fix: keep workspace rename double-click reachable

static/ui.js

@@ -5653,6 +5653,7 @@ function _renderTreeItems(container, entries, depth){
     // Name
     const nameEl=document.createElement('span');
     nameEl.className='file-name';nameEl.textContent=item.name;nameEl.title=t('double_click_rename');
+    nameEl.onclick=(e)=>e.stopPropagation();
     nameEl.ondblclick=(e)=>{
       e.stopPropagation();
       // For directories, double-click navigates (breadcrumb view)

tests/test_workspace_tree_rename.py

@@ -0,0 +1,22 @@
+from pathlib import Path
+
+
+REPO_ROOT = Path(__file__).resolve().parents[1]
+UI_JS = (REPO_ROOT / "static" / "ui.js").read_text(encoding="utf-8")
+
+
+def test_workspace_file_name_click_stops_before_dblclick_rename():
+    """Clicking a file name must not bubble to the row open handler before dblclick rename."""
+    name_start = UI_JS.index("const nameEl=document.createElement('span');")
+    dblclick_idx = UI_JS.index("nameEl.ondblclick=(e)=>", name_start)
+    click_idx = UI_JS.find("nameEl.onclick=(e)=>e.stopPropagation();", name_start, dblclick_idx)
+
+    assert click_idx != -1, (
+        "workspace file-tree name span must stop click propagation before its dblclick "
+        "rename handler so the row openFile() click does not win the first click"
+    )
+
+
+def test_workspace_file_row_click_still_opens_file_preview():
+    """Only the name span should swallow clicks; the rest of the file row still opens preview."""
+    assert "el.onclick=async()=>openFile(item.path);" in UI_JS