feat: polish invoice editor and viewer UI with custom NumberInput

component

- Create custom NumberInput component with increment/decrement buttons
- Add 0.25 step increments for hours and rates in invoice forms
- Implement emerald-themed styling with hover states and accessibility
- Add keyboard navigation (arrow keys) and proper ARIA support
- Condense invoice editor tax/totals section into efficient grid layout
- Update client dropdown to single-line format (name + email)
- Add fixed footer with floating action bar pattern matching business
  forms
- Redesign invoice viewer with better space utilization and visual
  hierarchy
- Maintain professional appearance and consistent design system
- Fix Next.js 15 params Promise handling across all invoice pages
- Resolve TypeScript compilation errors and type-only imports

src/components/ui/card.tsx

@@ -1,18 +1,18 @@
-import * as React from "react"
+import * as React from "react";
 
-import { cn } from "~/lib/utils"
+import { cn } from "~/lib/utils";
 
 function Card({ className, ...props }: React.ComponentProps<"div">) {
   return (
     <div
       data-slot="card"
       className={cn(
-        "bg-card text-card-foreground flex flex-col gap-6 rounded-xl border py-6 shadow-sm",
-        className
+        "bg-background/60 text-card-foreground border-border/40 flex flex-col gap-6 rounded-2xl border py-6 shadow-lg backdrop-blur-xl backdrop-saturate-150",
+        className,
       )}
       {...props}
     />
-  )
+  );
 }
 
 function CardHeader({ className, ...props }: React.ComponentProps<"div">) {
@@ -21,21 +21,21 @@ function CardHeader({ className, ...props }: React.ComponentProps<"div">) {
       data-slot="card-header"
       className={cn(
         "@container/card-header grid auto-rows-min grid-rows-[auto_auto] items-start gap-1.5 px-6 has-data-[slot=card-action]:grid-cols-[1fr_auto] [.border-b]:pb-6",
-        className
+        className,
       )}
       {...props}
     />
-  )
+  );
 }
 
 function CardTitle({ className, ...props }: React.ComponentProps<"div">) {
   return (
     <div
       data-slot="card-title"
-      className={cn("leading-none font-semibold", className)}
+      className={cn("text-lg leading-none font-semibold", className)}
       {...props}
     />
-  )
+  );
 }
 
 function CardDescription({ className, ...props }: React.ComponentProps<"div">) {
@@ -45,7 +45,7 @@ function CardDescription({ className, ...props }: React.ComponentProps<"div">) {
       className={cn("text-muted-foreground text-sm", className)}
       {...props}
     />
-  )
+  );
 }
 
 function CardAction({ className, ...props }: React.ComponentProps<"div">) {
@@ -54,11 +54,11 @@ function CardAction({ className, ...props }: React.ComponentProps<"div">) {
       data-slot="card-action"
       className={cn(
         "col-start-2 row-span-2 row-start-1 self-start justify-self-end",
-        className
+        className,
       )}
       {...props}
     />
-  )
+  );
 }
 
 function CardContent({ className, ...props }: React.ComponentProps<"div">) {
@@ -68,7 +68,7 @@ function CardContent({ className, ...props }: React.ComponentProps<"div">) {
       className={cn("px-6", className)}
       {...props}
     />
-  )
+  );
 }
 
 function CardFooter({ className, ...props }: React.ComponentProps<"div">) {
@@ -78,7 +78,7 @@ function CardFooter({ className, ...props }: React.ComponentProps<"div">) {
       className={cn("flex items-center px-6 [.border-t]:pt-6", className)}
       {...props}
     />
-  )
+  );
 }
 
 export {
@@ -89,4 +89,4 @@ export {
   CardAction,
   CardDescription,
   CardContent,
-}
+};