docs: add English quick reference to help

app.py

@@ -39,6 +39,7 @@ DOCS_DIR = os.path.join(app.root_path, "docs")
 DEFAULT_DOC_LANGUAGE = "de"
 USER_MANUAL_FILENAME = "user_manual.md"
 RECENT_CHANGES_FILENAME = "recent_changes.md"
+QUICK_REFERENCE_FILENAME = "quick_reference.md"
 WHATS_NEW_SUMMARY_FILE = os.path.join(app.root_path, "static", "recent_changes.json")
 UNKNOWN_BUILD_INFO = {
     "version": "unknown",
@@ -305,6 +306,11 @@ def render_recent_changes(language=DEFAULT_DOC_LANGUAGE):
     """Read and render the Markdown recent changes document."""
     return render_markdown_document(RECENT_CHANGES_FILENAME, language)
 
+
+def render_quick_reference(language="en"):
+    """Read and render the Markdown quick reference document."""
+    return render_markdown_document(QUICK_REFERENCE_FILENAME, language)
+
 @app.route("/", methods=["GET"])
 @auth.login_required
 def index():
@@ -330,6 +336,12 @@ def user_manual():
             "user_manual.html",
             document_title="User Manual",
             document_subtitle="RollCalc technical user documentation",
+            document_actions=[
+                {
+                    "href": url_for("quick_reference"),
+                    "label": "Open English Quick Reference",
+                }
+            ],
             error_title="User Manual unavailable",
             manual_html=manual_html,
             toc=toc,
@@ -341,6 +353,12 @@ def user_manual():
             "user_manual.html",
             document_title="User Manual",
             document_subtitle="RollCalc technical user documentation",
+            document_actions=[
+                {
+                    "href": url_for("quick_reference"),
+                    "label": "Open English Quick Reference",
+                }
+            ],
             error_title="User Manual unavailable",
             manual_html=None,
             toc=[],
@@ -351,6 +369,40 @@ def user_manual():
         ), 500
 
 
+@app.route("/help/quick-reference", methods=["GET"])
+@auth.login_required
+def quick_reference():
+    """Render the English Quick Reference inside the RollCalc Help layout."""
+    log_access(auth.current_user(), "/help/quick-reference", "GET")
+    try:
+        quick_html, toc = render_quick_reference("en")
+        return render_template(
+            "user_manual.html",
+            document_title="Quick Reference",
+            document_subtitle="Concise English reference for common RollCalc workflows",
+            document_actions=[],
+            error_title="Quick Reference unavailable",
+            manual_html=quick_html,
+            toc=toc,
+            render_error=None
+        )
+    except Exception:
+        app.logger.exception("Could not render quick reference")
+        return render_template(
+            "user_manual.html",
+            document_title="Quick Reference",
+            document_subtitle="Concise English reference for common RollCalc workflows",
+            document_actions=[],
+            error_title="Quick Reference unavailable",
+            manual_html=None,
+            toc=[],
+            render_error=(
+                "The quick reference could not be loaded. "
+                "Please contact the RollCalc maintainer if the problem persists."
+            )
+        ), 500
+
+
 @app.route("/help/recent-changes", methods=["GET"])
 @auth.login_required
 def recent_changes():
@@ -362,6 +414,7 @@ def recent_changes():
             "user_manual.html",
             document_title="Recent Changes",
             document_subtitle="RollCalc release notes",
+            document_actions=[],
             error_title="Recent Changes unavailable",
             manual_html=changes_html,
             toc=toc,
@@ -373,6 +426,7 @@ def recent_changes():
             "user_manual.html",
             document_title="Recent Changes",
             document_subtitle="RollCalc release notes",
+            document_actions=[],
             error_title="Recent Changes unavailable",
             manual_html=None,
             toc=[],