Fix scroll on embedded widget and adjust height to screen size

[taiebot]

🖼️ Screenshots

Fix #2596 another solution to #2744

This has been tested on multiple scenarios.
With ClaudeAI i have done multiple tests cases and this is the solution i came up with.

The table widget embedded in Nextcloud Text/Collectives had several visual bugs when scrolling and missed the three dots to manage the widget. After this PR the widget renders properly.

Interactive cells (star ratings, URLs, richtext editors) scrolled over the sticky header (title + search bar) instead of passing underneath it
The widget had a fixed height of 50vh with no adaptation to screen size
On iOS/iPad, the widget scroll captured the entire page scroll

🏚️ On main	🏡 With PR

🏁 Checklist

• ⛑️ Tests (unit and/or integration) are included or not needed
• 🔙 Backport requests are created or not needed: /backport to stableX.X
• 📅 Milestone is set
• 🌸 PR title is meaningful (if it should be in the changelog: is it meaningful to users?)

🤖 AI (if applicable)

• The content of this PR was partly or fully generated using AI

What is still broken on embedded table and not part of this pr

• column ordering do not respect table
• sort is not even plugged in

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