diff --git a/txt b/txt
deleted file mode 100644
index 3e9f489..0000000
--- a/txt
+++ /dev/null
@@ -1,2 +0,0 @@
-dd
-
diff --git a/webui/backend/tests/golden/__pycache__/test_ui_smoke_golden.cpython-313.pyc b/webui/backend/tests/golden/__pycache__/test_ui_smoke_golden.cpython-313.pyc
index 8836536..df2bea2 100644
Binary files a/webui/backend/tests/golden/__pycache__/test_ui_smoke_golden.cpython-313.pyc and b/webui/backend/tests/golden/__pycache__/test_ui_smoke_golden.cpython-313.pyc differ
diff --git a/webui/backend/tests/golden/test_ui_smoke_golden.py b/webui/backend/tests/golden/test_ui_smoke_golden.py
index 397bb2f..f85ee70 100644
--- a/webui/backend/tests/golden/test_ui_smoke_golden.py
+++ b/webui/backend/tests/golden/test_ui_smoke_golden.py
@@ -30,6 +30,9 @@ class UiSmokeGoldenTest(unittest.TestCase):
         self.assertIn('id="footer-bar"', body)
         self.assertIn('id="left-pane"', body)
         self.assertIn('id="right-pane"', body)
+        self.assertIn('id="left-items"', body)
+        self.assertIn('id="right-items"', body)
+        self.assertIn('id="mkdir-btn"', body)
         self.assertIn('id="left-breadcrumbs"', body)
         self.assertIn('id="right-breadcrumbs"', body)
         self.assertNotIn('id="bookmarks-panel"', body)
diff --git a/webui/html/app.js b/webui/html/app.js
index 33b2eb7..d0cb5be 100644
--- a/webui/html/app.js
+++ b/webui/html/app.js
@@ -41,6 +41,16 @@ function setActionError(action, err) {
   setError("actions-error", `${action}: ${err.message}`);
 }
 
+function showActionSummary(action, successes, failures, firstError) {
+  const base = `${action}: ${successes} success, ${failures} failed`;
+  if (firstError) {
+    setError("actions-error", `${base}. First error: ${firstError}`);
+  } else {
+    setError("actions-error", "");
+  }
+  setStatus(base);
+}
+
 async function apiRequest(method, url, body) {
   const options = { method, headers: {} };
   if (body !== undefined) {
@@ -103,13 +113,15 @@ function toggleSelection(pane, item) {
 }
 
 function updateActionButtons() {
-  const selected = activePaneState().selectedItem;
-  const hasSelection = Boolean(selected);
-  const isFile = hasSelection && selected.kind === "file";
-  document.getElementById("rename-btn").disabled = !hasSelection;
+  const selectedItems = activePaneState().selectedItems;
+  const count = selectedItems.length;
+  const hasSelection = count > 0;
+  const exactlyOne = count === 1;
+  const allFiles = hasSelection && selectedItems.every((item) => item.kind === "file");
+  document.getElementById("rename-btn").disabled = !exactlyOne;
   document.getElementById("delete-btn").disabled = !hasSelection;
-  document.getElementById("copy-btn").disabled = !isFile;
-  document.getElementById("move-btn").disabled = !isFile;
+  document.getElementById("copy-btn").disabled = !allFiles;
+  document.getElementById("move-btn").disabled = !allFiles;
 }
 
 function currentParentPath(path) {
@@ -133,7 +145,6 @@ function renderBreadcrumbs(pane, path) {
     const crumbPath = aggregate;
     const crumb = createButton(parts[i], () => {
       setActivePane(pane);
-      console.debug("[breadcrumbs] click", { pane, crumbPath });
       navigateTo(pane, crumbPath);
     });
     crumb.type = "button";
@@ -141,7 +152,6 @@ function renderBreadcrumbs(pane, path) {
       ev.preventDefault();
       ev.stopPropagation();
       setActivePane(pane);
-      console.debug("[breadcrumbs] click", { pane, crumbPath });
       navigateTo(pane, crumbPath);
     };
     nav.append(crumb);
@@ -239,11 +249,6 @@ async function loadBrowsePane(pane) {
       path: model.currentPath,
       show_hidden: String(model.showHidden),
     });
-    console.debug("[browse] request", {
-      pane,
-      path: model.currentPath,
-      show_hidden: model.showHidden,
-    });
     const data = await apiRequest("GET", `/api/browse?${query.toString()}`);
     model.currentPath = data.path;
     document.getElementById(`${pane}-current-path`).textContent = data.path;
@@ -299,7 +304,6 @@ async function loadBrowsePane(pane) {
 }
 
 function navigateTo(pane, path) {
-  console.debug("[navigate] pane-path", { pane, path });
   paneState(pane).currentPath = path;
   setSelectedItem(pane, null);
   loadBrowsePane(pane);
@@ -329,10 +333,11 @@ async function createFolderForActivePane() {
 
 async function renameSelected() {
   const pane = state.activePane;
-  const selected = paneState(pane).selectedItem;
-  if (!selected) {
+  const selectedItems = paneState(pane).selectedItems;
+  if (selectedItems.length !== 1) {
     return;
   }
+  const selected = selectedItems[0];
   const newName = window.prompt("New name", selected.name);
   if (!newName) {
     return;
@@ -352,21 +357,31 @@ async function renameSelected() {
 
 async function deleteSelected() {
   const pane = state.activePane;
-  const selected = paneState(pane).selectedItem;
-  if (!selected) {
+  const selectedItems = [...paneState(pane).selectedItems];
+  if (selectedItems.length === 0) {
     return;
   }
-  if (!window.confirm(`Delete ${selected.path}?`)) {
+  if (!window.confirm(`Delete ${selectedItems.length} selected item(s)?`)) {
     return;
   }
   setError("actions-error", "");
-  try {
-    await apiRequest("POST", "/api/files/delete", { path: selected.path });
-    setSelectedItem(pane, null);
-    await loadBrowsePane(pane);
-  } catch (err) {
-    setActionError("Delete", err);
+  let successes = 0;
+  let failures = 0;
+  let firstError = null;
+  for (const item of selectedItems) {
+    try {
+      await apiRequest("POST", "/api/files/delete", { path: item.path });
+      successes += 1;
+    } catch (err) {
+      failures += 1;
+      if (!firstError) {
+        firstError = `${item.path}: ${err.message}`;
+      }
+    }
   }
+  setSelectedItem(pane, null);
+  await loadBrowsePane(pane);
+  showActionSummary("Delete", successes, failures, firstError);
 }
 
 function defaultDestination(sourcePath, targetBasePath) {
@@ -377,58 +392,84 @@ function defaultDestination(sourcePath, targetBasePath) {
 async function startCopySelected() {
   const sourcePane = state.activePane;
   const destinationPane = otherPane(sourcePane);
-  const selected = paneState(sourcePane).selectedItem;
-  if (!selected || selected.kind !== "file") {
+  const selectedItems = [...paneState(sourcePane).selectedItems];
+  if (selectedItems.length === 0) {
     return;
   }
-  const destination = window.prompt(
-    "Copy destination (full path)",
-    defaultDestination(selected.path, paneState(destinationPane).currentPath),
+  const baseDestination = window.prompt(
+    "Copy destination base path (full path)",
+    paneState(destinationPane).currentPath,
   );
-  if (!destination) {
+  if (!baseDestination) {
     return;
   }
   setError("actions-error", "");
-  try {
-    const result = await apiRequest("POST", "/api/files/copy", {
-      source: selected.path,
-      destination,
-    });
-    state.selectedTaskId = result.task_id;
-    setStatus(`Copy task queued: ${result.task_id}`);
-    await Promise.all([loadBrowsePane("left"), loadBrowsePane("right")]);
-  } catch (err) {
-    setActionError("Copy", err);
+  let successes = 0;
+  let failures = 0;
+  let firstError = null;
+  for (const item of selectedItems) {
+    const destination = defaultDestination(item.path, baseDestination);
+    try {
+      if (item.kind !== "file") {
+        throw new Error("Only files are supported for copy");
+      }
+      const result = await apiRequest("POST", "/api/files/copy", {
+        source: item.path,
+        destination,
+      });
+      state.selectedTaskId = result.task_id;
+      successes += 1;
+    } catch (err) {
+      failures += 1;
+      if (!firstError) {
+        firstError = `${item.path}: ${err.message}`;
+      }
+    }
   }
+  await Promise.all([loadBrowsePane("left"), loadBrowsePane("right")]);
+  showActionSummary("Copy", successes, failures, firstError);
 }
 
 async function startMoveSelected() {
   const sourcePane = state.activePane;
   const destinationPane = otherPane(sourcePane);
-  const selected = paneState(sourcePane).selectedItem;
-  if (!selected || selected.kind !== "file") {
+  const selectedItems = [...paneState(sourcePane).selectedItems];
+  if (selectedItems.length === 0) {
     return;
   }
-  const destination = window.prompt(
-    "Move destination (full path)",
-    defaultDestination(selected.path, paneState(destinationPane).currentPath),
+  const baseDestination = window.prompt(
+    "Move destination base path (full path)",
+    paneState(destinationPane).currentPath,
   );
-  if (!destination) {
+  if (!baseDestination) {
     return;
   }
   setError("actions-error", "");
-  try {
-    const result = await apiRequest("POST", "/api/files/move", {
-      source: selected.path,
-      destination,
-    });
-    state.selectedTaskId = result.task_id;
-    setSelectedItem(sourcePane, null);
-    setStatus(`Move task queued: ${result.task_id}`);
-    await Promise.all([loadBrowsePane("left"), loadBrowsePane("right")]);
-  } catch (err) {
-    setActionError("Move", err);
+  let successes = 0;
+  let failures = 0;
+  let firstError = null;
+  for (const item of selectedItems) {
+    const destination = defaultDestination(item.path, baseDestination);
+    try {
+      if (item.kind !== "file") {
+        throw new Error("Only files are supported for move");
+      }
+      const result = await apiRequest("POST", "/api/files/move", {
+        source: item.path,
+        destination,
+      });
+      state.selectedTaskId = result.task_id;
+      successes += 1;
+    } catch (err) {
+      failures += 1;
+      if (!firstError) {
+        firstError = `${item.path}: ${err.message}`;
+      }
+    }
   }
+  setSelectedItem(sourcePane, null);
+  await Promise.all([loadBrowsePane("left"), loadBrowsePane("right")]);
+  showActionSummary("Move", successes, failures, firstError);
 }
 
 async function addBookmark() {