Initial commit: Astro 6 static blog site

- German (default) and English i18n support
- Categories and tags
- Blog posts with hero images
- Dark/light theme switcher
- View Transitions removed to fix reload ghost images
- Webmentions integration
- RSS feeds per locale

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

scripts/new-post.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+# Usage: new-post.sh "Post Title"
+# Creates a new blog post in the Obsidian vault with correct frontmatter and folder structure.
+set -euo pipefail
+
+VAULT='/Users/adrian/Obsidian/Web/adrian-altner-com'
+
+if [[ -z "${1:-}" ]]; then
+  echo "Usage: new-post.sh \"Post Title\"" >&2
+  exit 1
+fi
+
+TITLE="$1"
+SLUG=$(echo "$TITLE" | tr '[:upper:]' '[:lower:]' | sed 's/[^a-z0-9 -]//g' | sed 's/ \+/-/g' | sed 's/^-\+//;s/-\+$//')
+DATE_FOLDER=$(date +%Y/%m/%d)
+PUBLISH_DATE=$(date +%Y-%m-%dT%H:%M:%S%z)
+DIR="$VAULT/content/blog/posts/$DATE_FOLDER"
+FILE="$DIR/$SLUG.md"
+
+mkdir -p "$DIR"
+
+if [[ -f "$FILE" ]]; then
+  echo "File already exists: $FILE" >&2
+  exit 1
+fi
+
+cat > "$FILE" << EOF
+---
+title: "$TITLE"
+description: ""
+publishDate: $PUBLISH_DATE
+tags:
+  -
+draft: true
+syndication:
+---
+EOF
+
+echo "Created: $FILE"