fix(core): Initialize command cache when a capability is added (#11785)

Author: lars-berger

.changes/fix-add-capability-panic.md

@@ -0,0 +1,5 @@
+---
+tauri: 'patch:bug'
+---
+
+Fix panic when a plugin command is run with a capability added at runtime (via `Manager::add_capability`).

crates/tauri/src/ipc/authority.rs

@@ -322,7 +322,10 @@ impl RuntimeAuthority {
             .extend(command_scope.allow.clone());
           command_scope_entry.deny.extend(command_scope.deny.clone());
 
-          self.scope_manager.command_cache.remove(&scope_id);
+          self
+            .scope_manager
+            .command_cache
+            .insert(scope_id, StateManager::new());
         }
       }