feat(storage): scoped grants (subtree, ro/rw), narrow-only, release revokes all holders; IPC KEEP_DELEGATE opt-in; shell cd/pwd, programs get ro cwd

crates/servers/input-server/src/server.rs

@@ -88,7 +88,7 @@ impl<D: InputDevice> Server for InputServer<D> {
         }
     }
 
-    fn handle_call(&mut self, _badge: usize, words: [usize; 4], cap: Option<CapSlot>) -> ([usize; 4], Option<CapSlot>) {
+    fn handle_call(&mut self, _badge: usize, words: [usize; 4], cap: Option<CapSlot>) -> ([usize; 4], Option<libkos::syscall::Give>) {
         if words[0] == types::input::SUBSCRIBE {
             self.subscriber = cap;
             return ([0; 4], None);