Add project components 421-435; Checkbox turns only when on

Fifteen project components: QuestBoard, TaskItem, TaskList, Milestones,
Burndown, Pomodoro, Priority, AssigneePicker, LabelPicker, TimeTracker,
Roadmap, SprintPanel, IssueCard, Checklist and WorkloadBar.

QuestBoard is one base that draws TODO, DOING and DONE; arrows move,
Alt with an arrow carries a card, and a drag carries it live. Priority
draws 12x12 bars, and Critical is on fire. Pomodoro banks time on PAUSE
and the tomato sleeps through the rest. Extreme inputs fail fast or
saturate instead of wrapping.

MyGo's CheckboxBase turns its value before Disabled is set, so
input.Checkbox now hands it a copy and keeps only turns of an enabled
base. The home scene test checks the sky row, not one pixel that
falling snow can cover.

pixel/messages.go

@@ -50,6 +50,10 @@ var messages = map[Locale]map[string]string{
 		"in_bin": "IN THE BIN: %d", "empty_trash": "EMPTY", "no_preview": "NO PREVIEW", "kind": "KIND", "size": "SIZE", "created": "CREATED",
 		"modified": "MODIFIED", "packed": "PACKED", "archive_total": "%d FILES: %s → %s", "link": "LINK", "access": "ACCESS",
 		"access_levels": "VIEW COMMENT EDIT", "synced": "SYNCED", "syncing": "SYNCING", "sync_failed": "SYNC FAILED",
+		"todo": "TODO", "doing": "DOING", "low": "LOW", "medium": "MEDIUM", "high": "HIGH", "critical": "CRITICAL", "nobody": "NOBODY",
+		"filters": "FILTERS", "task_filters": "OPEN DONE URGENT", "quest_complete": "QUEST COMPLETE!", "focus": "FOCUS", "rest": "REST",
+		"ahead": "AHEAD", "behind": "BEHIND", "ideal": "IDEAL", "work_left": "LEFT", "total": "TOTAL", "days_left": "%d DAYS LEFT",
+		"last_day": "LAST DAY", "over": "OVER", "sprint_points": "%d/%d POINTS", "hours_of": "%s/%s H",
 	},
 	Zh: {
 		"ok": "确定", "cancel": "取消", "yes": "是", "no": "否", "close": "关闭",
@@ -98,6 +102,10 @@ var messages = map[Locale]map[string]string{
 		"in_bin": "回收站：%d 项", "empty_trash": "清空", "no_preview": "无法预览", "kind": "类型", "size": "大小", "created": "创建",
 		"modified": "修改", "packed": "压缩后", "archive_total": "%d 个文件：%s → %s", "link": "链接", "access": "权限",
 		"access_levels": "查看 评论 编辑", "synced": "已同步", "syncing": "同步中", "sync_failed": "同步出错",
+		"todo": "待办", "doing": "进行中", "low": "低", "medium": "中", "high": "高", "critical": "危急", "nobody": "无人",
+		"filters": "筛选", "task_filters": "未完成 已完成 火急", "quest_complete": "任务完成！", "focus": "专注", "rest": "休息",
+		"ahead": "超前", "behind": "落后", "ideal": "理想", "work_left": "剩余", "total": "合计", "days_left": "还剩 %d 天",
+		"last_day": "最后一天", "over": "已结束", "sprint_points": "%d/%d 点", "hours_of": "%s/%s 小时",
 	},
 }