feat: add photo cap per event and Portuguese (pt-BR) locale

- Add photo_cap column to events table (migration 074) to limit photos per event
- Enforce photo cap in upload route, returning 400 when limit exceeded
- Pass photo_cap through all event CRUD routes and frontend forms
- Add complete Portuguese (pt-BR) translation (2300+ strings)
- Register pt locale in i18n config, language selector, date formatting
- Add photoCap/photoCapHelp translation keys to all locale files (en, de, ru, pt)

backend/migrations/core/074_add_photo_cap.js

@@ -0,0 +1,13 @@
+const { addColumnIfNotExists } = require('../helpers');
+
+exports.up = async function(knex) {
+  console.log('Running migration: 074_add_photo_cap');
+  await addColumnIfNotExists(knex, 'events', 'photo_cap', (table) => {
+    table.integer('photo_cap').nullable().defaultTo(null);
+  });
+  console.log('Migration 074_add_photo_cap completed');
+};
+
+exports.down = async function(knex) {
+  console.log('Rollback: 074_add_photo_cap');
+};

backend/src/routes/adminEvents-enhanced.js

@@ -42,7 +42,8 @@ router.post('/', adminAuth, requirePermission('events.create'), [
       color_theme = null,
       expiration_days = 30,
       allow_user_uploads = false,
-      upload_category_id = null
+      upload_category_id = null,
+      photo_cap = null
     } = req.body;
     
     // Validate password strength for gallery
@@ -105,7 +106,8 @@ router.post('/', adminAuth, requirePermission('events.create'), [
       expires_at: expires_at.toISOString(),
       created_at: new Date().toISOString(),
       allow_user_uploads,
-      upload_category_id
+      upload_category_id,
+      photo_cap: photo_cap || null
     }).returning('id');
     
     // Handle both PostgreSQL (returns array of objects) and SQLite (returns array of IDs)

backend/src/routes/adminEvents.js

@@ -256,7 +256,9 @@ router.post('/', adminAuth, requirePermission('events.create'), [
       header_style = 'standard',
       hero_divider_style = 'wave',
       // Hero image anchor position (#162)
-      hero_image_anchor = 'center'
+      hero_image_anchor = 'center',
+      // Photo cap
+      photo_cap = null
     } = req.body;
 
     const customerName = getCustomerNameFromPayload(req.body);
@@ -416,7 +418,8 @@ router.post('/', adminAuth, requirePermission('events.create'), [
       hero_logo_position: hero_logo_position || 'top',
       header_style: effectiveHeaderStyle || 'standard',
       hero_divider_style: effectiveDividerStyle || 'wave',
-      hero_image_anchor: hero_image_anchor || 'center'
+      hero_image_anchor: hero_image_anchor || 'center',
+      photo_cap: photo_cap || null
     }).returning('id');
     
     // Handle both PostgreSQL (returns array of objects) and SQLite (returns array of IDs)
@@ -479,6 +482,7 @@ router.post('/', adminAuth, requirePermission('events.create'), [
       customer_name: customerName,
       customer_email: customerEmail,
       require_password: requirePassword,
+      photo_cap: photo_cap || null,
       share_link: shareUrl,
       expires_at: expires_at ? expires_at.toISOString() : null,
       created_at: new Date().toISOString()

backend/src/routes/adminPhotos.js

@@ -170,7 +170,30 @@ router.post('/:eventId/upload', adminAuth, requirePermission('photos.upload'), u
       }
       return res.status(404).json({ error: 'Event not found' });
     }
-    
+
+    // Enforce photo cap if set
+    if (event.photo_cap && event.photo_cap > 0) {
+      const existingPhotoCount = await db('photos')
+        .where({ event_id: eventId })
+        .count('id as count')
+        .first();
+      const currentCount = parseInt(existingPhotoCount.count) || 0;
+      const newFilesCount = (req.files && req.files.length) || 0;
+      if (currentCount + newFilesCount > event.photo_cap) {
+        // Clean up temp files
+        if (req.tempUploadPath) {
+          try {
+            await fs.rm(req.tempUploadPath, { recursive: true, force: true });
+          } catch (e) {
+            console.error('Failed to clean up temp path:', e);
+          }
+        }
+        return res.status(400).json({
+          error: `Photo cap exceeded. This event allows a maximum of ${event.photo_cap} photos. Currently ${currentCount} photos exist, and you are trying to upload ${newFilesCount} more.`
+        });
+      }
+    }
+
     if (!req.files || req.files.length === 0) {
       console.error('No files in request. req.files:', req.files);
       console.error('Request body keys:', Object.keys(req.body));

backend/src/routes/auth.js

@@ -280,7 +280,8 @@ router.post('/gallery/verify', [
         expires_at: event.expires_at,
         allow_user_uploads: event.allow_user_uploads,
         upload_category_id: event.upload_category_id,
-        require_password: requiresPassword
+        require_password: requiresPassword,
+        photo_cap: event.photo_cap
       }
     });
   } catch (error) {
@@ -353,7 +354,8 @@ router.post('/gallery/share-login', [
         expires_at: event.expires_at,
         allow_user_uploads: event.allow_user_uploads,
         upload_category_id: event.upload_category_id,
-        require_password: requiresPassword
+        require_password: requiresPassword,
+        photo_cap: event.photo_cap
       }
     });
   } catch (error) {

backend/src/services/eventService.js

@@ -138,7 +138,9 @@ const createEvent = async (eventData) => {
     show_feedback_to_guests,
     // Upload settings
     allow_user_uploads,
-    upload_category_id
+    upload_category_id,
+    // Photo cap
+    photo_cap
   } = eventData;
 
   const requirePassword = parseBooleanInput(require_password, true);
@@ -207,7 +209,9 @@ const createEvent = async (eventData) => {
     show_feedback_to_guests: show_feedback_to_guests !== undefined ? formatBoolean(show_feedback_to_guests) : undefined,
     // Upload settings
     allow_user_uploads: allow_user_uploads !== undefined ? formatBoolean(allow_user_uploads) : undefined,
-    upload_category_id: upload_category_id || null
+    upload_category_id: upload_category_id || null,
+    // Photo cap
+    photo_cap: photo_cap || null
   };
 
   // Remove undefined values

backend/src/utils/dateFormatter.js

@@ -54,6 +54,8 @@ async function formatDate(date, language = 'en') {
     let locale = dateConfig.locale || 'en-GB';
     if (language === 'de') {
       locale = 'de-DE';
+    } else if (language === 'pt') {
+      locale = 'pt-BR';
     } else if (language === 'en' && dateConfig.format === 'MM/DD/YYYY') {
       locale = 'en-US';
     }