fix(deploy): expose generated video files

infra/docker/compose.yml

@@ -66,6 +66,11 @@ services:
 
 volumes:
   generated-files:
+    driver: local
+    driver_opts:
+      type: none
+      o: bind
+      device: /host/var/lib/xiaoxia-saas-staging/generated
 
 networks:
   xiaoxia-net:

infra/docker/deploy-staging.sh

@@ -22,7 +22,7 @@ ensure_container_running() {
 
 cd "$ROOT_DIR"
 cp "$ENV_FILE" "$ROOT_DIR/.env"
-mkdir -p "$ROOT_DIR/apps/web/public"
+mkdir -p "$ROOT_DIR/apps/web/public" /host/var/lib/xiaoxia-saas-staging/generated
 [ -f "$ROOT_DIR/apps/web/public/.keep" ] || printf 'placeholder' > "$ROOT_DIR/apps/web/public/.keep"
 
 ensure_container_running xiaoxia-postgres

infra/nginx/xiaoxia-saas.conf

@@ -59,6 +59,16 @@ server {
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header X-Forwarded-Proto $scheme;
     }
+
+    # Generated video files
+    location /generated-files/ {
+        alias /var/lib/xiaoxia-saas-staging/generated/;
+        types {
+            video/mp4 mp4;
+        }
+        default_type application/octet-stream;
+        add_header Cache-Control "public, max-age=3600";
+    }
     
     # SaaS Web（默认路径）
     location / {