fix: use POST method for Outline signed URL upload

Change HTTP method from PUT to POST on line 77 for signed URL upload,
as Outline's S3 bucket only accepts POST requests.

skills/doc-translator/scripts/upload_image_to_outline.sh

@@ -0,0 +1,90 @@
+#!/usr/bin/env bash
+# Upload an image to an Outline document via signed URL
+#
+# Usage:
+#   upload_image_to_outline.sh <image_path> <document_id>
+#
+# Environment:
+#   OUTLINE_API_KEY - Bearer token for wiki.az-gruppe.com API
+#
+# Output (JSON):
+#   {"success": true, "attachment_url": "https://...", "document_id": "..."}
+#   OR
+#   {"success": false, "error": "error message"}
+
+set -euo pipefail
+
+if [ $# -ne 2 ]; then
+    echo '{"success": false, "error": "Usage: upload_image_to_outline.sh <image_path> <document_id>"}' >&2
+    exit 1
+fi
+
+IMAGE_PATH="$1"
+DOCUMENT_ID="$2"
+
+# Check if file exists
+if [ ! -f "$IMAGE_PATH" ]; then
+    echo "{\"success\": false, \"error\": \"Image file not found: $IMAGE_PATH\"}" >&2
+    exit 1
+fi
+
+# Extract image name and extension
+IMAGE_NAME="$(basename "$IMAGE_PATH")"
+EXTENSION="${IMAGE_NAME##*.}"
+IMAGE_NAME_BASE="${IMAGE_NAME%.*}"
+
+# Detect content type by extension
+case "$EXTENSION" in
+    png)   CONTENT_TYPE="image/png" ;;
+    jpg|jpeg) CONTENT_TYPE="image/jpeg" ;;
+    gif)   CONTENT_TYPE="image/gif" ;;
+    svg)   CONTENT_TYPE="image/svg+xml" ;;
+    webp)  CONTENT_TYPE="image/webp" ;;
+    *)     CONTENT_TYPE="application/octet-stream" ;;
+esac
+
+# Get file size (cross-platform: macOS uses stat -f%z, Linux uses stat -c%s)
+FILESIZE=$(stat -f%z "$IMAGE_PATH" 2>/dev/null || stat -c%s "$IMAGE_PATH" 2>/dev/null)
+
+if [ -z "$FILESIZE" ]; then
+    echo "{\"success\": false, \"error\": \"Failed to get file size for: $IMAGE_PATH\"}" >&2
+    exit 1
+fi
+
+# Create attachment record
+RESPONSE=$(curl -s -X POST "https://wiki.az-gruppe.com/api/attachments.create" \
+    -H "Authorization: Bearer $OUTLINE_API_KEY" \
+    -H "Content-Type: application/json" \
+    -d "{
+        \"name\": \"$IMAGE_NAME\",
+        \"contentType\": \"$CONTENT_TYPE\",
+        \"size\": $FILESIZE,
+        \"documentId\": \"$DOCUMENT_ID\"
+    }")
+
+# Extract URLs from response
+UPLOAD_URL=$(echo "$RESPONSE" | jq -r '.data.uploadUrl // empty')
+ATTACHMENT_URL=$(echo "$RESPONSE" | jq -r '.data.attachment.url // empty')
+
+# Check for errors
+if [ -z "$UPLOAD_URL" ] || [ "$UPLOAD_URL" = "null" ]; then
+    ERROR_MSG=$(echo "$RESPONSE" | jq -r '.message // "Failed to create attachment"')
+    echo "{\"success\": false, \"error\": \"$ERROR_MSG\", \"response\": \"$RESPONSE\"}" >&2
+    exit 1
+fi
+
+# Upload binary to signed URL
+UPLOAD_RESPONSE=$(curl -s -w "%{http_code}" -X POST "$UPLOAD_URL" \
+    -H "Content-Type: $CONTENT_TYPE" \
+    --data-binary "@$IMAGE_PATH")
+
+# Extract HTTP status code (last 3 characters)
+HTTP_CODE="${UPLOAD_RESPONSE: -3}"
+
+if [ "$HTTP_CODE" != "200" ] && [ "$HTTP_CODE" != "201" ]; then
+    echo "{\"success\": false, \"error\": \"Upload failed with HTTP $HTTP_CODE\", \"upload_url\": \"$UPLOAD_URL\"}" >&2
+    exit 1
+fi
+
+# Output success result
+echo "{\"success\": true, \"attachment_url\": \"$ATTACHMENT_URL\", \"document_id\": \"$DOCUMENT_ID\"}"