fix: hide quota display for regular users

fix image mobile controls

fix: 修复生图比例选择框被 overflow-hidden 遮挡的问题

feat: 图片管理添加单张下载和批量 ZIP 下载功能

增加图片会话重命名功能

Fix image PWA rounding and zoom

Fix image PWA touch and scrolling

Refine image conversation record controls

Improve image PWA interactions

Limit image generation count

Merge branch 'fork/qup1010/main'

feat: improve mobile image generation UX

fix(image): persist image tasks across refreshes

增加图片管理、日志管理，优化敏感词等场景

support optional image size flow

feat(image): 实现图片比例选择并进行移动端响应式优化

refine image chat editing flow

refactor(image-web): share conversation stats helper

feat(image-web): support stateless continue edit history

feat(image): polish image conversation input display

feat(image): refine reference image composer interactions

Align image edit API with OpenAI multipart format

feat(image): refine import and preview flows

feat(image): 支持文生图和编辑图功能

feat(image): 添加图片编辑功能并重构图像页面组件