Reduce Settings page and config reload overhead

Mount nearby shortcut and theme rows, preserve gallery keyboard navigation, reset page scrolling, and reuse native themes during palette transitions. Prepare and deduplicate live config reloads on a worker and apply only changed runtime sections.

Align pointer focus and overview selection on overlapping outputs, add regression coverage, and clean up workspace Clippy warnings.

compositor/src/main.rs

@@ -96,6 +96,17 @@ fn main() -> Result<(), Box<dyn Error>> {
     let display = Display::new()?;
     let mut state = Ferese::new(&mut event_loop, display, runtime)?;
     state.config_source = initial_source.filter(|source| source.len() <= 60 * 1024);
+    state.config_sections = state
+        .config_source
+        .as_deref()
+        .and_then(|source| ferese_config::Document::parse(source).ok())
+        .map(|document| {
+            let mut value = document.value().clone();
+            if let Some(object) = value.as_object_mut() {
+                object.remove("theme");
+            }
+            value
+        });
     theme::init(&mut event_loop, &mut state, candidate)?;
     resume::init(&mut event_loop)?;
     overview::init_font_loader(&mut event_loop, &mut state)?;