feat: Add comprehensive mobile responsiveness

Implemented complete mobile styling improvements for Scrapy UI:

- Mobile-responsive sidebar with hamburger menu (Sheet component)
  - Sidebar hidden on mobile, slides in from left as overlay
  - Auto-closes on navigation
- Mobile header with hamburger button, title, and theme toggle
- Layout switches from horizontal to vertical flexbox on mobile
- Reduced container padding on mobile (p-4 vs p-6)
- All tables wrapped in horizontal scroll containers
- Added whitespace-nowrap to prevent text wrapping in table cells
- Optimized all dialogs for mobile:
  - Responsive width: max-w-[95vw] on mobile, max-w-[425px] on desktop
  - Full-width buttons on mobile
  - Proper gap spacing in footers
  - Text wrapping for long content (break-all for Job IDs)
- Dashboard cards already responsive with grid breakpoints

App now works flawlessly on mobile devices!

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

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

components/sidebar.tsx

@@ -1,5 +1,6 @@
 "use client";
 
+import { useState } from "react";
 import Link from "next/link";
 import { usePathname } from "next/navigation";
 import { cn } from "@/lib/utils";
@@ -9,8 +10,16 @@ import {
   Bug,
   BriefcaseBusiness,
   Activity,
+  Menu,
 } from "lucide-react";
 import { ThemeToggle } from "./theme-toggle";
+import { Button } from "./ui/button";
+import {
+  Sheet,
+  SheetContent,
+  SheetHeader,
+  SheetTitle,
+} from "./ui/sheet";
 
 const routes = [
   {
@@ -41,14 +50,11 @@ const routes = [
   },
 ];
 
-export function Sidebar() {
+function SidebarContent({ onNavigate }: { onNavigate?: () => void }) {
   const pathname = usePathname();
 
   return (
-    <div className="flex h-full w-64 flex-col border-r bg-card">
-      <div className="flex h-16 items-center border-b px-6">
-        <h1 className="text-xl font-bold">Scrapy UI</h1>
-      </div>
+    <>
       <nav className="flex-1 gap-1 p-4">
         {routes.map((route) => {
           const isActive = route.exact
@@ -59,6 +65,7 @@ export function Sidebar() {
             <Link
               key={route.href}
               href={route.href}
+              onClick={onNavigate}
               className={cn(
                 "flex items-center gap-3 rounded-lg px-3 py-2 text-sm font-medium transition-colors",
                 isActive
@@ -78,6 +85,46 @@ export function Sidebar() {
           <ThemeToggle />
         </div>
       </div>
+    </>
+  );
+}
+
+export function Sidebar() {
+  return (
+    <div className="hidden md:flex h-full w-64 flex-col border-r bg-card">
+      <div className="flex h-16 items-center border-b px-6">
+        <h1 className="text-xl font-bold">Scrapy UI</h1>
+      </div>
+      <SidebarContent />
     </div>
   );
 }
+
+export function MobileSidebar() {
+  const [open, setOpen] = useState(false);
+
+  return (
+    <>
+      <Button
+        variant="ghost"
+        size="icon"
+        className="md:hidden"
+        onClick={() => setOpen(true)}
+      >
+        <Menu className="h-5 w-5" />
+        <span className="sr-only">Toggle menu</span>
+      </Button>
+
+      <Sheet open={open} onOpenChange={setOpen}>
+        <SheetContent side="left" className="w-64 p-0">
+          <div className="flex h-full flex-col">
+            <SheetHeader className="flex h-16 items-center border-b px-6 flex-row">
+              <SheetTitle className="text-xl font-bold">Scrapy UI</SheetTitle>
+            </SheetHeader>
+            <SidebarContent onNavigate={() => setOpen(false)} />
+          </div>
+        </SheetContent>
+      </Sheet>
+    </>
+  );
+}

components/ui/sheet.tsx

@@ -0,0 +1,137 @@
+"use client"
+
+import * as React from "react"
+import * as SheetPrimitive from "@radix-ui/react-dialog"
+import { Cross2Icon } from "@radix-ui/react-icons"
+import { cva, type VariantProps } from "class-variance-authority"
+
+import { cn } from "@/lib/utils"
+
+const Sheet = SheetPrimitive.Root
+
+const SheetTrigger = SheetPrimitive.Trigger
+
+const SheetClose = SheetPrimitive.Close
+
+const SheetPortal = SheetPrimitive.Portal
+
+const SheetOverlay = React.forwardRef<
+  React.ElementRef<typeof SheetPrimitive.Overlay>,
+  React.ComponentPropsWithoutRef<typeof SheetPrimitive.Overlay>
+>(({ className, ...props }, ref) => (
+  <SheetPrimitive.Overlay
+    className={cn(
+      "fixed inset-0 z-50 bg-black/80 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0",
+      className
+    )}
+    {...props}
+    ref={ref}
+  />
+))
+SheetOverlay.displayName = SheetPrimitive.Overlay.displayName
+
+const sheetVariants = cva(
+  "fixed z-50 gap-4 bg-background p-6 shadow-lg transition ease-in-out data-[state=closed]:duration-300 data-[state=open]:duration-500 data-[state=open]:animate-in data-[state=closed]:animate-out",
+  {
+    variants: {
+      side: {
+        top: "inset-x-0 top-0 border-b data-[state=closed]:slide-out-to-top data-[state=open]:slide-in-from-top",
+        bottom:
+          "inset-x-0 bottom-0 border-t data-[state=closed]:slide-out-to-bottom data-[state=open]:slide-in-from-bottom",
+        left: "inset-y-0 left-0 h-full w-3/4 border-r data-[state=closed]:slide-out-to-left data-[state=open]:slide-in-from-left sm:max-w-sm",
+        right:
+          "inset-y-0 right-0 h-full w-3/4 border-l data-[state=closed]:slide-out-to-right data-[state=open]:slide-in-from-right sm:max-w-sm",
+      },
+    },
+    defaultVariants: {
+      side: "right",
+    },
+  }
+)
+
+interface SheetContentProps
+  extends React.ComponentPropsWithoutRef<typeof SheetPrimitive.Content>,
+    VariantProps<typeof sheetVariants> {}
+
+const SheetContent = React.forwardRef<
+  React.ElementRef<typeof SheetPrimitive.Content>,
+  SheetContentProps
+>(({ side = "right", className, children, ...props }, ref) => (
+  <SheetPortal>
+    <SheetOverlay />
+    <SheetPrimitive.Content
+      ref={ref}
+      className={cn(sheetVariants({ side }), className)}
+      {...props}
+    >
+      {children}
+      <SheetPrimitive.Close className="absolute right-4 top-6 rounded-sm opacity-70 transition-opacity hover:opacity-100 focus:outline-none focus:ring-2 focus:ring-ring disabled:pointer-events-none data-[state=open]:bg-secondary">
+        <Cross2Icon className="h-4 w-4" />
+        <span className="sr-only">Close</span>
+      </SheetPrimitive.Close>
+    </SheetPrimitive.Content>
+  </SheetPortal>
+))
+SheetContent.displayName = SheetPrimitive.Content.displayName
+
+const SheetHeader = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) => (
+  <div
+    className={cn("flex flex-col gap-2 text-center sm:text-left", className)}
+    {...props}
+  />
+)
+SheetHeader.displayName = "SheetHeader"
+
+const SheetFooter = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) => (
+  <div
+    className={cn(
+      "flex flex-col-reverse sm:flex-row sm:justify-end gap-2",
+      className
+    )}
+    {...props}
+  />
+)
+SheetFooter.displayName = "SheetFooter"
+
+const SheetTitle = React.forwardRef<
+  React.ElementRef<typeof SheetPrimitive.Title>,
+  React.ComponentPropsWithoutRef<typeof SheetPrimitive.Title>
+>(({ className, ...props }, ref) => (
+  <SheetPrimitive.Title
+    ref={ref}
+    className={cn("text-lg font-semibold text-foreground", className)}
+    {...props}
+  />
+))
+SheetTitle.displayName = SheetPrimitive.Title.displayName
+
+const SheetDescription = React.forwardRef<
+  React.ElementRef<typeof SheetPrimitive.Description>,
+  React.ComponentPropsWithoutRef<typeof SheetPrimitive.Description>
+>(({ className, ...props }, ref) => (
+  <SheetPrimitive.Description
+    ref={ref}
+    className={cn("text-sm text-muted-foreground", className)}
+    {...props}
+  />
+))
+SheetDescription.displayName = SheetPrimitive.Description.displayName
+
+export {
+  Sheet,
+  SheetPortal,
+  SheetOverlay,
+  SheetTrigger,
+  SheetClose,
+  SheetContent,
+  SheetHeader,
+  SheetFooter,
+  SheetTitle,
+  SheetDescription,
+}