refactor: simplify PDF profile to use only titlepage-pdf format

- Remove redundant standard PDF format from profile
- Update Makefile to use 'quarto render --to titlepage-pdf --profile pdf'
- Streamline build process to single PDF format with cover page

kits/Makefile

@@ -16,10 +16,10 @@ build:
 	quarto render
 	@echo "✅ Build complete: _build/"
 
-# Build PDF
+# Build PDF with cover page
 pdf:
 	@echo "📄 Building Hardware Kits PDF..."
-	quarto render --profile pdf
+	quarto render --to titlepage-pdf --profile pdf
 	@echo "✅ PDF build complete: _build/pdf/"
 
 # Preview the site locally

kits/_quarto/profiles/pdf/_quarto.yml

@@ -1,9 +1,8 @@
 # =============================================================================
 # HARDWARE KITS PDF PROFILE
 # =============================================================================
-# This profile builds the Hardware Kits labs as a standalone PDF.
+# This profile builds the Hardware Kits labs as a standalone PDF with cover.
 # Usage: quarto render --profile pdf
-# Or:    quarto render --to titlepage-pdf --profile pdf
 # =============================================================================
 
 project:
@@ -69,35 +68,6 @@ book:
         - contents/shared/dsp_spectral_features_block/dsp_spectral_features_block.qmd
 
 format:
-  # Standard PDF format
-  pdf:
-    documentclass: scrbook
-    classoption:
-      - openany
-      - twoside
-    papersize: letter
-    fontsize: 10pt
-
-    # LaTeX includes
-    include-in-header: tex/header-includes.tex
-    include-before-body: tex/before-body-includes.tex
-    include-after-body: tex/after-body-includes.tex
-
-    # PDF engine
-    pdf-engine: lualatex
-
-    # Output settings
-    keep-tex: false
-    toc: true
-    toc-depth: 2
-    number-sections: true
-
-    # Code formatting
-    code-copy: false
-    code-overflow: wrap
-    highlight-style: github
-
-  # Titlepage PDF format (with custom cover page)
   titlepage-pdf:
     pdf-engine: lualatex
     use-rsvg-convert: true