fix(ui): center image params popover and remove 4k sparkles icon

components/image-params-bar.tsx

@@ -254,12 +254,11 @@ export function ImageParamsBar({
               <span className="mx-1.5 h-3 w-px bg-[#cfd5de]" />
               <span className="inline-flex min-w-0 items-center gap-0.5 truncate">
                 {sizeLabel}
-                {params.imageSize === "4K" ? <Sparkles className="h-3 w-3 text-[#0ea5e9]" /> : null}
               </span>
             </Button>
           </PopoverTrigger>
           <PopoverContent
-            align="start"
+            align="center"
             side="top"
             sideOffset={10}
             className="w-[312px] max-w-[calc(100vw-24px)] rounded-[14px] border border-[#d8dde4] bg-[#f3f4f6]/90 p-2 shadow-[0_10px_24px_rgba(15,23,42,0.14)]"
@@ -308,7 +307,6 @@ export function ImageParamsBar({
                     >
                       <span className="inline-flex items-center gap-1">
                         {option.value === "4K" ? "超清 4K" : `高清 ${option.label}`}
-                        {option.value === "4K" ? <Sparkles className="h-3 w-3 text-[#0ea5e9]" /> : null}
                       </span>
                     </button>
                   ))}