feat: Add mobile compatibility utilities and enhance UI templates

- Introduced mobile compatibility utilities in mobile_compatibility.js for better handling of file uploads and image previews on mobile devices.
- Created base.html as a foundational template with responsive design and mobile compatibility features.
- Developed login.html for user authentication with a password toggle feature.
- Added main.html for displaying license keys and HWIDs with options to generate new keys and upload backups.
- Implemented a test script (test.sh) for validating license information via API.
- Created verify.py for license key validation and management, including functions for loading, checking, and registering keys.
- Added version.txt to track the current version of the application.

Inventarsystem-Lizenz-Verwaltung/verify.py

@@ -0,0 +1,61 @@
+import json
+import os
+import secrets
+
+LICENSES_FILE = os.path.abspath(os.path.join(os.path.dirname(__file__), "licenses.json"))
+
+
+def load_file() -> dict:
+    with open(LICENSES_FILE, "r") as f:
+        data = json.load(f)
+        return data
+
+def check(license_key, hwid_uuid) -> bool:
+    data = load_file()
+    for i in data:
+        if str(i["license_key"]) == str(license_key):
+            if str(i["hwid_uuid"]) == str(hwid_uuid):
+                return True
+            elif str(i["hwid_uuid"]) == "":
+                i["hwid_uuid"] = str(hwid_uuid)
+                register_new_Key(data)
+                return True
+    return False
+
+def register_new_Key(data_stream):
+    with open(LICENSES_FILE, "w") as f:
+        json.dump(data_stream, f, indent=2)
+
+def new_key() -> str:
+    data = load_file()
+    existing_ids = []
+    for item in data:
+        user_id = str(item.get("user_id", "")).strip()
+        if user_id.isdigit():
+            existing_ids.append(int(user_id))
+
+    next_id = (max(existing_ids) + 1) if existing_ids else 1
+    generated_key = key_generator()
+    data.append(
+        {
+            "user_id": f"{next_id:04d}",
+            "license_key": generated_key,
+            "hwid_uuid": "",
+        }
+    )
+    register_new_Key(data)
+    return generated_key
+
+
+def remove_key(user_id: str) -> bool:
+    data = load_file()
+    filtered = [item for item in data if str(item.get("user_id", "")) != str(user_id)]
+
+    if len(filtered) == len(data):
+        return False
+
+    register_new_Key(filtered)
+    return True
+
+def key_generator():
+    return secrets.token_urlsafe(32)