Previously, the tab content wrapper used 'key={tab}' which caused React to
unmount and remount the entire subtree when switching tabs. This destroyed
all component state, including unsaved form data and pending auto-saves.
Changes:
- Removed 'key={tab}' from the wrapper div
- All tab panels now render at page initialization
- Inactive tabs use CSS 'display: none' to hide without unmounting
- Tabs remain mounted throughout the page lifetime
- Users can now switch tabs without losing form input
Updated ConfigPage.test.tsx to reflect that inactive tabs remain in the DOM
(just hidden with CSS) rather than being removed entirely.
Documentation: Added 'Tab Panels' section to Web-Development.md
explaining the rule and rationale.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Vite runs inside the frontend container where 'localhost' resolves to
the container itself, not the backend. Change the /api proxy target
from http://localhost:8000 to http://backend:8000 so the request is
routed to the backend service over the compose network.
