fix(geoportal): search input text invisible in dark mode

Changed bg-background/95 to bg-background (opaque) and added
text-foreground to ensure input text is visible on dark theme.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/modules/geoportal/components/search-bar.tsx

@@ -106,7 +106,7 @@ export function SearchBar({ onResultSelect, className }: SearchBarProps) {
             if (results.length > 0) setOpen(true);
           }}
           onKeyDown={handleKeyDown}
-          className="pl-8 pr-8 h-8 text-sm bg-background/95 backdrop-blur-sm"
+          className="pl-8 pr-8 h-8 text-sm bg-background backdrop-blur-sm text-foreground"
         />
         {loading && (
           <Loader2 className="absolute right-8 top-1/2 -translate-y-1/2 h-3.5 w-3.5 animate-spin text-muted-foreground" />