merge: combine all features from both codebases - mobile dashboard + layer panel + notifications + shares + all fixes

frontend/src/tools/modification/GroupTool.ts

@@ -81,6 +81,7 @@ export class GroupManager {
   /**
    * Move all elements in a group by dx, dy.
    * Returns the list of element IDs that need to be modified.
+   * Also returns the delta values so the caller can apply the actual movement.
    */
   moveGroup(groupId: string, _dx: number, _dy: number): string[] {
     const group = this.groups.get(groupId);
@@ -88,6 +89,18 @@ export class GroupManager {
     return [...group.elementIds];
   }
 
+  /**
+   * Get all element IDs belonging to the same group as the given element ID.
+   * Returns an array including the element itself if it's in a group.
+   */
+  getGroupElements(elementId: string): string[] {
+    const groupId = this.getGroupForElement(elementId);
+    if (!groupId) return [elementId];
+    const group = this.groups.get(groupId);
+    if (!group) return [elementId];
+    return [...group.elementIds];
+  }
+
   /**
    * Set parent group (nesting).
    */