docs(backlog): queue laptop-docking UX and fullscreen-waybar items

29 (docking/external-monitor UX): unplug→restore the internal panel,
plug→extend by default, easy HDMI/DP audio routing, and clearer
workspace↔monitor behavior. Raised by Bernardo; [human]/[blocked:hw].

30 (waybar overlaps fullscreen video): a fullscreen YouTube video is
drawn under the bar's overlay layer; hide the bar on true fullscreen.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

agent/BACKLOG.md

@@ -26,6 +26,37 @@ next, in what order*.
 
 ## NEXT
 
+### 29. Laptop docking / external-monitor UX `[human]` (needs hardware)
+(Raised by Bernardo, 2026-07-07.) The shipped display application is
+weak and unintuitive, and Hyprland's model for workspaces across
+multiple monitors is unclear to users. Make docking a laptop to
+external monitors first-class:
+- **Unplug → restore the panel:** when the external monitor is removed
+  and the laptop's own panel is off (was the only-active output while
+  docked), turn the internal panel back on *immediately* — never leave
+  the user staring at a dead lid.
+- **Plug → extend by default:** a newly connected external monitor
+  should *extend* the laptop panel (not mirror), out of the box.
+- **HDMI audio:** an easy way to route audio to the monitor when a
+  display with audio (HDMI/DP) is connected — a menu toggle / quick
+  action, not manual pavucontrol digging.
+- **Workspaces + multi-monitor:** document (cheatsheet + menu) and,
+  where sensible, sane defaults for how Hyprland binds workspaces to
+  outputs so multi-monitor behavior is predictable.
+Likely a `hyprland`/`kanshi`-style profile layer plus a menu surface;
+split into slices before starting. `[blocked:hw]` for the real
+dock/undock + HDMI-audio verification (see HARDWARE-QUEUE.md).
+
+### 30. Waybar overlaps fullscreen video
+(Raised by Bernardo, 2026-07-07.) A fullscreen YouTube video (browser
+fullscreen) leaves Waybar drawn on top of the video instead of being
+covered. Waybar sits on an overlay/top layer that outranks the
+fullscreen window's surface. Fix so a true fullscreen window hides the
+bar — likely a Hyprland `layerrule`/`windowrule` or lowering Waybar's
+layer, or wiring the bar to auto-hide on fullscreen. Verify with
+browser fullscreen (F on YouTube) AND a native fullscreen app; make
+sure the bar returns on exit. Small, agent-doable.
+
 ### 28. Theme UI review — make every surface stunning `[big]`
 (Raised by Bernardo, 2026-07-05 — placed at the head of NEXT; reorder
 freely.) A thorough visual pass over the whole themed UI — Waybar (the