Redesign login UI, add theme toggle, refactor user update

- Redesigned login page with two-panel layout and branding
- Added HexaDistro logo and theme toggle to sidebar/header
- Refactored user update: roles via update endpoint, removed assignRole API/controller
- Extended UpdateUserRequest for username, role, password changes
- UserService.UpdateAsync syncs changes with AuthHex, with rollback
- Stock balances client dedupes by itemId-locationId
- Middleware matcher excludes static assets from auth checks
- Improved localStorage clearing for user context
- Added lucide-react for icons
- Minor UI/code cleanups for consistency and UX

distribution_fe/lib/api/users.ts

@@ -13,6 +13,10 @@ export interface CreateUserBody {
 
 export interface UpdateUserBody {
   fullName: string
+  username?: string
+  roleId?: string
+  currentPassword?: string
+  newPassword?: string
 }
 
 export const users = {
@@ -28,9 +32,6 @@ export const users = {
   update: (id: string, body: UpdateUserBody) =>
     api.put<UserResponse>(`/users/${id}`, body).then(r => r.data),
 
-  assignRole: (id: string, roleId: string) =>
-    api.put<UserResponse>(`/users/${id}/role`, { roleId }).then(r => r.data),
-
   deactivate: (id: string) =>
     api.delete(`/users/${id}`),
 }