feat: add report export capabilities with Pandoc and WeasyPrint support

- Updated Dockerfiles to include Pandoc and WeasyPrint runtime libraries for report generation.
- Enhanced report retrieval functionality to include version siblings in the response.
- Modified report export process to utilize WeasyPrint for PDF generation, improving output quality.

Dockerfile.allinone

@@ -121,6 +121,13 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libgbm1 \
     libcairo2 \
     libpango-1.0-0 \
+    # ============================
+    # Report export (Pandoc + WeasyPrint runtime libs)
+    # ============================
+    pandoc \
+    libpangoft2-1.0-0 \
+    libharfbuzz0b \
+    libharfbuzz-subset0 \
     && rm -rf /var/lib/apt/lists/*
 
 # Install Node.js 20.x (for running frontend)

surfsense_backend/Dockerfile

@@ -20,6 +20,10 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libxrender1 \
     dos2unix \
     git \
+    pandoc \
+    libpango-1.0-0 \
+    libpangoft2-1.0-0 \
+    libharfbuzz-subset0 \
     && rm -rf /var/lib/apt/lists/*
 
 # Update certificates and install SSL tools

surfsense_backend/app/routes/reports_routes.py

@@ -180,7 +180,7 @@ async def export_report(
         # thread executor to avoid blocking the async event loop.
         extra_args = ["--standalone"]
         if format == ExportFormat.PDF:
-            extra_args.append("--pdf-engine=wkhtmltopdf")
+            extra_args.append("--pdf-engine=weasyprint")
 
         loop = asyncio.get_running_loop()
         output = await loop.run_in_executor(

surfsense_backend/pyproject.toml

@@ -64,6 +64,7 @@ dependencies = [
     "langchain-unstructured>=1.0.1",
     "slowapi>=0.1.9",
     "pypandoc>=1.16.2",
+    "weasyprint>=68.1",
 ]
 
 [dependency-groups]