Upgrade to Gradio 6.0.1 and fix FOUC

- Match Qwen-Image Gradio version (6.0.1)
- Show white screen initially, reveal dark UI after 100ms

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -4,7 +4,7 @@ emoji: 🖼
 colorFrom: purple
 colorTo: red
 sdk: gradio
-sdk_version: 5.49.1
+sdk_version: 6.0.1
 app_file: app_diffusers.py
 pinned: false
 license: apache-2.0

app_diffusers.py

@@ -580,14 +580,8 @@ with gr.Blocks(
         input_shadow_focus='0 0 0 4px rgba(0, 113, 227, 0.15)',
     ),
     css=apple_css,
-    head="""<style>
-.gradio-container .block, .gradio-container textarea, .gradio-container button, .gradio-container select, .gradio-container input, .gradio-container .input-section, .gradio-container .output-section {
-    opacity: 0 !important;
-}
-.dark .gradio-container .block, .dark .gradio-container textarea, .dark .gradio-container button, .dark .gradio-container select, .dark .gradio-container input, .dark .gradio-container .input-section, .dark .gradio-container .output-section {
-    opacity: 1 !important;
-}
-</style>""",
+    head="""<style>body{background:#fff!important;visibility:hidden}</style>
+<script>setTimeout(function(){document.body.style.visibility='visible';document.body.style.background=''},100)</script>""",
 ) as demo:
     # Two-column layout - variant='panel' prevents responsive stacking
     with gr.Row(equal_height=False, variant="panel", elem_id="main-row"):