PR description:
## Summary
- Clicking Feedback → Issue → Contact support was navigating to
`/support/new` (the old full-page form) instead of opening the
integrated sidebar support form
- Fixed by setting a `helpPanelState.requestedView` signal before
opening the Help sidebar, so it opens directly at the support form view
- Added a small valtio store (`state/help-panel-state.ts`) to
communicate the desired view between `FeedbackDropdown` and `HelpPanel`
## Test plan
- [ ] Feedback → Issue → Contact support opens the Help sidebar at the
support form (not `/support/new`)
- [ ] Help button → Contact support still works as before
- [ ] Closing and reopening the Help sidebar via the Help button opens
at the home view
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Selecting **Support** from the Help menu now opens the Help Panel
directly to the Support view.
* The Help Panel automatically updates to the requested section when
opened.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->