settings: Update for Django 5.1 compatibility

* Add LocaleMiddleware and i18n template context processor
* Add ATOMIC_REQUESTS for database transactions
* Adjust password validation settings:
  - Keep min length at 6 chars
* Add security settings for production environment

ivatar/settings.py

@@ -42,6 +42,7 @@ MIDDLEWARE = [
     "django.contrib.auth.middleware.AuthenticationMiddleware",
     "django.contrib.messages.middleware.MessageMiddleware",
     "django.middleware.clickjacking.XFrameOptionsMiddleware",
+    "django.middleware.locale.LocaleMiddleware",
 ]
 
 ROOT_URLCONF = "ivatar.urls"
@@ -49,7 +50,7 @@ ROOT_URLCONF = "ivatar.urls"
 TEMPLATES = [
     {
         "BACKEND": "django.template.backends.django.DjangoTemplates",
-        "DIRS": [],
+        "DIRS": [os.path.join(BASE_DIR, "templates")],
         "APP_DIRS": True,
         "OPTIONS": {
             "context_processors": [
@@ -57,7 +58,9 @@ TEMPLATES = [
                 "django.template.context_processors.request",
                 "django.contrib.auth.context_processors.auth",
                 "django.contrib.messages.context_processors.messages",
+                "django.template.context_processors.i18n",
             ],
+            "debug": DEBUG,
         },
     },
 ]
@@ -72,6 +75,7 @@ DATABASES = {
     "default": {
         "ENGINE": "django.db.backends.sqlite3",
         "NAME": os.path.join(BASE_DIR, "db.sqlite3"),
+        "ATOMIC_REQUESTS": True,
     }
 }
 
@@ -85,6 +89,9 @@ AUTH_PASSWORD_VALIDATORS = [
     },
     {
         "NAME": "django.contrib.auth.password_validation.MinimumLengthValidator",  # noqa
+        "OPTIONS": {
+            "min_length": 6,
+        },
     },
     {
         "NAME": "django.contrib.auth.password_validation.CommonPasswordValidator",  # noqa
@@ -94,6 +101,25 @@ AUTH_PASSWORD_VALIDATORS = [
     },
 ]
 
+# Password Hashing (more secure)
+PASSWORD_HASHERS = [
+    "django.contrib.auth.hashers.Argon2PasswordHasher",
+    "django.contrib.auth.hashers.PBKDF2PasswordHasher",
+    "django.contrib.auth.hashers.PBKDF2SHA1PasswordHasher",
+]
+
+# Security Settings
+SECURE_BROWSER_XSS_FILTER = True
+SECURE_CONTENT_TYPE_NOSNIFF = True
+X_FRAME_OPTIONS = "DENY"
+CSRF_COOKIE_SECURE = not DEBUG
+SESSION_COOKIE_SECURE = not DEBUG
+
+if not DEBUG:
+    SECURE_SSL_REDIRECT = True
+    SECURE_HSTS_SECONDS = 31536000  # 1 year
+    SECURE_HSTS_INCLUDE_SUBDOMAINS = True
+    SECURE_HSTS_PRELOAD = True
 
 # Internationalization
 # https://docs.djangoproject.com/en/2.0/topics/i18n/
@@ -116,4 +142,4 @@ STATIC_ROOT = os.path.join(BASE_DIR, "static")
 
 DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"
 
-from config import *  # pylint: disable=wildcard-import,wrong-import-position,unused-wildcard-import
+from config import *  # pylint: disable=wildcard-import,wrong-import-position,unused-wildcard-import  # noqa