- Add custom publish time field to article create/edit forms
- Support datetime-local input for manual time setting
- Auto-set on first publish if left blank
- Works for both admin and user article forms
- Display last updated time on article detail page
- Show both published time and last updated time
- Auto-maintained by GORM on each update
- Format: YYYY-MM-DD HH:MM
- Add i18n support for new fields
- article_published_at: Published Time / 发布时间
- article_published_at_hint: Leave blank to auto-set on publish / 留空则在发布时自动设置
- article_last_updated: Last Updated / 最后更新
- Update handlers and templates
- handlers/article.go: Add parsePublishedAt/formatPublishedAt functions
- handlers/home.go: Add formatUpdateTime function
- handlers/my_articles.go: Support custom publish time in user articles
- templates: Add datetime-local inputs and time display
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>