Fix window memory never saving on close, and split-screen icon/primary bugs

Screenshotted the just-split display on request rather than guessing --
it showed why windows never seem to remember placement/size, plus two
real split-screen bugs.

Window memory (WindowManager::remembered_geometry) was correctly wired
on the read side, but the only writes came from end_drag/end_resize in
dragresize.rs - a real drag or resize. A window the user opens, looks
at, and closes without ever touching its edges had nothing recorded, so
reopening it always fell back to a fresh cascade placement, for what is
probably most ordinary window lifecycles. remove_window now also
snapshots geometry (same app_id-non-empty gate the drag/resize sites
use), persisted at both of its wayland-side call sites the same way the
drag/resize-release site already does.

desktop_icon_origins mirrored the full icon set onto every Monitor entry
when general.desktop_icons_all_monitors is on - which, after a
srd.monitor.split, is one entry per split part of the same physical
screen, not one per real monitor. Extracted into a separately-tested
icon_origins_for that collapses split parts of the same connector back
to one origin, keeping a genuinely separate monitor's own origin intact.

Found while fixing that: every split part also reported primary: true
(computed from the connector's name, which doesn't vary per part) --
fixed by gating on part == 0 too.

1 files changed, 10 insertions, 1 deletions

diff --git a/crates/wayland/src/udev/platform.rs b/crates/wayland/src/udev/platform.rs
index 37abf5d..d7132ee 100644
--- a/crates/wayland/src/udev/platform.rs
+++ b/crates/wayland/src/udev/platform.rs
@@ -856,7 +856,16 @@ impl Platform for UdevPlatform {
                 // erasing the split it was placed to respect.
                 m.full_geometry = srdwm_core::monitor::split_rect(full, part, parts, rows);
                 m.maximize_geometry = srdwm_core::monitor::split_rect(maximize, part, parts, rows);
-                m.primary = primary_name.as_deref() == Some(name.as_str());
+                // Only the first part of a split connector, not every one
+                // of them - `primary_name` names the *connector*, which
+                // doesn't change across `0..parts`, so this used to mark
+                // every split part primary at once. Two (or more) `Monitor`
+                // entries all claiming `primary: true` broke the "exactly
+                // one primary" assumption every caller of this field
+                // reasonably makes (`desktop_icon_origins`'s own single-
+                // monitor branch, concretely, which just took whichever
+                // `.find(|m| m.primary)` happened to match first).
+                m.primary = part == 0 && primary_name.as_deref() == Some(name.as_str());
                 m.split = parts > 1;
                 m.scale = scale;
                 out.push(m);