git:20260325.2b35fc5 to git:20260423.ada48c2

- description: Manage assistant voice, avatar (set, remove, view, show), and system settings

- Tools for managing assistant settings: voice configuration (TTS voice, PTT activation key, conversation timeout), avatar management (set, remove, view/show current avatar), system settings navigation, and in-app settings tab navigation.

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- ## Avatar

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- When the user asks to set, change, or update your avatar to an image they provide:

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- 1. Find the uploaded image in the conversation attachments directory

- 2. Use the `set_avatar` tool with the `image_path` parameter set to the workspace-relative path (e.g. `conversations/<id>/attachments/Dropped Image.png`)

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- The tool copies the image to the canonical location (`data/avatar/avatar-image.png`) and notifies the app to refresh automatically.

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- When the user asks to remove, clear, or reset their avatar, use the `remove_avatar` tool. It deletes only the custom image and preserves the native character traits so the character avatar is restored automatically.

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- When the user asks to see, view, or show their current avatar, use the `get_avatar` tool. It returns the avatar image inline. If no custom image exists but character traits are set, it regenerates the static PNG from traits and returns that.

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- **Do NOT use `bash`, `cp`, `rm`, or `file_read` for avatar operations** — always use `set_avatar` / `remove_avatar` / `get_avatar` so the app is properly notified and character traits are preserved.