feat: add SVG conversion functionality for raster images and update requirements

backend/app/routes/image.py

@@ -12,12 +12,13 @@ from app.services.policy_service import (
 )
 from app.utils.file_validator import FileValidationError
 from app.utils.sanitizer import generate_safe_path
-from app.tasks.image_tasks import convert_image_task, resize_image_task
+from app.tasks.image_tasks import convert_image_task, resize_image_task, convert_image_to_svg_task
 
 image_bp = Blueprint("image", __name__)
 
 ALLOWED_IMAGE_TYPES = ["png", "jpg", "jpeg", "webp"]
 ALLOWED_OUTPUT_FORMATS = ["jpg", "png", "webp"]
+ALLOWED_SVG_COLOR_MODES = ["color", "binary"]
 
 
 @image_bp.route("/convert", methods=["POST"])
@@ -155,3 +156,54 @@ def resize_image_route():
         "task_id": task.id,
         "message": "Image resize started. Poll /api/tasks/{task_id}/status for progress.",
     }), 202
+
+
+@image_bp.route("/to-svg", methods=["POST"])
+@limiter.limit("10/minute")
+def convert_image_to_svg_route():
+    """
+    Convert a raster image to SVG vector format.
+
+    Accepts: multipart/form-data with:
+        - 'file': Image file (PNG, JPG, JPEG, WebP)
+        - 'color_mode' (optional): "color" or "binary" (default: "color")
+    Returns: JSON with task_id for polling
+    """
+    if "file" not in request.files:
+        return jsonify({"error": "No file provided."}), 400
+
+    file = request.files["file"]
+    color_mode = request.form.get("color_mode", "color").lower()
+
+    if color_mode not in ALLOWED_SVG_COLOR_MODES:
+        color_mode = "color"
+
+    actor = resolve_web_actor()
+    try:
+        assert_quota_available(actor)
+    except PolicyError as e:
+        return jsonify({"error": e.message}), e.status_code
+
+    try:
+        original_filename, ext = validate_actor_file(
+            file, allowed_types=ALLOWED_IMAGE_TYPES, actor=actor
+        )
+    except FileValidationError as e:
+        return jsonify({"error": e.message}), e.code
+
+    task_id, input_path = generate_safe_path(ext, folder_type="upload")
+    file.save(input_path)
+
+    task = convert_image_to_svg_task.delay(
+        input_path,
+        task_id,
+        original_filename,
+        color_mode,
+        **build_task_tracking_kwargs(actor),
+    )
+    record_accepted_usage(actor, "image-to-svg", task.id)
+
+    return jsonify({
+        "task_id": task.id,
+        "message": "Image to SVG conversion started. Poll /api/tasks/{task_id}/status for progress.",
+    }), 202