feat: add rename functionality to file editor

Add ability to rename files and folders through the context menu:
- Add rename_path Tauri command in backend
- Add renamePath function to editor store that updates open tabs
- Add rename option to context menu with pencil icon
- Update InputDialog to support initial value for rename operations

src-tauri/src/commands.rs

@@ -535,6 +535,27 @@ pub async fn delete_directory(path: String) -> Result<(), String> {
     Ok(())
 }
 
+#[tauri::command]
+pub async fn rename_path(old_path: String, new_path: String) -> Result<(), String> {
+    use std::fs;
+    use std::path::Path;
+
+    let old = Path::new(&old_path);
+    let new = Path::new(&new_path);
+
+    if !old.exists() {
+        return Err("Path does not exist".to_string());
+    }
+
+    if new.exists() {
+        return Err("Destination already exists".to_string());
+    }
+
+    fs::rename(old, new).map_err(|e| format!("Failed to rename: {}", e))?;
+
+    Ok(())
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

src-tauri/src/lib.rs

@@ -158,6 +158,7 @@ pub fn run() {
             create_directory,
             delete_file,
             delete_directory,
+            rename_path,
         ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");

src/lib/components/editor/FileBrowser.svelte

@@ -39,7 +39,7 @@
 
   // Dialog state
   let dialog = $state<{
-    type: "newFile" | "newFolder" | "delete" | null;
+    type: "newFile" | "newFolder" | "delete" | "rename" | null;
     parentPath: string;
     targetEntry: FileEntry | null;
   }>({
@@ -81,6 +81,10 @@
     dialog = { type: "delete", parentPath: "", targetEntry: entry };
   }
 
+  function openRenameDialog(entry: FileEntry) {
+    dialog = { type: "rename", parentPath: "", targetEntry: entry };
+  }
+
   function closeDialog() {
     dialog = { type: null, parentPath: "", targetEntry: null };
   }
@@ -106,6 +110,12 @@
     closeDialog();
   }
 
+  async function handleRename(newName: string) {
+    if (!dialog.targetEntry) return;
+    await editorStore.renamePath(dialog.targetEntry.path, newName);
+    closeDialog();
+  }
+
   function handleNewFile() {
     openNewFileDialog($currentDirectory);
   }
@@ -211,6 +221,7 @@
     currentDirectory={$currentDirectory}
     onNewFile={openNewFileDialog}
     onNewFolder={openNewFolderDialog}
+    onRename={openRenameDialog}
     onDelete={openDeleteDialog}
     onClose={closeContextMenu}
   />
@@ -250,6 +261,17 @@
   />
 {/if}
 
+{#if dialog.type === "rename" && dialog.targetEntry}
+  <InputDialog
+    title="Rename {dialog.targetEntry.isDirectory ? 'Folder' : 'File'}"
+    placeholder="Enter new name..."
+    confirmText="Rename"
+    initialValue={dialog.targetEntry.name}
+    onConfirm={handleRename}
+    onCancel={closeDialog}
+  />
+{/if}
+
 <style>
   .file-browser {
     display: flex;

src/lib/components/editor/FileContextMenu.svelte

@@ -8,12 +8,22 @@
     currentDirectory: string;
     onNewFile: (parentPath: string) => void;
     onNewFolder: (parentPath: string) => void;
+    onRename: (entry: FileEntry) => void;
     onDelete: (entry: FileEntry) => void;
     onClose: () => void;
   }
 
-  let { x, y, targetEntry, currentDirectory, onNewFile, onNewFolder, onDelete, onClose }: Props =
-    $props();
+  let {
+    x,
+    y,
+    targetEntry,
+    currentDirectory,
+    onNewFile,
+    onNewFolder,
+    onRename,
+    onDelete,
+    onClose,
+  }: Props = $props();
 
   function handleNewFile() {
     const parentPath = targetEntry?.isDirectory ? targetEntry.path : currentDirectory;
@@ -27,6 +37,13 @@
     onClose();
   }
 
+  function handleRename() {
+    if (targetEntry) {
+      onRename(targetEntry);
+      onClose();
+    }
+  }
+
   function handleDelete() {
     if (targetEntry) {
       onDelete(targetEntry);
@@ -91,6 +108,21 @@
     {#if targetEntry}
       <div class="my-1 border-t border-gray-700"></div>
 
+      <button
+        class="flex w-full items-center gap-2 px-3 py-1.5 text-left text-sm text-gray-200 hover:bg-gray-700"
+        onclick={handleRename}
+      >
+        <svg class="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+          <path
+            stroke-linecap="round"
+            stroke-linejoin="round"
+            stroke-width="2"
+            d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z"
+          />
+        </svg>
+        Rename
+      </button>
+
       <button
         class="flex w-full items-center gap-2 px-3 py-1.5 text-left text-sm text-red-400 hover:bg-gray-700"
         onclick={handleDelete}

src/lib/components/editor/InputDialog.svelte

@@ -4,6 +4,7 @@
     placeholder?: string;
     confirmText?: string;
     cancelText?: string;
+    initialValue?: string;
     onConfirm: (value: string) => void;
     onCancel: () => void;
   }
@@ -13,16 +14,22 @@
     placeholder = "",
     confirmText = "Create",
     cancelText = "Cancel",
+    initialValue = "",
     onConfirm,
     onCancel,
   }: Props = $props();
 
-  let inputValue = $state("");
+  // svelte-ignore state_referenced_locally - intentionally capture initial value once
+  let inputValue = $state(initialValue);
   let inputElement: HTMLInputElement | undefined = $state();
 
   $effect(() => {
     if (inputElement) {
       inputElement.focus();
+      // Select all text for rename operations
+      if (initialValue) {
+        inputElement.select();
+      }
     }
   });
 

src/lib/stores/editor.ts

@@ -340,6 +340,47 @@ function createEditorStore() {
     });
   }
 
+  async function renamePath(oldPath: string, newName: string): Promise<boolean> {
+    const parentPath = oldPath.substring(0, oldPath.lastIndexOf("/"));
+    const newPath = `${parentPath}/${newName}`;
+
+    try {
+      await invoke("rename_path", { oldPath, newPath });
+
+      // Update any open tabs that reference this path
+      state.update((s) => ({
+        ...s,
+        tabs: s.tabs.map((t) => {
+          if (t.filePath === oldPath) {
+            // Exact match - this file was renamed
+            return {
+              ...t,
+              filePath: newPath,
+              fileName: newName,
+            };
+          }
+          if (t.filePath.startsWith(oldPath + "/")) {
+            // File is inside a renamed directory
+            const relativePath = t.filePath.substring(oldPath.length);
+            return {
+              ...t,
+              filePath: newPath + relativePath,
+            };
+          }
+          return t;
+        }),
+      }));
+
+      // Refresh the parent directory
+      await refreshDirectory(parentPath);
+      return true;
+    } catch (error) {
+      console.error("Failed to rename:", error);
+      saveError.set(`Failed to rename: ${error}`);
+      return false;
+    }
+  }
+
   function showEditor() {
     isEditorVisible.set(true);
   }
@@ -369,6 +410,7 @@ function createEditorStore() {
     deleteFile,
     deleteDirectory,
     refreshDirectory,
+    renamePath,
 
     tabs: derived(state, ($state) => $state.tabs),
     activeTab: derived(state, ($state) => $state.tabs.find((t) => t.id === $state.activeTabId)),