Support downloading directories as a zip archive (#106)

* Add directory download as zip feature

Implements the ability for users to download directories as zip files if enabled in config. Adds a new API route for directory zipping, updates UI components to show a download button for directories, and introduces related config and type changes. Also includes a new download icon.

* Windows path bugfix

* Include empty directories in zip archive

* Address feedback

- `isDirectoryDownloadsAllowed` -> `areDirectoryDownloadsAllowed`
- send `parentPath` & `name` to API instead of resolving `fullPath` on client
- call `ensureUserPathIsValidAndSecurelyAccessible` before zipping
- set config `allowDirectoryDownloads` default to `false`
- add `zip` to Dockerfile and replace in-house zip algorithm
- replace `download.svg` with heroicon's `arrow-down-tray`
- `replace` with glob -> `replaceAll` with string

* Cleanup apt-get command

* Remove unused zip archive and directory functions

components/files/MainFiles.tsx

@@ -48,6 +48,7 @@ interface MainFilesProps {
   initialPath: string;
   baseUrl: string;
   isFileSharingAllowed: boolean;
+  areDirectoryDownloadsAllowed: boolean;
   fileShareId?: string;
 }
 
@@ -58,6 +59,7 @@ export default function MainFiles(
     initialPath,
     baseUrl,
     isFileSharingAllowed,
+    areDirectoryDownloadsAllowed,
     fileShareId,
   }: MainFilesProps,
 ) {
@@ -411,6 +413,21 @@ export default function MainFiles(
     moveDirectoryOrFileModal.value = null;
   }
 
+  function onClickDownloadDirectory(parentPath: string, name: string) {
+    // Create download URL with proper path encoding
+    const downloadUrl = `/api/files/download-directory?parentPath=${encodeURIComponent(parentPath)}&name=${
+      encodeURIComponent(name)
+    }`;
+
+    // Create a temporary anchor element to trigger download
+    const link = document.createElement('a');
+    link.href = downloadUrl;
+    link.download = `${name}.zip`;
+    document.body.appendChild(link);
+    link.click();
+    document.body.removeChild(link);
+  }
+
   async function onClickDeleteDirectory(parentPath: string, name: string, isBulkDeleting = false) {
     if (isBulkDeleting || confirm('Are you sure you want to delete this directory?')) {
       if (!isBulkDeleting && isDeleting.value) {
@@ -839,6 +856,7 @@ export default function MainFiles(
           onClickDeleteFile={onClickDeleteFile}
           onClickCreateShare={isFileSharingAllowed ? onClickCreateShare : undefined}
           onClickOpenManageShare={isFileSharingAllowed ? onClickOpenManageShare : undefined}
+          onClickDownloadDirectory={areDirectoryDownloadsAllowed ? onClickDownloadDirectory : undefined}
           fileShareId={fileShareId}
         />