- Added a server-snapshot fallback (`() => false`) to `useIsMobile` to ensure
consistent results between server-side rendering and the browser, preventing
hydration mismatches.
- Removed a redundant ternary in `PageLayout` sidebar styles, replacing
`isMobile ? 'fixed' : 'fixed'` with a single `'fixed'` value for clarity.
These changes improve SSR reliability and tidy up inline styles without
affecting runtime functionality.
BREAKING CHANGE:
helpers/utils.js no longer exports `isMobile()`.
Any external code that relied on this function must switch to the `useIsMobile` React hook.
Summary
-------
1. Deleted the obsolete `isMobile()` function from helpers/utils.js.
2. Introduced `MOBILE_BREAKPOINT` constant and `matchMedia`-based detection for non-React contexts.
3. Reworked toast positioning logic in utils.js to rely on `matchMedia`.
4. Updated render.js:
• Removed isMobile import.
• Added MOBILE_BREAKPOINT detection in `truncateText`.
5. Migrated every page/component to the `useIsMobile` hook:
• Layout: HeaderBar, PageLayout, SiderBar
• Pages: Home, Detail, Playground, User (Add/Edit), Token, Channel, Redemption, Ratio Sync
• Components: ChannelsTable, ChannelSelectorModal, ConflictConfirmModal
6. Purged all remaining `isMobile()` calls and legacy imports.
7. Added missing `const isMobile = useIsMobile()` declarations where required.
Benefits
--------
• Unifies mobile detection with a React-friendly hook.
• Eliminates duplicated logic and improves maintainability.
• Keeps non-React helpers lightweight by using `matchMedia` directly.
