feat(ui): friends list as lobby-style rows with kebab + confirm modals

Settings -> Friends previously rendered each friend as a bordered card with
two always-visible text buttons (Remove / Block) that fired immediately. Rework
the whole screen to the lobby's visual language: one-line rows split by
hairline separators across all three sections (friends, incoming requests,
blocked).

Each friend row gains a right-hand kebab that slides the row open to reveal two
icon actions split by a vertical divider -- block (no-entry) and remove (cross)
-- mirroring the lobby's slide-to-reveal. Both actions now require a
confirmation modal; since the slide moves a short name off-screen, the modal
keeps a generic title and shows the friend's name in the body, above the
buttons, so a long name cannot stretch the sheet. Incoming keeps its
accept/decline buttons and blocked keeps unblock, inline on their rows.

Add the friends.actions / friends.blockConfirm / friends.unfriendConfirm keys
to both i18n catalogs and document the flow in FUNCTIONAL (+_ru).

docs/FUNCTIONAL.md

@@ -213,6 +213,9 @@ block **overrides but does not delete** an existing friendship (so you may block
 they keep seeing you as one); active games are never interrupted — you can finish them, with
 the blocked opponent's chat composer hidden (only the log remains). Blocking from a game card
 mirrors the block in **Settings → Friends**; **unblock** and **unfriend** live there only.
+On Settings → Friends each friend is a one-line row whose right-hand kebab (⋮) slides open
+**block 🚫** and **remove ✖️** icon actions, and each action is gated by a confirmation
+that names the friend (*Block this player?* / *Remove from friends?*).
 Blocking an **auto-match opponent who is secretly a robot** behaves the same in that game
 (struck name, hidden composer) and lists the blocked opponent under the name you saw, but is
 recorded only against that game — the disguise holds, the shared robot is never globally