Fix image signed URLs ignoring updated public base URL.

Resolve public_base_url at SignURL time so admin settings apply without restart.

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

internal/prediction/service.go

@@ -24,20 +24,19 @@ type Service struct {
 	db        *gorm.DB
 	cache     *cache.Store
 	images    *imagestore.Store
-	hub       *Hub
-	publicURL string
-	waitSec   int64
+	hub     *Hub
+	waitSec int64
 	mu        sync.Mutex
 	running   map[string]context.CancelFunc
 }
 
-func NewService(db *gorm.DB, c *cache.Store, images *imagestore.Store, publicURL string, waitSec int64) *Service {
+func NewService(db *gorm.DB, c *cache.Store, images *imagestore.Store, waitSec int64) *Service {
 	if waitSec <= 0 {
 		waitSec = 60
 	}
 	return &Service{
 		db: db, cache: c, images: images, hub: NewHub(),
-		publicURL: strings.TrimRight(publicURL, "/"), waitSec: waitSec,
+		waitSec: waitSec,
 		running: make(map[string]context.CancelFunc),
 	}
 }