[Bug] Light mode has inconsistent theme adaptation on Activity and Auth-related screens

[wanghuan-520]

Summary

In NyxID App 1.0.1 (28), several screens and components still display dark-styled UI blocks or low-contrast elements in Light mode, resulting in an inconsistent visual experience and reduced readability.

Affected Areas

• Activity screen
• Activity loading state
• History section header
• History cards
• Auth / social login screen
• Bottom Ask Nyx FAB area

Actual

In Light mode:

• The loading card on the Activity screen is still rendered as a dark panel
• The History date header (for example MAR 13) still uses a dark blur/background style
• History cards appear visually washed out and low-contrast
• The middle Ask Nyx FAB remains visually dark and does not feel consistent with the light bottom navigation bar
• Social login buttons on the auth screen remain dark
• Legal/helper text on the auth screen has relatively weak contrast in Light mode

Expected

When Light mode is enabled:

• Loading states should follow the Light theme
• History headers and cards should match the Light theme visual system
• The bottom navigation and FAB area should feel visually consistent in Light mode
• Social login screen components should either follow the Light theme or use an intentional style that still feels visually consistent and readable
• Secondary text should maintain sufficient contrast

Impact

• Light mode feels visually inconsistent
• Some elements look like dark-mode leftovers rather than intentional Light theme design
• Readability and overall polish are reduced, especially in loading and history-related states

Notes

Based on the current implementation, likely causes include:

• FullScreenLoading uses hardcoded dark fallback colors instead of theme-driven colors
• HistorySectionHeader uses BlurView tint="dark" and an additional dark background in Light mode
• HistoryCard applies reduced opacity, which further lowers contrast in Light mode
• The Light theme token for the Ask Nyx FAB still uses a dark background
• Social auth buttons on the auth screen use hardcoded dark colors instead of theme-aware values
• Some auth page legal text also uses hardcoded colors instead of theme tokens