fix: resolve branding display issues and invitation parsing errors

Fixes #84 - Logo and favicon not displaying on branding page and galleries
Fixes #85 - Invitations showing undefined expiresAt causing parseISO errors

Changes:
- Fix nginx.conf: Add ^~ modifier to /uploads location to prioritize proxy over static file matching
- Fix vite.config.ts: Add /uploads proxy for development environment
- Fix BrandingPage.tsx: Include logo_url from branding settings instead of expecting it from theme
- Fix adminUsers.js: Add transformInvitation() to convert snake_case DB fields to camelCase API response
- Fix publicSettings.js: Add branding_hide_powered_by to public settings API response
- Update README.md: Mark Multiple Administrators feature as implemented
- Bump version to 2.2.1

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "picpeak-backend",
-  "version": "1.1.15",
+  "version": "2.2.1",
   "description": "Backend for PicPeak event photo sharing platform",
   "main": "server.js",
   "scripts": {

backend/src/routes/adminUsers.js

@@ -45,6 +45,20 @@ function transformRole(role) {
   };
 }
 
+/**
+ * Transform invitation object from snake_case (DB) to camelCase (API)
+ */
+function transformInvitation(invitation) {
+  return {
+    id: invitation.id,
+    email: invitation.email,
+    expiresAt: invitation.expires_at,
+    createdAt: invitation.created_at,
+    roleName: invitation.role_name,
+    invitedBy: invitation.invited_by
+  };
+}
+
 /**
  * GET /me/permissions
  * Get current user's permissions
@@ -81,7 +95,7 @@ router.get('/roles', adminAuth, requirePermission('users.view'), handleAsync(asy
  */
 router.get('/invitations', adminAuth, requirePermission('users.view'), handleAsync(async (req, res) => {
   const invitations = await userManagementService.getPendingInvitations();
-  res.json({ invitations });
+  res.json({ invitations: invitations.map(transformInvitation) });
 }));
 
 /**

backend/src/routes/publicSettings.js

@@ -58,6 +58,7 @@ router.get('/', async (req, res) => {
       branding_logo_display_header: settingsObject.branding_logo_display_header !== false,
       branding_logo_display_hero: settingsObject.branding_logo_display_hero !== false,
       branding_logo_display_mode: settingsObject.branding_logo_display_mode || 'logo_and_text',
+      branding_hide_powered_by: settingsObject.branding_hide_powered_by === true,
       theme_config: settingsObject.theme_config || null,
       default_language: settingsObject.general_default_language || 'en',
       enable_analytics: settingsObject.general_enable_analytics !== false,