fix(newos4): download link uses the user's space; WebDAV share copies verified file links; preview fullscreen+share; files->WebDAV upload button (v4.6.45)

- download: URL built from _resolveSpaceName() (config url = logged-in user), not the page space
- WebDAV browser 🔗: shares selected FILES only, URL-encoded, HEAD-verified (200) before claiming success;
  folders offer a tar fallback instead of a guaranteed-403 link
- file manager preview: ⛶ fullscreen + 🔗 copy-link toolbar (was none)
- file manager toolbar: ☁ WebDAV publishes selected/current file via webdav-push
- modules/test/test-download-url.js: 4 PASS
- rebuild bundles, bump v4.6.44 -> v4.6.45 (loader + 3 script tags)

1 files changed, 9 insertions, 1 deletions

diff --git a/modules/core/core-bundle.js b/modules/core/core-bundle.js
index ee2e9d0..3f7e352 100644
--- a/modules/core/core-bundle.js
+++ b/modules/core/core-bundle.js
@@ -6716,7 +6716,15 @@ class FileSystemModule {
                             const baseUrl = wdav.config.url.replace(/\/+$/, '');
                             const hostMatch = baseUrl.match(/^(https?:\/\/[^\/]+)/);
                             const host = hostMatch ? hostMatch[1] : 'https://webx11.duckdns.org';
-                            downloadUrl = host + '/spaces/' + wdav._spaceName + '/downloads/' + encodeURIComponent(fname);
+                            // Build the public URL the user can tap.
+                            // The URL must use the space the PUT actually went to
+                            // (config.url = the logged-in user's space). _spaceName is
+                            // derived from the page path (/spaces/newos4/…) and is wrong
+                            // for users downloading into their own space (2026-10-21).
+                            const urlSpace = (typeof wdav._resolveSpaceName === 'function' && wdav._resolveSpaceName()) ||
+                                             (wdav._extractSpaceNameFromUrl && wdav._extractSpaceNameFromUrl(wdav.config.url)) ||
+                                             wdav._spaceName;
+                            downloadUrl = host + '/spaces/' + urlSpace + '/downloads/' + encodeURIComponent(fname);
                             this.terminal.print('Uploaded to: ' + downloadUrl, 'success');
                         } else {
                             this.terminal.print('WebDAV push failed: HTTP ' + resp.status, 'warning');