feat(Grok): update presence for current grok.com

[caffeinepx]

Description

The Grok presence was last updated a long time ago and no longer matches grok.com. Chat URLs moved from /chat/{uuid} to /c/{id}, the old talking-state class and REST flow were stale, and the logo was outdated.

This rewrite updates the activity against the current grok.com app:

• Shows Playing Grok with the current official Grok mark (transparent corners)
• Show chat title setting (on/off)
• Show last prompt setting, rendered as Replying to: "..." under the title
• Per-chat elapsed time while either setting is on; if both are off, only the overall Grok session timer is shown
• Small image for the current chat-bar mode: Fast, Auto, Expert, Heavy, Build, Voice (#model-select-trigger / /voice)
• Reads the live DOM first, then falls back to conversations_v2, response-node, and load-responses

Tested on grok.com with the PreMiD extension in Activity Developer Mode. Chat title, last prompt, timers, and mode icons all behaved as expected.

Acknowledgements

• I read the Activity Guidelines
• I linted the code by running npm run lint
• The PR title follows the repo's commit conventions

Screenshots

Proof showing the creation/modification is working as expected

• General Preview
  

• Mode Selected
  

• With "show last prompt" disabled
  

• With "show last prompt" and "chat title" disabled
  

• Settings inside presence
  

Tested live on grok.com with the PreMiD extension (developer mode). Discord showed Playing Grok, chat title, last prompt, per-chat timer, and the mode overlay from the chat bar.

[dimerp]

🖼️ Activity asset preview

Behold, the gallery! Admission is free, but I do accept tips in the form of approvals.

Grok (websites/G/Grok) — update

Preview	Source	URL
	logo	https://i.imgur.com/KygGP1w.png
	thumbnail	https://cdn.rcd.gg/PreMiD/websites/G/Grok/assets/thumbnail.png
	code (assets.ts)	https://i.imgur.com/uJSu7il.png
	code (assets.ts)	https://i.imgur.com/S5ACb1x.png
	code (assets.ts)	https://i.imgur.com/FiP0gX4.png
	code (assets.ts)	https://i.imgur.com/5miQ3Fc.png
	code (assets.ts)	https://i.imgur.com/IxrTU1f.png
	code (assets.ts)	https://i.imgur.com/OvDt2f1.png

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_{Beep boop — I refresh this comment on every push, so no need to scroll. 🤖}

[theusaf]

Use Imgur URL instead

[caffeinepx]

Switched the logo and mode icons over to Imgur URLs and dropped the base64 embeds.

• Logo: https://i.imgur.com/KygGP1w.png
• Fast: https://i.imgur.com/uJSu7il.png
• Auto: https://i.imgur.com/S5ACb1x.png
• Expert: https://i.imgur.com/FiP0gX4.png
• Heavy: https://i.imgur.com/5miQ3Fc.png
• Build: https://i.imgur.com/IxrTU1f.png
• Voice: https://i.imgur.com/OvDt2f1.png