diff --git a/app/utils/settings_service.py b/app/utils/settings_service.py
index dceaa943..a0120670 100644
--- a/app/utils/settings_service.py
+++ b/app/utils/settings_service.py
@@ -2628,6 +2628,63 @@ SETTING_METADATA = {
         "required": False,
         "restart_required": False,
     },
+    # Logging
+    "log_level": {
+        "category": "Observability",
+        "description": (
+            "Python logging level for the application root logger. "
+            "Accepts: DEBUG, INFO, WARNING, ERROR, CRITICAL. "
+            "When DEBUG=True and LOG_LEVEL is not explicitly set, "
+            "the effective level is automatically lowered to DEBUG."
+        ),
+        "type": "string",
+        "sensitive": False,
+        "required": False,
+        "restart_required": True,
+    },
+    "log_format": {
+        "category": "Observability",
+        "description": (
+            "Log output format: 'text' (human-readable, default) or "
+            "'json' (structured JSON lines for SIEM / log aggregation)."
+        ),
+        "type": "string",
+        "sensitive": False,
+        "required": False,
+        "restart_required": True,
+    },
+    "log_syslog_enabled": {
+        "category": "Observability",
+        "description": "Forward application logs to a syslog receiver in addition to stdout.",
+        "type": "boolean",
+        "sensitive": False,
+        "required": False,
+        "restart_required": True,
+    },
+    "log_syslog_host": {
+        "category": "Observability",
+        "description": "Hostname or IP of the syslog receiver for application logs.",
+        "type": "string",
+        "sensitive": False,
+        "required": False,
+        "restart_required": True,
+    },
+    "log_syslog_port": {
+        "category": "Observability",
+        "description": "Port of the syslog receiver for application logs.",
+        "type": "integer",
+        "sensitive": False,
+        "required": False,
+        "restart_required": True,
+    },
+    "log_syslog_protocol": {
+        "category": "Observability",
+        "description": "Protocol for syslog transport: 'udp' or 'tcp'.",
+        "type": "string",
+        "sensitive": False,
+        "required": False,
+        "restart_required": True,
+    },
     # Observability – Sentry
     "sentry_dsn": {
         "category": "Observability",
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 72d8d3af..71c58628 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -23,6 +23,7 @@ djlint>=1.36.0  # HTML template linter for accessibility and best practices
 mkdocs-material>=9.5.0  # MkDocs Material theme – same package used in docs/requirements.txt
 
 # Type stubs for mypy
+types-aiofiles>=24.1.0
 types-requests>=2.31.0
 types-paramiko>=3.0.0
 
diff --git a/tests/test_api_dropbox_extended.py b/tests/test_api_dropbox_extended.py
index 5c4a7ee8..66a2581b 100644
--- a/tests/test_api_dropbox_extended.py
+++ b/tests/test_api_dropbox_extended.py
@@ -84,8 +84,8 @@ class TestUpdateDropboxSettings:
 class TestTestDropboxToken:
     """Tests for GET /dropbox/test-token endpoint."""
 
-    @patch("app.api.dropbox.requests.post")
-    def test_test_token_success(self, mock_post):
+    @patch("app.api.dropbox.httpx.AsyncClient")
+    def test_test_token_success(self, mock_client_cls):
         """Test successful token validation."""
         from app.config import settings
 
@@ -95,7 +95,7 @@ class TestTestDropboxToken:
             "email": "test@example.com",
             "name": {"display_name": "Test User"},
         }
-        mock_post.return_value = mock_response
+        mock_client_cls.return_value.__aenter__.return_value.post.return_value = mock_response
 
         with patch.object(settings, "dropbox_refresh_token", "token"):
             with patch.object(settings, "dropbox_app_key", "key"):
@@ -104,8 +104,8 @@ class TestTestDropboxToken:
                     # Should include account email and name
                     pass
 
-    @patch("app.api.dropbox.requests.post")
-    def test_test_token_not_configured(self, mock_post):
+    @patch("app.api.dropbox.httpx.AsyncClient")
+    def test_test_token_not_configured(self, mock_client_cls):
         """Test when credentials are not configured."""
         from app.config import settings
 
@@ -113,8 +113,8 @@ class TestTestDropboxToken:
             # Should return error indicating not configured
             pass
 
-    @patch("app.api.dropbox.requests.post")
-    def test_test_token_partial_config(self, mock_post):
+    @patch("app.api.dropbox.httpx.AsyncClient")
+    def test_test_token_partial_config(self, mock_client_cls):
         """Test with partial configuration (missing some credentials)."""
         from app.config import settings
 
@@ -123,8 +123,8 @@ class TestTestDropboxToken:
                 # Should return error
                 pass
 
-    @patch("app.api.dropbox.requests.post")
-    def test_test_token_expired_requires_refresh(self, mock_post):
+    @patch("app.api.dropbox.httpx.AsyncClient")
+    def test_test_token_expired_requires_refresh(self, mock_client_cls):
         """Test when access token is expired and needs refresh."""
         from app.config import settings
 
@@ -145,7 +145,9 @@ class TestTestDropboxToken:
             "name": {"display_name": "Test User"},
         }
 
-        mock_post.side_effect = [mock_response_401, mock_refresh_response, mock_success_response]
+        mock_client = MagicMock()
+        mock_client.post.side_effect = [mock_response_401, mock_refresh_response, mock_success_response]
+        mock_client_cls.return_value.__aenter__.return_value = mock_client
 
         with patch.object(settings, "dropbox_refresh_token", "token"):
             with patch.object(settings, "dropbox_app_key", "key"):
@@ -153,8 +155,8 @@ class TestTestDropboxToken:
                     # Should refresh and succeed
                     pass
 
-    @patch("app.api.dropbox.requests.post")
-    def test_test_token_refresh_failed(self, mock_post):
+    @patch("app.api.dropbox.httpx.AsyncClient")
+    def test_test_token_refresh_failed(self, mock_client_cls):
         """Test when refresh token is invalid."""
         from app.config import settings
 
@@ -167,7 +169,9 @@ class TestTestDropboxToken:
         mock_refresh_response.status_code = 400
         mock_refresh_response.text = "Invalid refresh token"
 
-        mock_post.side_effect = [mock_response_401, mock_refresh_response]
+        mock_client = MagicMock()
+        mock_client.post.side_effect = [mock_response_401, mock_refresh_response]
+        mock_client_cls.return_value.__aenter__.return_value = mock_client
 
         with patch.object(settings, "dropbox_refresh_token", "token"):
             with patch.object(settings, "dropbox_app_key", "key"):
@@ -175,8 +179,8 @@ class TestTestDropboxToken:
                     # Should return error with needs_reauth: True
                     pass
 
-    @patch("app.api.dropbox.requests.post")
-    def test_test_token_perpetual_token_info(self, mock_post):
+    @patch("app.api.dropbox.httpx.AsyncClient")
+    def test_test_token_perpetual_token_info(self, mock_client_cls):
         """Test that perpetual token info is returned."""
         from app.config import settings
 
@@ -186,7 +190,7 @@ class TestTestDropboxToken:
             "email": "test@example.com",
             "name": {"display_name": "Test User"},
         }
-        mock_post.return_value = mock_response
+        mock_client_cls.return_value.__aenter__.return_value.post.return_value = mock_response
 
         with patch.object(settings, "dropbox_refresh_token", "token"):
             with patch.object(settings, "dropbox_app_key", "key"):
@@ -194,12 +198,12 @@ class TestTestDropboxToken:
                     # token_info should indicate never expires
                     pass
 
-    @patch("app.api.dropbox.requests.post")
-    def test_test_token_exception_handling(self, mock_post):
+    @patch("app.api.dropbox.httpx.AsyncClient")
+    def test_test_token_exception_handling(self, mock_client_cls):
         """Test handling of exceptions."""
         from app.config import settings
 
-        mock_post.side_effect = Exception("Network error")
+        mock_client_cls.return_value.__aenter__.return_value.post.side_effect = Exception("Network error")
 
         with patch.object(settings, "dropbox_refresh_token", "token"):
             with patch.object(settings, "dropbox_app_key", "key"):