feat: enhance drag-and-drop functionality to support multiple file paths and URLs

src/webdrop_bridge/ui/main_window.py

@@ -7,7 +7,7 @@ import re
 import sys
 from datetime import datetime
 from pathlib import Path
-from typing import Optional
+from typing import Optional, Union
 
 from PySide6.QtCore import (
     QEvent,
@@ -312,21 +312,34 @@ class _DragBridge(QObject):
         self.window = window
 
     @Slot(str)
-    def start_file_drag(self, path_text: str) -> None:
-        """Start a native file drag for the given path or Azure URL.
+    def start_file_drag(self, paths_text: str) -> None:
+        """Start a native file drag for the given path(s) or Azure URL(s).
+
+        Called from JavaScript when user drags item(s).
+        Accepts either:
+        - Single file path string or Azure URL
+        - JSON array string of file paths or Azure URLs (multiple drag support)
 
-        Called from JavaScript when user drags an item.
-        Accepts either local file paths or Azure Blob Storage URLs.
         Defers execution to avoid Qt drag manager state issues.
 
         Args:
-            path_text: File path string or Azure URL to drag
+            paths_text: String (single path/URL) or JSON array string (multiple paths/URLs)
         """
-        logger.debug(f"Bridge: start_file_drag called for {path_text}")
+        logger.debug(f"Bridge: start_file_drag called with {len(paths_text)} chars")
 
-        # Defer to avoid drag manager state issues
-        # handle_drag() handles URL conversion and validation internally
-        QTimer.singleShot(0, lambda: self.window.drag_interceptor.handle_drag(path_text))
+        # Try to parse as JSON array first (for multiple-drag support)
+        paths_list: Union[str, list] = paths_text
+        if paths_text.startswith("["):
+            try:
+                parsed = json.loads(paths_text)
+                if isinstance(parsed, list):
+                    paths_list = parsed
+                    logger.debug(f"Parsed JSON array with {len(parsed)} item(s)")
+            except (json.JSONDecodeError, TypeError) as e:
+                logger.warning(f"Failed to parse JSON array: {e}, treating as single string")
+
+        # Handle both single string and list
+        QTimer.singleShot(0, lambda: self.window.drag_interceptor.handle_drag(paths_list))
 
     @Slot(str)
     def debug_log(self, message: str) -> None: