fix: upload failure, share dialog, shared view styling, dark mode fixes

- Fix 'folder_id is required' upload error by adding create_home_folder
  through the full hexagonal architecture (trait, service, repository, auth)
- Fix double upload issue with _isUploading concurrency guard
- Fix Share context menu doing nothing (ID collision between sharedView
  and main share dialog resolved with sv- prefix)
- Fix Compartidos tab duplicate headers and broken layout
- Add missing .shared-dialog CSS with dark mode support
- Fix dark mode white backgrounds on empty-state, shared-filters,
  trash-actions, action-btn, and header
- Fix i18n key mismatches in sharedView
- Bump version to 0.4.1

Closes #120

static/js/ui.js

@@ -287,10 +287,15 @@ const ui = {
 
         dropzone.addEventListener('drop', (e) => {
             e.preventDefault();
+            e.stopPropagation(); // Prevent bubbling to document's drop handler (avoids double upload)
+            e._oxiHandled = true;  // Mark as handled for document-level fallback
             dropzone.classList.remove('active');
             if (e.dataTransfer.files.length > 0) {
                 fileOps.uploadFiles(e.dataTransfer.files);
             }
+            setTimeout(() => {
+                dropzone.style.display = 'none';
+            }, 500);
         });
 
         // Document-wide drag and drop
@@ -318,6 +323,9 @@ const ui = {
             e.preventDefault();
             dropzone.classList.remove('active');
 
+            // Skip if already handled by the dropzone handler (defensive against bubble leaks)
+            if (e._oxiHandled) return;
+
             if (e.dataTransfer.files.length > 0) {
                 fileOps.uploadFiles(e.dataTransfer.files);
             }