update code of dash and report of cont_client and devlp abstract of qty

app/constants/http_status.py

@@ -1,11 +1,29 @@
 class HTTPStatus:
-    OK = 200
-    CREATED = 201
-    BAD_REQUEST = 400
-    UNAUTHORIZED = 401
-    FORBIDDEN = 403
-    NOT_FOUND = 404
-    METHOD_NOT_ALLOWED = 405
-    CONFLICT = 409
-    UNPROCESSABLE_ENTITY = 422
-    INTERNAL_SERVER_ERROR = 500
+    # ==========================
+    # 2xx Success
+    # ==========================
+    OK = 200                      # Request successful
+    CREATED = 201                 # Resource created successfully
+    ACCEPTED = 202                # Request accepted for processing
+    NO_CONTENT = 204              # Success, no response body
+
+    # ==========================
+    # 4xx Client Errors
+    # ==========================
+    BAD_REQUEST = 400             # Invalid request
+    UNAUTHORIZED = 401            # Authentication required
+    FORBIDDEN = 403               # Access denied
+    NOT_FOUND = 404               # Resource not found
+    METHOD_NOT_ALLOWED = 405      # HTTP method not allowed
+    CONFLICT = 409                # Resource conflict (e.g., duplicate)
+    UNPROCESSABLE_ENTITY = 422    # Validation error
+    TOO_MANY_REQUESTS = 429       # Rate limit exceeded
+
+    # ==========================
+    # 5xx Server Errors
+    # ==========================
+    INTERNAL_SERVER_ERROR = 500   # Internal server error
+    NOT_IMPLEMENTED = 501         # Feature not implemented
+    BAD_GATEWAY = 502             # Invalid response from upstream server
+    SERVICE_UNAVAILABLE = 503     # Server temporarily unavailable
+    GATEWAY_TIMEOUT = 504         # Upstream server timeout

app/constants/messages.py

@@ -1,17 +1,65 @@
 class SuccessMessage:
-    FETCHED = "Data fetched successfully"
-    CREATED = "Resource created successfully"
-    UPDATED = "Resource updated successfully"
-    DELETED = "Resource deleted successfully"
-    LOGIN = "Login successful"
-    LOGOUT = "Logout successful"
+    FETCHED = "Data fetched successfully."
+    CREATED = "Resource created successfully."
+    UPDATED = "Resource updated successfully."
+    DELETED = "Resource deleted successfully."
+
+    SAVED = "Data saved successfully."
+    IMPORTED = "Data imported successfully."
+    EXPORTED = "Data exported successfully."
+    UPLOADED = "File uploaded successfully."
+    DOWNLOADED = "File downloaded successfully."
+
+    LOGIN = "Login successful."
+    LOGOUT = "Logout successful."
+    PASSWORD_CHANGED = "Password changed successfully."
+    PASSWORD_RESET = "Password reset successfully."
+
+    EMAIL_SENT = "Email sent successfully."
+    STATUS_UPDATED = "Status updated successfully."
 
 
 class ErrorMessage:
-    INVALID_REQUEST = "Invalid request data"
-    UNAUTHORIZED = "Unauthorized access"
-    FORBIDDEN = "Access forbidden"
-    NOT_FOUND = "Resource not found"
-    VALIDATION_FAILED = "Validation failed"
-    INTERNAL_ERROR = "Internal server error"
-    DUPLICATE_ENTRY = "Duplicate record found"
+    INVALID_REQUEST = "Invalid request."
+    INVALID_DATA = "Invalid data provided."
+    VALIDATION_FAILED = "Validation failed."
+
+    UNAUTHORIZED = "Unauthorized access."
+    FORBIDDEN = "Access denied."
+    NOT_FOUND = "Resource not found."
+    METHOD_NOT_ALLOWED = "Method not allowed."
+
+    DUPLICATE_ENTRY = "Duplicate record found."
+    RECORD_EXISTS = "Record already exists."
+    RECORD_NOT_FOUND = "Record does not exist."
+
+    FILE_NOT_FOUND = "File not found."
+    FILE_UPLOAD_FAILED = "File upload failed."
+    FILE_IMPORT_FAILED = "File import failed."
+
+    DATABASE_ERROR = "Database operation failed."
+    INTERNAL_SERVER_ERROR = "Internal server error."
+    SERVICE_UNAVAILABLE = "Service temporarily unavailable."
+
+    LOGIN_FAILED = "Invalid username or password."
+    SESSION_EXPIRED = "Session expired. Please login again."
+
+    PASSWORD_MISMATCH = "Passwords do not match."
+    INVALID_TOKEN = "Invalid or expired token."
+
+
+class WarningMessage:
+    NO_DATA_FOUND = "No data found."
+    ALREADY_EXISTS = "Record already exists."
+    UNSAVED_CHANGES = "You have unsaved changes."
+    DELETE_CONFIRMATION = "Are you sure you want to delete the selected record(s)?"
+    INVALID_FILTER = "No records match the selected filters."
+
+
+class InfoMessage:
+    PROCESSING = "Request is being processed."
+    LOADING = "Loading data..."
+    SAVING = "Saving data..."
+    DELETING = "Deleting record..."
+    IMPORTING = "Importing data..."
+    EXPORTING = "Preparing export..."