fix: refocus search input on repeated Cmd+F

When the search bar was already open, Cmd+F was a no-op because setting
the isOpen atom to true again had no effect. Now detect the already-open
case and directly focus + select-all the input so the user can
immediately type a new query.

Author: Shay12tg

frontend/app/store/keymodel.ts

@@ -695,7 +695,15 @@ function registerGlobalKeys() {
             return false;
         }
         if (bcm.viewModel.searchAtoms) {
-            globalStore.set(bcm.viewModel.searchAtoms.isOpen, true);
+            if (globalStore.get(bcm.viewModel.searchAtoms.isOpen)) {
+                // Already open — just focus the input and select all so the user
+                // can immediately type a new query.
+                const input = document.querySelector<HTMLInputElement>(".search-container input");
+                input?.focus();
+                input?.select();
+            } else {
+                globalStore.set(bcm.viewModel.searchAtoms.isOpen, true);
+            }
             return true;
         }
         return false;