- Bug 1: No fix needed - frontend already uses PUT for document updates
- Bug 2: Changed folders API to use 'project' param (matches documents)
- Bug 3: GET /folders now works without project filter (lists all folders)
Changes:
- folders.js: Accept 'project' instead of 'projectId', make it optional
- folderService.js: Support listing all folders when projectId is null
- api.js: Updated getFolders() to use 'project' param consistently