chore: clippy send + sync warnings, drop warnings

src/command/cmd.rs

@@ -38,7 +38,7 @@ pub struct CmdContext<'a> {
 }
 
 /// A command that reads state and produces effects.
-pub trait Cmd: Debug {
+pub trait Cmd: Debug + Send + Sync {
     fn execute(&self, ctx: &CmdContext) -> Vec<Box<dyn Effect>>;
     fn name(&self) -> &str;
 }

src/ui/app.rs

@@ -141,9 +141,11 @@ impl App {
     pub fn handle_key(&mut self, key: KeyEvent) -> Result<()> {
         // Transient keymap (prefix key sequence) takes priority
         if let Some(transient) = self.transient_keymap.take() {
+            let effects = {
                 let ctx = self.cmd_context(key.code, key.modifiers);
-            if let Some(effects) = transient.dispatch(&ctx, key.code, key.modifiers) {
+                transient.dispatch(&ctx, key.code, key.modifiers)
-                drop(ctx);
+            };
+            if let Some(effects) = effects {
                 self.apply_effects(effects);
             }
             // Whether matched or not, transient is consumed
@@ -151,13 +153,14 @@ impl App {
         }
 
         // Try mode keymap — if a binding matches, apply effects and return
+        let effects = {
             let ctx = self.cmd_context(key.code, key.modifiers);
-        if let Some(effects) = self.keymap_set.dispatch(&ctx, key.code, key.modifiers) {
+            self.keymap_set.dispatch(&ctx, key.code, key.modifiers)
-            drop(ctx);
+        };
+        if let Some(effects) = effects {
             self.apply_effects(effects);
             return Ok(());
         }
-        drop(ctx);
 
         // Fallback: old-style handlers for modes not yet migrated to keymaps
         match &self.mode.clone() {