Approvals UI: overlay covers the chat bar, every card twice with different words and buttons #260

Approvals UI (live verification, main 7922771):

• The global overlay sits on top of the in-chat bar and hides its Reject buttons.
• Every approval is drawn twice (bar and overlay), with different words ("Helper → Chief" vs "Sent by Helper"), different buttons (the overlay has no Always approve), and a long header ("Message to @chief.uia1415.home · messages to @uia1415.home's Bots need your approval").
• The friend's Bot is named by its handle in the overlay, "Chief" in the bar.
• A Bot's direct message to a friend showed in a Face-to-face room that merely contains that friend, not in the Bot's own chat.
• "Always approve" is a third full button next to Approve / Reject.

Fix: one place per context. The chat's dock draws the card and claims its approval ids; the overlay draws no second card for them. An approval no open chat shows becomes a small pointer ("Helper → UiA1415's Chief · Waiting for approval · Review") that opens its chat, after a short delay so moving between chats does not flash it. Other policies' approvals keep the overlay card, with the same two lines and Approve / Reject. Cards name the friend's Bot as the chat list does. Always approve is a quiet link. Local holds no longer match a room by participant handle.