Add files components 406-420; Tree opens to a known choice

Fifteen file components: FileExplorer, FileGrid, FileIcon, PathBar,
MemoryCard, DiskUsage, UploadQueue, Trash, RecentFiles, FilePreview,
ArchiveViewer, FileDetails, SharePanel, SyncStatus and QuotaMeter.

FileIcon draws six kinds as hand-placed 12x12 pages and a folder. The
browsers build on data.Tree, List, GridView and Table; ArchiveViewer
owns its sort and keeps the caller's index on its entry. UploadQueue
keys rows by name so focus stays on its row. SharePanel never logs the
link. SyncStatus turns its arrows on Busy steps, so syncing moves under
Reduce Motion.

data.Tree now opens the closed branches above a chosen path it knows,
so a caller's starting path survives the first frame.

pixel/messages.go

@@ -45,6 +45,11 @@ var messages = map[Locale]map[string]string{
 		"added": "ADDED", "fixed": "FIXED", "changed": "CHANGED", "hair": "HAIR", "eyes": "EYES", "outfit": "OUTFIT",
 		"hair_color": "HAIR COLOR", "outfit_color": "OUTFIT COLOR", "bgm": "BGM", "se": "SE", "voice": "VOICE",
 		"styles": "SPIKY BOB BALD", "looks": "DOTS WIDE SLEEPY", "outfits": "TUNIC ROBE ARMOR", "hues": "DARK GOLD RED VIOLET SKY", "time_left": "TIME LEFT", "in_use": "IN USE", "rating": "RATING", "message": "MESSAGE", "symbols": "SYMBOLS",
+		"folder": "FOLDER", "text_file": "TEXT", "image_file": "IMAGE", "audio_file": "AUDIO", "code_file": "CODE", "archive_file": "ARCHIVE",
+		"folders": "FOLDERS", "free": "FREE", "blocks_used": "%d/15 BLOCKS", "delete": "DELETE", "used_of": "%s OF %s", "failed": "FAILED",
+		"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",
 	},
 	Zh: {
 		"ok": "确定", "cancel": "取消", "yes": "是", "no": "否", "close": "关闭",
@@ -88,6 +93,11 @@ var messages = map[Locale]map[string]string{
 		"added": "新增", "fixed": "修复", "changed": "改动", "hair": "发型", "eyes": "眼睛", "outfit": "服装",
 		"hair_color": "发色", "outfit_color": "衣色", "bgm": "音乐", "se": "音效", "voice": "语音",
 		"styles": "刺头 短发 光头", "looks": "圆眼 大眼 睡眼", "outfits": "短衣 长袍 铠甲", "hues": "墨 金 红 堇 蓝", "time_left": "剩余时间", "in_use": "使用中", "rating": "评分", "message": "留言", "symbols": "符号",
+		"folder": "文件夹", "text_file": "文本", "image_file": "图片", "audio_file": "音频", "code_file": "代码", "archive_file": "压缩包",
+		"folders": "文件夹", "free": "空闲", "blocks_used": "已用 %d/15 块", "delete": "删除", "used_of": "已用 %s，共 %s", "failed": "失败",
+		"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",
 	},
 }