feat(admin): finalizing modular refactoring with testing suite and UI polish

frontend/components/admin/CategoryManager.tsx

@@ -0,0 +1,113 @@
+import React from 'react';
+import { Layers, Plus, Edit2, Trash2, X } from 'lucide-react';
+
+interface CategoryManagerProps {
+  categories: any[];
+  onAddCategory: () => void;
+  onDeleteCategory: (id: number, name: string) => void;
+  setEditingCategory: (cat: any) => void;
+  setEditCatForm: (form: any) => void;
+  editCatForm: any;
+  editingCategory: any;
+  onUpdateCategorySubmit: () => void;
+}
+
+export default function CategoryManager({
+  categories,
+  onAddCategory,
+  onDeleteCategory,
+  setEditingCategory,
+  setEditCatForm,
+  editCatForm,
+  editingCategory,
+  onUpdateCategorySubmit
+}: CategoryManagerProps) {
+  return (
+    <section className="bg-slate-900/40 backdrop-blur-xl border border-slate-800/50 rounded-[2.5rem] p-5 md:p-8 shadow-2xl space-y-6 transition-all group/categories">
+      <div className="flex items-center justify-between px-2">
+         <div className="flex items-center gap-4">
+           <div className="w-10 h-10 rounded-xl bg-indigo-500/10 flex items-center justify-center text-indigo-400 border border-indigo-500/20">
+             <Layers size={20} />
+           </div>
+           <h2 className="text-xl font-black text-white tracking-tight">Category Groups</h2>
+         </div>
+          <button 
+            onClick={onAddCategory}
+            className="flex items-center gap-2 bg-indigo-600 hover:bg-indigo-500 text-white px-6 py-3 rounded-xl text-xs font-black transition-all shadow-xl shadow-indigo-600/10 active:scale-95 border border-indigo-500/30 tracking-tight"
+          >
+            <Plus size={14} /> New Group
+          </button>
+      </div>
+
+      <div className="grid sm:grid-cols-2 lg:grid-cols-4 gap-3">
+         {categories.map(cat => (
+           <div key={cat.id} className="p-4 bg-slate-950/40 border border-slate-800/50 rounded-2xl flex items-center justify-between group hover:border-primary/40 transition-all">
+             <div className="min-w-0 pr-4">
+               <p className="text-sm font-bold text-slate-200 group-hover:text-primary transition-colors">{cat.name}</p>
+               <p className="text-[10px] text-slate-500 font-medium mt-0.5">{cat.description || 'General storage'}</p>
+             </div>
+             <div className="flex gap-1 shrink-0">
+                <button 
+                  onClick={() => {
+                    setEditingCategory(cat);
+                    setEditCatForm({ name: cat.name, description: cat.description || '' });
+                  }}
+                  className="p-2 text-slate-600 hover:text-white hover:bg-slate-800 rounded-lg transition-all"
+                >
+                  <Edit2 size={14} />
+                </button>
+                <button 
+                  onClick={() => onDeleteCategory(cat.id, cat.name)}
+                  className="p-2 text-slate-600 hover:text-red-500 hover:bg-red-500/5 rounded-lg transition-all"
+                >
+                  <Trash2 size={14} />
+                </button>
+             </div>
+           </div>
+         ))}
+      </div>
+
+      {/* Edit Category Modal */}
+      {editingCategory && (
+        <div className="fixed inset-0 z-[100] flex items-end sm:items-center justify-center p-0 sm:p-4 bg-slate-950/90 backdrop-blur-xl animate-in fade-in duration-300">
+          <div className="w-full max-w-lg bg-slate-900 border-x border-t sm:border border-slate-800 rounded-t-[2.5rem] sm:rounded-3xl p-6 sm:p-10 shadow-2xl space-y-8 overflow-hidden animate-in slide-in-from-bottom-10">
+            <div className="flex justify-between items-center">
+               <div className="flex items-center gap-4">
+                 <div className="w-10 h-10 rounded-xl bg-indigo-500/10 flex items-center justify-center text-indigo-400 border border-indigo-500/20">
+                   <Edit2 size={20} />
+                 </div>
+                 <h3 className="text-xl font-black text-white tracking-tight">Modify Group</h3>
+               </div>
+               <button onClick={() => setEditingCategory(null)} className="p-3 hover:bg-slate-800 rounded-2xl text-slate-500 transition-colors border border-slate-800">
+                 <X size={20} />
+               </button>
+            </div>
+            <div className="space-y-6">
+               <div className="space-y-1.5">
+                  <label className="text-[10px] font-black text-slate-500 tracking-tight ml-1">Group Identifier</label>
+                  <input 
+                    type="text" 
+                    value={editCatForm.name}
+                    onChange={(e) => setEditCatForm({...editCatForm, name: e.target.value})}
+                    className="w-full bg-slate-950 border border-slate-800 rounded-2xl py-3.5 px-5 text-sm text-white focus:border-primary outline-none transition-all"
+                  />
+               </div>
+               <div className="space-y-1.5">
+                  <label className="text-[10px] font-black text-slate-500 tracking-tight ml-1">Strategic Description</label>
+                  <textarea 
+                    value={editCatForm.description}
+                    onChange={(e) => setEditCatForm({...editCatForm, description: e.target.value})}
+                    className="w-full bg-slate-950 border border-slate-800 rounded-2xl py-4 px-5 text-sm text-white focus:border-primary outline-none transition-all h-32 resize-none"
+                  />
+               </div>
+               <button onClick={onUpdateCategorySubmit} className="w-full bg-indigo-600 hover:bg-indigo-500 text-white font-black py-4 rounded-2xl shadow-xl shadow-indigo-600/20 active:scale-95 transition-all text-xs mb-4 tracking-tight">
+                 Update Asset Group
+               </button>
+            </div>
+          </div>
+        </div>
+      )}
+    </section>
+  );
+}
+