Scope redraw requests and avoid redundant animation fallback wakeups

Instrument redraw sources, per-output request coalescing, and animation fallback scheduling. Route local visual changes to their affected outputs while preserving deferred grab and gesture updates.

Schedule fallback recovery using each orphaned animation output's refresh interval, suppress it while a normal frame chain exists, and retain requested final frames after scheduling failures. Add mixed-refresh, cursor footprint, frame-chain, and disconnect regressions and document measurement limits.

compositor/src/state/windows.rs

@@ -660,7 +660,7 @@ impl Ferese {
         self.windows.update(focused, |record| {
             record.closing.get_or_insert_default();
         });
-        crate::backends::direct::render_all(self);
+        crate::backends::direct::render_window(self, focused);
     }
 
     pub(crate) fn close_managed_window(&mut self, id: WindowId) -> bool {
@@ -672,7 +672,7 @@ impl Ferese {
             self.windows.update(id, |record| {
                 record.closing.get_or_insert_default();
             });
-            crate::backends::direct::render_all(self);
+            crate::backends::direct::render_window(self, id);
         } else {
             self.send_window_close(id);
         }