fix(ui): 批量修复字号/间距/弹窗/表格 UI 问题（接续）

- 密码修改弹窗: max-w-md→max-w-lg, py-3.5→py-3, text-[10px]→text-xs
- 角色选择按钮: flex-wrap + min-w-[100px] 防窄屏换行
- 用户表格: overflow-x-auto + min-w-[700px] 响应式
- 全部 42 处 text-[10px] → text-xs（标签/徽章/说明文字）
- PermissionSettingsView 剩余 2 处 text-[10px]→text-xs

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/components/views/PermissionSettingsView.tsx

@@ -329,7 +329,7 @@ export const PermissionSettingsView: React.FC = () => {
                   <Key size={18} className="text-indigo-600" />
                   {selectedRole.name}
                   {selectedRole.isSystem && (
-                    <span className="text-[10px] font-black text-slate-400 bg-slate-100 px-2 py-0.5 rounded-full uppercase tracking-wider">
+                    <span className="text-xs font-black text-slate-400 bg-slate-100 px-2 py-0.5 rounded-full uppercase tracking-wider">
                       系统角色
                     </span>
                   )}
@@ -392,7 +392,7 @@ export const PermissionSettingsView: React.FC = () => {
                         {category}
                       </span>
                       <span className={cn(
-                        'text-[10px] font-bold px-2 py-0.5 rounded-full',
+                        'text-xs font-bold px-2 py-0.5 rounded-full',
                         allChecked
                           ? 'bg-indigo-100 text-indigo-600'
                           : someChecked