Accessible names for folders, files and messages

[FrayxRulez]

Accessible names, from a pass over what the UnigramPlus NVDA add-on works around.

What it does

• The selected chat folder is announced on switch. Ctrl+1..9, Ctrl+Shift+Up/Down and the carousel swipe change the folder with no focus move, and neither event they raise is one a screen reader reads: selection on an unfocused list is ignored, and the chat list swapping its items is a structure change. The new folder is now announced from the chat list's peer.
• The folder tabs have a name. They read as their two text children today — "All 535" — because the badge is a number with nothing to say what it counts. ChatFolderViewModel.AutomationName composes the title and {n} unread chats; it is bound, not assigned, so the badge can move without the container being prepared again. The same string is what the switch announces.
• An explicit name on a list row now wins over TextListViewItemAutomationPeer's text walk, which silently shadowed every AutomationProperties.SetName on a container.
• File buttons say what they act on: "Download file, report.pdf, 2.4 MB", "Play, Track — Artist, 3:21". The stable part only — progress stays in the subtitle, since a name that changed with it would be re-read on every update.
• Two decorative progress bars are hidden: the poll vote bar (the percentage is already in the option's name) and the video position indicator. These are the only real ProgressBars in the message surfaces; the add-on's progress-tracking feature reads the subtitle text, which is untouched.
• Automation.GetDescription is removed — it had no callers.

Corrections to what I said earlier

The message name already includes reactions, the replied-to sender, the forward origin, edited/sending state and "Not seen" before the content. I had read Automation.GetDescription, which is dead code; the live path is MessageBubble.GetAutomationName. The identity icon already names itself too, so the add-on's "Identity root" workaround is obsolete.

Worth a look in review

• The name-precedence change touches every row built on TextListViewItem, not just folders. It should only ever add a name where one was set and ignored.
• AccDescrUnreadChats_one/_other is a new string — the count is unread chats, which is what the badge counts.

Not built, not tested with a reader.