Merge remote-tracking branch 'origin/main' into pr-834

# Conflicts:
#	frontend/src/components/gallery/UserPhotoUpload.tsx
#	frontend/src/i18n/locales/de.json
#	frontend/src/i18n/locales/en.json
#	frontend/src/i18n/locales/es.json
#	frontend/src/i18n/locales/fr.json
#	frontend/src/i18n/locales/nl.json
#	frontend/src/i18n/locales/pt.json
#	frontend/src/i18n/locales/ru.json
#	frontend/src/i18n/locales/sl.json
#	frontend/src/services/publicSettings.service.ts
#	frontend/src/utils/__tests__/fileTypes.test.ts

backend/__tests__/routes/adminEvents.smoke.test.js

@@ -180,6 +180,27 @@ describe('admin events CRUD endpoints (smoke)', () => {
       });
       expect(res.status).toBe(404);
     });
+
+    // #822 — hero_logo_visible/position are nullable (null = "inherit the global
+    // branding toggle"), but the validator used .optional() without
+    // { nullable: true }, so an explicit null was rejected with 400.
+    it('accepts hero_logo_visible: null and stores NULL (inherit)', async () => {
+      const id = await insertEvent(db, adminId, { hero_logo_visible: 1 });
+      const res = await auth(request(app).put(`/api/admin/events/${id}`)).send({
+        hero_logo_visible: null,
+      });
+      expect(res.status).toBe(200);
+      const row = await db('events').where({ id }).first();
+      expect(row.hero_logo_visible).toBeNull();
+    });
+
+    it('still rejects a non-boolean hero_logo_visible', async () => {
+      const id = await insertEvent(db, adminId);
+      const res = await auth(request(app).put(`/api/admin/events/${id}`)).send({
+        hero_logo_visible: 'maybe',
+      });
+      expect(res.status).toBe(400);
+    });
   });
 
   describe('DELETE /:id', () => {

backend/__tests__/services/imageProcessorRaw.test.js

@@ -0,0 +1,50 @@
+/**
+ * Unit tests for the RAW/DNG handling helpers (#821). The actual exiftool
+ * extraction can only be exercised in the built image (exiftool isn't a dev
+ * dependency), so these cover the gating logic: which files are treated as RAW,
+ * and that ordinary images pass through untouched (zero cost / no extraction).
+ */
+const path = require('path');
+const { isRawFilename, withProcessableImage, RAW_EXTENSIONS } = require('../../src/services/imageProcessor');
+
+describe('isRawFilename', () => {
+  it('recognises common RAW / DNG extensions', () => {
+    for (const ext of ['dng', 'cr2', 'cr3', 'nef', 'arw', 'raf', 'rw2', 'orf']) {
+      expect(isRawFilename(`IMG_1234.${ext}`)).toBe(true);
+      expect(isRawFilename(`IMG_1234.${ext.toUpperCase()}`)).toBe(true); // case-insensitive
+    }
+  });
+
+  it('does not treat ordinary images/videos as RAW', () => {
+    for (const name of ['photo.jpg', 'photo.jpeg', 'photo.png', 'photo.webp', 'clip.mp4', 'clip.mov', 'photo.heic']) {
+      expect(isRawFilename(name)).toBe(false);
+    }
+  });
+
+  it('is null/empty safe', () => {
+    expect(isRawFilename(null)).toBe(false);
+    expect(isRawFilename('')).toBe(false);
+    expect(isRawFilename('noextension')).toBe(false);
+  });
+
+  it('RAW_EXTENSIONS includes dng (Apple ProRAW)', () => {
+    expect(RAW_EXTENSIONS.has('dng')).toBe(true);
+  });
+});
+
+describe('withProcessableImage', () => {
+  it('passes ordinary images through with no extraction and a no-op cleanup', async () => {
+    const localPath = '/tmp/whatever/photo.jpg';
+    const proc = await withProcessableImage(localPath, 'photo.jpg');
+    expect(proc.path).toBe(localPath);          // unchanged — sharp reads it directly
+    expect(proc.outputBasename).toBeUndefined(); // generators keep their default naming
+    await expect(Promise.resolve(proc.cleanup())).resolves.toBeUndefined();
+  });
+
+  it('routes RAW files to extraction (which fails cleanly without exiftool/preview)', async () => {
+    // In the dev sandbox exiftool isn't installed, so extraction throws — the
+    // caller turns that into a normal processing failure. In the built image
+    // (exiftool present) this instead returns the embedded JPEG preview.
+    await expect(withProcessableImage('/tmp/whatever/IMG_1234.dng', 'IMG_1234.dng')).rejects.toThrow();
+  });
+});

backend/__tests__/services/photoProcessor.processPhoto.test.js

@@ -75,6 +75,13 @@ jest.mock('../../src/services/imageProcessor', () => {
     withLocalCopy: jest.fn(async (key, fn) =>
       fn(`/tmp/local-copy-${require('path').basename(key)}`)
     ),
+    // Pass-through for ordinary (non-RAW) images: returns the path unchanged
+    // with a no-op cleanup, matching the real helper's behaviour for jpg/png.
+    withProcessableImage: jest.fn(async (localPath) => ({
+      path: localPath,
+      outputBasename: undefined,
+      cleanup: () => {},
+    })),
   };
 });