feat: middle-click + mod-click on bookmarks opens in new tab

- File bookmarks: middle-click opens in new tab, mod+click opens in new leaf
- Group bookmarks: middle-click opens group's linked file in new tab,
  mod+click opens group's linked file (click still toggles collapse)

src/views/waypoint-view.ts

@@ -540,10 +540,27 @@ export class WaypointView extends ItemView {
 
 				const labelEl = rowEl.createDiv({ cls: 'waypoint-bm-label', text: item.label });
 
-				rowEl.addEventListener('click', () => {
+				rowEl.addEventListener('click', (event: MouseEvent) => {
+					// Mod+click opens group's linked file
+					if (item.filePath && Keymap.isModEvent(event)) {
+						const tfile = this.app.vault.getFileByPath(item.filePath);
+						if (tfile) this.app.workspace.getLeaf(false).openFile(tfile);
+						return;
+					}
 					this.plugin.updateBookmark(item.id, { collapsed: !item.collapsed });
 				});
 
+				// Middle click on group header → open group's linked file in new tab
+				rowEl.addEventListener('mousedown', (event: MouseEvent) => {
+					if (event.button === 1 && item.filePath) {
+						event.preventDefault();
+						const tfile = this.app.vault.getFileByPath(item.filePath);
+						if (tfile) {
+							this.app.workspace.getLeaf('tab').openFile(tfile);
+						}
+					}
+				});
+
 				const childrenContainer = container.createDiv({
 					cls: `waypoint-bookmark-children${item.collapsed ? ' collapsed' : ''}`,
 				});
@@ -559,18 +576,29 @@ export class WaypointView extends ItemView {
 				const labelEl = rowEl.createDiv({ cls: 'waypoint-bm-label', text: item.label });
 				setTooltip(rowEl, item.filePath);
 
-				rowEl.addEventListener('click', () => {
+				rowEl.addEventListener('click', (event: MouseEvent) => {
 					if (item.filePath) {
 						const tfile = this.app.vault.getFileByPath(item.filePath);
 						if (tfile) {
-							const leaf = this.app.workspace.getLeaf(false);
-							leaf.openFile(tfile);
+							const newLeaf = Keymap.isModEvent(event);
+							this.app.workspace.getLeaf(newLeaf as any).openFile(tfile);
 						} else {
 							new Notice('File not found');
 							this.plugin.removeBookmark(item.id);
 						}
 					}
 				});
+
+				// Middle click → open in new tab
+				rowEl.addEventListener('mousedown', (event: MouseEvent) => {
+					if (event.button === 1 && item.filePath) {
+						event.preventDefault();
+						const tfile = this.app.vault.getFileByPath(item.filePath);
+						if (tfile) {
+							this.app.workspace.getLeaf('tab').openFile(tfile);
+						}
+					}
+				});
 			}
 
 			// ── Right-click context menu (both types) ──