webui: add OAI-Compat Harmony tool-call streaming visualization and persistence in...

webui: add OAI-Compat Harmony tool-call streaming visualization and persistence in chat UI (#16618)

* webui: add OAI-Compat Harmony tool-call live streaming visualization and persistence in chat UI

- Purely visual and diagnostic change, no effect on model context, prompt
  construction, or inference behavior

- Captured assistant tool call payloads during streaming and non-streaming
  completions, and persisted them in chat state and storage for downstream use

- Exposed parsed tool call labels beneath the assistant's model info line
  with graceful fallback when parsing fails

- Added tool call badges beneath assistant responses that expose JSON tooltips
  and copy their payloads when clicked, matching the existing model badge styling

- Added a user-facing setting to toggle tool call visibility to the Developer
  settings section directly under the model selector option

* webui: remove scroll listener causing unnecessary layout updates (model selector)

* Update tools/server/webui/src/lib/components/app/chat/ChatMessages/ChatMessageAssistant.svelte

Co-authored-by: Aleksander Grygier <redacted>
* Update tools/server/webui/src/lib/components/app/chat/ChatMessages/ChatMessageAssistant.svelte

Co-authored-by: Aleksander Grygier <redacted>
* chore: npm run format & update webui build output

* chore: update webui build output

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Co-authored-by: Aleksander Grygier <redacted>