fix(frame-studio): remove canShare gate for iOS export

canShare was returning false on some iOS devices, preventing the share
path entirely and falling through to anchor download which silently
fails on iOS Safari. Now tries navigator.share() directly and only
falls back to anchor download on TypeError.

Author: kevinkiklee

src/app/[locale]/frame-studio/_components/ExportDialog.tsx

@@ -197,16 +197,28 @@ export function ExportDialog({
       const fileName = `${baseName}_edited${ext}`
       const file = new File([blob], fileName, { type: originalMimeType })
 
-      // iOS Safari doesn't support anchor downloads — use native share sheet
-      if (navigator.share && navigator.canShare?.({ files: [file] })) {
-        try { await navigator.share({ files: [file] }) } catch { /* user cancelled */ }
-      } else {
+      // Try Web Share API first (iOS Safari doesn't support anchor downloads)
+      let shared = false
+      if (typeof navigator.share === 'function') {
+        try {
+          await navigator.share({ files: [file] })
+          shared = true
+        } catch (e) {
+          // AbortError = user cancelled share sheet (still counts as handled)
+          if (e instanceof DOMException && e.name === 'AbortError') shared = true
+          // TypeError = files not supported → fall through to anchor download
+        }
+      }
+
+      if (!shared) {
         const url = URL.createObjectURL(blob)
         const a = document.createElement('a')
         a.href = url
         a.download = fileName
+        document.body.appendChild(a)
         a.click()
-        setTimeout(() => URL.revokeObjectURL(url), 10000)
+        document.body.removeChild(a)
+        setTimeout(() => URL.revokeObjectURL(url), 30000)
       }
       onClose()
     } finally {