show note about old options screen if any add-ons are installed

qt/aqt/mediasrv.py

@@ -282,9 +282,9 @@ def i18n_resources() -> bytes:
 
 def deck_configs_for_update() -> bytes:
     args = from_json_bytes(request.data)
-    return aqt.mw.col.decks.get_deck_configs_for_update(
-        deck_id=args["deckId"]
-    ).SerializeToString()
+    msg = aqt.mw.col.decks.get_deck_configs_for_update(deck_id=args["deckId"])
+    msg.have_addons = aqt.mw.addonManager.dirty
+    return msg.SerializeToString()
 
 
 def update_deck_configs_request() -> bytes:

rslib/backend.proto

@@ -935,6 +935,7 @@ message DeckConfigsForUpdate {
   DeckConfig defaults = 3;
   bool schema_modified = 4;
   bool v3_scheduler = 5;
+  bool have_addons = 6;
 }
 
 message UpdateDeckConfigsIn {

rslib/src/deckconfig/update.rs

@@ -38,6 +38,7 @@ impl Collection {
                 .get_collection_timestamps()?
                 .schema_changed_since_sync(),
             v3_scheduler: self.get_bool(BoolKey::Sched2021),
+            have_addons: false,
         })
     }
 

ts/deckoptions/Addons.svelte

@@ -11,10 +11,16 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     const auxData = state.currentAuxData;
 </script>
 
-{#if $components.length}
+{#if $components.length || state.haveAddons}
     <div>
         <h2>Add-ons</h2>
 
+        <p>
+            If you're using an add-on that hasn't been updated to use this new screen
+            yet, you can access the old deck options screen by holding down the shift
+            key when opening the options.
+        </p>
+
         {#each $components as addon}
             <svelte:component this={addon.component} bind:data={$auxData} {...addon} />
         {/each}

ts/deckoptions/lib.ts

@@ -58,6 +58,7 @@ export class DeckOptionsState {
     readonly defaults: ConfigInner;
     readonly addonComponents: Writable<DynamicSvelteComponent[]>;
     readonly v3Scheduler: boolean;
+    readonly haveAddons: boolean;
 
     private targetDeckId: number;
     private configs: ConfigWithCount[];
@@ -84,6 +85,7 @@ export class DeckOptionsState {
             this.configs.findIndex((c) => c.config.id === this.currentDeck.configId)
         );
         this.v3Scheduler = data.v3Scheduler;
+        this.haveAddons = data.haveAddons;
 
         // decrement the use count of the starting item, as we'll apply +1 to currently
         // selected one at display time