Reverts merge 1be46f1a which introduced the 4-mode titlebar enum
(qbz/system/plasma/hidden), variant-aware rendering (full/stripped),
GDK_BACKEND=x11 coercion for Plasma, and per-mode mounting in +page.
The "stripped strip mounted alongside Plasma SSD" architecture caused
all titlebar modes to render incorrectly in the production binary —
empty space at top, separation gap above the now-playing bar, controls
visible without a backing strip. Reverting restores v1.2.10 behavior:
two booleans (use_system_titlebar + hide_title_bar), no variants, no
GDK coercion. Plasma support is dropped pending a less brittle redesign.
Conflicts in SettingsView.svelte resolved by taking the pre-merge side
for the four titlebar UI blocks; non-titlebar additions in this cycle
(Discord RPC settings, reserve-DAC, offline cache nav) preserved.
cc
vicrodh
e3bdbc9ab4