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/badge.tsx

@@ -1,7 +1,7 @@
-import * as React from "react"
-import { cva, type VariantProps } from "class-variance-authority"
+import * as React from "react";
+import { cva, type VariantProps } from "class-variance-authority";
 
-import { cn } from "@/lib/utils"
+import { cn } from "@/lib/utils";
 
 const badgeVariants = cva(
   "inline-flex items-center rounded-md border px-2.5 py-0.5 text-xs font-semibold transition-colors focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2",
@@ -20,8 +20,8 @@ const badgeVariants = cva(
     defaultVariants: {
       variant: "default",
     },
-  }
-)
+  },
+);
 
 export interface BadgeProps
   extends React.HTMLAttributes<HTMLDivElement>,
@@ -30,7 +30,7 @@ export interface BadgeProps
 function Badge({ className, variant, ...props }: BadgeProps) {
   return (
     <div className={cn(badgeVariants({ variant }), className)} {...props} />
-  )
+  );
 }
 
-export { Badge, badgeVariants }
+export { Badge, badgeVariants };