## Summary
- use active agent branding for the uninstall completion header
- end NemoHermes uninstall with “Hermes has left the tidepool.”
- keep the default NemoClaw goodbye unchanged

## Tests
- npm ci --ignore-scripts
- npx vitest run src/lib/actions/uninstall/run-plan.test.ts
- npm run build:cli
- npm run typecheck:cli
- npm run source-shape:check
- npm run format:check -- src/lib/actions/uninstall/run-plan.ts
src/lib/actions/uninstall/run-plan.test.ts
- git diff --check

Signed-off-by: Aaron Erickson <aerickson@nvidia.com>

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Uninstaller now uses agent-specific branding and farewell messages
(e.g., Hermes) instead of static product text.

* **Refactor**
* Command help, usage and flag descriptions now derive from CLI branding
constants for consistent messaging.

* **Tests**
* Added/updated tests to verify agent-specific uninstall output and
ensure absence of incorrect branding.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

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Signed-off-by: Aaron Erickson <aerickson@nvidia.com>