[Backport] Fix thumbnail dashboard card

[joaoantoniocardoso]

Summary

• Backport of Fix thumbnail dashboard card #3849 into 1.4
• Stop click propagation on VideoThumbnail controls so buttons don't trigger parent navigation
• Constrain thumbnail frame height and use object-fit: contain so the full image fits within its parent

Test plan

• Verify camera thumbnail play/camera buttons work without navigating away
• Verify thumbnail image is fully contained within its parent card

Summary by Sourcery

Backport video thumbnail interaction and layout improvements to the 1.4 branch.

Bug Fixes:

• Prevent video thumbnail control clicks from triggering parent navigation actions.

Enhancements:

• Ensure video thumbnails are fully visible within their container by constraining frame height and using contained object-fit behavior.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Backports video thumbnail interaction and layout improvements to 1.4 by preventing thumbnail control clicks from bubbling to parent navigation and adjusting thumbnail image sizing to fully fit within its card.

Sequence diagram for updated video thumbnail click handling

sequenceDiagram
  actor User
  participant ParentCard as ParentCardRouterLink
  participant VideoThumbnail
  participant ThumbnailControls
  participant Router

  User->>ParentCard: click on card area
  ParentCard->>Router: navigate to video detail

  User->>ThumbnailControls: click play or camera button
  ThumbnailControls->>ThumbnailControls: @click.stop.prevent
  ThumbnailControls-->>VideoThumbnail: emit play_or_camera_event
  VideoThumbnail-->>Router: no navigation triggered
  VideoThumbnail-->>User: video or camera action executed without leaving page

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File-Level Changes

Change	Details	Files
Adjust thumbnail image styling so the entire image fits within its parent card.	Change image CSS inline style from object-fit: cover to object-fit: contain while keeping full width and height. Constrain the thumbnail frame with max-height: 100% to prevent the image area from exceeding its container.	core/frontend/src/components/video-manager/VideoThumbnail.vue
Prevent clicks on video thumbnail controls from triggering parent navigation handlers.	Add @click.stop.prevent to the thumbnail controls container to stop event propagation and prevent default navigation when interacting with control buttons.	core/frontend/src/components/video-manager/VideoThumbnail.vue

Possibly linked issues

• #(not specified): PR prevents play/control clicks from navigating away, matching issue’s request to keep interaction in dashboard.

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[sourcery-ai]

Hey - I've left some high level feedback:

• Consider moving the inline style="width: 100%; height: 100%; object-fit: contain;" on the <img> into a CSS class so that thumbnail layout behavior is centralized and easier to maintain.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Consider moving the inline `style="width: 100%; height: 100%; object-fit: contain;"` on the `<img>` into a CSS class so that thumbnail layout behavior is centralized and easier to maintain.

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