[deploy] Update app.py

[deploy] Update app.py

[deploy] Update app.py

[deploy] Update app.py

[deploy] Update app.py

[deploy] Update app.py

[deploy] Update app.py

[deploy] Update app.py

[deploy] Update app.py

fix: remove all gr.Tabs() from inputs (Gradio4 hidden tab error)

fix: remove preview Tabs, outputs 7->5 (Gradio4 Too many arguments fix)

fix: remove as preview_tabs (Gradio4 tab selection error fix)

feat: Universal Worksheet (student+teacher), content_type auto-detect, 3-tab preview UI

fix: !important CSS dark mode, mermaid pre fallback, html/body explicit colors

feat: response_schema JSON mode (token saving) + dark mode fix + mermaid async error handler

fix: color-scheme:light (dark mode), mermaid async try-catch fallback

feat: SRT+Text tab UI, remove YouTube (HF DNS blocked), add YouTube caption guide

fix: robust transcript fallback - list(tl), dict+obj compat, TranscriptsDisabled catch

fix: youtube-transcript-api instead of yt-dlp (HF Spaces network restriction)

fix: api_name=False on run_btn.click to bypass gr.File bool schema TypeError

revert: gradio 4.44.0 + huggingface_hub 0.22.2 (stable combo)

fix: remove progress=gr.Progress() default to fix Gradio5 /gradio_api/info 500

fix: Gradio 5 gr.File compat (srt_file str vs .name)

Update app.py: global platforms + Python 3.11

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