Feature request: configurable companion (bubble duration & language)

Feature request

The companion feature (the small animated character beside the input box) is a lovely touch, but currently its behavior is not configurable.

Requested settings

1. Bubble display duration — The speech bubble disappears too quickly to read, especially for non-native English speakers. A setting like companion.bubbleDuration ("short" | "medium" | "long" | "persistent") would help.

2. Companion language — The companion always speaks English, even when the user's language is configured to something else (via CLAUDE.md or system settings). A companion.language setting — or simply respecting the existing language configuration — would be great.

Suggested config

In ~/.claude/settings.json:

{
  "companion": {
    "bubbleDuration": "long",
    "language": "fr"
  }
}

Context

As a French-speaking user, the companion's bubbles disappear before I can finish reading them, and switching mental context to English for a brief quip breaks the flow. Both issues would be solved by these two small settings.

Thanks for the great work on Claude Code!