Add xlsxwriter-based Excel generation scripts with openpyxl implementation

- Created create_excel_xlsxwriter.py and update_excel_xlsxwriter.py
- Uses openpyxl exclusively to preserve Excel formatting and formulas
- Updated server.js to use new xlsxwriter scripts for form submissions
- Maintains all original functionality while ensuring proper Excel file handling

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

venv/lib/python3.12/site-packages/et_xmlfile/xmlfile.py

@@ -0,0 +1,158 @@
+from __future__ import absolute_import
+# Copyright (c) 2010-2015 openpyxl
+
+"""Implements the lxml.etree.xmlfile API using the standard library xml.etree"""
+
+
+from contextlib import contextmanager
+
+from xml.etree.ElementTree import (
+    Element,
+    _escape_cdata,
+)
+
+from . import incremental_tree
+
+
+class LxmlSyntaxError(Exception):
+    pass
+
+
+class _IncrementalFileWriter(object):
+    """Replacement for _IncrementalFileWriter of lxml"""
+    def __init__(self, output_file):
+        self._element_stack = []
+        self._file = output_file
+        self._have_root = False
+        self.global_nsmap = incremental_tree.current_global_nsmap()
+        self.is_html = False
+
+    @contextmanager
+    def element(self, tag, attrib=None, nsmap=None, **_extra):
+        """Create a new xml element using a context manager."""
+        if nsmap and None in nsmap:
+            # Normalise None prefix (lxml's default namespace prefix) -> "", as
+            # required for incremental_tree
+            if "" in nsmap and nsmap[""] != nsmap[None]:
+                raise ValueError(
+                    'Found None and "" as default nsmap prefixes with different URIs'
+                )
+            nsmap = nsmap.copy()
+            nsmap[""] = nsmap.pop(None)
+
+        # __enter__ part
+        self._have_root = True
+        if attrib is None:
+            attrib = {}
+        elem = Element(tag, attrib=attrib, **_extra)
+        elem.text = ''
+        elem.tail = ''
+        if self._element_stack:
+            is_root = False
+            (
+                nsmap_scope,
+                default_ns_attr_prefix,
+                uri_to_prefix,
+            ) = self._element_stack[-1]
+        else:
+            is_root = True
+            nsmap_scope = {}
+            default_ns_attr_prefix = None
+            uri_to_prefix = {}
+        (
+            tag,
+            nsmap_scope,
+            default_ns_attr_prefix,
+            uri_to_prefix,
+            next_remains_root,
+        ) = incremental_tree.write_elem_start(
+            self._file,
+            elem,
+            nsmap_scope=nsmap_scope,
+            global_nsmap=self.global_nsmap,
+            short_empty_elements=False,
+            is_html=self.is_html,
+            is_root=is_root,
+            uri_to_prefix=uri_to_prefix,
+            default_ns_attr_prefix=default_ns_attr_prefix,
+            new_nsmap=nsmap,
+        )
+        self._element_stack.append(
+            (
+                nsmap_scope,
+                default_ns_attr_prefix,
+                uri_to_prefix,
+            )
+        )
+        yield
+
+        # __exit__ part
+        self._element_stack.pop()
+        self._file(f"</{tag}>")
+        if elem.tail:
+            self._file(_escape_cdata(elem.tail))
+
+    def write(self, arg):
+        """Write a string or subelement."""
+
+        if isinstance(arg, str):
+            # it is not allowed to write a string outside of an element
+            if not self._element_stack:
+                raise LxmlSyntaxError()
+            self._file(_escape_cdata(arg))
+
+        else:
+            if not self._element_stack and self._have_root:
+                raise LxmlSyntaxError()
+
+            if self._element_stack:
+                is_root = False
+                (
+                    nsmap_scope,
+                    default_ns_attr_prefix,
+                    uri_to_prefix,
+                ) = self._element_stack[-1]
+            else:
+                is_root = True
+                nsmap_scope = {}
+                default_ns_attr_prefix = None
+                uri_to_prefix = {}
+            incremental_tree._serialize_ns_xml(
+                self._file,
+                arg,
+                nsmap_scope=nsmap_scope,
+                global_nsmap=self.global_nsmap,
+                short_empty_elements=True,
+                is_html=self.is_html,
+                is_root=is_root,
+                uri_to_prefix=uri_to_prefix,
+                default_ns_attr_prefix=default_ns_attr_prefix,
+            )
+
+    def __enter__(self):
+        pass
+
+    def __exit__(self, type, value, traceback):
+        # without root the xml document is incomplete
+        if not self._have_root:
+            raise LxmlSyntaxError()
+
+
+class xmlfile(object):
+    """Context manager that can replace lxml.etree.xmlfile."""
+    def __init__(self, output_file, buffered=False, encoding="utf-8", close=False):
+        self._file = output_file
+        self._close = close
+        self.encoding = encoding
+        self.writer_cm = None
+
+    def __enter__(self):
+        self.writer_cm = incremental_tree._get_writer(self._file, encoding=self.encoding)
+        writer, declared_encoding = self.writer_cm.__enter__()
+        return _IncrementalFileWriter(writer)
+
+    def __exit__(self, type, value, traceback):
+        if self.writer_cm:
+            self.writer_cm.__exit__(type, value, traceback)
+        if self._close:
+            self._file.close()