Improve gallery video UX and add upload-to-publish media workflow.

Stage raw files in upload/, publish with make sync-media/publish, and polish the lightbox: autoplay, remembered volume, Escape to close, and image/video icons without poster or caption clutter.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/internal/gallery/gallery.go

@@ -16,7 +16,7 @@ type Image struct {
 	Collection     string // event subfolder label, e.g. Anniversary
 	CollectionKey  string // slug for filters
 	Filename       string // basename
-	URL            string
+	URL            string // served file URL (/images/…)
 	ThumbURL       string
 	HeroURL        string
 	IsVideo        bool

app/internal/gallery/media.go

@@ -15,6 +15,9 @@ func isVideo(name string) bool {
 }
 
 func isGalleryMedia(name string) bool {
+	if isWebDerivative(name) {
+		return false
+	}
 	return isJPEG(name) || isVideo(name)
 }
 
@@ -34,3 +37,7 @@ func videoPosterRel(rel string) string {
 	}
 	return strings.TrimSuffix(rel, ext) + ".jpg"
 }
+
+func isWebDerivative(name string) bool {
+	return strings.HasSuffix(strings.ToLower(name), ".web.mp4")
+}

app/internal/gallery/media_test.go

@@ -12,6 +12,15 @@ func TestVideoPosterRel(t *testing.T) {
 	}
 }
 
+func TestIsWebDerivative(t *testing.T) {
+	if !isWebDerivative("clip.web.mp4") {
+		t.Fatal("expected web derivative")
+	}
+	if isGalleryMedia("clip.web.mp4") {
+		t.Fatal("web derivative must not be listed")
+	}
+}
+
 func TestList_includesVideo(t *testing.T) {
 	dir := t.TempDir()
 	album := filepath.Join(dir, "portal")