* Update files
* Git panel: share checkout actions
Hoist checkout-scoped async git actions into a shared store and keep primary Push CTA loading in-place. Also stabilize e2e git flows.
* Stabilize git panel async actions and fix e2e flakes
- Add download toast component with progress indicator and auto-dismiss
- Add download store for managing file download state
- Add e2e tests for permission prompts (allow/deny flows)
- Add global setup for e2e tests with isolated daemon instance
- Update favicon assets with new design
- Refactor agent-stream-view to use shared tool-call-details component
- Simplify file-explorer-pane component
- Clean up unused screenshots and PRODUCTION.md
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