feat(frontend): Complete shadcn/ui migration with dark mode support and analytics updates.

- Convert all analytics components to use shadcn Card and semantic colors
- Update RawTransactionModal with proper shadcn styling and theme support
- Fix all remaining hardcoded colors to use CSS variables (bg-card, text-foreground, etc.)
- Ensure consistent theming across light/dark modes for all components
- Add custom tooltips with semantic colors for chart components

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

frontend/src/components/ui/input.tsx

@@ -1,6 +1,6 @@
-import * as React from "react"
+import * as React from "react";
 
-import { cn } from "@/lib/utils"
+import { cn } from "@/lib/utils";
 
 const Input = React.forwardRef<HTMLInputElement, React.ComponentProps<"input">>(
   ({ className, type, ...props }, ref) => {
@@ -9,14 +9,14 @@ const Input = React.forwardRef<HTMLInputElement, React.ComponentProps<"input">>(
         type={type}
         className={cn(
           "flex h-9 w-full rounded-md border border-input bg-transparent px-3 py-1 text-base shadow-sm transition-colors file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring disabled:cursor-not-allowed disabled:opacity-50 md:text-sm",
-          className
+          className,
         )}
         ref={ref}
         {...props}
       />
-    )
-  }
-)
-Input.displayName = "Input"
+    );
+  },
+);
+Input.displayName = "Input";
 
-export { Input }
+export { Input };