CMS 2.0 - Theme engine, logging, admin improvements

Major changes:
- New ThemeManager with Twig templating and SCSS compilation
- Dynamic themes system (themes/default, themes/demo)
- LogManager with SQLite storage and syslog forwarding
- RequestLogger with static helper methods
- Admin UI overhaul (Bootstrap 5, dark mode)
- Admin config page with logging and theme settings
- Admin logs page with filters and search
- Removed legacy Mustache templates
- Removed test plugin and theme
- Composer dependencies: Twig, scssphp, CommonMark, MaxMind GeoIP

themes/gen-preview.sh

@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+# Generate theme.png preview images for each theme using ImageMagick.
+# Reads the theme's SCSS color variables and renders a simple page mockup.
+set -euo pipefail
+
+cd "$(dirname "$0")/../themes"
+
+gen_preview() {
+    local dir="$1"
+    local scss="$dir/css/theme.scss"
+    if [[ ! -f "$scss" ]]; then
+        echo "Skip $dir (no theme.scss)"
+        return
+    fi
+
+    local header_bg header_font nav_bg nav_font sidebar_bg sidebar_border
+    header_bg=$(grep -oE '^\$header-bg:\s*[^;]+;' "$scss" | grep -oE '#[0-9a-fA-F]{6}' || echo "#0a369d")
+    header_font=$(grep -oE '^\$header-font:\s*[^;]+;' "$scss" | grep -oE '#[0-9a-fA-F]{6}' || echo "#ffffff")
+    nav_bg=$(grep -oE '^\$nav-bg:\s*[^;]+;' "$scss" | grep -oE '#[0-9a-fA-F]{6}' || echo "#2754b4")
+    nav_font=$(grep -oE '^\$nav-font:\s*[^;]+;' "$scss" | grep -oE '#[0-9a-fA-F]{6}' || echo "#ffffff")
+    sidebar_bg=$(grep -oE '^\$sidebar-bg:\s*[^;]+;' "$scss" | grep -oE '#[0-9a-fA-F]{6}' || echo "#f8f9fa")
+    sidebar_border=$(grep -oE '^\$sidebar-border:\s*[^;]+;' "$scss" | grep -oE '#[0-9a-fA-F]{6}' || echo "#dee2e6")
+
+    local size=640x400
+    local body_bg="#ffffff"
+
+    # Header bar
+    convert -size "$size" xc:"$body_bg" \
+        -fill "$header_bg" -draw "rectangle 0,0 639,70" \
+        -fill "$nav_bg"    -draw "rectangle 0,70 639,95" \
+        -fill "$sidebar_bg" -draw "rectangle 0,95 180,399" \
+        -fill "$header_font" -font DejaVu-Sans-Bold -pointsize 20 -annotate +15+22 "$(basename "$dir")" \
+        -fill "$header_font" -font DejaVu-Sans -pointsize 13 -annotate +15+45 "CodePress" \
+        -fill "$nav_font" -font DejaVu-Sans -pointsize 12 -annotate +15+85 "Home   |   Over   |   Blog" \
+        -fill "#666666" -font DejaVu-Sans -pointsize 14 -annotate +200+130 "Welkom bij $(basename "$dir")" \
+        -fill "#999999" -font DejaVu-Sans -pointsize 11 -annotate +200+155 "Dit is een voorbeeld van het thema." \
+        -fill "#cccccc" -draw "rectangle 200,400 639,399" \
+        "$dir/theme.png"
+
+    echo "Generated $dir/theme.png"
+}
+
+for d in default demo test; do
+    if [[ -d "$d" ]]; then
+        gen_preview "$d"
+    fi
+done