Redesign the quality slider, result actions and sharing card (0.2.1)

[KBRASK]

Redesign of the quality slider, the Studio result area and the sharing card. Reviewed on the Windows test machine (RTX 5060 Ti). Release 0.2.1.

Quality slider

• A thick track in the interface accent, with the knob inside it. Level names sit under the stops and can be clicked.
• A short pop when a level is chosen. The focus ring appears only for keyboard use.
• The heading no longer repeats the level name.

Result area

• One action bar right under the video: Download video (primary), Share, and a Report menu.
• The Report menu holds the diagnostic report and the generation record, so "View report" and "Download report" no longer appear side by side.
• Escape closes the menu without closing the Studio. The menu says when the diagnostic report is unavailable.
• Measurements sit in one card under the actions, in Create and in Creations. Times stay in seconds.

Sharing card

• Generation time, GPU and quality level on an accent footer. Memory figures and step counts are gone.
• The share dialog opens without a stray focus ring.

Checks

• Browser tests pass: report lifecycle, sharing with a real video, result memory, quality slider, prompt references, resource settings, update notice.
• Checked on the Windows test machine's ComfyUI:
  • the slider at every level;
  • the report menu: Escape, outside click, unavailable report;
  • the share dialog;
  • Creations.