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## Summary by CodeRabbit
- **New Features**
- Rename dialog now edits per-item explorer icons (emoji or custom) and
can skip name-change callbacks. Doc icon picker added to the editor with
localized "Add icon" placeholder and readonly rendering. Icon editor
supports fallbacks, trigger variants, and improved input/test-id wiring.
- **Style**
- Updated icon picker and trigger sizing and placeholder visuals;
title/icon layout adjustments.
- **Chores**
- Explorer icon storage and module added to persist and serve icons
across the app.
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