGODB_HOST, int(settings.MONGODB_PORT))
@@ -488,7 +531,7 @@ print(f'Database for tenant {sys.argv[1]} dropped.')
         APP_CONTAINER=$(docker ps -qf "name=app" | head -n 1)
         if [ -n "$APP_CONTAINER" ]; then
             docker exec $APP_CONTAINER python3 -c "
-import sys; sys.path.insert(0, '/app/Web'); import settings; from pymongo import MongoClient
+import sys; sys.path.insert(0, '/app'); sys.path.insert(0, '/app/Web'); from Web.modules.database import settings; from pymongo import MongoClient
 client = MongoClient(settings.MONGODB_HOST, int(settings.MONGODB_PORT))
 db = client[f'{settings.MONGODB_DB}_{sys.argv[1]}']
 db.sessions.drop() # Force sign-out / session clear
@@ -535,8 +578,9 @@ PY
         if [ -n "$APP_CONTAINER" ]; then
              docker exec -i "$APP_CONTAINER" python3 - <<'PY'
 import sys
+sys.path.insert(0, '/app')
 sys.path.insert(0, '/app/Web')
-import settings
+from Web.modules.database import settings
 from pymongo import MongoClient
 client = MongoClient(settings.MONGODB_HOST, int(settings.MONGODB_PORT))
 prefix = 'inventar_'
@@ -575,11 +619,26 @@ with open(path, 'r', encoding='utf-8') as f:
     cfg = json.load(f)
 
 tenants = cfg.setdefault('tenants', {})
-tenant_cfg = tenants.setdefault(tenant_id, {})
+aliases = {tenant_id}
-if 'port' not in tenant_cfg:
+normalized = tenant_id.lower()
-    print(f"Warning: Tenant {tenant_id} doesn't have a port mapping in config.json.", file=sys.stderr)
+if normalized.startswith('schule'):
+    aliases.add('school' + normalized[len('schule'):])
+elif normalized.startswith('school'):
+    aliases.add('schule' + normalized[len('school'):])
+
+tenant_cfg = None
+for alias in aliases:
+    alias_cfg = tenants.get(alias)
+    if isinstance(alias_cfg, dict):
+        tenant_cfg = alias_cfg
+        break
+if tenant_cfg is None:
+    tenant_cfg = {}
 
 modules = tenant_cfg.setdefault('modules', {})
+port = tenant_cfg.get('port')
+if port is None:
+    print(f"Warning: Tenant {tenant_id} doesn't have a port mapping in config.json.", file=sys.stderr)
 
 for arg in module_args:
     if '=' not in arg:
@@ -591,6 +650,14 @@ for arg in module_args:
     module_cfg['enabled'] = state
     print(f"Module '{mod_name}' set to '{'on' if state else 'off'}' for tenant '{tenant_id}'.")
 
+for alias in aliases:
+    alias_cfg = tenants.get(alias)
+    if not isinstance(alias_cfg, dict):
+        alias_cfg = {}
+    alias_cfg.update(tenant_cfg)
+    alias_cfg['modules'] = modules
+    tenants[alias] = alias_cfg
+
 with open(path, 'w', encoding='utf-8') as f:
     json.dump(cfg, f, indent=4, ensure_ascii=False)
 PY