🐛 Fix removeChild crash on all portal components

The previous fix (80b64c440c) only addressed portal-on-document* but
there were 6 additional components that portaled directly to
document.body, causing the same race condition when React attempted
to remove a node that had already been detached during concurrent
state updates (e.g. navigating away while a context menu is open).

Apply the dedicated-container pattern consistently to all portal
sites: modal, context menus, combobox dropdown, theme selector, and
tooltip. Each component now creates a dedicated <div> container
appended to body on mount and removed on cleanup, giving React an
exclusive containerInfo for each portal instance.

Signed-off-by: Andrey Antukh <niwi@niwi.nz>

frontend/src/app/main/ui/ds/tooltip/tooltip.cljs

@@ -159,6 +159,8 @@
 
         tooltip-ref (mf/use-ref nil)
 
+        container (mf/use-memo #(dom/create-element "div"))
+
         id
         (d/nilv id internal-id)
 
@@ -244,6 +246,11 @@
                                         content
                                         aria-label)})]
 
+    (mf/with-effect []
+      (let [body (dom/get-body)]
+        (dom/append-child! body container)
+        #(dom/remove-child! body container)))
+
     (mf/use-effect
      (mf/deps tooltip-id)
      (fn []
@@ -295,4 +302,4 @@
            [:div {:class (stl/css :tooltip-content)} content]
            [:div {:class (stl/css :tooltip-arrow)
                   :id "tooltip-arrow"}]]])
-        (.-body js/document)))]))
+        container))]))

frontend/src/app/main/ui/modal.cljs

@@ -83,7 +83,12 @@
 (mf/defc modal-container*
   {::mf/props :obj}
   []
-  (when-let [modal (mf/deref ref:modal)]
-    (mf/portal
-     (mf/html [:> modal-wrapper* {:data modal :key (dm/str (:id modal))}])
-     (dom/get-body))))
+  (let [container (mf/use-memo #(dom/create-element "div"))]
+    (mf/with-effect []
+      (let [body (dom/get-body)]
+        (dom/append-child! body container)
+        #(dom/remove-child! body container)))
+    (when-let [modal (mf/deref ref:modal)]
+      (mf/portal
+       (mf/html [:> modal-wrapper* {:data modal :key (dm/str (:id modal))}])
+       container))))

frontend/src/app/main/ui/workspace/tokens/management/context_menu.cljs

@@ -515,7 +515,13 @@
         dropdown-direction  (deref dropdown-direction*)
         dropdown-direction-change* (mf/use-ref 0)
         top                 (+ (get-in mdata [:position :y]) 5)
-        left                (+ (get-in mdata [:position :x]) 5)]
+        left                (+ (get-in mdata [:position :x]) 5)
+        container           (mf/use-memo #(dom/create-element "div"))]
+
+    (mf/with-effect []
+      (let [body (dom/get-body)]
+        (dom/append-child! body container)
+        #(dom/remove-child! body container)))
 
     (mf/use-effect
      (mf/deps is-open?)
@@ -554,4 +560,4 @@
                 :on-context-menu prevent-default}
           (when mdata
             [:& token-context-menu-tree (assoc mdata :width @width :on-delete-token on-delete-token)])]])
-       (dom/get-body)))))
+       container))))

frontend/src/app/main/ui/workspace/tokens/management/forms/controls/combobox.cljs

@@ -92,6 +92,8 @@
         icon-button-ref   (mf/use-ref nil)
         ref               (or ref internal-ref)
 
+        container         (mf/use-memo #(dom/create-element "div"))
+
         raw-tokens-by-type (mf/use-ctx muc/active-tokens-by-type)
 
         filtered-tokens-by-type
@@ -267,6 +269,11 @@
     (mf/with-effect [dropdown-options]
       (mf/set-ref-val! options-ref dropdown-options))
 
+    (mf/with-effect []
+      (let [body (dom/get-body)]
+        (dom/append-child! body container)
+        #(dom/remove-child! body container)))
+
     (mf/with-effect [is-open* ref wrapper-ref]
       (when is-open
         (let [handler (fn [event]
@@ -305,4 +312,4 @@
                                   :empty-to-end empty-to-end
                                   :wrapper-ref dropdown-ref
                                   :ref set-option-ref}])
-          (dom/get-body))))]))
+          container)))]))

frontend/src/app/main/ui/workspace/tokens/management/node_context_menu.cljs

@@ -35,6 +35,7 @@
         dropdown-direction-change* (mf/use-ref 0)
         top                 (+ (get-in mdata [:position :y]) 5)
         left                (+ (get-in mdata [:position :x]) 5)
+        container           (mf/use-memo #(dom/create-element "div"))
 
         delete-node          (mf/use-fn
                               (mf/deps mdata)
@@ -44,6 +45,11 @@
                                   (when node
                                     (on-delete-node node type)))))]
 
+    (mf/with-effect []
+      (let [body (dom/get-body)]
+        (dom/append-child! body container)
+        #(dom/remove-child! body container)))
+
     (mf/with-effect [is-open?]
       (when (and (not= 0 (mf/ref-val dropdown-direction-change*)) (= false is-open?))
         (reset! dropdown-direction* "down")
@@ -80,4 +86,4 @@
                         :type "button"
                         :on-click delete-node}
                (tr "labels.delete")]]])]])
-       (dom/get-body)))))
+       container))))

frontend/src/app/main/ui/workspace/tokens/themes/theme_selector.cljs

@@ -111,7 +111,14 @@
                (let [rect (dom/get-bounding-rect node)]
                  (swap! state* assoc
                         :is-open? true
-                        :rect rect))))))]
+                        :rect rect))))))
+
+        container (mf/use-memo #(dom/create-element "div"))]
+
+    (mf/with-effect []
+      (let [body (dom/get-body)]
+        (dom/append-child! body container)
+        #(dom/remove-child! body container)))
 
     [:div {:on-click on-open-dropdown
            :disabled (not can-edit?)
@@ -140,4 +147,4 @@
            [:& theme-options {:active-theme-paths active-theme-paths
                               :themes themes
                               :on-close on-close-dropdown}]]])
-        (dom/get-body)))]))
+        container))]))