feat: single select equipment category and updated fitting room header

- Refactored `Equipments` page to use single category selection.
- Updated `FittingRoom` page to use `PageHeader` component.
- Added `backButton` prop to `PageHeader` component to support navigation controls.
- Removed "Manage looks for" hint text from Fitting Room header.

src/ui/components/PageHeader.tsx

@@ -6,6 +6,7 @@ interface PageHeaderProps {
   title: ReactNode
   subtitle?: ReactNode
   actions?: ReactNode
+  backButton?: ReactNode
   children?: ReactNode
   className?: string
   sticky?: boolean
@@ -16,6 +17,7 @@ export function PageHeader({
   title,
   subtitle,
   actions,
+  backButton,
   children,
   className,
   sticky = true,
@@ -32,18 +34,21 @@ export function PageHeader({
       style={sticky ? { top: topOffset } : undefined}
     >
       <div className="flex justify-between items-end animate-fade-in-down">
-        <div>
-          {subtitle && (
-            <div className="flex items-center gap-2 text-cyan-600 mb-2 tracking-[0.3em] text-xs font-mono uppercase">
-              <Hexagon size={12} className="animate-spin-slow" />
-              {subtitle}
-            </div>
-          )}
-          <h1 className="text-3xl md:text-5xl font-display font-black uppercase text-slate-900 tracking-tighter">
-            <span className="text-transparent bg-clip-text bg-gradient-to-r from-cyan-600 to-blue-600">
-              {title}
-            </span>
-          </h1>
+        <div className="flex items-center gap-4">
+          {backButton}
+          <div>
+            {subtitle && (
+              <div className="flex items-center gap-2 text-cyan-600 mb-2 tracking-[0.3em] text-xs font-mono uppercase">
+                <Hexagon size={12} className="animate-spin-slow" />
+                {subtitle}
+              </div>
+            )}
+            <h1 className="text-3xl md:text-5xl font-display font-black uppercase text-slate-900 tracking-tighter">
+              <span className="text-transparent bg-clip-text bg-gradient-to-r from-cyan-600 to-blue-600">
+                {title}
+              </span>
+            </h1>
+          </div>
         </div>
         {actions && <div className="flex items-center gap-4">{actions}</div>}
       </div>

src/ui/pages/Equipments.tsx

@@ -36,7 +36,7 @@ export default function Equipments() {
   const [items, setItems] = useState<EquipmentItem[]>([])
   const [outfits, setOutfits] = useState<OutfitItem[]>([])
   const [loading, setLoading] = useState(true)
-  const [selectedCategories, setSelectedCategories] = useState<string[]>([])
+  const [selectedCategory, setSelectedCategory] = useState<string | null>(null)
   const [extractorOpen, setExtractorOpen] = useState(false)
   const [createOutfitOpen, setCreateOutfitOpen] = useState(false)
   const [viewMode, setViewMode] = useState<'equipments' | 'outfits'>('equipments')
@@ -49,7 +49,7 @@ export default function Equipments() {
     } else {
       fetchOutfits()
     }
-  }, [viewMode, selectedCategories])
+  }, [viewMode, selectedCategory])
 
   const fetchItems = async () => {
     setLoading(true)
@@ -58,8 +58,8 @@ export default function Equipments() {
         limit: '100',
       }
 
-      if (selectedCategories.length > 0) {
-        query.category = selectedCategories
+      if (selectedCategory) {
+        query.category = [selectedCategory]
       }
 
       const res = await client.equipments.$get({
@@ -106,9 +106,7 @@ export default function Equipments() {
   }
 
   const toggleCategory = (category: string) => {
-    setSelectedCategories((prev) =>
-      prev.includes(category) ? prev.filter((c) => c !== category) : [...prev, category],
-    )
+    setSelectedCategory((prev) => (prev === category ? null : category))
   }
 
   return (
@@ -157,7 +155,7 @@ export default function Equipments() {
           <ScrollArea className="w-full whitespace-nowrap">
             <div className="flex w-max space-x-2 p-1">
               {EQUIPMENT_CATEGORIES.map((cat) => {
-                const isSelected = selectedCategories.includes(cat.main_category)
+                const isSelected = selectedCategory === cat.main_category
                 return (
                   <Badge
                     key={cat.main_category}

src/ui/pages/FittingRoom.tsx

@@ -5,6 +5,7 @@ import { useNavigate, useParams } from 'react-router-dom'
 import { client } from '../client'
 import { CreateLookDialog } from '../components/CreateLookDialog'
 import { LookDetailsDialog } from '../components/LookDetailsDialog'
+import { PageHeader } from '../components/PageHeader'
 import { Button } from '../components/ui/button'
 import { Card } from '../components/ui/card'
 
@@ -73,36 +74,29 @@ export default function FittingRoom() {
 
   return (
     <div className="p-8 animate-fade-in-up h-screen flex flex-col overflow-hidden bg-stone-50/30">
-      {/* Header */}
-      <div className="flex justify-between items-center mb-6 shrink-0">
-        <div className="flex items-center gap-4">
+      <PageHeader
+        title="Fitting Room"
+        subtitle="System // FITTING_ROOM/"
+        backButton={
           <Button
             variant="ghost"
             size="icon"
             onClick={() => navigate('/characters')}
-            className="rounded-full hover:bg-stone-200"
+            className="rounded-full hover:bg-stone-200 text-stone-600"
           >
-            <ArrowLeft className="w-5 h-5 text-stone-600" />
+            <ArrowLeft className="w-5 h-5" />
           </Button>
-          <div>
-            <h1 className="text-3xl font-black text-stone-800 uppercase tracking-tighter">
-              Fitting Room
-            </h1>
-            <p className="text-stone-500 text-sm font-medium flex items-center gap-2">
-              Manage looks for{' '}
-              <span className="text-stone-900 font-bold bg-stone-200 px-2 py-0.5 rounded text-xs uppercase">
-                {character.name}
-              </span>
-            </p>
-          </div>
-        </div>
-        <Button
-          onClick={() => setCreateLookOpen(true)}
-          className="bg-stone-900 hover:bg-stone-800 text-white shadow-lg hover:shadow-xl transition-all"
-        >
-          <Plus className="mr-2 h-4 w-4" /> Create New Look
-        </Button>
-      </div>
+        }
+        actions={
+          <Button
+            onClick={() => setCreateLookOpen(true)}
+            className="bg-stone-900 hover:bg-stone-800 text-white shadow-lg hover:shadow-xl transition-all"
+          >
+            <Plus className="mr-2 h-4 w-4" /> Create New Look
+          </Button>
+        }
+        className="mb-6 shrink-0"
+      />
 
       <div className="flex flex-col lg:flex-row flex-1 gap-6 overflow-hidden pb-4">
         {/* Left: Character Preview */}