Add paginated users/roles, user status, frontend permissions, profile pictures, identifier file storage

- Users page: paginated, searchable, sortable with inline roles (no N+1)
- Roles page: paginated, searchable, sortable + /roles/all for dropdowns
- User is_active field with migration, PATCH toggle, auth check (disabled=401)
- Frontend permission checks: auth store loads permissions, sidebar/buttons conditional
- Profile pictures via file storage for users and members, avatar component
- Identifier images use file storage API instead of base64
- Fix TypeScript errors across admin UI
- 64 API tests passing (10 new)

packages/backend/src/db/schema/users.ts

@@ -1,4 +1,4 @@
-import { pgTable, uuid, varchar, timestamp, pgEnum, uniqueIndex } from 'drizzle-orm/pg-core'
+import { pgTable, uuid, varchar, timestamp, pgEnum, uniqueIndex, boolean } from 'drizzle-orm/pg-core'
 import { companies } from './stores.js'
 
 export const userRoleEnum = pgEnum('user_role', [
@@ -19,6 +19,7 @@ export const users = pgTable('user', {
   firstName: varchar('first_name', { length: 100 }).notNull(),
   lastName: varchar('last_name', { length: 100 }).notNull(),
   role: userRoleEnum('role').notNull().default('staff'),
+  isActive: boolean('is_active').notNull().default(true),
   createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
   updatedAt: timestamp('updated_at', { withTimezone: true }).notNull().defaultNow(),
 })